kernel/kernel-arm64.patch

 Documentation/arm64/arm-acpi.txt                 | 323 ++++++++++
 Documentation/kernel-parameters.txt              |   3 +-
 arch/arm/kvm/mmu.c                               |   4 +
 arch/arm64/Kconfig                               |   9 +
 arch/arm64/Makefile                              |   1 +
 arch/arm64/include/asm/acenv.h                   |  18 +
 arch/arm64/include/asm/acpi.h                    | 102 +++
 arch/arm64/include/asm/cpu_ops.h                 |   1 +
 arch/arm64/include/asm/elf.h                     |   3 +-
 arch/arm64/include/asm/pci.h                     |  51 ++
 arch/arm64/include/asm/psci.h                    |   3 +-
 arch/arm64/include/asm/smp.h                     |  10 +-
 arch/arm64/kernel/Makefile                       |   4 +-
 arch/arm64/kernel/acpi.c                         | 398 ++++++++++++
 arch/arm64/kernel/cpu_ops.c                      |   8 +-
 arch/arm64/kernel/efi.c                          |  37 ++
 arch/arm64/kernel/pci.c                          |  97 ++-
 arch/arm64/kernel/psci.c                         |  78 ++-
 arch/arm64/kernel/setup.c                        |  44 +-
 arch/arm64/kernel/smp.c                          |   2 +-
 arch/arm64/kernel/smp_parking_protocol.c         | 110 ++++
 arch/arm64/kernel/time.c                         |   7 +
 arch/arm64/mm/dma-mapping.c                      | 112 ++++
 arch/arm64/pci/Makefile                          |   2 +
 arch/arm64/pci/mmconfig.c                        | 292 +++++++++
 arch/arm64/pci/pci.c                             | 461 ++++++++++++++
 drivers/acpi/Kconfig                             |   6 +-
 drivers/acpi/Makefile                            |   6 +-
 drivers/acpi/bus.c                               |   3 +
 drivers/acpi/internal.h                          |   5 +
 drivers/acpi/osl.c                               |   6 +-
 drivers/acpi/processor_core.c                    |  37 ++
 drivers/acpi/sleep-arm.c                         |  28 +
 drivers/acpi/tables.c                            |  48 +-
 drivers/acpi/utils.c                             |  26 +
 drivers/ata/Kconfig                              |   2 +-
 drivers/ata/ahci_platform.c                      |  13 +
 drivers/ata/ahci_xgene.c                         |  30 +-
 drivers/clocksource/arm_arch_timer.c             | 136 +++-
 drivers/input/keyboard/gpio_keys_polled.c        |   1 +
 drivers/iommu/arm-smmu.c                         |   8 +-
 drivers/irqchip/irq-gic-v3.c                     |  10 +
 drivers/irqchip/irq-gic.c                        | 118 ++++
 drivers/irqchip/irqchip.c                        |   3 +
 drivers/leds/leds-gpio.c                         |   1 +
 drivers/net/ethernet/amd/xgbe/xgbe-dev.c         |  16 +-
 drivers/net/ethernet/amd/xgbe/xgbe-drv.c         |   3 +
 drivers/net/ethernet/amd/xgbe/xgbe-main.c        | 276 ++++++--
 drivers/net/ethernet/amd/xgbe/xgbe-mdio.c        |  20 +-
 drivers/net/ethernet/amd/xgbe/xgbe-ptp.c         |   4 +-
 drivers/net/ethernet/amd/xgbe/xgbe.h             |  13 +
 drivers/net/ethernet/apm/xgene/xgene_enet_hw.c   |  69 +-
 drivers/net/ethernet/apm/xgene/xgene_enet_main.c |  80 ++-
 drivers/net/ethernet/apm/xgene/xgene_enet_main.h |   1 +
 drivers/net/ethernet/smsc/smc91x.c               |  10 +
 drivers/net/phy/amd-xgbe-phy.c                   | 777 ++++++++++++-----------
 drivers/pci/host/pci-xgene.c                     | 167 +++++
 drivers/pnp/resource.c                           |   2 +
 drivers/tty/Kconfig                              |   6 +
 drivers/tty/Makefile                             |   1 +
 drivers/tty/sbsauart.c                           | 358 +++++++++++
 drivers/tty/serial/8250/8250_dw.c                |   9 +
 drivers/virtio/virtio_mmio.c                     |  12 +-
 include/acpi/acpi_bus.h                          |   2 +
 include/acpi/acpi_io.h                           |   6 +
 include/asm-generic/vmlinux.lds.h                |   7 +
 include/kvm/arm_vgic.h                           |  20 +-
 include/linux/acpi.h                             |   1 +
 include/linux/clocksource.h                      |   6 +
 include/linux/irqchip/arm-gic-acpi.h             |  31 +
 include/linux/irqchip/arm-gic.h                  |   2 +
 include/linux/pci.h                              |  37 +-
 virt/kvm/arm/arch_timer.c                        | 107 ++--
 virt/kvm/arm/vgic-v2.c                           |  86 ++-
 virt/kvm/arm/vgic-v3.c                           |   8 +-
 virt/kvm/arm/vgic.c                              |  30 +-
 76 files changed, 4208 insertions(+), 626 deletions(-)

diff --git a/Documentation/arm64/arm-acpi.txt b/Documentation/arm64/arm-acpi.txt
new file mode 100644
index 0000000..17cf96d
--- /dev/null
+++ b/Documentation/arm64/arm-acpi.txt
@@ -0,0 +1,323 @@
+ACPI on ARMv8 Servers
+---------------------
+ACPI can be used for ARMv8 general purpose servers designed to follow
+the ARM SBSA (Server Base System Architecture) specification, currently 
+available to those with an ARM login at http://silver.arm.com.
+
+The ARMv8 kernel implements the reduced hardware model of ACPI version
+5.1 and its corresponding errata.  Links to the specification and all
+external documents it refers to are managed by the UEFI Forum.  The
+specification is available at http://www.uefi.org/specifications and
+external documents can be found via http://www.uefi.org/acpi.
+
+If an ARMv8 system does not meet the requirements of the SBSA, or cannot
+be described using the mechanisms defined in the required ACPI specifications,
+then it is likely that Device Tree (DT) is more suitable than ACPI for the
+hardware.
+
+
+Relationship with Device Tree
+-----------------------------
+ACPI support in drivers and subsystems for ARMv8 should never be mutually
+exclusive with DT support at compile time.
+
+At boot time the kernel will only use one description method depending on
+parameters passed from the bootloader (including kernel bootargs).
+
+Regardless of whether DT or ACPI is used, the kernel must always be capable
+of booting with either scheme (in kernels with both schemes enabled at compile
+time).
+
+When booting using ACPI tables, the /chosen node in DT will still be parsed
+to extract the kernel command line and initrd path.  No other section of the
+DT will be used.
+
+
+Booting using ACPI tables
+-------------------------
+The only defined method for passing ACPI tables to the kernel on ARMv8
+is via the UEFI system configuration table.
+
+Processing of ACPI tables may be disabled by passing acpi=off on the kernel
+command line; this is the default behavior.  If acpi=force is used, the kernel
+will ONLY use device configuration information contained in the ACPI tables.
+
+In order for the kernel to load and use ACPI tables, the UEFI implementation
+MUST set the ACPI_20_TABLE_GUID to point to the RSDP table (the table with
+the ACPI signature "RSD PTR ").  If this pointer is incorrect and acpi=force
+is used, the kernel will disable ACPI and try to use DT to boot.
+
+If the pointer to the RSDP table is correct, the table will be mapped into
+the kernel by the ACPI core, using the address provided by UEFI.
+
+The ACPI core will then locate and map in all other ACPI tables provided by
+using the addresses in the RSDP table to find the XSDT (eXtended System 
+Description Table).  The XSDT in turn provides the addresses to all other
+ACPI tables provided by the system firmware; the ACPI core will then traverse
+this table and map in the tables listed.
+
+The ACPI core will ignore any provided RSDT (Root System Description Table).
+RSDTs have been deprecated and are ignored on arm64 since they only allow 
+for 32-bit addresses.
+
+Further, the ACPI core will only use the 64-bit address fields in the FADT
+(Fixed ACPI Description Table).  Any 32-bit address fields in the FADT will
+be ignored on arm64.
+
+Hardware reduced mode (see Section 4.1 of the ACPI 5.1 specification) will
+be enforced by the ACPI core on arm64.  Doing so allows the ACPI core to
+run less complex code since it no longer has to provide support for legacy
+hardware from other architectures.
+
+For the ACPI core to operate properly, and in turn provide the information
+the kernel needs to configure devices, it expects to find the following
+tables (all section numbers refer to the ACPI 5.1 specfication):
+
+    -- RSDP (Root System Description Pointer), section 5.2.5
+
+    -- XSDT (eXtended System Description Table), section 5.2.8
+
+    -- FACS (Firmware ACPI Control Structure), section 5.2.10
+
+    -- FADT (Fixed ACPI Description Table), section 5.2.9
+
+    -- DSDT (Differentiated System Description Table), section
+       5.2.11.1
+
+    -- MADT (Multiple APIC Description Table), section 5.2.12
+
+    -- GTDT (Generic Timer Description Table), section 5.2.24
+
+    -- If PCI is supported, the MCFG (Memory mapped ConFiGuration
+       Table), section 5.2.6, specifically Table 5-31.
+
+If the above tables are not all present, the kernel may or may not be
+able to boot properly since it may not be able to configure all of the
+devices available.
+
+
+ACPI Detection
+--------------
+Drivers should determine their probe() type by checking for a null
+value for ACPI_HANDLE, or checking .of_node, or other information in
+the device structure.  This is detailed further in the "Driver 
+Recommendations" section.
+
+In non-driver code, if the presence of ACPI needs to be detected at
+runtime, then check the value of acpi_disabled. If CONFIG_ACPI is not
+set, acpi_disabled will always be 1.
+
+
+Device Enumeration
+------------------
+Device descriptions in ACPI should use standard recognized ACPI interfaces.
+These can contain less information than is typically provided via a Device
+Tree description for the same device.  This is also one of the reasons that
+ACPI can be useful -- the driver takes into account that it may have less
+detailed information about the device and uses sensible defaults instead.
+If done properly in the driver, the hardware can change and improve over
+time without the driver having to change at all.
+
+Clocks provide an excellent example.  In DT, clocks need to be specified
+and the drivers need to take them into account.  In ACPI, the assumption
+is that UEFI will leave the device in a reasonable default state, including
+any clock settings.  If for some reason the driver needs to change a clock
+value, this can be done in an ACPI method; all the driver needs to do is
+invoke the method and not concern itself with what the method needs to do
+to change the clock.  Changing the hardware can then take place over time
+by changing what the ACPI method does, and not the driver.
+
+ACPI drivers should only look at one specific ASL object -- the _DSD object
+-- for device driver parameters (known in DT as "bindings", or "Device 
+Properties" in ACPI).  Not all DT bindings will be recognized.  The UEFI
+Forum provides a mechanism for registering such bindings [URL TBD by ASWG]
+so that they may be used on any operating system supporting ACPI.  Device
+properties that have not been registered with the UEFI Forum should not be
+used.
+
+Drivers should look for device properties in the _DSD object ONLY; the _DSD
+object is described in the ACPI specification section 6.2.5, but more
+specifically, use the _DSD Device Properties UUID:
+
+   -- UUID: daffd814-6eba-4d8c-8a91-bc9bbf4aa301
+   
+   -- http://www.uefi.org/sites/default/files/resources/_DSD-device-properties-UUID.pdf)
+
+The kernel has an interface for looking up device properties in a manner 
+independent of whether DT or ACPI is being used and that interface should
+be used; it can eliminate some duplication of code paths in driver probing
+functions and discourage divergence between DT bindings and ACPI device
+properties.
+
+ACPI tables are described with a formal language called ASL, the ACPI
+Source Language (section 19 of the specification).  This means that there
+are always multiple ways to describe the same thing -- including device
+properties.  For example, device properties could use an ASL construct
+that looks like this: Name(KEY0, "value0").  An ACPI device driver would
+then retrieve the value of the property by evaluating the KEY0 object.
+However, using Name() this way has multiple problems: (1) ACPI limits
+names ("KEY0") to four characters unlike DT; (2) there is no industry
+wide registry that maintains a list of names, minimzing re-use; (3)
+there is also no registry for the definition of property values ("value0"),
+again making re-use difficult; and (4) how does one maintain backward
+compatibility as new hardware comes out?  The _DSD method was created
+to solve precisely these sorts of problems; Linux drivers should ALWAYS
+use the _DSD method for device properties and nothing else.
+
+The _DSM object (ACPI Section 9.14.1) could also be used for conveying
+device properties to a driver.  Linux drivers should only expect it to
+be used if _DSD cannot represent the data required, and there is no way
+to create a new UUID for the _DSD object.  Note that there is even less
+regulation of the use of _DSM than there is of _DSD.  Drivers that depend
+on the contents of _DSM objects will be more difficult to maintain over
+time because of this.
+
+The _DSD object is a very flexible mechanism in ACPI, as are the registered
+Device Properties.  This flexibility allows _DSD to cover more than just the
+generic server case and care should be taken in device drivers not to expect
+it to replicate highly specific embedded behaviour from DT.
+
+Both DT bindings and ACPI device properties for device drivers have review
+processes.  Use them.  And, before creating new device properties, check to
+be sure that they have not been defined before and either registered in the
+Linux kernel documentation or the UEFI Forum.  If the device drivers supports
+ACPI and DT, please make sure the device properties are consistent in both
+places.
+
+
+Programmable Power Control Resources
+------------------------------------
+Programmable power control resources include such resources as voltage/current
+providers (regulators) and clock sources.
+
+The kernel assumes that power control of these resources is represented with
+Power Resource Objects (ACPI section 7.1).  The ACPI core will then handle
+correctly enabling and disabling resources as they are needed.  In order to
+get that to work, ACPI assumes each device has defined D-states and that these
+can be controlled through the optional ACPI methods _PS0, _PS1, _PS2, and _PS3;
+in ACPI, _PS0 is the method to invoke to turn a device full on, and _PS3 is for
+turning a device full off.
+
+The kernel ACPI code will also assume that the _PS? methods follow the normal
+ACPI rules for such methods:
+
+   -- If either _PS0 or _PS3 is implemented, then the other method must also
+      be implemented.
+
+   -- If a device requires usage or setup of a power resource when on, the ASL
+      should organize that it is allocated/enabled using the _PS0 method.
+
+   -- Resources allocated or enabled in the _PS0 method should be disabled
+      or de-allocated in the _PS3 method.
+
+   -- Firmware will leave the resources in a reasonable state before handing
+      over control to the kernel.
+
+Such code in _PS? methods will of course be very platform specific.  But,
+this allows the driver to abstract out the interface for operating the device
+and avoid having to read special non-standard values from ACPI tables. Further,
+abstracting the use of these resources allows the hardware to change over time
+without requiring updates to the driver.
+
+
+Clocks
+------
+ACPI makes the assumption that clocks are initialized by the firmware -- 
+UEFI, in this case -- to some working value before control is handed over
+to the kernel.  This has implications for devices such as UARTs, or SoC
+driven LCD displays, for example.
+
+When the kernel boots, the clock is assumed to be set to reasonable
+working value.  If for some reason the frequency needs to change -- e.g.,
+throttling for power management -- the device driver should expect that 
+process to be abstracted out into some ACPI method that can be invoked 
+(please see the ACPI specification for further recommendations on standard
+methods to be expected).  If is not, there is no direct way for ACPI to
+control the clocks.
+
+
+Driver Recommendations
+----------------------
+DO NOT remove any DT handling when adding ACPI support for a driver.  The
+same device may be used on many different systems.
+
+DO try to structure the driver so that it is data driven.  That is, set up
+a struct containing internal per-device state based on defaults and whatever
+else must be discovered by the driver probe function.  Then, have the rest
+of the driver operate off of the contents of that struct.  Doing so should
+allow most divergence between ACPI and DT functionality to be kept local to
+the probe function instead of being scattered throughout the driver.  For
+example:
+
+static int device_probe_dt(struct platform_device *pdev)
+{
+	/* DT specific functionality */
+	...
+}
+
+static int device_probe_acpi(struct platform_device *pdev)
+{
+	/* ACPI specific functionality */
+	...
+}
+
+static int device_probe(stuct platform_device *pdev)
+{
+	...
+	struct device_node node = pdev->dev.of_node;
+	...
+
+	if (node)
+		ret = device_probe_dt(pdev);
+	else if (ACPI_HANDLE(&pdev->dev))
+		ret = device_probe_acpi(pdev);
+	else
+		/* other initialization */
+		...
+	/* Continue with any generic probe operations */
+	...
+}
+
+DO keep the MODULE_DEVICE_TABLE entries together in the driver to make it
+clear the different names the driver is probed for, both from DT and from
+ACPI:
+
+static struct of_device_id virtio_mmio_match[] = {
+        { .compatible = "virtio,mmio", },
+        { }
+};
+MODULE_DEVICE_TABLE(of, virtio_mmio_match);
+
+static const struct acpi_device_id virtio_mmio_acpi_match[] = {
+        { "LNRO0005", },
+        { }
+};
+MODULE_DEVICE_TABLE(acpi, virtio_mmio_acpi_match);
+
+
+ASWG
+----
+The following areas are not yet fully defined for ARM in the 5.1 version
+of the ACPI specification and are expected to be worked through in the 
+UEFI ACPI Specification Working Group (ASWG):
+
+   -- ACPI based CPU topology
+   -- ACPI based Power management
+   -- CPU idle control based on PSCI
+   -- CPU performance control (CPPC)
+   -- ACPI based SMMU
+   -- ITS support for GIC in MADT
+
+Participation in this group is open to all UEFI members.  Please see
+http://www.uefi.org/workinggroup for details on group membership.
+
+It is the intent of the ARMv8 ACPI kernel code to follow the ACPI specification
+as closely as possible, and to only implement functionality that complies with
+the released standards from UEFI ASWG.  As a practical matter, there will be
+vendors that provide bad ACPI tables or violate the standards in some way.
+If this is because of errors, quirks and fixups may be necessary, but will
+be avoided if possible.  If there are features missing from ACPI that preclude
+it from being used on a platform, ECRs (Engineering Change Requests) should be
+submitted to ASWG and go through the normal approval process; for those that
+are not UEFI members, many other members of the Linux community are and would
+likely be willing to assist in submitting ECRs.
diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt
index 4df73da..4adfd50 100644
--- a/Documentation/kernel-parameters.txt
+++ b/Documentation/kernel-parameters.txt
@@ -165,7 +165,7 @@ multipliers 'Kilo', 'Mega', and 'Giga', equalling 2^10, 2^20, and 2^30
 bytes respectively. Such letter suffixes can also be entirely omitted.
 
 
-	acpi=		[HW,ACPI,X86]
+	acpi=		[HW,ACPI,X86,ARM64]
 			Advanced Configuration and Power Interface
 			Format: { force | off | strict | noirq | rsdt }
 			force -- enable ACPI if default was off
@@ -175,6 +175,7 @@ bytes respectively. Such letter suffixes can also be entirely omitted.
 				strictly ACPI specification compliant.
 			rsdt -- prefer RSDT over (default) XSDT
 			copy_dsdt -- copy DSDT to memory
+			For ARM64, ONLY "acpi=off" or "acpi=force" are available
 
 			See also Documentation/power/runtime_pm.txt, pci=noacpi
 
diff --git a/arch/arm/kvm/mmu.c b/arch/arm/kvm/mmu.c
index 1dc9778..0b88d36 100644
--- a/arch/arm/kvm/mmu.c
+++ b/arch/arm/kvm/mmu.c
@@ -1315,6 +1315,10 @@ int kvm_arch_prepare_memory_region(struct kvm *kvm,
 	    (KVM_PHYS_SIZE >> PAGE_SHIFT))
 		return -EFAULT;
 
+	spin_lock(&kvm->mmu_lock);
+	stage2_flush_memslot(kvm, memslot);
+	spin_unlock(&kvm->mmu_lock);
+
 	/*
 	 * A memory region could potentially cover multiple VMAs, and any holes
 	 * between them, so iterate over all of them to find out if we can map
diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig
index b1f9a20..d60e537 100644
--- a/arch/arm64/Kconfig
+++ b/arch/arm64/Kconfig
@@ -5,6 +5,7 @@ config ARM64
 	select ARCH_HAS_GCOV_PROFILE_ALL
 	select ARCH_HAS_SG_CHAIN
 	select ARCH_HAS_TICK_BROADCAST if GENERIC_CLOCKEVENTS_BROADCAST
+	select ACPI_REDUCED_HARDWARE_ONLY if ACPI
 	select ARCH_USE_CMPXCHG_LOCKREF
 	select ARCH_SUPPORTS_ATOMIC_RMW
 	select ARCH_WANT_OPTIONAL_GPIOLIB
@@ -193,6 +194,9 @@ config PCI_DOMAINS_GENERIC
 config PCI_SYSCALL
 	def_bool PCI
 
+config PCI_MMCONFIG
+	def_bool y if PCI && ACPI
+
 source "drivers/pci/Kconfig"
 source "drivers/pci/pcie/Kconfig"
 source "drivers/pci/hotplug/Kconfig"
@@ -384,6 +388,9 @@ config SMP
 
 	  If you don't know what to do here, say N.
 
+config ARM_PARKING_PROTOCOL
+	def_bool y if SMP
+
 config SCHED_MC
 	bool "Multi-core scheduler support"
 	depends on SMP
@@ -646,6 +653,8 @@ source "drivers/Kconfig"
 
 source "drivers/firmware/Kconfig"
 
+source "drivers/acpi/Kconfig"
+
 source "fs/Kconfig"
 
 source "arch/arm64/kvm/Kconfig"
diff --git a/arch/arm64/Makefile b/arch/arm64/Makefile
index 1c43cec..ab3b0b1 100644
--- a/arch/arm64/Makefile
+++ b/arch/arm64/Makefile
@@ -49,6 +49,7 @@ core-$(CONFIG_NET) += arch/arm64/net/
 core-$(CONFIG_KVM) += arch/arm64/kvm/
 core-$(CONFIG_XEN) += arch/arm64/xen/
 core-$(CONFIG_CRYPTO) += arch/arm64/crypto/
+drivers-$(CONFIG_PCI)	+= arch/arm64/pci/
 libs-y		:= arch/arm64/lib/ $(libs-y)
 libs-y		+= $(LIBGCC)
 libs-$(CONFIG_EFI_STUB) += drivers/firmware/efi/libstub/
diff --git a/arch/arm64/include/asm/acenv.h b/arch/arm64/include/asm/acenv.h
new file mode 100644
index 0000000..b49166f
--- /dev/null
+++ b/arch/arm64/include/asm/acenv.h
@@ -0,0 +1,18 @@
+/*
+ * ARM64 specific ACPICA environments and implementation
+ *
+ * Copyright (C) 2014, Linaro Ltd.
+ *   Author: Hanjun Guo <hanjun.guo@linaro.org>
+ *   Author: Graeme Gregory <graeme.gregory@linaro.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#ifndef _ASM_ACENV_H
+#define _ASM_ACENV_H
+
+/* It is required unconditionally by ACPI core, update it when needed. */
+
+#endif /* _ASM_ACENV_H */
diff --git a/arch/arm64/include/asm/acpi.h b/arch/arm64/include/asm/acpi.h
new file mode 100644
index 0000000..6e692f4
--- /dev/null
+++ b/arch/arm64/include/asm/acpi.h
@@ -0,0 +1,102 @@
+/*
+ *  Copyright (C) 2013-2014, Linaro Ltd.
+ *	Author: Al Stone <al.stone@linaro.org>
+ *	Author: Graeme Gregory <graeme.gregory@linaro.org>
+ *	Author: Hanjun Guo <hanjun.guo@linaro.org>
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License version 2 as
+ *  published by the Free Software Foundation;
+ */
+
+#ifndef _ASM_ACPI_H
+#define _ASM_ACPI_H
+
+#include <asm/smp_plat.h>
+
+/* Basic configuration for ACPI */
+#ifdef	CONFIG_ACPI
+#define acpi_strict 1	/* No out-of-spec workarounds on ARM64 */
+extern int acpi_disabled;
+extern int acpi_noirq;
+extern int acpi_pci_disabled;
+
+/* 1 to indicate PSCI 0.2+ is implemented */
+static inline bool acpi_psci_present(void)
+{
+	return acpi_gbl_FADT.arm_boot_flags & ACPI_FADT_PSCI_COMPLIANT;
+}
+
+/* 1 to indicate HVC must be used instead of SMC as the PSCI conduit */
+static inline bool acpi_psci_use_hvc(void)
+{
+	return acpi_gbl_FADT.arm_boot_flags & ACPI_FADT_PSCI_USE_HVC;
+}
+
+static inline void disable_acpi(void)
+{
+	acpi_disabled = 1;
+	acpi_pci_disabled = 1;
+	acpi_noirq = 1;
+}
+
+static inline void enable_acpi(void)
+{
+	acpi_disabled = 0;
+	acpi_pci_disabled = 0;
+	acpi_noirq = 0;
+}
+
+/* MPIDR value provided in GICC structure is 64 bits, but the
+ * existing apic_id (CPU hardware ID) using in acpi processor
+ * driver is 32-bit, to conform to the same datatype we need
+ * to repack the GICC structure MPIDR.
+ *
+ * Only 32 bits of MPIDR are used:
+ * 
+ * Bits [0:7] Aff0;
+ * Bits [8:15] Aff1;
+ * Bits [16:23] Aff2;
+ * Bits [32:39] Aff3;
+ */
+static inline u32 pack_mpidr(u64 mpidr)
+{
+	return (u32) ((mpidr & 0xff00000000) >> 8) | mpidr;
+}
+
+/*
+ * The ACPI processor driver for ACPI core code needs this macro
+ * to find out this cpu was already mapped (mapping from CPU hardware
+ * ID to CPU logical ID) or not.
+ *
+ * cpu_logical_map(cpu) is the mapping of MPIDR and the logical cpu,
+ * and MPIDR is the cpu hardware ID we needed to pack.
+ */
+#define cpu_physical_id(cpu) pack_mpidr(cpu_logical_map(cpu))
+
+/*
+ * It's used from ACPI core in kdump to boot UP system with SMP kernel,
+ * with this check the ACPI core will not override the CPU index
+ * obtained from GICC with 0 and not print some error message as well.
+ * Since MADT must provide at least one GICC structure for GIC
+ * initialization, CPU will be always available in MADT on ARM64.
+ */
+static inline bool acpi_has_cpu_in_madt(void)
+{
+	return true;
+}
+
+static inline void arch_fix_phys_package_id(int num, u32 slot) { }
+void __init acpi_smp_init_cpus(void);
+
+extern int acpi_get_cpu_parked_address(int cpu, u64 *addr);
+
+#else
+static inline void disable_acpi(void) { }
+static inline bool acpi_psci_present(void) { return false; }
+static inline bool acpi_psci_use_hvc(void) { return false; }
+static inline void acpi_smp_init_cpus(void) { }
+static inline int  acpi_get_cpu_parked_address(int cpu, u64 *addr) { return  -EOPNOTSUPP; }
+#endif /* CONFIG_ACPI */
+
+#endif /*_ASM_ACPI_H*/
diff --git a/arch/arm64/include/asm/cpu_ops.h b/arch/arm64/include/asm/cpu_ops.h
index 6f8e2ef..978f567 100644
--- a/arch/arm64/include/asm/cpu_ops.h
+++ b/arch/arm64/include/asm/cpu_ops.h
@@ -64,6 +64,7 @@ struct cpu_operations {
 };
 
 extern const struct cpu_operations *cpu_ops[NR_CPUS];
+const struct cpu_operations *cpu_get_ops(const char *name);
 int __init cpu_read_ops(struct device_node *dn, int cpu);
 void __init cpu_read_bootcpu_ops(void);
 
diff --git a/arch/arm64/include/asm/elf.h b/arch/arm64/include/asm/elf.h
index 1f65be3..c0f89a0 100644
--- a/arch/arm64/include/asm/elf.h
+++ b/arch/arm64/include/asm/elf.h
@@ -114,7 +114,8 @@ typedef struct user_fpsimd_state elf_fpregset_t;
  */
 #define elf_check_arch(x)		((x)->e_machine == EM_AARCH64)
 
-#define elf_read_implies_exec(ex,stk)	(stk != EXSTACK_DISABLE_X)
+#define elf_read_implies_exec(ex,stk)	(test_thread_flag(TIF_32BIT) \
+					 ? (stk == EXSTACK_ENABLE_X) : 0)
 
 #define CORE_DUMP_USE_REGSET
 #define ELF_EXEC_PAGESIZE	PAGE_SIZE
diff --git a/arch/arm64/include/asm/pci.h b/arch/arm64/include/asm/pci.h
index 872ba93..2f287a6 100644
--- a/arch/arm64/include/asm/pci.h
+++ b/arch/arm64/include/asm/pci.h
@@ -33,5 +33,56 @@ static inline int pci_proc_domain(struct pci_bus *bus)
 }
 #endif  /* CONFIG_PCI */
 
+/* "PCI MMCONFIG %04x [bus %02x-%02x]" */
+#define PCI_MMCFG_RESOURCE_NAME_LEN (22 + 4 + 2 + 2)
+
+#define PCI_MMCFG_BUS_OFFSET(bus)      ((bus) << 20)
+
+struct acpi_device;
+
+struct pci_sysdata {
+	int		domain;		/* PCI domain */
+	int		node;		/* NUMA node */
+	struct acpi_device *companion;	/* ACPI companion device */
+	void		*iommu;		/* IOMMU private data */
+};
+
+struct acpi_pci_root;
+struct pci_mmcfg_region;
+
+typedef int (*acpi_mcfg_fixup_t)(struct acpi_pci_root *root,
+				 struct pci_mmcfg_region *cfg);
+
+struct pci_mmcfg_region {
+	struct list_head list;
+	struct resource res;
+	int (*read)(struct pci_mmcfg_region *cfg, unsigned int bus,
+		    unsigned int devfn, int reg, int len, u32 *value);
+	int (*write)(struct pci_mmcfg_region *cfg, unsigned int bus,
+		     unsigned int devfn, int reg, int len, u32 value);
+	acpi_mcfg_fixup_t fixup;
+	void *data;
+	u64 address;
+	char __iomem *virt;
+	u16 segment;
+	u8 start_bus;
+	u8 end_bus;
+	char name[PCI_MMCFG_RESOURCE_NAME_LEN];
+};
+
+struct acpi_mcfg_fixup {
+	char oem_id[7];
+	char oem_table_id[9];
+	acpi_mcfg_fixup_t hook;
+};
+
+/* Designate a routine to fix up buggy MCFG */
+#define DECLARE_ACPI_MCFG_FIXUP(oem_id, table_id, hook)	\
+	static const struct acpi_mcfg_fixup __acpi_fixup_##hook __used	\
+	__attribute__((__section__(".acpi_fixup_mcfg"), aligned((sizeof(void *))))) \
+	= { {oem_id}, {table_id}, hook };
+
+extern struct pci_mmcfg_region *pci_mmconfig_lookup(int segment, int bus);
+
 #endif  /* __KERNEL__ */
 #endif  /* __ASM_PCI_H */
diff --git a/arch/arm64/include/asm/psci.h b/arch/arm64/include/asm/psci.h
index e5312ea..2454bc5 100644
--- a/arch/arm64/include/asm/psci.h
+++ b/arch/arm64/include/asm/psci.h
@@ -14,6 +14,7 @@
 #ifndef __ASM_PSCI_H
 #define __ASM_PSCI_H
 
-int psci_init(void);
+int psci_dt_init(void);
+int psci_acpi_init(void);
 
 #endif /* __ASM_PSCI_H */
diff --git a/arch/arm64/include/asm/smp.h b/arch/arm64/include/asm/smp.h
index 780f82c..3411561 100644
--- a/arch/arm64/include/asm/smp.h
+++ b/arch/arm64/include/asm/smp.h
@@ -39,9 +39,10 @@ extern void show_ipi_list(struct seq_file *p, int prec);
 extern void handle_IPI(int ipinr, struct pt_regs *regs);
 
 /*
- * Setup the set of possible CPUs (via set_cpu_possible)
+ * Discover the set of possible CPUs and determine their
+ * SMP operations.
  */
-extern void smp_init_cpus(void);
+extern void of_smp_init_cpus(void);
 
 /*
  * Provide a function to raise an IPI cross call on CPUs in callmap.
@@ -51,6 +52,11 @@ extern void set_smp_cross_call(void (*)(const struct cpumask *, unsigned int));
 extern void (*__smp_cross_call)(const struct cpumask *, unsigned int);
 
 /*
+ * Provide a function to signal a parked secondary CPU.
+ */
+extern void set_smp_boot_wakeup_call(void (*)(int cpu));
+
+/*
  * Called from the secondary holding pen, this is the secondary CPU entry point.
  */
 asmlinkage void secondary_start_kernel(void);
diff --git a/arch/arm64/kernel/Makefile b/arch/arm64/kernel/Makefile
index eaa77ed..63ffe3c 100644
--- a/arch/arm64/kernel/Makefile
+++ b/arch/arm64/kernel/Makefile
@@ -23,7 +23,8 @@ arm64-obj-$(CONFIG_COMPAT)		+= sys32.o kuser32.o signal32.o 	\
 					   ../../arm/kernel/opcodes.o
 arm64-obj-$(CONFIG_FUNCTION_TRACER)	+= ftrace.o entry-ftrace.o
 arm64-obj-$(CONFIG_MODULES)		+= arm64ksyms.o module.o
-arm64-obj-$(CONFIG_SMP)			+= smp.o smp_spin_table.o topology.o
+arm64-obj-$(CONFIG_SMP)			+= smp.o smp_spin_table.o topology.o \
+					   smp_parking_protocol.o
 arm64-obj-$(CONFIG_PERF_EVENTS)		+= perf_regs.o
 arm64-obj-$(CONFIG_HW_PERF_EVENTS)	+= perf_event.o
 arm64-obj-$(CONFIG_HAVE_HW_BREAKPOINT)	+= hw_breakpoint.o
@@ -33,6 +34,7 @@ arm64-obj-$(CONFIG_JUMP_LABEL)		+= jump_label.o
 arm64-obj-$(CONFIG_KGDB)		+= kgdb.o
 arm64-obj-$(CONFIG_EFI)			+= efi.o efi-stub.o efi-entry.o
 arm64-obj-$(CONFIG_PCI)			+= pci.o
+arm64-obj-$(CONFIG_ACPI)		+= acpi.o
 arm64-obj-$(CONFIG_ARMV8_DEPRECATED)	+= armv8_deprecated.o
 
 obj-y					+= $(arm64-obj-y) vdso/
diff --git a/arch/arm64/kernel/acpi.c b/arch/arm64/kernel/acpi.c
new file mode 100644
index 0000000..06a96be
--- /dev/null
+++ b/arch/arm64/kernel/acpi.c
@@ -0,0 +1,398 @@
+/*
+ *  ARM64 Specific Low-Level ACPI Boot Support
+ *
+ *  Copyright (C) 2013-2014, Linaro Ltd.
+ *	Author: Al Stone <al.stone@linaro.org>
+ *	Author: Graeme Gregory <graeme.gregory@linaro.org>
+ *	Author: Hanjun Guo <hanjun.guo@linaro.org>
+ *	Author: Tomasz Nowicki <tomasz.nowicki@linaro.org>
+ *	Author: Naresh Bhat <naresh.bhat@linaro.org>
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License version 2 as
+ *  published by the Free Software Foundation.
+ */
+
+#define pr_fmt(fmt) "ACPI: " fmt
+
+#include <linux/init.h>
+#include <linux/acpi.h>
+#include <linux/cpumask.h>
+#include <linux/memblock.h>
+#include <linux/irq.h>
+#include <linux/irqdomain.h>
+#include <linux/bootmem.h>
+#include <linux/smp.h>
+#include <linux/irqchip/arm-gic-acpi.h>
+
+#include <asm/cputype.h>
+#include <asm/cpu_ops.h>
+
+int acpi_noirq;			/* skip ACPI IRQ initialization */
+int acpi_disabled;
+EXPORT_SYMBOL(acpi_disabled);
+
+int acpi_pci_disabled;		/* skip ACPI PCI scan and IRQ initialization */
+EXPORT_SYMBOL(acpi_pci_disabled);
+
+static int enabled_cpus;	/* Processors (GICC) with enabled flag in MADT */
+
+static char *boot_method;
+static u64 parked_address[NR_CPUS];
+
+/*
+ * Since we're on ARM, the default interrupt routing model
+ * clearly has to be GIC.
+ */
+enum acpi_irq_model_id acpi_irq_model = ACPI_IRQ_MODEL_GIC;
+
+/*
+ * __acpi_map_table() will be called before page_init(), so early_ioremap()
+ * or early_memremap() should be called here to for ACPI table mapping.
+ */
+char *__init __acpi_map_table(unsigned long phys, unsigned long size)
+{
+	if (!phys || !size)
+		return NULL;
+
+	return early_memremap(phys, size);
+}
+
+void __init __acpi_unmap_table(char *map, unsigned long size)
+{
+	if (!map || !size)
+		return;
+
+	early_memunmap(map, size);
+}
+
+/**
+ * acpi_map_gic_cpu_interface - generates a logical cpu number
+ * and map to MPIDR represented by GICC structure
+ * @mpidr: CPU's hardware id to register, MPIDR represented in MADT
+ * @enabled: this cpu is enabled or not
+ *
+ * Returns the logical cpu number which maps to MPIDR
+ */
+static int acpi_map_gic_cpu_interface(u64 mpidr, u64 parked_addr, u8 enabled)
+{
+	int cpu;
+
+	if (mpidr == INVALID_HWID) {
+		pr_info("Skip MADT cpu entry with invalid MPIDR\n");
+		return -EINVAL;
+	}
+
+	total_cpus++;
+	if (!enabled)
+		return -EINVAL;
+
+	if (enabled_cpus >=  NR_CPUS) {
+		pr_warn("NR_CPUS limit of %d reached, Processor %d/0x%llx ignored.\n",
+			NR_CPUS, total_cpus, mpidr);
+		return -EINVAL;
+	}
+
+	/* No need to check duplicate MPIDRs for the first CPU */
+	if (enabled_cpus) {
+		/*
+		 * Duplicate MPIDRs are a recipe for disaster. Scan
+		 * all initialized entries and check for
+		 * duplicates. If any is found just ignore the CPU.
+		 */
+		for_each_possible_cpu(cpu) {
+			if (cpu_logical_map(cpu) == mpidr) {
+				pr_err("Firmware bug, duplicate CPU MPIDR: 0x%llx in MADT\n",
+				       mpidr);
+				return -EINVAL;
+			}
+		}
+		
+		/* allocate a logical cpu id for the new comer */
+		cpu = cpumask_next_zero(-1, cpu_possible_mask);
+	} else {
+		/*
+		 * First GICC entry must be BSP as ACPI spec said
+		 * in section 5.2.12.15
+		 */
+		if  (cpu_logical_map(0) != mpidr) {
+			pr_err("First GICC entry with MPIDR 0x%llx is not BSP\n",
+			       mpidr);
+			return -EINVAL;
+		}
+
+		/*
+		 * boot_cpu_init() already hold bit 0 in cpu_present_mask
+		 * for BSP, no need to allocate again.
+		 */
+		cpu = 0;
+	}
+
+	parked_address[cpu] = parked_addr;
+
+	/* CPU 0 was already initialized */
+	if (cpu) {
+		cpu_ops[cpu] = cpu_get_ops(boot_method);
+		if (!cpu_ops[cpu])
+			return -EINVAL;
+
+		if (cpu_ops[cpu]->cpu_init(NULL, cpu))
+			return -EOPNOTSUPP;
+
+		/* map the logical cpu id to cpu MPIDR */
+		cpu_logical_map(cpu) = mpidr;
+
+		set_cpu_possible(cpu, true);
+	} else {
+		/* get cpu0's ops, no need to return if ops is null */
+		cpu_ops[0] = cpu_get_ops(boot_method);
+	}
+
+	enabled_cpus++;
+	return cpu;
+}
+
+static int __init
+acpi_parse_gic_cpu_interface(struct acpi_subtable_header *header,
+				const unsigned long end)
+{
+	struct acpi_madt_generic_interrupt *processor;
+
+	processor = (struct acpi_madt_generic_interrupt *)header;
+
+	if (BAD_MADT_ENTRY(processor, end))
+		return -EINVAL;
+
+	acpi_table_print_madt_entry(header);
+
+	acpi_map_gic_cpu_interface(processor->arm_mpidr & MPIDR_HWID_BITMASK,
+		processor->parked_address, processor->flags & ACPI_MADT_ENABLED);
+
+	return 0;
+}
+
+/* Parse GIC cpu interface entries in MADT for SMP init */
+void __init acpi_smp_init_cpus(void)
+{
+	int count;
+
+	/*
+	 * do a partial walk of MADT to determine how many CPUs
+	 * we have including disabled CPUs, and get information
+	 * we need for SMP init
+	 */
+	count = acpi_table_parse_madt(ACPI_MADT_TYPE_GENERIC_INTERRUPT,
+			acpi_parse_gic_cpu_interface, 0);
+
+	if (!count) {
+		pr_err("No GIC CPU interface entries present\n");
+		return;
+	} else if (count < 0) {
+		pr_err("Error parsing GIC CPU interface entry\n");
+		return;
+	}
+
+	/* Make boot-up look pretty */
+	pr_info("%d CPUs enabled, %d CPUs total\n", enabled_cpus, total_cpus);
+}
+
+int acpi_gsi_to_irq(u32 gsi, unsigned int *irq)
+{
+	*irq = irq_find_mapping(NULL, gsi);
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(acpi_gsi_to_irq);
+
+/*
+ * success: return IRQ number (>0)
+ * failure: return =< 0
+ */
+int acpi_register_gsi(struct device *dev, u32 gsi, int trigger, int polarity)
+{
+	unsigned int irq;
+	unsigned int irq_type;
+
+	/*
+	 * ACPI have no bindings to indicate SPI or PPI, so we
+	 * use different mappings from DT in ACPI.
+	 *
+	 * For FDT
+	 * PPI interrupt: in the range [0, 15];
+	 * SPI interrupt: in the range [0, 987];
+	 *
+	 * For ACPI, GSI should be unique so using
+	 * the hwirq directly for the mapping:
+	 * PPI interrupt: in the range [16, 31];
+	 * SPI interrupt: in the range [32, 1019];
+	 */
+
+	if (trigger == ACPI_EDGE_SENSITIVE &&
+				polarity == ACPI_ACTIVE_LOW)
+		irq_type = IRQ_TYPE_EDGE_FALLING;
+	else if (trigger == ACPI_EDGE_SENSITIVE &&
+				polarity == ACPI_ACTIVE_HIGH)
+		irq_type = IRQ_TYPE_EDGE_RISING;
+	else if (trigger == ACPI_LEVEL_SENSITIVE &&
+				polarity == ACPI_ACTIVE_LOW)
+		irq_type = IRQ_TYPE_LEVEL_LOW;
+	else if (trigger == ACPI_LEVEL_SENSITIVE &&
+				polarity == ACPI_ACTIVE_HIGH)
+		irq_type = IRQ_TYPE_LEVEL_HIGH;
+	else
+		irq_type = IRQ_TYPE_NONE;
+
+	/*
+	 * Since only one GIC is supported in ACPI 5.0, we can
+	 * create mapping refer to the default domain
+	 */
+	irq = irq_create_mapping(NULL, gsi);
+	if (!irq)
+		return irq;
+
+	/* Set irq type if specified and different than the current one */
+	if (irq_type != IRQ_TYPE_NONE &&
+		irq_type != irq_get_trigger_type(irq))
+		irq_set_irq_type(irq, irq_type);
+	return irq;
+}
+EXPORT_SYMBOL_GPL(acpi_register_gsi);
+
+void acpi_unregister_gsi(u32 gsi)
+{
+}
+EXPORT_SYMBOL_GPL(acpi_unregister_gsi);
+
+static int __init acpi_parse_fadt(struct acpi_table_header *table)
+{
+	struct acpi_table_fadt *fadt = (struct acpi_table_fadt *)table;
+
+	/*
+	 * Revision in table header is the FADT Major revision,
+	 * and there is a minor revision of FADT which was introduced
+	 * by ACPI 5.1, we only deal with ACPI 5.1 or newer revision
+	 * to get arm boot flags, or we will disable ACPI.
+	 */
+	if (table->revision > 5 ||
+	    (table->revision == 5 && fadt->minor_revision >= 1)) {
+		/*
+		 * ACPI 5.1 only has two explicit methods to boot up SMP,
+		 * PSCI and Parking protocol, but the Parking protocol is
+		 * only specified for ARMv7 now, so make PSCI as the only
+		 * way for the SMP boot protocol before some updates for
+		 * the ACPI spec or the Parking protocol spec.
+		 */
+		if (acpi_psci_present())
+			boot_method = "psci";
+		else if (IS_ENABLED(CONFIG_ARM_PARKING_PROTOCOL))
+			boot_method = "parking-protocol";
+
+		if (!boot_method)
+			pr_warn("No boot method, will not bring up secondary CPUs\n");
+		return -EOPNOTSUPP;
+	}
+
+	pr_warn("Unsupported FADT revision %d.%d, should be 5.1+, will disable ACPI\n",
+		table->revision, fadt->minor_revision);
+	disable_acpi();
+
+	return -EINVAL;
+}
+
+/*
+ * acpi_boot_table_init() called from setup_arch(), always.
+ *	1. find RSDP and get its address, and then find XSDT
+ *	2. extract all tables and checksums them all
+ *	3. check ACPI FADT revisoin
+ *
+ * We can parse ACPI boot-time tables such as MADT after
+ * this function is called.
+ */
+void __init acpi_boot_table_init(void)
+{
+	/* If acpi_disabled, bail out */
+	if (acpi_disabled)
+		return;
+
+	/* Initialize the ACPI boot-time table parser. */
+	if (acpi_table_init()) {
+		disable_acpi();
+		return;
+	}
+
+	if (acpi_table_parse(ACPI_SIG_FADT, acpi_parse_fadt))
+		pr_err("Can't find FADT or error happened during parsing FADT\n");
+}
+
+void __init acpi_gic_init(void)
+{
+	struct acpi_table_header *table;
+	acpi_status status;
+	acpi_size tbl_size;
+	int err;
+
+	status = acpi_get_table_with_size(ACPI_SIG_MADT, 0, &table, &tbl_size);
+	if (ACPI_FAILURE(status)) {
+		const char *msg = acpi_format_exception(status);
+
+		pr_err("Failed to get MADT table, %s\n", msg);
+		return;
+	}
+
+	err = gic_v2_acpi_init(table);
+	if (err)
+		pr_err("Failed to initialize GIC IRQ controller");
+
+	early_acpi_os_unmap_memory((char *)table, tbl_size);
+}
+
+/*
+ * Parked Address in ACPI GIC structure will be used as the CPU
+ * release address
+ */
+int acpi_get_cpu_parked_address(int cpu, u64 *addr)
+{
+	if (!addr || !parked_address[cpu])
+		return -EINVAL;
+
+	*addr = parked_address[cpu];
+
+	return 0;
+}
+
+static int __init parse_acpi(char *arg)
+{
+	if (!arg)
+		return -EINVAL;
+
+	/* "acpi=off" disables both ACPI table parsing and interpreter */
+	if (strcmp(arg, "off") == 0)
+		disable_acpi();
+	else if (strcmp(arg, "force") == 0) /* force ACPI to be enabled */
+		enable_acpi();
+	else
+		return -EINVAL;	/* Core will print when we return error */
+
+	return 0;
+}
+early_param("acpi", parse_acpi);
+
+int acpi_isa_irq_to_gsi(unsigned isa_irq, u32 *gsi)
+{
+	return -1;
+}
+
+int acpi_register_ioapic(acpi_handle handle, u64 phys_addr, u32 gsi_base)
+{
+	/* TBD */
+	return -EINVAL;
+}
+EXPORT_SYMBOL(acpi_register_ioapic);
+
+int acpi_unregister_ioapic(acpi_handle handle, u32 gsi_base)
+{
+	/* TBD */
+	return -EINVAL;
+}
+EXPORT_SYMBOL(acpi_unregister_ioapic);
+
diff --git a/arch/arm64/kernel/cpu_ops.c b/arch/arm64/kernel/cpu_ops.c
index cce9524..1d90f31 100644
--- a/arch/arm64/kernel/cpu_ops.c
+++ b/arch/arm64/kernel/cpu_ops.c
@@ -23,19 +23,23 @@
 #include <linux/string.h>
 
 extern const struct cpu_operations smp_spin_table_ops;
+extern const struct cpu_operations smp_parking_protocol_ops;
 extern const struct cpu_operations cpu_psci_ops;
 
 const struct cpu_operations *cpu_ops[NR_CPUS];
 
-static const struct cpu_operations *supported_cpu_ops[] __initconst = {
+static const struct cpu_operations *supported_cpu_ops[] = {
 #ifdef CONFIG_SMP
 	&smp_spin_table_ops,
+#ifdef CONFIG_ARM_PARKING_PROTOCOL
+	&smp_parking_protocol_ops,
+#endif
 #endif
 	&cpu_psci_ops,
 	NULL,
 };
 
-static const struct cpu_operations * __init cpu_get_ops(const char *name)
+const struct cpu_operations *cpu_get_ops(const char *name)
 {
 	const struct cpu_operations **ops = supported_cpu_ops;
 
diff --git a/arch/arm64/kernel/efi.c b/arch/arm64/kernel/efi.c
index 6fac253..f9de195 100644
--- a/arch/arm64/kernel/efi.c
+++ b/arch/arm64/kernel/efi.c
@@ -484,3 +484,40 @@ static int __init arm64_dmi_init(void)
 	return 0;
 }
 core_initcall(arm64_dmi_init);
+
+/*
+ * If nothing else is handling pm_power_off, use EFI
+ *
+ * When Guenter Roeck's power-off handler call chain patches land,
+ * we just need to return true unconditionally.
+ */
+bool efi_poweroff_required(void)
+{
+	return pm_power_off == NULL;
+}
+
+static int arm64_efi_restart(struct notifier_block *this,
+			   unsigned long mode, void *cmd)
+{
+	efi_reboot(reboot_mode, cmd);
+	return NOTIFY_DONE;
+}
+
+static struct notifier_block arm64_efi_restart_nb = {
+	.notifier_call = arm64_efi_restart,
+	.priority = INT_MAX,
+};
+
+static int __init arm64_register_efi_restart(void)
+{
+	int ret = 0;
+
+	if (efi_enabled(EFI_RUNTIME_SERVICES)) {
+		ret = register_restart_handler(&arm64_efi_restart_nb);
+		if (ret)
+			pr_err("%s: cannot register restart handler, %d\n",
+			       __func__, ret);
+	}
+	return ret;
+}
+late_initcall(arm64_register_efi_restart);
diff --git a/arch/arm64/kernel/pci.c b/arch/arm64/kernel/pci.c
index ce5836c..978cd21 100644
--- a/arch/arm64/kernel/pci.c
+++ b/arch/arm64/kernel/pci.c
@@ -17,6 +17,8 @@
 #include <linux/of_pci.h>
 #include <linux/of_platform.h>
 #include <linux/slab.h>
+#include <linux/acpi.h>
+#include <linux/pci-acpi.h>
 
 #include <asm/pci-bridge.h>
 
@@ -37,34 +39,99 @@ resource_size_t pcibios_align_resource(void *data, const struct resource *res,
 	return res->start;
 }
 
+int pcibios_root_bridge_prepare(struct pci_host_bridge *bridge)
+{
+	struct pci_sysdata *sd;
+
+	if (!acpi_disabled) {
+		sd = bridge->bus->sysdata;
+		ACPI_COMPANION_SET(&bridge->dev, sd->companion);
+	}
+	return 0;
+}
+
 /*
  * Try to assign the IRQ number from DT when adding a new device
  */
 int pcibios_add_device(struct pci_dev *dev)
 {
-	dev->irq = of_irq_parse_and_map_pci(dev, 0, 0);
+	if (acpi_disabled)
+		dev->irq = of_irq_parse_and_map_pci(dev, 0, 0);
 
 	return 0;
 }
 
+void pcibios_add_bus(struct pci_bus *bus)
+{
+	if (!acpi_disabled)
+		acpi_pci_add_bus(bus);
+}
 
-#ifdef CONFIG_PCI_DOMAINS_GENERIC
-static bool dt_domain_found = false;
+void pcibios_remove_bus(struct pci_bus *bus)
+{
+	if (!acpi_disabled)
+		acpi_pci_remove_bus(bus);
+}
+
+int pcibios_enable_irq(struct pci_dev *dev)
+{
+	if (!acpi_disabled && !pci_dev_msi_enabled(dev))
+		acpi_pci_irq_enable(dev);
+	return 0;
+}
+
+int pcibios_disable_irq(struct pci_dev *dev)
+{
+	if (!acpi_disabled && !pci_dev_msi_enabled(dev))
+		acpi_pci_irq_disable(dev);
+	return 0;
+}
 
+int pcibios_enable_device(struct pci_dev *dev, int bars)
+{
+	int err;
+
+	err = pci_enable_resources(dev, bars);
+	if (err < 0)
+		return err;
+
+	if (!pci_dev_msi_enabled(dev))
+		return pcibios_enable_irq(dev);
+	return 0;
+}
+
+#ifdef CONFIG_PCI_DOMAINS_GENERIC
 void pci_bus_assign_domain_nr(struct pci_bus *bus, struct device *parent)
 {
-	int domain = of_get_pci_domain_nr(parent->of_node);
-
-	if (domain >= 0) {
-		dt_domain_found = true;
-	} else if (dt_domain_found == true) {
-		dev_err(parent, "Node %s is missing \"linux,pci-domain\" property in DT\n",
-			parent->of_node->full_name);
-		return;
-	} else {
-		domain = pci_get_new_domain_nr();
-	}
+	int domain = -1;
 
-	bus->domain_nr = domain;
+	if (acpi_disabled)
+		domain = of_get_pci_domain_nr(parent->of_node);
+	else {
+		struct pci_sysdata *sd = bus->sysdata;
+
+		domain = sd->domain;
+	}
+	if (domain >= 0)
+		bus->domain_nr = domain;
 }
 #endif
+
+static int __init pcibios_assign_resources(void)
+{
+	struct pci_bus *root_bus;
+
+	if (acpi_disabled)
+		return 0;
+
+	list_for_each_entry(root_bus, &pci_root_buses, node) {
+		pcibios_resource_survey_bus(root_bus);
+		pci_assign_unassigned_root_bus_resources(root_bus);
+	}
+	return 0;
+}
+/*
+ * fs_initcall comes after subsys_initcall, so we know acpi scan
+ * has run.
+ */
+fs_initcall(pcibios_assign_resources);
diff --git a/arch/arm64/kernel/psci.c b/arch/arm64/kernel/psci.c
index f1dbca7..dbb3945 100644
--- a/arch/arm64/kernel/psci.c
+++ b/arch/arm64/kernel/psci.c
@@ -15,6 +15,7 @@
 
 #define pr_fmt(fmt) "psci: " fmt
 
+#include <linux/acpi.h>
 #include <linux/init.h>
 #include <linux/of.h>
 #include <linux/smp.h>
@@ -24,6 +25,7 @@
 #include <linux/slab.h>
 #include <uapi/linux/psci.h>
 
+#include <asm/acpi.h>
 #include <asm/compiler.h>
 #include <asm/cpu_ops.h>
 #include <asm/errno.h>
@@ -304,6 +306,33 @@ static void psci_sys_poweroff(void)
 	invoke_psci_fn(PSCI_0_2_FN_SYSTEM_OFF, 0, 0, 0);
 }
 
+static void psci_0_2_set_functions(void)
+{
+	pr_info("Using standard PSCI v0.2 function IDs\n");
+	psci_function_id[PSCI_FN_CPU_SUSPEND] = PSCI_0_2_FN64_CPU_SUSPEND;
+	psci_ops.cpu_suspend = psci_cpu_suspend;
+
+	psci_function_id[PSCI_FN_CPU_OFF] = PSCI_0_2_FN_CPU_OFF;
+	psci_ops.cpu_off = psci_cpu_off;
+
+	psci_function_id[PSCI_FN_CPU_ON] = PSCI_0_2_FN64_CPU_ON;
+	psci_ops.cpu_on = psci_cpu_on;
+
+	psci_function_id[PSCI_FN_MIGRATE] = PSCI_0_2_FN64_MIGRATE;
+	psci_ops.migrate = psci_migrate;
+
+	psci_function_id[PSCI_FN_AFFINITY_INFO] = PSCI_0_2_FN64_AFFINITY_INFO;
+	psci_ops.affinity_info = psci_affinity_info;
+
+	psci_function_id[PSCI_FN_MIGRATE_INFO_TYPE] =
+		PSCI_0_2_FN_MIGRATE_INFO_TYPE;
+	psci_ops.migrate_info_type = psci_migrate_info_type;
+
+	arm_pm_restart = psci_sys_reset;
+
+	pm_power_off = psci_sys_poweroff;
+}
+
 /*
  * PSCI Function IDs for v0.2+ are well defined so use
  * standard values.
@@ -337,29 +366,7 @@ static int __init psci_0_2_init(struct device_node *np)
 		}
 	}
 
-	pr_info("Using standard PSCI v0.2 function IDs\n");
-	psci_function_id[PSCI_FN_CPU_SUSPEND] = PSCI_0_2_FN64_CPU_SUSPEND;
-	psci_ops.cpu_suspend = psci_cpu_suspend;
-
-	psci_function_id[PSCI_FN_CPU_OFF] = PSCI_0_2_FN_CPU_OFF;
-	psci_ops.cpu_off = psci_cpu_off;
-
-	psci_function_id[PSCI_FN_CPU_ON] = PSCI_0_2_FN64_CPU_ON;
-	psci_ops.cpu_on = psci_cpu_on;
-
-	psci_function_id[PSCI_FN_MIGRATE] = PSCI_0_2_FN64_MIGRATE;
-	psci_ops.migrate = psci_migrate;
-
-	psci_function_id[PSCI_FN_AFFINITY_INFO] = PSCI_0_2_FN64_AFFINITY_INFO;
-	psci_ops.affinity_info = psci_affinity_info;
-
-	psci_function_id[PSCI_FN_MIGRATE_INFO_TYPE] =
-		PSCI_0_2_FN_MIGRATE_INFO_TYPE;
-	psci_ops.migrate_info_type = psci_migrate_info_type;
-
-	arm_pm_restart = psci_sys_reset;
-
-	pm_power_off = psci_sys_poweroff;
+	psci_0_2_set_functions();
 
 out_put_node:
 	of_node_put(np);
@@ -412,7 +419,7 @@ static const struct of_device_id psci_of_match[] __initconst = {
 	{},
 };
 
-int __init psci_init(void)
+int __init psci_dt_init(void)
 {
 	struct device_node *np;
 	const struct of_device_id *matched_np;
@@ -427,6 +434,29 @@ int __init psci_init(void)
 	return init_fn(np);
 }
 
+/*
+ * We use PSCI 0.2+ when ACPI is deployed on ARM64 and it's
+ * explicitly clarified in SBBR
+ */
+int __init psci_acpi_init(void)
+{
+	if (!acpi_psci_present()) {
+		pr_info("is not implemented in ACPI.\n");
+		return -EOPNOTSUPP;
+	}
+
+	pr_info("probing for conduit method from ACPI.\n");
+
+	if (acpi_psci_use_hvc())
+		invoke_psci_fn = __invoke_psci_fn_hvc;
+	else
+		invoke_psci_fn = __invoke_psci_fn_smc;
+
+	psci_0_2_set_functions();
+
+	return 0;
+}
+
 #ifdef CONFIG_SMP
 
 static int __init cpu_psci_cpu_init(struct device_node *dn, unsigned int cpu)
diff --git a/arch/arm64/kernel/setup.c b/arch/arm64/kernel/setup.c
index 20fe2932ad0c..cf4ab5661088 100644
--- a/arch/arm64/kernel/setup.c
+++ b/arch/arm64/kernel/setup.c
@@ -43,6 +43,7 @@
 #include <linux/of_fdt.h>
 #include <linux/of_platform.h>
 #include <linux/efi.h>
+#include <linux/acpi.h>
 #include <linux/personality.h>
 
 #include <asm/fixmap.h>
@@ -61,6 +62,7 @@
 #include <asm/memblock.h>
 #include <asm/psci.h>
 #include <asm/efi.h>
+#include <asm/acpi.h>
 
 unsigned int processor_id;
 EXPORT_SYMBOL(processor_id);
@@ -387,6 +389,8 @@ void __init setup_arch(char **cmdline_p)
 	early_fixmap_init();
 	early_ioremap_init();
 
+	disable_acpi();
+
 	parse_early_param();
 
 	/*
@@ -398,19 +402,29 @@ void __init setup_arch(char **cmdline_p)
 	efi_init();
 	arm64_memblock_init();
 
+	/* Parse the ACPI tables for possible boot-time configuration */
+	acpi_boot_table_init();
+
 	paging_init();
 	request_standard_resources();
 
 	efi_idmap_init();
 	early_ioremap_reset();
 
-	unflatten_device_tree();
-
-	psci_init();
+	if (acpi_disabled) {
+		unflatten_device_tree();
+		psci_dt_init();
+		cpu_read_bootcpu_ops();
+#ifdef CONFIG_SMP
+		of_smp_init_cpus();
+#endif
+	} else {
+		psci_acpi_init();
+		acpi_smp_init_cpus();
+	}
 
 	cpu_read_bootcpu_ops();
 #ifdef CONFIG_SMP
-	smp_init_cpus();
 	smp_build_mpidr_hash();
 #endif
 
@@ -565,3 +579,25 @@ const struct seq_operations cpuinfo_op = {
 	.stop	= c_stop,
 	.show	= c_show
 };
+
+/*
+ * Temporary hack to avoid need for console= on command line
+ */
+static int __init arm64_console_setup(void)
+{
+	/* Allow cmdline to override our assumed preferences */
+	if (console_set_on_cmdline)
+		return 0;
+
+	if (IS_ENABLED(CONFIG_SBSAUART_TTY))
+		add_preferred_console("ttySBSA", 0, "115200");
+
+	if (IS_ENABLED(CONFIG_SERIAL_AMBA_PL011))
+		add_preferred_console("ttyAMA", 0, "115200");
+
+	if (IS_ENABLED(CONFIG_SERIAL_8250))
+		add_preferred_console("ttyS", 0, "115200");
+
+	return 0;
+}
+early_initcall(arm64_console_setup);
diff --git a/arch/arm64/kernel/smp.c b/arch/arm64/kernel/smp.c
index 7ae6ee0..5aaf5a4 100644
--- a/arch/arm64/kernel/smp.c
+++ b/arch/arm64/kernel/smp.c
@@ -323,7 +323,7 @@ void __init smp_prepare_boot_cpu(void)
  * cpu logical map array containing MPIDR values related to logical
  * cpus. Assumes that cpu_logical_map(0) has already been initialized.
  */
-void __init smp_init_cpus(void)
+void __init of_smp_init_cpus(void)
 {
 	struct device_node *dn = NULL;
 	unsigned int i, cpu = 1;
diff --git a/arch/arm64/kernel/smp_parking_protocol.c b/arch/arm64/kernel/smp_parking_protocol.c
new file mode 100644
index 0000000..e1153ce
--- /dev/null
+++ b/arch/arm64/kernel/smp_parking_protocol.c
@@ -0,0 +1,110 @@
+/*
+ * Parking Protocol SMP initialisation
+ *
+ * Based largely on spin-table method.
+ *
+ * Copyright (C) 2013 ARM Ltd.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+#include <linux/delay.h>
+#include <linux/init.h>
+#include <linux/of.h>
+#include <linux/smp.h>
+#include <linux/types.h>
+#include <linux/acpi.h>
+
+#include <asm/cacheflush.h>
+#include <asm/cpu_ops.h>
+#include <asm/cputype.h>
+#include <asm/smp_plat.h>
+
+static phys_addr_t cpu_mailbox_addr[NR_CPUS];
+
+static void (*__smp_boot_wakeup)(int cpu);
+
+void set_smp_boot_wakeup_call(void (*fn)(int cpu))
+{
+	__smp_boot_wakeup = fn;
+}
+
+static int smp_parking_protocol_cpu_init(struct device_node *dn,
+					 unsigned int cpu)
+{
+	/*
+	 * Determine the mailbox address.
+	 */
+	if (!acpi_get_cpu_parked_address(cpu, &cpu_mailbox_addr[cpu])) {
+		pr_info("%s: ACPI parked addr=%llx\n",
+			__func__, cpu_mailbox_addr[cpu]);
+		return 0;
+	}
+
+	pr_err("CPU %d: missing or invalid parking protocol mailbox\n", cpu);
+
+	return -1;
+}
+
+static int smp_parking_protocol_cpu_prepare(unsigned int cpu)
+{
+	return 0;
+}
+
+struct parking_protocol_mailbox {
+	__le32 cpu_id;
+	__le32 reserved;
+	__le64 entry_point;
+};
+
+static int smp_parking_protocol_cpu_boot(unsigned int cpu)
+{
+	struct parking_protocol_mailbox __iomem *mailbox;
+
+	if (!cpu_mailbox_addr[cpu] || !__smp_boot_wakeup)
+		return -ENODEV;
+
+	/*
+	 * The mailbox may or may not be inside the linear mapping.
+	 * As ioremap_cache will either give us a new mapping or reuse the
+	 * existing linear mapping, we can use it to cover both cases. In
+	 * either case the memory will be MT_NORMAL.
+	 */
+	mailbox = ioremap_cache(cpu_mailbox_addr[cpu], sizeof(*mailbox));
+	if (!mailbox)
+		return -ENOMEM;
+
+	/*
+	 * We write the entry point and cpu id as LE regardless of the
+	 * native endianess of the kernel. Therefore, any boot-loaders
+	 * that read this address need to convert this address to the
+	 * Boot-Loader's endianess before jumping.
+	 */
+	writeq(__pa(secondary_entry), &mailbox->entry_point);
+	writel(cpu, &mailbox->cpu_id);
+	__flush_dcache_area(mailbox, sizeof(*mailbox));
+	__smp_boot_wakeup(cpu);
+
+	/* temp hack for broken firmware */
+	sev();
+
+	iounmap(mailbox);
+
+	return 0;
+}
+
+const struct cpu_operations smp_parking_protocol_ops = {
+	.name		= "parking-protocol",
+	.cpu_init	= smp_parking_protocol_cpu_init,
+	.cpu_prepare	= smp_parking_protocol_cpu_prepare,
+	.cpu_boot	= smp_parking_protocol_cpu_boot,
+};
diff --git a/arch/arm64/kernel/time.c b/arch/arm64/kernel/time.c
index 1a7125c..42f9195 100644
--- a/arch/arm64/kernel/time.c
+++ b/arch/arm64/kernel/time.c
@@ -35,6 +35,7 @@
 #include <linux/delay.h>
 #include <linux/clocksource.h>
 #include <linux/clk-provider.h>
+#include <linux/acpi.h>
 
 #include <clocksource/arm_arch_timer.h>
 
@@ -72,6 +73,12 @@ void __init time_init(void)
 
 	tick_setup_hrtimer_broadcast();
 
+	/*
+	 * Since ACPI or FDT will only one be available in the system,
+	 * we can use acpi_generic_timer_init() here safely
+	 */
+	acpi_generic_timer_init();
+
 	arch_timer_rate = arch_timer_get_rate();
 	if (!arch_timer_rate)
 		panic("Unable to initialise architected timer.\n");
diff --git a/arch/arm64/mm/dma-mapping.c b/arch/arm64/mm/dma-mapping.c
index d920942..cf890e3 100644
--- a/arch/arm64/mm/dma-mapping.c
+++ b/arch/arm64/mm/dma-mapping.c
@@ -23,8 +23,14 @@
 #include <linux/genalloc.h>
 #include <linux/dma-mapping.h>
 #include <linux/dma-contiguous.h>
+#include <linux/of.h>
+#include <linux/of_address.h>
+#include <linux/platform_device.h>
 #include <linux/vmalloc.h>
 #include <linux/swiotlb.h>
+#include <linux/amba/bus.h>
+#include <linux/acpi.h>
+#include <linux/pci.h>
 
 #include <asm/cacheflush.h>
 
@@ -423,10 +429,116 @@ out:
 	return -ENOMEM;
 }
 
+#ifdef CONFIG_PCI
+static void arm64_of_set_dma_ops(void *_dev)
+{
+	struct device *dev = _dev;
+
+	/*
+	 * PCI devices won't have an ACPI handle but the bridge will.
+	 * Search up the device chain until we find an of_node
+	 * to check.
+	 */
+	while (dev) {
+		if (dev->of_node) {
+			if (of_dma_is_coherent(dev->of_node))
+				set_dma_ops(_dev, &coherent_swiotlb_dma_ops);
+			break;
+		}
+		dev = dev->parent;
+	}
+}
+#else
+static inline arm64_of_set_dma_ops(void *_dev) {}
+#endif
+
+
+#ifdef CONFIG_ACPI
+static void arm64_acpi_set_dma_ops(void *_dev)
+{
+	struct device *dev = _dev;
+
+	/*
+	 * Kernel defaults to noncoherent ops but ACPI 5.1 spec says arm64
+	 * defaults to coherent. For PCI devices, the _CCA is only a default
+	 * setting. Individual devices on a PCIe bus may set transaction
+	 * ordering and caching attributes individually. Such drivers will
+	 * also be resonsible for using the correct DMA ops for the cache
+	 * conherence used.
+	 *
+	 * PCI devices won't have a handle but the bridge will.
+	 * Search up the device chain until we find an ACPI handle
+	 * to check.
+	 */
+	while (dev) {
+		if (ACPI_HANDLE(dev)) {
+			acpi_status status;
+			int coherent;
+			struct dma_map_ops *ops;
+
+			status =  acpi_check_coherency(ACPI_HANDLE(dev),
+						       &coherent);
+			if (ACPI_FAILURE(status) || coherent)
+				ops = &coherent_swiotlb_dma_ops;
+			else
+				ops = &noncoherent_swiotlb_dma_ops;
+
+			set_dma_ops(_dev, ops);
+			break;
+		}
+		dev = dev->parent;
+	}
+}
+#else
+static inline arm64_acpi_set_dma_ops(void *_dev) {}
+#endif
+
+static int dma_bus_notifier(struct notifier_block *nb,
+			    unsigned long event, void *_dev)
+{
+	if (event != BUS_NOTIFY_ADD_DEVICE)
+		return NOTIFY_DONE;
+
+	if (acpi_disabled)
+		arm64_of_set_dma_ops(_dev);
+	else
+		arm64_acpi_set_dma_ops(_dev);
+
+	return NOTIFY_OK;
+}
+
+#ifdef CONFIG_ACPI
+static struct notifier_block platform_bus_nb = {
+	.notifier_call = dma_bus_notifier,
+};
+
+static struct notifier_block amba_bus_nb = {
+	.notifier_call = dma_bus_notifier,
+};
+#endif
+
+#ifdef CONFIG_PCI
+static struct notifier_block pci_bus_nb = {
+	.notifier_call = dma_bus_notifier,
+};
+#endif
+
 static int __init swiotlb_late_init(void)
 {
 	size_t swiotlb_size = min(SZ_64M, MAX_ORDER_NR_PAGES << PAGE_SHIFT);
 
+	/*
+	 * These must be registered before of_platform_populate().
+	 */
+#ifdef CONFIG_ACPI
+	bus_register_notifier(&platform_bus_type, &platform_bus_nb);
+	bus_register_notifier(&amba_bustype, &amba_bus_nb);
+#endif
+
+#ifdef CONFIG_PCI
+	bus_register_notifier(&pci_bus_type, &pci_bus_nb);
+#endif
+
 	dma_ops = &noncoherent_swiotlb_dma_ops;
 
 	return swiotlb_late_init_with_default_size(swiotlb_size);
diff --git a/arch/arm64/pci/Makefile b/arch/arm64/pci/Makefile
new file mode 100644
index 0000000..7038b51
--- /dev/null
+++ b/arch/arm64/pci/Makefile
@@ -0,0 +1,2 @@
+obj-y                 += pci.o
+obj-$(CONFIG_ACPI)    += mmconfig.o
diff --git a/arch/arm64/pci/mmconfig.c b/arch/arm64/pci/mmconfig.c
new file mode 100644
index 0000000..e83e0d5
--- /dev/null
+++ b/arch/arm64/pci/mmconfig.c
@@ -0,0 +1,292 @@
+/*
+ * mmconfig.c - Low-level direct PCI config space access via MMCONFIG
+ *
+ * Borrowed heavily from x86
+ */
+
+#include <linux/pci.h>
+#include <linux/acpi.h>
+#include <linux/init.h>
+#include <linux/bitmap.h>
+#include <linux/dmi.h>
+#include <linux/slab.h>
+#include <linux/mutex.h>
+#include <linux/rculist.h>
+#include <linux/rcupdate.h>
+
+#define PREFIX "PCI: "
+
+/* Indicate if the mmcfg resources have been placed into the resource table. */
+static bool pci_mmcfg_running_state;
+static bool pci_mmcfg_arch_init_failed;
+static DEFINE_MUTEX(pci_mmcfg_lock);
+
+LIST_HEAD(pci_mmcfg_list);
+
+struct pci_mmcfg_region *pci_mmconfig_lookup(int segment, int bus)
+{
+	struct pci_mmcfg_region *cfg;
+
+	list_for_each_entry_rcu(cfg, &pci_mmcfg_list, list)
+		if (cfg->segment == segment &&
+		    cfg->start_bus <= bus && bus <= cfg->end_bus)
+			return cfg;
+
+	return NULL;
+}
+
+static void __iomem *mcfg_ioremap(struct pci_mmcfg_region *cfg)
+{
+	void __iomem *addr;
+	u64 start, size;
+	int num_buses;
+
+	start = cfg->address + PCI_MMCFG_BUS_OFFSET(cfg->start_bus);
+	num_buses = cfg->end_bus - cfg->start_bus + 1;
+	size = PCI_MMCFG_BUS_OFFSET(num_buses);
+	addr = ioremap_nocache(start, size);
+	if (addr)
+		addr -= PCI_MMCFG_BUS_OFFSET(cfg->start_bus);
+	return addr;
+}
+
+void pci_mmcfg_arch_unmap(struct pci_mmcfg_region *cfg)
+{
+	if (cfg && cfg->virt) {
+		iounmap(cfg->virt + PCI_MMCFG_BUS_OFFSET(cfg->start_bus));
+		cfg->virt = NULL;
+	}
+}
+
+void __init pci_mmcfg_arch_free(void)
+{
+	struct pci_mmcfg_region *cfg;
+
+	list_for_each_entry(cfg, &pci_mmcfg_list, list)
+		pci_mmcfg_arch_unmap(cfg);
+}
+
+int pci_mmcfg_arch_map(struct pci_mmcfg_region *cfg)
+{
+	cfg->virt = mcfg_ioremap(cfg);
+	if (!cfg->virt) {
+		pr_err(PREFIX "can't map MMCONFIG at %pR\n", &cfg->res);
+		return -ENOMEM;
+	}
+
+	return 0;
+}
+
+static void __init pci_mmconfig_remove(struct pci_mmcfg_region *cfg)
+{
+	if (cfg->res.parent)
+		release_resource(&cfg->res);
+	list_del(&cfg->list);
+	kfree(cfg);
+}
+
+static void __init free_all_mmcfg(void)
+{
+	struct pci_mmcfg_region *cfg, *tmp;
+
+	pci_mmcfg_arch_free();
+	list_for_each_entry_safe(cfg, tmp, &pci_mmcfg_list, list)
+		pci_mmconfig_remove(cfg);
+}
+
+static void list_add_sorted(struct pci_mmcfg_region *new)
+{
+	struct pci_mmcfg_region *cfg;
+
+	/* keep list sorted by segment and starting bus number */
+	list_for_each_entry_rcu(cfg, &pci_mmcfg_list, list) {
+		if (cfg->segment > new->segment ||
+		    (cfg->segment == new->segment &&
+		     cfg->start_bus >= new->start_bus)) {
+			list_add_tail_rcu(&new->list, &cfg->list);
+			return;
+		}
+	}
+	list_add_tail_rcu(&new->list, &pci_mmcfg_list);
+}
+
+static struct pci_mmcfg_region *pci_mmconfig_alloc(int segment, int start,
+						   int end, u64 addr)
+{
+	struct pci_mmcfg_region *new;
+	struct resource *res;
+
+	if (addr == 0)
+		return NULL;
+
+	new = kzalloc(sizeof(*new), GFP_KERNEL);
+	if (!new)
+		return NULL;
+
+	new->address = addr;
+	new->segment = segment;
+	new->start_bus = start;
+	new->end_bus = end;
+
+	res = &new->res;
+	res->start = addr + PCI_MMCFG_BUS_OFFSET(start);
+	res->end = addr + PCI_MMCFG_BUS_OFFSET(end + 1) - 1;
+	res->flags = IORESOURCE_MEM | IORESOURCE_BUSY;
+	snprintf(new->name, PCI_MMCFG_RESOURCE_NAME_LEN,
+		 "PCI MMCONFIG %04x [bus %02x-%02x]", segment, start, end);
+	res->name = new->name;
+
+	return new;
+}
+
+static struct pci_mmcfg_region *__init pci_mmconfig_add(int segment, int start,
+							int end, u64 addr)
+{
+	struct pci_mmcfg_region *new;
+
+	new = pci_mmconfig_alloc(segment, start, end, addr);
+	if (new) {
+		mutex_lock(&pci_mmcfg_lock);
+		list_add_sorted(new);
+		mutex_unlock(&pci_mmcfg_lock);
+
+		pr_info(PREFIX
+		       "MMCONFIG for domain %04x [bus %02x-%02x] at %pR "
+		       "(base %#lx)\n",
+		       segment, start, end, &new->res, (unsigned long)addr);
+	}
+
+	return new;
+}
+
+extern struct acpi_mcfg_fixup __start_acpi_mcfg_fixups[];
+extern struct acpi_mcfg_fixup __end_acpi_mcfg_fixups[];
+
+static int __init pci_parse_mcfg(struct acpi_table_header *header)
+{
+	struct acpi_table_mcfg *mcfg;
+	struct acpi_mcfg_allocation *cfg_table, *cfg;
+	struct acpi_mcfg_fixup *fixup;
+	struct pci_mmcfg_region *new;
+	unsigned long i;
+	int entries;
+
+	if (!header)
+		return -EINVAL;
+
+	mcfg = (struct acpi_table_mcfg *)header;
+
+	/* how many config structures do we have */
+	free_all_mmcfg();
+	entries = 0;
+	i = header->length - sizeof(struct acpi_table_mcfg);
+	while (i >= sizeof(struct acpi_mcfg_allocation)) {
+		entries++;
+		i -= sizeof(struct acpi_mcfg_allocation);
+	}
+	if (entries == 0) {
+		pr_err(PREFIX "MMCONFIG has no entries\n");
+		return -ENODEV;
+	}
+
+	fixup = __start_acpi_mcfg_fixups;
+	while (fixup < __end_acpi_mcfg_fixups) {
+		if (!strncmp(fixup->oem_id, header->oem_id, 6) &&
+		    !strncmp(fixup->oem_table_id, header->oem_table_id, 8))
+			break;
+		++fixup;
+	}
+
+	cfg_table = (struct acpi_mcfg_allocation *) &mcfg[1];
+	for (i = 0; i < entries; i++) {
+		cfg = &cfg_table[i];
+
+		new = pci_mmconfig_add(cfg->pci_segment, cfg->start_bus_number,
+				       cfg->end_bus_number, cfg->address);
+		if (!new) {
+			pr_warn(PREFIX "no memory for MCFG entries\n");
+			free_all_mmcfg();
+			return -ENOMEM;
+		}
+		if (fixup < __end_acpi_mcfg_fixups)
+			new->fixup = fixup->hook;
+	}
+
+	return 0;
+}
+
+int __init pci_mmcfg_arch_init(void)
+{
+	struct pci_mmcfg_region *cfg;
+
+	list_for_each_entry(cfg, &pci_mmcfg_list, list)
+		if (pci_mmcfg_arch_map(cfg)) {
+			pci_mmcfg_arch_free();
+			return 0;
+		}
+
+	return 1;
+}
+
+static void __init __pci_mmcfg_init(int early)
+{
+	if (list_empty(&pci_mmcfg_list)) {
+		pr_info("No MCFG table found!\n");
+		pci_mmcfg_arch_init_failed = true;
+		return;
+	}
+
+	if (!pci_mmcfg_arch_init()) {
+		pr_info("pci_mmcfg_arch_init failed!\n");
+		free_all_mmcfg();
+		pci_mmcfg_arch_init_failed = true;
+	}
+}
+
+void __init pci_mmcfg_early_init(void)
+{
+	acpi_table_parse(ACPI_SIG_MCFG, pci_parse_mcfg);
+
+	__pci_mmcfg_init(1);
+}
+
+static int __init pci_mmcfg_init(void)
+{
+	pci_mmcfg_early_init();
+	return 0;
+}
+arch_initcall(pci_mmcfg_init);
+
+void __init pci_mmcfg_late_init(void)
+{
+	/* MMCONFIG hasn't been enabled yet, try again */
+	if (pci_mmcfg_arch_init_failed) {
+		acpi_table_parse(ACPI_SIG_MCFG, pci_parse_mcfg);
+		__pci_mmcfg_init(0);
+	}
+}
+
+static int __init pci_mmcfg_late_insert_resources(void)
+{
+	struct pci_mmcfg_region *cfg;
+
+	pci_mmcfg_running_state = true;
+
+	/*
+	 * Attempt to insert the mmcfg resources but not with the busy flag
+	 * marked so it won't cause request errors when __request_region is
+	 * called.
+	 */
+	list_for_each_entry(cfg, &pci_mmcfg_list, list)
+		if (!cfg->res.parent)
+			insert_resource(&iomem_resource, &cfg->res);
+
+	return 0;
+}
+
+/*
+ * Perform MMCONFIG resource insertion after PCI initialization to allow for
+ * misprogrammed MCFG tables that state larger sizes but actually conflict
+ * with other system resources.
+ */
+late_initcall(pci_mmcfg_late_insert_resources);
diff --git a/arch/arm64/pci/pci.c b/arch/arm64/pci/pci.c
new file mode 100644
index 0000000..0166475
--- /dev/null
+++ b/arch/arm64/pci/pci.c
@@ -0,0 +1,461 @@
+#include <linux/acpi.h>
+#include <linux/of_address.h>
+#include <linux/types.h>
+#include <linux/kernel.h>
+#include <linux/pci.h>
+
+struct pci_root_info {
+	struct acpi_device *bridge;
+	char name[16];
+	unsigned int res_num;
+	struct resource *res;
+	resource_size_t *res_offset;
+	struct pci_sysdata sd;
+	u16 segment;
+	u8 start_bus;
+	u8 end_bus;
+};
+
+static char __iomem *pci_dev_base(struct pci_mmcfg_region *cfg,
+				  unsigned int bus, unsigned int devfn)
+{
+	return cfg->virt + (PCI_MMCFG_BUS_OFFSET(bus) | (devfn << 12));
+}
+
+static int __raw_pci_read(struct pci_mmcfg_region *cfg, unsigned int bus,
+			  unsigned int devfn, int reg, int len, u32 *value)
+{
+	char __iomem *addr = pci_dev_base(cfg, bus, devfn) + (reg & ~3);
+	int shift = (reg & 3) * 8;
+	u32 v;
+
+	v = readl(addr) >> shift;
+	switch (len) {
+	case 1:
+		*value = v & 0xff;
+		break;
+	case 2:
+		*value = v & 0xffff;
+		break;
+	case 4:
+		*value = v;
+		break;
+	}
+	return 0;
+}
+
+static int __raw_pci_write(struct pci_mmcfg_region *cfg, unsigned int bus,
+			   unsigned int devfn, int reg, int len, u32 value)
+{
+	char __iomem *addr = pci_dev_base(cfg, bus, devfn) + (reg & ~3);
+	int mask = 0, shift = (reg & 3) * 8;
+	u32 v;
+
+	switch (len) {
+	case 1:
+		mask = 0xff << shift;
+		break;
+	case 2:
+		mask = 0xffff << shift;
+		break;
+	}
+
+	if (mask) {
+		v = readl(addr) & ~mask;
+		writel(v | (value << shift), addr);
+	} else
+		writel(value, addr);
+
+	return 0;
+}
+
+/*
+ * raw_pci_read/write - Platform-specific PCI config space access.
+ */
+int raw_pci_read(unsigned int domain, unsigned int bus,
+		 unsigned int devfn, int reg, int len, u32 *val)
+{
+	struct pci_mmcfg_region *cfg;
+	int ret;
+
+	if (unlikely((bus > 255) || (devfn > 255) || (reg > 4095))) {
+err:		*val = -1;
+		return -EINVAL;
+	}
+
+	rcu_read_lock();
+	cfg = pci_mmconfig_lookup(domain, bus);
+	if (!cfg || !cfg->virt) {
+		rcu_read_unlock();
+		goto err;
+	}
+
+	if (cfg->read)
+		ret = (*cfg->read)(cfg, bus, devfn, reg, len, val);
+	else
+		ret = __raw_pci_read(cfg, bus, devfn, reg, len, val);
+
+	rcu_read_unlock();
+
+	return ret;
+}
+
+int raw_pci_write(unsigned int domain, unsigned int bus,
+		  unsigned int devfn, int reg, int len, u32 val)
+{
+	struct pci_mmcfg_region *cfg;
+	int ret;
+
+	if (unlikely((bus > 255) || (devfn > 255) || (reg > 4095)))
+		return -EINVAL;
+
+	rcu_read_lock();
+	cfg = pci_mmconfig_lookup(domain, bus);
+	if (!cfg || !cfg->virt) {
+		rcu_read_unlock();
+		return -EINVAL;
+	}
+
+	if (cfg->write)
+		ret = (*cfg->write)(cfg, bus, devfn, reg, len, val);
+	else
+		ret = __raw_pci_write(cfg, bus, devfn, reg, len, val);
+
+	rcu_read_unlock();
+
+	return ret;
+}
+
+#ifdef CONFIG_ACPI
+static int pci_read(struct pci_bus *bus, unsigned int devfn, int where,
+		    int size, u32 *value)
+{
+	return raw_pci_read(pci_domain_nr(bus), bus->number,
+			    devfn, where, size, value);
+}
+
+static int pci_write(struct pci_bus *bus, unsigned int devfn, int where,
+		     int size, u32 value)
+{
+	return raw_pci_write(pci_domain_nr(bus), bus->number,
+			     devfn, where, size, value);
+}
+
+struct pci_ops pci_root_ops = {
+	.read = pci_read,
+	.write = pci_write,
+};
+
+static acpi_status resource_to_addr(struct acpi_resource *resource,
+				    struct acpi_resource_address64 *addr)
+{
+	acpi_status status;
+
+	memset(addr, 0, sizeof(*addr));
+	switch (resource->type) {
+	case ACPI_RESOURCE_TYPE_ADDRESS16:
+	case ACPI_RESOURCE_TYPE_ADDRESS32:
+	case ACPI_RESOURCE_TYPE_ADDRESS64:
+		status = acpi_resource_to_address64(resource, addr);
+		if (ACPI_SUCCESS(status) &&
+		    (addr->resource_type == ACPI_MEMORY_RANGE ||
+		    addr->resource_type == ACPI_IO_RANGE) &&
+		    addr->address_length > 0) {
+			return AE_OK;
+		}
+		break;
+	}
+	return AE_ERROR;
+}
+
+static acpi_status count_resource(struct acpi_resource *acpi_res, void *data)
+{
+	struct pci_root_info *info = data;
+	struct acpi_resource_address64 addr;
+	acpi_status status;
+
+	status = resource_to_addr(acpi_res, &addr);
+	if (ACPI_SUCCESS(status))
+		info->res_num++;
+	return AE_OK;
+}
+
+static acpi_status setup_resource(struct acpi_resource *acpi_res, void *data)
+{
+	struct pci_root_info *info = data;
+	struct resource *res;
+	struct acpi_resource_address64 addr;
+	acpi_status status;
+	unsigned long flags;
+	u64 start, end;
+
+	status = resource_to_addr(acpi_res, &addr);
+	if (!ACPI_SUCCESS(status))
+		return AE_OK;
+
+	if (addr.resource_type == ACPI_MEMORY_RANGE) {
+		flags = IORESOURCE_MEM;
+		if (addr.info.mem.caching == ACPI_PREFETCHABLE_MEMORY)
+			flags |= IORESOURCE_PREFETCH;
+	} else if (addr.resource_type == ACPI_IO_RANGE) {
+		flags = IORESOURCE_IO;
+	} else
+		return AE_OK;
+
+	start = addr.minimum + addr.translation_offset;
+	end = addr.maximum + addr.translation_offset;
+
+	res = &info->res[info->res_num];
+	res->name = info->name;
+	res->flags = flags;
+	res->start = start;
+	res->end = end;
+
+	if (flags & IORESOURCE_IO) {
+		unsigned long port;
+		int err;
+
+		err = pci_register_io_range(start, addr.address_length);
+		if (err)
+			return AE_OK;
+
+		port = pci_address_to_pio(start);
+		if (port == (unsigned long)-1) {
+			res->start = -1;
+			res->end = -1;
+			return AE_OK;
+		}
+
+		res->start = port;
+		res->end = res->start + addr.address_length - 1;
+
+		if (pci_remap_iospace(res, start) < 0)
+			return AE_OK;
+
+		info->res_offset[info->res_num] = 0;
+	} else
+		info->res_offset[info->res_num] = addr.translation_offset;
+
+	info->res_num++;
+
+	return AE_OK;
+}
+
+static void coalesce_windows(struct pci_root_info *info, unsigned long type)
+{
+	int i, j;
+	struct resource *res1, *res2;
+
+	for (i = 0; i < info->res_num; i++) {
+		res1 = &info->res[i];
+		if (!(res1->flags & type))
+			continue;
+
+		for (j = i + 1; j < info->res_num; j++) {
+			res2 = &info->res[j];
+			if (!(res2->flags & type))
+				continue;
+
+			/*
+			 * I don't like throwing away windows because then
+			 * our resources no longer match the ACPI _CRS, but
+			 * the kernel resource tree doesn't allow overlaps.
+			 */
+			if (resource_overlaps(res1, res2)) {
+				res2->start = min(res1->start, res2->start);
+				res2->end = max(res1->end, res2->end);
+				dev_info(&info->bridge->dev,
+					 "host bridge window expanded to %pR; %pR ignored\n",
+					 res2, res1);
+				res1->flags = 0;
+			}
+		}
+	}
+}
+
+static void add_resources(struct pci_root_info *info,
+			  struct list_head *resources)
+{
+	int i;
+	struct resource *res, *root, *conflict;
+
+	coalesce_windows(info, IORESOURCE_MEM);
+	coalesce_windows(info, IORESOURCE_IO);
+
+	for (i = 0; i < info->res_num; i++) {
+		res = &info->res[i];
+
+		if (res->flags & IORESOURCE_MEM)
+			root = &iomem_resource;
+		else if (res->flags & IORESOURCE_IO)
+			root = &ioport_resource;
+		else
+			continue;
+
+		conflict = insert_resource_conflict(root, res);
+		if (conflict)
+			dev_info(&info->bridge->dev,
+				 "ignoring host bridge window %pR (conflicts with %s %pR)\n",
+				 res, conflict->name, conflict);
+		else
+			pci_add_resource_offset(resources, res,
+						info->res_offset[i]);
+	}
+}
+
+static void free_pci_root_info_res(struct pci_root_info *info)
+{
+	kfree(info->res);
+	info->res = NULL;
+	kfree(info->res_offset);
+	info->res_offset = NULL;
+	info->res_num = 0;
+}
+
+static void __release_pci_root_info(struct pci_root_info *info)
+{
+	int i;
+	struct resource *res;
+
+	for (i = 0; i < info->res_num; i++) {
+		res = &info->res[i];
+
+		if (!res->parent)
+			continue;
+
+		if (!(res->flags & (IORESOURCE_MEM | IORESOURCE_IO)))
+			continue;
+
+		release_resource(res);
+	}
+
+	free_pci_root_info_res(info);
+
+	kfree(info);
+}
+
+static void release_pci_root_info(struct pci_host_bridge *bridge)
+{
+	struct pci_root_info *info = bridge->release_data;
+
+	__release_pci_root_info(info);
+}
+
+static void probe_pci_root_info(struct pci_root_info *info,
+				struct acpi_device *device,
+				int busnum, int domain)
+{
+	size_t size;
+
+	sprintf(info->name, "PCI Bus %04x:%02x", domain, busnum);
+	info->bridge = device;
+
+	info->res_num = 0;
+	acpi_walk_resources(device->handle, METHOD_NAME__CRS, count_resource,
+				info);
+	if (!info->res_num)
+		return;
+
+	size = sizeof(*info->res) * info->res_num;
+	info->res = kzalloc_node(size, GFP_KERNEL, info->sd.node);
+	if (!info->res) {
+		info->res_num = 0;
+		return;
+	}
+
+	size = sizeof(*info->res_offset) * info->res_num;
+	info->res_num = 0;
+	info->res_offset = kzalloc_node(size, GFP_KERNEL, info->sd.node);
+	if (!info->res_offset) {
+		kfree(info->res);
+		info->res = NULL;
+		return;
+	}
+
+	acpi_walk_resources(device->handle, METHOD_NAME__CRS, setup_resource,
+				info);
+}
+
+/* Root bridge scanning */
+struct pci_bus *pci_acpi_scan_root(struct acpi_pci_root *root)
+{
+	struct acpi_device *device = root->device;
+	struct pci_mmcfg_region *mcfg;
+	struct pci_root_info *info;
+	int domain = root->segment;
+	int busnum = root->secondary.start;
+	LIST_HEAD(resources);
+	struct pci_bus *bus;
+	struct pci_sysdata *sd;
+	int node;
+
+	/* we need mmconfig */
+	mcfg = pci_mmconfig_lookup(domain, busnum);
+	if (!mcfg) {
+		pr_err("pci_bus %04x:%02x has no MCFG table\n",
+		       domain, busnum);
+		return NULL;
+	}
+
+	/* temporary hack */
+	if (mcfg->fixup)
+		(*mcfg->fixup)(root, mcfg);
+
+	if (domain && !pci_domains_supported) {
+		pr_warn("PCI %04x:%02x: multiple domains not supported.\n",
+			domain, busnum);
+		return NULL;
+	}
+
+	node = NUMA_NO_NODE;
+
+	info = kzalloc_node(sizeof(*info), GFP_KERNEL, node);
+	if (!info) {
+		pr_warn("PCI %04x:%02x: ignored (out of memory)\n",
+			domain, busnum);
+		return NULL;
+	}
+	info->segment = domain;
+	info->start_bus = busnum;
+	info->end_bus = root->secondary.end;
+
+	sd = &info->sd;
+	sd->domain = domain;
+	sd->node = node;
+	sd->companion = device;
+
+	probe_pci_root_info(info, device, busnum, domain);
+
+	/* insert busn res at first */
+	pci_add_resource(&resources,  &root->secondary);
+
+	/* then _CRS resources */
+	add_resources(info, &resources);
+
+	bus = pci_create_root_bus(NULL, busnum, &pci_root_ops, sd, &resources);
+	if (bus) {
+		pci_scan_child_bus(bus);
+		pci_set_host_bridge_release(to_pci_host_bridge(bus->bridge),
+					    release_pci_root_info, info);
+	} else {
+		pci_free_resource_list(&resources);
+		__release_pci_root_info(info);
+	}
+
+	/* After the PCI-E bus has been walked and all devices discovered,
+	 * configure any settings of the fabric that might be necessary.
+	 */
+	if (bus) {
+		struct pci_bus *child;
+
+		list_for_each_entry(child, &bus->children, node)
+			pcie_bus_configure_settings(child);
+	}
+
+	if (bus && node != NUMA_NO_NODE)
+		dev_printk(KERN_DEBUG, &bus->dev, "on NUMA node %d\n", node);
+
+	return bus;
+}
+
+#endif /* CONFIG_ACPI */
diff --git a/drivers/acpi/Kconfig b/drivers/acpi/Kconfig
index 8951cef..63aa47c 100644
--- a/drivers/acpi/Kconfig
+++ b/drivers/acpi/Kconfig
@@ -5,8 +5,7 @@
 menuconfig ACPI
 	bool "ACPI (Advanced Configuration and Power Interface) Support"
 	depends on !IA64_HP_SIM
-	depends on IA64 || X86
-	depends on PCI
+	depends on ((IA64 || X86) && PCI) || ARM64
 	select PNP
 	default y
 	help
@@ -163,6 +162,7 @@ config ACPI_PROCESSOR
 	tristate "Processor"
 	select THERMAL
 	select CPU_IDLE
+	depends on X86 || IA64
 	default y
 	help
 	  This driver installs ACPI as the idle handler for Linux and uses
@@ -263,7 +263,7 @@ config ACPI_DEBUG
 
 config ACPI_PCI_SLOT
 	bool "PCI slot detection driver"
-	depends on SYSFS
+	depends on SYSFS && PCI
 	default n
 	help
 	  This driver creates entries in /sys/bus/pci/slots/ for all PCI
diff --git a/drivers/acpi/Makefile b/drivers/acpi/Makefile
index f74317c..c346011 100644
--- a/drivers/acpi/Makefile
+++ b/drivers/acpi/Makefile
@@ -23,7 +23,11 @@ acpi-y				+= nvs.o
 
 # Power management related files
 acpi-y				+= wakeup.o
+ifeq ($(ARCH), arm64)
+acpi-y				+= sleep-arm.o
+else # X86, IA64
 acpi-y				+= sleep.o
+endif
 acpi-y				+= device_pm.o
 acpi-$(CONFIG_ACPI_SLEEP)	+= proc.o
 
@@ -39,7 +43,7 @@ acpi-y				+= processor_core.o
 acpi-$(CONFIG_ARCH_MIGHT_HAVE_ACPI_PDC) += processor_pdc.o
 acpi-y				+= ec.o
 acpi-$(CONFIG_ACPI_DOCK)	+= dock.o
-acpi-y				+= pci_root.o pci_link.o pci_irq.o
+acpi-$(CONFIG_PCI)		+= pci_root.o pci_link.o pci_irq.o
 acpi-y				+= acpi_lpss.o
 acpi-y				+= acpi_platform.o
 acpi-y				+= acpi_pnp.o
diff --git a/drivers/acpi/bus.c b/drivers/acpi/bus.c
index 8b67bd0..c412fdb 100644
--- a/drivers/acpi/bus.c
+++ b/drivers/acpi/bus.c
@@ -448,6 +448,9 @@ static int __init acpi_bus_init_irq(void)
 	case ACPI_IRQ_MODEL_IOSAPIC:
 		message = "IOSAPIC";
 		break;
+	case ACPI_IRQ_MODEL_GIC:
+		message = "GIC";
+		break;
 	case ACPI_IRQ_MODEL_PLATFORM:
 		message = "platform specific model";
 		break;
diff --git a/drivers/acpi/internal.h b/drivers/acpi/internal.h
index 163e82f..c5ff8ba 100644
--- a/drivers/acpi/internal.h
+++ b/drivers/acpi/internal.h
@@ -26,8 +26,13 @@
 acpi_status acpi_os_initialize1(void);
 int init_acpi_device_notify(void);
 int acpi_scan_init(void);
+#ifdef CONFIG_PCI
 void acpi_pci_root_init(void);
 void acpi_pci_link_init(void);
+#else
+static inline void acpi_pci_root_init(void) {}
+static inline void acpi_pci_link_init(void) {}
+#endif
 void acpi_processor_init(void);
 void acpi_platform_init(void);
 void acpi_pnp_init(void);
diff --git a/drivers/acpi/osl.c b/drivers/acpi/osl.c
index f9eeae8..581b9f7 100644
--- a/drivers/acpi/osl.c
+++ b/drivers/acpi/osl.c
@@ -336,11 +336,11 @@ acpi_map_lookup_virt(void __iomem *virt, acpi_size size)
 	return NULL;
 }
 
-#ifndef CONFIG_IA64
-#define should_use_kmap(pfn)   page_is_ram(pfn)
-#else
+#if defined(CONFIG_IA64) || defined(CONFIG_ARM) || defined(CONFIG_ARM64)
 /* ioremap will take care of cache attributes */
 #define should_use_kmap(pfn)   0
+#else
+#define should_use_kmap(pfn)   page_is_ram(pfn)
 #endif
 
 static void __iomem *acpi_map(acpi_physical_address pg_off, unsigned long pg_sz)
diff --git a/drivers/acpi/processor_core.c b/drivers/acpi/processor_core.c
index 342942f..734c029 100644
--- a/drivers/acpi/processor_core.c
+++ b/drivers/acpi/processor_core.c
@@ -64,6 +64,38 @@ static int map_lsapic_id(struct acpi_subtable_header *entry,
 	return 0;
 }
 
+/*
+ * On ARM platform, MPIDR value is the hardware ID as apic ID
+ * on Intel platforms
+ */
+static int map_gicc_mpidr(struct acpi_subtable_header *entry,
+		int device_declaration, u32 acpi_id, int *mpidr)
+{
+	struct acpi_madt_generic_interrupt *gicc =
+	    container_of(entry, struct acpi_madt_generic_interrupt, header);
+
+	if (!(gicc->flags & ACPI_MADT_ENABLED))
+		return -ENODEV;
+
+	/* In the GIC interrupt model, logical processors are
+	 * required to have a Processor Device object in the DSDT,
+	 * so we should check device_declaration here
+	 */
+	if (device_declaration && (gicc->uid == acpi_id)) {
+		/*
+		 * Only bits [0:7] Aff0, bits [8:15] Aff1, bits [16:23] Aff2
+		 * and bits [32:39] Aff3 are meaningful, so pack the Affx
+		 * fields into a single 32 bit identifier to accommodate the
+		 * acpi processor drivers.
+		 */
+		*mpidr = ((gicc->arm_mpidr & 0xff00000000) >> 8)
+			 | gicc->arm_mpidr;
+		return 0;
+	}
+
+	return -EINVAL;
+}
+
 static int map_madt_entry(int type, u32 acpi_id)
 {
 	unsigned long madt_end, entry;
@@ -99,6 +131,9 @@ static int map_madt_entry(int type, u32 acpi_id)
 		} else if (header->type == ACPI_MADT_TYPE_LOCAL_SAPIC) {
 			if (!map_lsapic_id(header, type, acpi_id, &phys_id))
 				break;
+		} else if (header->type == ACPI_MADT_TYPE_GENERIC_INTERRUPT) {
+			if (!map_gicc_mpidr(header, type, acpi_id, &phys_id))
+				break;
 		}
 		entry += header->length;
 	}
@@ -131,6 +166,8 @@ static int map_mat_entry(acpi_handle handle, int type, u32 acpi_id)
 		map_lsapic_id(header, type, acpi_id, &phys_id);
 	else if (header->type == ACPI_MADT_TYPE_LOCAL_X2APIC)
 		map_x2apic_id(header, type, acpi_id, &phys_id);
+	else if (header->type == ACPI_MADT_TYPE_GENERIC_INTERRUPT)
+		map_gicc_mpidr(header, type, acpi_id, &phys_id);
 
 exit:
 	kfree(buffer.pointer);
diff --git a/drivers/acpi/sleep-arm.c b/drivers/acpi/sleep-arm.c
new file mode 100644
index 0000000..54578ef
--- /dev/null
+++ b/drivers/acpi/sleep-arm.c
@@ -0,0 +1,28 @@
+/*
+ *  ARM64 Specific Sleep Functionality
+ *
+ *  Copyright (C) 2013-2014, Linaro Ltd.
+ *      Author: Graeme Gregory <graeme.gregory@linaro.org>
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License version 2 as
+ *  published by the Free Software Foundation.
+ */
+
+#include <linux/acpi.h>
+
+/*
+ * Currently the ACPI 5.1 standard does not define S states in a
+ * manner which is usable for ARM64. These two stubs are sufficient
+ * that system initialises and device PM works.
+ */
+u32 acpi_target_system_state(void)
+{
+	return ACPI_STATE_S0;
+}
+EXPORT_SYMBOL_GPL(acpi_target_system_state);
+
+int __init acpi_sleep_init(void)
+{
+	return -ENOSYS;
+}
diff --git a/drivers/acpi/tables.c b/drivers/acpi/tables.c
index 93b8152..122b48f 100644
--- a/drivers/acpi/tables.c
+++ b/drivers/acpi/tables.c
@@ -183,6 +183,49 @@ void acpi_table_print_madt_entry(struct acpi_subtable_header *header)
 		}
 		break;
 
+	case ACPI_MADT_TYPE_GENERIC_INTERRUPT:
+		{
+			struct acpi_madt_generic_interrupt *p =
+				(struct acpi_madt_generic_interrupt *)header;
+			pr_info("GICC (acpi_id[0x%04x] address[%p] MPDIR[0x%llx] %s)\n",
+				p->uid, (void *)(unsigned long)p->base_address,
+				p->arm_mpidr,
+				(p->flags & ACPI_MADT_ENABLED) ? "enabled" : "disabled");
+
+		}
+		break;
+
+	case ACPI_MADT_TYPE_GENERIC_DISTRIBUTOR:
+		{
+			struct acpi_madt_generic_distributor *p =
+				(struct acpi_madt_generic_distributor *)header;
+			pr_info("GIC Distributor (gic_id[0x%04x] address[%p] gsi_base[%d])\n",
+				p->gic_id,
+				(void *)(unsigned long)p->base_address,
+				p->global_irq_base);
+		}
+		break;
+
+	case ACPI_MADT_TYPE_GENERIC_MSI_FRAME:
+		{
+			struct acpi_madt_generic_msi_frame *p =
+				(struct acpi_madt_generic_msi_frame *)header;
+			pr_info("GIC MSI Frame (msi_fame_id[%d] address[%p])\n",
+				p->msi_frame_id,
+				(void *)(unsigned long)p->base_address);
+		}
+		break;
+
+	case ACPI_MADT_TYPE_GENERIC_REDISTRIBUTOR:
+		{
+			struct acpi_madt_generic_redistributor *p =
+				(struct acpi_madt_generic_redistributor *)header;
+			pr_info("GIC Redistributor (address[%p] region_size[0x%x])\n",
+				(void *)(unsigned long)p->base_address,
+				p->length);
+		}
+		break;
+
 	default:
 		pr_warn("Found unsupported MADT entry (type = 0x%x)\n",
 			header->type);
@@ -210,7 +253,7 @@ acpi_parse_entries(char *id, unsigned long table_size,
 		return -EINVAL;
 
 	if (!table_header) {
-		pr_warn("%4.4s not present\n", id);
+		pr_warn("Table header not present\n");
 		return -ENODEV;
 	}
 
@@ -246,7 +289,8 @@ acpi_parse_entries(char *id, unsigned long table_size,
 
 	if (max_entries && count > max_entries) {
 		pr_warn("[%4.4s:0x%02x] ignored %i entries of %i found\n",
-			id, entry_id, count - max_entries, count);
+			table_header->signature, entry_id, count - max_entries,
+			count);
 	}
 
 	return count;
diff --git a/drivers/acpi/utils.c b/drivers/acpi/utils.c
index cd49a39..7f68f96 100644
--- a/drivers/acpi/utils.c
+++ b/drivers/acpi/utils.c
@@ -712,3 +712,29 @@ bool acpi_check_dsm(acpi_handle handle, const u8 *uuid, int rev, u64 funcs)
 	return false;
 }
 EXPORT_SYMBOL(acpi_check_dsm);
+
+/**
+ * acpi_check_coherency - check for memory coherency of a device
+ * @handle: ACPI device handle
+ * @val:    Pointer to returned value
+ *
+ * Search a device and its parents for a _CCA method and return
+ * its value.
+ */
+acpi_status acpi_check_coherency(acpi_handle handle, int *val)
+{
+	unsigned long long data;
+	acpi_status status;
+
+	do {
+		status = acpi_evaluate_integer(handle, "_CCA", NULL, &data);
+		if (!ACPI_FAILURE(status)) {
+			*val = data;
+			break;
+		}
+		status = acpi_get_parent(handle, &handle);
+	} while (!ACPI_FAILURE(status));
+
+	return status;
+}
+EXPORT_SYMBOL(acpi_check_coherency);
diff --git a/drivers/ata/Kconfig b/drivers/ata/Kconfig
index a3a1360..edca892 100644
--- a/drivers/ata/Kconfig
+++ b/drivers/ata/Kconfig
@@ -48,7 +48,7 @@ config ATA_VERBOSE_ERROR
 
 config ATA_ACPI
 	bool "ATA ACPI Support"
-	depends on ACPI && PCI
+	depends on ACPI
 	default y
 	help
 	  This option adds support for ATA-related ACPI objects.
diff --git a/drivers/ata/ahci_platform.c b/drivers/ata/ahci_platform.c
index 18d5398..999e577 100644
--- a/drivers/ata/ahci_platform.c
+++ b/drivers/ata/ahci_platform.c
@@ -20,6 +20,9 @@
 #include <linux/platform_device.h>
 #include <linux/libata.h>
 #include <linux/ahci_platform.h>
+#ifdef CONFIG_ATA_ACPI
+#include <linux/acpi.h>
+#endif
 #include "ahci.h"
 
 static const struct ata_port_info ahci_port_info = {
@@ -71,12 +74,22 @@ static const struct of_device_id ahci_of_match[] = {
 };
 MODULE_DEVICE_TABLE(of, ahci_of_match);
 
+#ifdef CONFIG_ATA_ACPI
+static const struct acpi_device_id ahci_acpi_match[] = {
+	{ "AMDI0600", 0 }, /* AMD Seattle AHCI */
+	{ },
+};
+#endif
+
 static struct platform_driver ahci_driver = {
 	.probe = ahci_probe,
 	.remove = ata_platform_remove_one,
 	.driver = {
 		.name = "ahci",
 		.of_match_table = ahci_of_match,
+#ifdef CONFIG_ATA_ACPI
+		.acpi_match_table = ACPI_PTR(ahci_acpi_match),
+#endif
 		.pm = &ahci_pm_ops,
 	},
 };
diff --git a/drivers/ata/ahci_xgene.c b/drivers/ata/ahci_xgene.c
index feeb8f1..8f82267 100644
--- a/drivers/ata/ahci_xgene.c
+++ b/drivers/ata/ahci_xgene.c
@@ -28,6 +28,7 @@
 #include <linux/of_address.h>
 #include <linux/of_irq.h>
 #include <linux/phy/phy.h>
+#include <linux/acpi.h>
 #include "ahci.h"
 
 /* Max # of disk per a controller */
@@ -148,14 +150,6 @@ static unsigned int xgene_ahci_qc_issue(struct ata_queued_cmd *qc)
 	return rc;
 }
 
-static bool xgene_ahci_is_memram_inited(struct xgene_ahci_context *ctx)
-{
-	void __iomem *diagcsr = ctx->csr_diag;
-
-	return (readl(diagcsr + CFG_MEM_RAM_SHUTDOWN) == 0 &&
-	        readl(diagcsr + BLOCK_MEM_RDY) == 0xFFFFFFFF);
-}
-
 /**
  * xgene_ahci_read_id - Read ID data from the specified device
  * @dev: device
@@ -501,11 +495,6 @@ static int xgene_ahci_probe(struct platform_device *pdev)
 		return -ENODEV;
 	}
 
-	if (xgene_ahci_is_memram_inited(ctx)) {
-		dev_info(dev, "skip clock and PHY initialization\n");
-		goto skip_clk_phy;
-	}
-
 	/* Due to errata, HW requires full toggle transition */
 	rc = ahci_platform_enable_clks(hpriv);
 	if (rc)
@@ -518,7 +507,7 @@ static int xgene_ahci_probe(struct platform_device *pdev)
 
 	/* Configure the host controller */
 	xgene_ahci_hw_init(hpriv);
-skip_clk_phy:
+
 	hpriv->flags = AHCI_HFLAG_NO_PMP | AHCI_HFLAG_NO_NCQ;
 
 	rc = ahci_platform_init_host(pdev, hpriv, &xgene_ahci_port_info);
@@ -533,6 +522,16 @@ disable_resources:
 	return rc;
 }
 
+#ifdef CONFIG_ACPI
+static const struct acpi_device_id xgene_ahci_acpi_match[] = {
+	{ "APMC0D00", },
+	{ "APMC0D0D", },
+	{ "APMC0D09", },
+	{ }
+};
+MODULE_DEVICE_TABLE(acpi, xgene_ahci_acpi_match);
+#endif
+
 static const struct of_device_id xgene_ahci_of_match[] = {
 	{.compatible = "apm,xgene-ahci"},
 	{},
@@ -545,6 +544,7 @@ static struct platform_driver xgene_ahci_driver = {
 	.driver = {
 		.name = "xgene-ahci",
 		.of_match_table = xgene_ahci_of_match,
+		.acpi_match_table = ACPI_PTR(xgene_ahci_acpi_match),
 	},
 };
 
diff --git a/drivers/clocksource/arm_arch_timer.c b/drivers/clocksource/arm_arch_timer.c
index 095c177..fd5ebbf 100644
--- a/drivers/clocksource/arm_arch_timer.c
+++ b/drivers/clocksource/arm_arch_timer.c
@@ -21,6 +21,7 @@
 #include <linux/io.h>
 #include <linux/slab.h>
 #include <linux/sched_clock.h>
+#include <linux/acpi.h>
 
 #include <asm/arch_timer.h>
 #include <asm/virt.h>
@@ -61,7 +62,8 @@ enum ppi_nr {
 	MAX_TIMER_PPI
 };
 
-static int arch_timer_ppi[MAX_TIMER_PPI];
+int arch_timer_ppi[MAX_TIMER_PPI];
+EXPORT_SYMBOL(arch_timer_ppi);
 
 static struct clock_event_device __percpu *arch_timer_evt;
 
@@ -370,8 +372,12 @@ arch_timer_detect_rate(void __iomem *cntbase, struct device_node *np)
 	if (arch_timer_rate)
 		return;
 
-	/* Try to determine the frequency from the device tree or CNTFRQ */
-	if (of_property_read_u32(np, "clock-frequency", &arch_timer_rate)) {
+	/*
+	 * Try to determine the frequency from the device tree or CNTFRQ,
+	 * if ACPI is enabled, get the frequency from CNTFRQ ONLY.
+	 */
+	if (!acpi_disabled ||
+	    of_property_read_u32(np, "clock-frequency", &arch_timer_rate)) {
 		if (cntbase)
 			arch_timer_rate = readl_relaxed(cntbase + CNTFRQ);
 		else
@@ -690,28 +696,8 @@ static void __init arch_timer_common_init(void)
 	arch_timer_arch_init();
 }
 
-static void __init arch_timer_init(struct device_node *np)
+static void __init arch_timer_init(void)
 {
-	int i;
-
-	if (arch_timers_present & ARCH_CP15_TIMER) {
-		pr_warn("arch_timer: multiple nodes in dt, skipping\n");
-		return;
-	}
-
-	arch_timers_present |= ARCH_CP15_TIMER;
-	for (i = PHYS_SECURE_PPI; i < MAX_TIMER_PPI; i++)
-		arch_timer_ppi[i] = irq_of_parse_and_map(np, i);
-	arch_timer_detect_rate(NULL, np);
-
-	/*
-	 * If we cannot rely on firmware initializing the timer registers then
-	 * we should use the physical timers instead.
-	 */
-	if (IS_ENABLED(CONFIG_ARM) &&
-	    of_property_read_bool(np, "arm,cpu-registers-not-fw-configured"))
-			arch_timer_use_virtual = false;
-
 	/*
 	 * If HYP mode is available, we know that the physical timer
 	 * has been configured to be accessible from PL1. Use it, so
@@ -730,13 +716,39 @@ static void __init arch_timer_init(struct device_node *np)
 		}
 	}
 
-	arch_timer_c3stop = !of_property_read_bool(np, "always-on");
-
 	arch_timer_register();
 	arch_timer_common_init();
 }
-CLOCKSOURCE_OF_DECLARE(armv7_arch_timer, "arm,armv7-timer", arch_timer_init);
-CLOCKSOURCE_OF_DECLARE(armv8_arch_timer, "arm,armv8-timer", arch_timer_init);
+
+static void __init arch_timer_of_init(struct device_node *np)
+{
+	int i;
+
+	/*
+	 * If we cannot rely on firmware initializing the timer registers then
+	 * we should use the physical timers instead.
+	 */
+	if (IS_ENABLED(CONFIG_ARM) &&
+	    of_property_read_bool(np, "arm,cpu-registers-not-fw-configured"))
+			arch_timer_use_virtual = false;
+
+	if (arch_timers_present & ARCH_CP15_TIMER) {
+		pr_warn("arch_timer: multiple nodes in dt, skipping\n");
+		return;
+	}
+
+	arch_timers_present |= ARCH_CP15_TIMER;
+	for (i = PHYS_SECURE_PPI; i < MAX_TIMER_PPI; i++)
+		arch_timer_ppi[i] = irq_of_parse_and_map(np, i);
+
+	arch_timer_detect_rate(NULL, np);
+
+	arch_timer_c3stop = !of_property_read_bool(np, "always-on");
+
+	arch_timer_init();
+}
+CLOCKSOURCE_OF_DECLARE(armv7_arch_timer, "arm,armv7-timer", arch_timer_of_init);
+CLOCKSOURCE_OF_DECLARE(armv8_arch_timer, "arm,armv8-timer", arch_timer_of_init);
 
 static void __init arch_timer_mem_init(struct device_node *np)
 {
@@ -803,3 +815,71 @@ static void __init arch_timer_mem_init(struct device_node *np)
 }
 CLOCKSOURCE_OF_DECLARE(armv7_arch_timer_mem, "arm,armv7-timer-mem",
 		       arch_timer_mem_init);
+
+#ifdef CONFIG_ACPI
+static int __init
+map_generic_timer_interrupt(u32 interrupt, u32 flags)
+{
+	int trigger, polarity;
+
+	if (!interrupt)
+		return 0;
+
+	trigger = (flags & ACPI_GTDT_INTERRUPT_MODE) ? ACPI_EDGE_SENSITIVE
+			: ACPI_LEVEL_SENSITIVE;
+
+	polarity = (flags & ACPI_GTDT_INTERRUPT_POLARITY) ? ACPI_ACTIVE_LOW
+			: ACPI_ACTIVE_HIGH;
+
+	return acpi_register_gsi(NULL, interrupt, trigger, polarity);
+}
+
+/* Initialize per-processor generic timer */
+static int __init arch_timer_acpi_init(struct acpi_table_header *table)
+{
+	struct acpi_table_gtdt *gtdt;
+
+	if (arch_timers_present & ARCH_CP15_TIMER) {
+		pr_warn("arch_timer: already initialized, skipping\n");
+		return -EINVAL;
+	}
+
+	gtdt = container_of(table, struct acpi_table_gtdt, header);
+
+	arch_timers_present |= ARCH_CP15_TIMER;
+
+	arch_timer_ppi[PHYS_SECURE_PPI] =
+		map_generic_timer_interrupt(gtdt->secure_el1_interrupt,
+		gtdt->secure_el1_flags);
+
+	arch_timer_ppi[PHYS_NONSECURE_PPI] =
+		map_generic_timer_interrupt(gtdt->non_secure_el1_interrupt,
+		gtdt->non_secure_el1_flags);
+
+	arch_timer_ppi[VIRT_PPI] =
+		map_generic_timer_interrupt(gtdt->virtual_timer_interrupt,
+		gtdt->virtual_timer_flags);
+
+	arch_timer_ppi[HYP_PPI] =
+		map_generic_timer_interrupt(gtdt->non_secure_el2_interrupt,
+		gtdt->non_secure_el2_flags);
+
+	/* Get the frequency from CNTFRQ */
+	arch_timer_detect_rate(NULL, NULL);
+
+	/* Always-on capability */
+	arch_timer_c3stop = !(gtdt->non_secure_el1_flags & ACPI_GTDT_ALWAYS_ON);
+
+	arch_timer_init();
+	return 0;
+}
+
+/* Initialize all the generic timers presented in GTDT */
+void __init acpi_generic_timer_init(void)
+{
+	if (acpi_disabled)
+		return;
+
+	acpi_table_parse(ACPI_SIG_GTDT, arch_timer_acpi_init);
+}
+#endif
diff --git a/drivers/input/keyboard/gpio_keys_polled.c b/drivers/input/keyboard/gpio_keys_polled.c
index 90df4df..c9c1c8c 100644
--- a/drivers/input/keyboard/gpio_keys_polled.c
+++ b/drivers/input/keyboard/gpio_keys_polled.c
@@ -297,6 +297,7 @@ static struct platform_driver gpio_keys_polled_driver = {
 	.probe	= gpio_keys_polled_probe,
 	.driver	= {
 		.name	= DRV_NAME,
+		.owner	= THIS_MODULE,
 		.of_match_table = gpio_keys_polled_of_match,
 	},
 };
diff --git a/drivers/iommu/arm-smmu.c b/drivers/iommu/arm-smmu.c
index 6cd47b7..09f904a 100644
--- a/drivers/iommu/arm-smmu.c
+++ b/drivers/iommu/arm-smmu.c
@@ -451,7 +451,10 @@ static struct device_node *dev_get_dev_node(struct device *dev)
 
 		while (!pci_is_root_bus(bus))
 			bus = bus->parent;
-		return bus->bridge->parent->of_node;
+		if (bus->bridge->parent)
+			return bus->bridge->parent->of_node;
+		else
+			return NULL;
 	}
 
 	return dev->of_node;
@@ -567,6 +570,9 @@ static struct arm_smmu_device *find_smmu_for_device(struct device *dev)
 	struct arm_smmu_master *master = NULL;
 	struct device_node *dev_node = dev_get_dev_node(dev);
 
+	if (!dev_node)
+		return NULL;
+
 	spin_lock(&arm_smmu_devices_lock);
 	list_for_each_entry(smmu, &arm_smmu_devices, list) {
 		master = find_smmu_master(smmu, dev_node);
diff --git a/drivers/irqchip/irq-gic-v3.c b/drivers/irqchip/irq-gic-v3.c
index 1a146cc..ab7dfe2 100644
--- a/drivers/irqchip/irq-gic-v3.c
+++ b/drivers/irqchip/irq-gic-v3.c
@@ -520,9 +520,19 @@ static void gic_raise_softirq(const struct cpumask *mask, unsigned int irq)
 	isb();
 }
 
+#ifdef CONFIG_ARM_PARKING_PROTOCOL
+static void gic_wakeup_parked_cpu(int cpu)
+{
+	gic_raise_softirq(cpumask_of(cpu), 0);
+}
+#endif
+
 static void gic_smp_init(void)
 {
 	set_smp_cross_call(gic_raise_softirq);
+#ifdef CONFIG_ARM_PARKING_PROTOCOL
+	set_smp_boot_wakeup_call(gic_wakeup_parked_cpu);
+#endif
 	register_cpu_notifier(&gic_cpu_notifier);
 }
 
diff --git a/drivers/irqchip/irq-gic.c b/drivers/irqchip/irq-gic.c
index d617ee5..da0cd51 100644
--- a/drivers/irqchip/irq-gic.c
+++ b/drivers/irqchip/irq-gic.c
@@ -33,12 +33,14 @@
 #include <linux/of.h>
 #include <linux/of_address.h>
 #include <linux/of_irq.h>
+#include <linux/acpi.h>
 #include <linux/irqdomain.h>
 #include <linux/interrupt.h>
 #include <linux/percpu.h>
 #include <linux/slab.h>
 #include <linux/irqchip/chained_irq.h>
 #include <linux/irqchip/arm-gic.h>
+#include <linux/irqchip/arm-gic-acpi.h>
 
 #include <asm/cputype.h>
 #include <asm/irq.h>
@@ -641,6 +643,13 @@ static void gic_raise_softirq(const struct cpumask *mask, unsigned int irq)
 
 	raw_spin_unlock_irqrestore(&irq_controller_lock, flags);
 }
+
+#ifdef CONFIG_ARM_PARKING_PROTOCOL
+static void gic_wakeup_parked_cpu(int cpu)
+{
+	gic_raise_softirq(cpumask_of(cpu), GIC_DIST_SOFTINT_NSATT);
+}
+#endif
 #endif
 
 #ifdef CONFIG_BL_SWITCHER
@@ -1025,6 +1034,9 @@ void __init gic_init_bases(unsigned int gic_nr, int irq_start,
 #ifdef CONFIG_SMP
 		set_smp_cross_call(gic_raise_softirq);
 		register_cpu_notifier(&gic_cpu_notifier);
+#ifdef CONFIG_ARM_PARKING_PROTOCOL
+		set_smp_boot_wakeup_call(gic_wakeup_parked_cpu);
+#endif
 #endif
 		set_handle_irq(gic_handle_irq);
 	}
@@ -1083,3 +1095,109 @@ IRQCHIP_DECLARE(msm_8660_qgic, "qcom,msm-8660-qgic", gic_of_init);
 IRQCHIP_DECLARE(msm_qgic2, "qcom,msm-qgic2", gic_of_init);
 
 #endif
+
+#ifdef CONFIG_ACPI
+static phys_addr_t dist_phy_base, cpu_phy_base;
+static int cpu_base_assigned;
+
+static int __init
+gic_acpi_parse_madt_cpu(struct acpi_subtable_header *header,
+			const unsigned long end)
+{
+	struct acpi_madt_generic_interrupt *processor;
+	phys_addr_t gic_cpu_base;
+
+	processor = (struct acpi_madt_generic_interrupt *)header;
+
+	if (BAD_MADT_ENTRY(processor, end))
+		return -EINVAL;
+
+	/*
+	 * There is no support for non-banked GICv1/2 register in ACPI spec.
+	 * All CPU interface addresses have to be the same.
+	 */
+	gic_cpu_base = processor->base_address;
+	if (cpu_base_assigned && gic_cpu_base != cpu_phy_base)
+		return -EFAULT;
+
+	cpu_phy_base = gic_cpu_base;
+	cpu_base_assigned = 1;
+	return 0;
+}
+
+static int __init
+gic_acpi_parse_madt_distributor(struct acpi_subtable_header *header,
+				const unsigned long end)
+{
+	struct acpi_madt_generic_distributor *dist;
+
+	dist = (struct acpi_madt_generic_distributor *)header;
+
+	if (BAD_MADT_ENTRY(dist, end))
+		return -EINVAL;
+
+	dist_phy_base = dist->base_address;
+	return 0;
+}
+
+int __init
+gic_v2_acpi_init(struct acpi_table_header *table)
+{
+	void __iomem *cpu_base, *dist_base;
+	int count;
+
+	/* Collect CPU base addresses */
+	count = acpi_parse_entries(ACPI_SIG_MADT,
+				   sizeof(struct acpi_table_madt),
+				   gic_acpi_parse_madt_cpu, table,
+				   ACPI_MADT_TYPE_GENERIC_INTERRUPT, 0);
+	if (count < 0) {
+		pr_err("Error during GICC entries parsing\n");
+		return -EFAULT;
+	} else if (!count) {
+		pr_err("No valid GICC entries exist\n");
+		return -EINVAL;
+	}
+
+	/*
+	 * Find distributor base address. We expect one distributor entry since
+	 * ACPI 5.1 spec neither support multi-GIC instances nor GIC cascade.
+	 */
+	count = acpi_parse_entries(ACPI_SIG_MADT,
+				   sizeof(struct acpi_table_madt),
+				   gic_acpi_parse_madt_distributor, table,
+				   ACPI_MADT_TYPE_GENERIC_DISTRIBUTOR, 0);
+	if (count <= 0) {
+		pr_err("Error during GICD entries parsing\n");
+		return -EFAULT;
+	} else if (!count) {
+		pr_err("No valid GICD entries exist\n");
+		return -EINVAL;
+	} else if (count > 1) {
+		pr_err("More than one GICD entry detected\n");
+		return -EINVAL;
+	}
+
+	cpu_base = ioremap(cpu_phy_base, ACPI_GIC_CPU_IF_MEM_SIZE);
+	if (!cpu_base) {
+		pr_err("Unable to map GICC registers\n");
+		return -ENOMEM;
+	}
+
+	dist_base = ioremap(dist_phy_base, ACPI_GICV2_DIST_MEM_SIZE);
+	if (!dist_base) {
+		pr_err("Unable to map GICD registers\n");
+		iounmap(cpu_base);
+		return -ENOMEM;
+	}
+
+	/*
+	 * Initialize zero GIC instance (no multi-GIC support). Also, set GIC
+	 * as default IRQ domain to allow for GSI registration and GSI to IRQ
+	 * number translation (see acpi_register_gsi() and acpi_gsi_to_irq()).
+	 */
+	gic_init_bases(0, -1, dist_base, cpu_base, 0, NULL);
+	irq_set_default_host(gic_data[0].domain);
+	return 0;
+}
+#endif
diff --git a/drivers/irqchip/irqchip.c b/drivers/irqchip/irqchip.c
index 0fe2f71..9106c6d 100644
--- a/drivers/irqchip/irqchip.c
+++ b/drivers/irqchip/irqchip.c
@@ -11,6 +11,7 @@
 #include <linux/init.h>
 #include <linux/of_irq.h>
 #include <linux/irqchip.h>
+#include <linux/irqchip/arm-gic-acpi.h>
 
 /*
  * This special of_device_id is the sentinel at the end of the
@@ -26,4 +27,6 @@ extern struct of_device_id __irqchip_of_table[];
 void __init irqchip_init(void)
 {
 	of_irq_init(__irqchip_of_table);
+
+	acpi_gic_init();
 }
diff --git a/drivers/leds/leds-gpio.c b/drivers/leds/leds-gpio.c
index 7ea1ea42..5fb4440 100644
--- a/drivers/leds/leds-gpio.c
+++ b/drivers/leds/leds-gpio.c
@@ -291,6 +291,7 @@ static struct platform_driver gpio_led_driver = {
 	.remove		= gpio_led_remove,
 	.driver		= {
 		.name	= "leds-gpio",
+		.owner	= THIS_MODULE,
 		.of_match_table = of_gpio_leds_match,
 	},
 };
diff --git a/drivers/net/ethernet/amd/xgbe/xgbe-dev.c b/drivers/net/ethernet/amd/xgbe/xgbe-dev.c
index 53f5f66..3957e63 100644
--- a/drivers/net/ethernet/amd/xgbe/xgbe-dev.c
+++ b/drivers/net/ethernet/amd/xgbe/xgbe-dev.c
@@ -130,7 +130,7 @@ static unsigned int xgbe_usec_to_riwt(struct xgbe_prv_data *pdata,
 
 	DBGPR("-->xgbe_usec_to_riwt\n");
 
-	rate = clk_get_rate(pdata->sysclk);
+	rate = pdata->sysclk_rate;
 
 	/*
 	 * Convert the input usec value to the watchdog timer value. Each
@@ -153,7 +153,7 @@ static unsigned int xgbe_riwt_to_usec(struct xgbe_prv_data *pdata,
 
 	DBGPR("-->xgbe_riwt_to_usec\n");
 
-	rate = clk_get_rate(pdata->sysclk);
+	rate = pdata->sysclk_rate;
 
 	/*
 	 * Convert the input watchdog timer value to the usec value. Each
@@ -854,6 +854,18 @@ static int xgbe_read_mmd_regs(struct xgbe_prv_data *pdata, int prtad,
 	else
 		mmd_address = (pdata->mdio_mmd << 16) | (mmd_reg & 0xffff);
 
+	if (XGBE_SEATTLE_A0) {
+		/* The PCS implementation has reversed the devices in
+		 * package registers so we need to change 05 to 06 and
+		 * 06 to 05 if being read (these registers are readonly
+		 * so no need to do this in the write function)
+		 */
+		if ((mmd_address & 0xffff) == 0x05)
+			mmd_address = (mmd_address & ~0xffff) | 0x06;
+		else if ((mmd_address & 0xffff) == 0x06)
+			mmd_address = (mmd_address & ~0xffff) | 0x05;
+	}
+
 	/* The PCS registers are accessed using mmio. The underlying APB3
 	 * management interface uses indirect addressing to access the MMD
 	 * register sets. This requires accessing of the PCS register in two
diff --git a/drivers/net/ethernet/amd/xgbe/xgbe-main.c b/drivers/net/ethernet/amd/xgbe/xgbe-main.c
index dbd3850..74be78e 100644
--- a/drivers/net/ethernet/amd/xgbe/xgbe-main.c
+++ b/drivers/net/ethernet/amd/xgbe/xgbe-main.c
@@ -124,6 +124,7 @@
 #include <linux/of.h>
 #include <linux/of_net.h>
 #include <linux/clk.h>
+#include <linux/acpi.h>
 
 #include "xgbe.h"
 #include "xgbe-common.h"
@@ -161,6 +162,205 @@ static void xgbe_init_all_fptrs(struct xgbe_prv_data *pdata)
 	xgbe_init_function_ptrs_desc(&pdata->desc_if);
 }
 
+static int xgbe_map_resources(struct xgbe_prv_data *pdata)
+{
+	struct platform_device *pdev = pdata->pdev;
+	struct device *dev = pdata->dev;
+	struct resource *res;
+
+	/* Obtain the mmio areas for the device */
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	pdata->xgmac_regs = devm_ioremap_resource(dev, res);
+	if (IS_ERR(pdata->xgmac_regs)) {
+		dev_err(dev, "xgmac ioremap failed\n");
+		return PTR_ERR(pdata->xgmac_regs);
+	}
+	DBGPR("  xgmac_regs = %p\n", pdata->xgmac_regs);
+
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
+	pdata->xpcs_regs = devm_ioremap_resource(dev, res);
+	if (IS_ERR(pdata->xpcs_regs)) {
+		dev_err(dev, "xpcs ioremap failed\n");
+		return PTR_ERR(pdata->xpcs_regs);
+	}
+	DBGPR("  xpcs_regs  = %p\n", pdata->xpcs_regs);
+
+	return 0;
+}
+
+#ifdef CONFIG_ACPI
+static int xgbe_acpi_support(struct xgbe_prv_data *pdata)
+{
+	struct acpi_device *adev = pdata->adev;
+	struct device *dev = pdata->dev;
+	const union acpi_object *property;
+	acpi_status status;
+	u64 cca;
+	unsigned int i;
+	int ret;
+
+	/* Map the memory resources */
+	ret = xgbe_map_resources(pdata);
+	if (ret)
+		return ret;
+
+	/* Obtain the system clock setting */
+	ret = acpi_dev_get_property(adev, XGBE_ACPI_DMA_FREQ, ACPI_TYPE_INTEGER,
+				    &property);
+	if (ret) {
+		dev_err(dev, "unable to obtain %s acpi property\n",
+			XGBE_ACPI_DMA_FREQ);
+		return ret;
+	}
+	pdata->sysclk_rate = property->integer.value;
+
+	/* Obtain the PTP clock setting */
+	ret = acpi_dev_get_property(adev, XGBE_ACPI_PTP_FREQ, ACPI_TYPE_INTEGER,
+				    &property);
+	if (ret) {
+		dev_err(dev, "unable to obtain %s acpi property\n",
+			XGBE_ACPI_PTP_FREQ);
+		return ret;
+	}
+	pdata->ptpclk_rate = property->integer.value;
+
+	/* Retrieve the MAC address */
+	ret = acpi_dev_get_property_array(adev, XGBE_ACPI_MAC_ADDR,
+					  ACPI_TYPE_INTEGER, &property);
+	if (ret) {
+		dev_err(dev, "unable to obtain %s acpi property\n",
+			XGBE_ACPI_MAC_ADDR);
+		return ret;
+	}
+	if (property->package.count != 6) {
+		dev_err(dev, "invalid %s acpi property\n",
+			XGBE_ACPI_MAC_ADDR);
+		return -EINVAL;
+	}
+	for (i = 0; i < property->package.count; i++) {
+		union acpi_object *obj = &property->package.elements[i];
+
+		pdata->mac_addr[i] = (u8)obj->integer.value;
+	}
+	if (!is_valid_ether_addr(pdata->mac_addr)) {
+		dev_err(dev, "invalid %s acpi property\n",
+			XGBE_ACPI_MAC_ADDR);
+		return -EINVAL;
+	}
+
+	/* Retrieve the PHY mode - it must be "xgmii" */
+	ret = acpi_dev_get_property(adev, XGBE_ACPI_PHY_MODE, ACPI_TYPE_STRING,
+				    &property);
+	if (ret) {
+		dev_err(dev, "unable to obtain %s acpi property\n",
+			XGBE_ACPI_PHY_MODE);
+		return ret;
+	}
+	if (strcmp(property->string.pointer,
+		   phy_modes(PHY_INTERFACE_MODE_XGMII))) {
+		dev_err(dev, "invalid %s acpi property\n",
+			XGBE_ACPI_PHY_MODE);
+		return -EINVAL;
+	}
+	pdata->phy_mode = PHY_INTERFACE_MODE_XGMII;
+
+#ifndef METHOD_NAME__CCA
+#define METHOD_NAME__CCA "_CCA"
+#endif
+	/* Set the device cache coherency values */
+	if (acpi_has_method(adev->handle, METHOD_NAME__CCA)) {
+		status = acpi_evaluate_integer(adev->handle, METHOD_NAME__CCA,
+					       NULL, &cca);
+		if (ACPI_FAILURE(status)) {
+			dev_err(dev, "error obtaining acpi _CCA method\n");
+			return -EINVAL;
+		}
+	} else {
+		cca = 0;
+	}
+
+	if (cca) {
+		pdata->axdomain = XGBE_DMA_OS_AXDOMAIN;
+		pdata->arcache = XGBE_DMA_OS_ARCACHE;
+		pdata->awcache = XGBE_DMA_OS_AWCACHE;
+	} else {
+		pdata->axdomain = XGBE_DMA_SYS_AXDOMAIN;
+		pdata->arcache = XGBE_DMA_SYS_ARCACHE;
+		pdata->awcache = XGBE_DMA_SYS_AWCACHE;
+	}
+
+	return 0;
+}
+#else   /* CONFIG_ACPI */
+static int xgbe_acpi_support(struct xgbe_prv_data *pdata)
+{
+	return -EINVAL;
+}
+#endif  /* CONFIG_ACPI */
+
+#ifdef CONFIG_OF
+static int xgbe_of_support(struct xgbe_prv_data *pdata)
+{
+	struct device *dev = pdata->dev;
+	const u8 *mac_addr;
+	int ret;
+
+	/* Map the memory resources */
+	ret = xgbe_map_resources(pdata);
+	if (ret)
+		return ret;
+
+	/* Obtain the system clock setting */
+	pdata->sysclk = devm_clk_get(dev, XGBE_DMA_CLOCK);
+	if (IS_ERR(pdata->sysclk)) {
+		dev_err(dev, "dma devm_clk_get failed\n");
+		return PTR_ERR(pdata->sysclk);
+	}
+	pdata->sysclk_rate = clk_get_rate(pdata->sysclk);
+
+	/* Obtain the PTP clock setting */
+	pdata->ptpclk = devm_clk_get(dev, XGBE_PTP_CLOCK);
+	if (IS_ERR(pdata->ptpclk)) {
+		dev_err(dev, "ptp devm_clk_get failed\n");
+		return PTR_ERR(pdata->ptpclk);
+	}
+	pdata->ptpclk_rate = clk_get_rate(pdata->ptpclk);
+
+	/* Retrieve the MAC address */
+	mac_addr = of_get_mac_address(dev->of_node);
+	if (!mac_addr) {
+		dev_err(dev, "invalid mac address for this device\n");
+		return -EINVAL;
+	}
+	memcpy(pdata->mac_addr, mac_addr, ETH_ALEN);
+
+	/* Retrieve the PHY mode - it must be "xgmii" */
+	pdata->phy_mode = of_get_phy_mode(dev->of_node);
+	if (pdata->phy_mode != PHY_INTERFACE_MODE_XGMII) {
+		dev_err(dev, "invalid phy-mode specified for this device\n");
+		return -EINVAL;
+	}
+
+	/* Set the device cache coherency values */
+	if (of_property_read_bool(dev->of_node, "dma-coherent")) {
+		pdata->axdomain = XGBE_DMA_OS_AXDOMAIN;
+		pdata->arcache = XGBE_DMA_OS_ARCACHE;
+		pdata->awcache = XGBE_DMA_OS_AWCACHE;
+	} else {
+		pdata->axdomain = XGBE_DMA_SYS_AXDOMAIN;
+		pdata->arcache = XGBE_DMA_SYS_ARCACHE;
+		pdata->awcache = XGBE_DMA_SYS_AWCACHE;
+	}
+
+	return 0;
+}
+#else   /* CONFIG_OF */
+static int xgbe_of_support(struct xgbe_prv_data *pdata)
+{
+	return -EINVAL;
+}
+#endif  /*CONFIG_OF */
+
 static int xgbe_probe(struct platform_device *pdev)
 {
 	struct xgbe_prv_data *pdata;
@@ -186,6 +386,7 @@ static int xgbe_probe(struct platform_device *pdev)
 	pdata = netdev_priv(netdev);
 	pdata->netdev = netdev;
 	pdata->pdev = pdev;
+	pdata->adev = ACPI_COMPANION(dev);
 	pdata->dev = dev;
 	platform_set_drvdata(pdev, netdev);
 
@@ -212,40 +413,13 @@ static int xgbe_probe(struct platform_device *pdev)
 		goto err_io;
 	}
 
-	/* Obtain the system clock setting */
-	pdata->sysclk = devm_clk_get(dev, XGBE_DMA_CLOCK);
-	if (IS_ERR(pdata->sysclk)) {
-		dev_err(dev, "dma devm_clk_get failed\n");
-		ret = PTR_ERR(pdata->sysclk);
-		goto err_io;
-	}
-
-	/* Obtain the PTP clock setting */
-	pdata->ptpclk = devm_clk_get(dev, XGBE_PTP_CLOCK);
-	if (IS_ERR(pdata->ptpclk)) {
-		dev_err(dev, "ptp devm_clk_get failed\n");
-		ret = PTR_ERR(pdata->ptpclk);
-		goto err_io;
-	}
-
-	/* Obtain the mmio areas for the device */
-	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	pdata->xgmac_regs = devm_ioremap_resource(dev, res);
-	if (IS_ERR(pdata->xgmac_regs)) {
-		dev_err(dev, "xgmac ioremap failed\n");
-		ret = PTR_ERR(pdata->xgmac_regs);
-		goto err_io;
-	}
-	DBGPR("  xgmac_regs = %p\n", pdata->xgmac_regs);
-
-	res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
-	pdata->xpcs_regs = devm_ioremap_resource(dev, res);
-	if (IS_ERR(pdata->xpcs_regs)) {
-		dev_err(dev, "xpcs ioremap failed\n");
-		ret = PTR_ERR(pdata->xpcs_regs);
+	/* Obtain device settings */
+	if (pdata->adev && !acpi_disabled)
+		ret = xgbe_acpi_support(pdata);
+	else
+		ret = xgbe_of_support(pdata);
+	if (ret)
 		goto err_io;
-	}
-	DBGPR("  xpcs_regs  = %p\n", pdata->xpcs_regs);
 
 	/* Set the DMA mask */
 	if (!dev->dma_mask)
@@ -275,10 +449,12 @@ static int xgbe_probe(struct platform_device *pdev)
 		dev_err(dev, "platform_get_irq 0 failed\n");
 		goto err_io;
 	}
+
 	pdata->dev_irq = ret;
 
 	netdev->irq = pdata->dev_irq;
 	netdev->base_addr = (unsigned long)pdata->xgmac_regs;
+	memcpy(netdev->dev_addr, pdata->mac_addr, netdev->addr_len);
 
 	/* Set all the function pointers */
 	xgbe_init_all_fptrs(pdata);
@@ -291,23 +467,6 @@ static int xgbe_probe(struct platform_device *pdev)
 	/* Populate the hardware features */
 	xgbe_get_all_hw_features(pdata);
 
-	/* Retrieve the MAC address */
-	mac_addr = of_get_mac_address(dev->of_node);
-	if (!mac_addr) {
-		dev_err(dev, "invalid mac address for this device\n");
-		ret = -EINVAL;
-		goto err_io;
-	}
-	memcpy(netdev->dev_addr, mac_addr, netdev->addr_len);
-
-	/* Retrieve the PHY mode - it must be "xgmii" */
-	pdata->phy_mode = of_get_phy_mode(dev->of_node);
-	if (pdata->phy_mode != PHY_INTERFACE_MODE_XGMII) {
-		dev_err(dev, "invalid phy-mode specified for this device\n");
-		ret = -EINVAL;
-		goto err_io;
-	}
-
 	/* Set default configuration data */
 	xgbe_default_config(pdata);
 
@@ -491,10 +650,22 @@ static int xgbe_resume(struct device *dev)
 }
 #endif /* CONFIG_PM */
 
+#ifdef CONFIG_ACPI
+static const struct acpi_device_id xgbe_acpi_match[] = {
+	{ "AMDI8000", 0 },
+	{},
+};
+
+MODULE_DEVICE_TABLE(acpi, xgbe_acpi_match);
+#endif
+
+#ifdef CONFIG_OF
 static const struct of_device_id xgbe_of_match[] = {
+	{ .compatible = "amd,xgbe-seattle-v0a", },
 	{ .compatible = "amd,xgbe-seattle-v1a", },
 	{},
 };
+#endif
 
 MODULE_DEVICE_TABLE(of, xgbe_of_match);
 static SIMPLE_DEV_PM_OPS(xgbe_pm_ops, xgbe_suspend, xgbe_resume);
@@ -502,7 +673,12 @@ static SIMPLE_DEV_PM_OPS(xgbe_pm_ops, xgbe_suspend, xgbe_resume);
 static struct platform_driver xgbe_driver = {
 	.driver = {
 		.name = "amd-xgbe",
+#ifdef CONFIG_ACPI
+		.acpi_match_table = xgbe_acpi_match,
+#endif
+#ifdef CONFIG_OF
 		.of_match_table = xgbe_of_match,
+#endif
 		.pm = &xgbe_pm_ops,
 	},
 	.probe = xgbe_probe,
diff --git a/drivers/net/ethernet/amd/xgbe/xgbe-mdio.c b/drivers/net/ethernet/amd/xgbe/xgbe-mdio.c
index 363b210..5d2c89b 100644
--- a/drivers/net/ethernet/amd/xgbe/xgbe-mdio.c
+++ b/drivers/net/ethernet/amd/xgbe/xgbe-mdio.c
@@ -119,6 +119,7 @@
 #include <linux/mdio.h>
 #include <linux/phy.h>
 #include <linux/of.h>
+#include <linux/acpi.h>
 
 #include "xgbe.h"
 #include "xgbe-common.h"
@@ -205,25 +206,16 @@ void xgbe_dump_phy_registers(struct xgbe_prv_data *pdata)
 
 int xgbe_mdio_register(struct xgbe_prv_data *pdata)
 {
-	struct device_node *phy_node;
 	struct mii_bus *mii;
 	struct phy_device *phydev;
 	int ret = 0;
 
 	DBGPR("-->xgbe_mdio_register\n");
 
-	/* Retrieve the phy-handle */
-	phy_node = of_parse_phandle(pdata->dev->of_node, "phy-handle", 0);
-	if (!phy_node) {
-		dev_err(pdata->dev, "unable to parse phy-handle\n");
-		return -EINVAL;
-	}
-
 	mii = mdiobus_alloc();
 	if (mii == NULL) {
 		dev_err(pdata->dev, "mdiobus_alloc failed\n");
-		ret = -ENOMEM;
-		goto err_node_get;
+		return -ENOMEM;
 	}
 
 	/* Register on the MDIO bus (don't probe any PHYs) */
@@ -252,12 +244,9 @@ int xgbe_mdio_register(struct xgbe_prv_data *pdata)
 	request_module(MDIO_MODULE_PREFIX MDIO_ID_FMT,
 		       MDIO_ID_ARGS(phydev->c45_ids.device_ids[MDIO_MMD_PCS]));
 
-	of_node_get(phy_node);
-	phydev->dev.of_node = phy_node;
 	ret = phy_device_register(phydev);
 	if (ret) {
 		dev_err(pdata->dev, "phy_device_register failed\n");
-		of_node_put(phy_node);
 		goto err_phy_device;
 	}
 
@@ -283,8 +272,6 @@ int xgbe_mdio_register(struct xgbe_prv_data *pdata)
 
 	pdata->phydev = phydev;
 
-	of_node_put(phy_node);
-
 	DBGPHY_REGS(pdata);
 
 	DBGPR("<--xgbe_mdio_register\n");
@@ -300,9 +287,6 @@ err_mdiobus_register:
 err_mdiobus_alloc:
 	mdiobus_free(mii);
 
-err_node_get:
-	of_node_put(phy_node);
-
 	return ret;
 }
 
diff --git a/drivers/net/ethernet/amd/xgbe/xgbe-ptp.c b/drivers/net/ethernet/amd/xgbe/xgbe-ptp.c
index a1bf9d1c..fa67203 100644
--- a/drivers/net/ethernet/amd/xgbe/xgbe-ptp.c
+++ b/drivers/net/ethernet/amd/xgbe/xgbe-ptp.c
@@ -239,7 +239,7 @@ void xgbe_ptp_register(struct xgbe_prv_data *pdata)
 	snprintf(info->name, sizeof(info->name), "%s",
 		 netdev_name(pdata->netdev));
 	info->owner = THIS_MODULE;
-	info->max_adj = clk_get_rate(pdata->ptpclk);
+	info->max_adj = pdata->ptpclk_rate;
 	info->adjfreq = xgbe_adjfreq;
 	info->adjtime = xgbe_adjtime;
 	info->gettime = xgbe_gettime;
@@ -260,7 +260,7 @@ void xgbe_ptp_register(struct xgbe_prv_data *pdata)
 	 */
 	dividend = 50000000;
 	dividend <<= 32;
-	pdata->tstamp_addend = div_u64(dividend, clk_get_rate(pdata->ptpclk));
+	pdata->tstamp_addend = div_u64(dividend, pdata->ptpclk_rate);
 
 	/* Setup the timecounter */
 	cc->read = xgbe_cc_read;
diff --git a/drivers/net/ethernet/amd/xgbe/xgbe.h b/drivers/net/ethernet/amd/xgbe/xgbe.h
index f9ec762..6f3a39e 100644
--- a/drivers/net/ethernet/amd/xgbe/xgbe.h
+++ b/drivers/net/ethernet/amd/xgbe/xgbe.h
@@ -187,6 +187,12 @@
 #define XGBE_PTP_CLOCK		"ptp_clk"
 #define XGBE_DMA_IRQS		"amd,per-channel-interrupt"
 
+/* ACPI property names */
+#define XGBE_ACPI_MAC_ADDR	"mac-address"
+#define XGBE_ACPI_PHY_MODE	"phy-mode"
+#define XGBE_ACPI_DMA_FREQ	"amd,dma-freq"
+#define XGBE_ACPI_PTP_FREQ	"amd,ptp-freq"
+
 /* Timestamp support - values based on 50MHz PTP clock
  *   50MHz => 20 nsec
  */
@@ -201,8 +207,11 @@
 #define XGBE_FIFO_SIZE_B(x)	(x)
 #define XGBE_FIFO_SIZE_KB(x)	(x * 1024)
 
+#define XGBE_TC_CNT		2
 #define XGBE_TC_MIN_QUANTUM	10
 
+#define XGBE_SEATTLE_A0		((read_cpuid_id() & 0x00f0000f) == 0)
+
 /* Helper macro for descriptor handling
  *  Always use XGBE_GET_DESC_DATA to access the descriptor data
  *  since the index is free-running and needs to be and-ed
@@ -650,6 +659,7 @@ struct xgbe_hw_features {
 struct xgbe_prv_data {
 	struct net_device *netdev;
 	struct platform_device *pdev;
+	struct acpi_device *adev;
 	struct device *dev;
 
 	/* XGMAC/XPCS related mmio registers */
@@ -739,6 +749,7 @@ struct xgbe_prv_data {
 	unsigned int phy_rx_pause;
 
 	/* Netdev related settings */
+	unsigned char mac_addr[MAX_ADDR_LEN];
 	netdev_features_t netdev_features;
 	struct napi_struct napi;
 	struct xgbe_mmc_stats mmc_stats;
@@ -748,7 +759,9 @@ struct xgbe_prv_data {
 
 	/* Device clocks */
 	struct clk *sysclk;
+	unsigned long sysclk_rate;
 	struct clk *ptpclk;
+	unsigned long ptpclk_rate;
 
 	/* Timestamp support */
 	spinlock_t tstamp_lock;
diff --git a/drivers/net/ethernet/apm/xgene/xgene_enet_hw.c b/drivers/net/ethernet/apm/xgene/xgene_enet_hw.c
index 7ba83ff..29aad5e 100644
--- a/drivers/net/ethernet/apm/xgene/xgene_enet_hw.c
+++ b/drivers/net/ethernet/apm/xgene/xgene_enet_hw.c
@@ -663,15 +663,20 @@ static int xgene_enet_phy_connect(struct net_device *ndev)
 	struct phy_device *phy_dev;
 	struct device *dev = &pdata->pdev->dev;
 
-	phy_np = of_parse_phandle(dev->of_node, "phy-handle", 0);
-	if (!phy_np) {
-		netdev_dbg(ndev, "No phy-handle found\n");
-		return -ENODEV;
+	if (dev->of_node) {
+		phy_np = of_parse_phandle(dev->of_node, "phy-handle", 0);
+		if (!phy_np) {
+			netdev_dbg(ndev, "No phy-handle found in DT\n");
+			return -ENODEV;
+		}
+		pdata->phy_dev = of_phy_find_device(phy_np);
 	}
 
-	phy_dev = of_phy_connect(ndev, phy_np, &xgene_enet_adjust_link,
-				 0, pdata->phy_mode);
-	if (!phy_dev) {
+	phy_dev = pdata->phy_dev;
+
+	if (phy_dev == NULL ||
+	    phy_connect_direct(ndev, phy_dev, &xgene_enet_adjust_link,
+			       pdata->phy_mode)) {
 		netdev_err(ndev, "Could not connect to PHY\n");
 		return  -ENODEV;
 	}
@@ -681,11 +686,52 @@ static int xgene_enet_phy_connect(struct net_device *ndev)
 			      ~SUPPORTED_100baseT_Half &
 			      ~SUPPORTED_1000baseT_Half;
 	phy_dev->advertising = phy_dev->supported;
-	pdata->phy_dev = phy_dev;
 
 	return 0;
 }
 
+#ifdef CONFIG_ACPI
+static int xgene_acpi_mdiobus_register(struct xgene_enet_pdata *pdata,
+	struct mii_bus *mdio)
+{
+	struct device *dev = &pdata->pdev->dev;
+	struct phy_device *phy;
+	int i, ret;
+	u32 phy_id;
+
+	/* Mask out all PHYs from auto probing. */
+	mdio->phy_mask = ~0;
+
+	/* Clear all the IRQ properties */
+	if (mdio->irq)
+		for (i = 0; i < PHY_MAX_ADDR; i++)
+			mdio->irq[i] = PHY_POLL;
+
+	/* Register the MDIO bus */
+	ret = mdiobus_register(mdio);
+	if (ret)
+		return ret;
+
+	ret = device_property_read_u32(dev, "phy-channel", &phy_id);
+	if (ret)
+		return -EINVAL;
+
+	phy = get_phy_device(mdio, phy_id, true);
+	if (!phy || IS_ERR(phy))
+		return -EIO;
+
+	ret = phy_device_register(phy);
+	if (ret)
+		phy_device_free(phy);
+	else
+		pdata->phy_dev = phy;
+
+	return ret;
+}
+#else
+#define xgene_acpi_mdiobus_register(a, b) -1
+#endif
+
 int xgene_enet_mdio_config(struct xgene_enet_pdata *pdata)
 {
 	struct net_device *ndev = pdata->ndev;
@@ -702,7 +748,7 @@ int xgene_enet_mdio_config(struct xgene_enet_pdata *pdata)
 		}
 	}
 
-	if (!mdio_np) {
+	if (dev->of_node && !mdio_np) {
 		netdev_dbg(ndev, "No mdio node in the dts\n");
 		return -ENXIO;
 	}
@@ -720,7 +766,10 @@ int xgene_enet_mdio_config(struct xgene_enet_pdata *pdata)
 	mdio_bus->priv = pdata;
 	mdio_bus->parent = &ndev->dev;
 
-	ret = of_mdiobus_register(mdio_bus, mdio_np);
+	if (dev->of_node)
+		ret = of_mdiobus_register(mdio_bus, mdio_np);
+	else
+		ret = xgene_acpi_mdiobus_register(pdata, mdio_bus);
 	if (ret) {
 		netdev_err(ndev, "Failed to register MDIO bus\n");
 		mdiobus_free(mdio_bus);
diff --git a/drivers/net/ethernet/apm/xgene/xgene_enet_main.c b/drivers/net/ethernet/apm/xgene/xgene_enet_main.c
index 83a5028..f66598a 100644
--- a/drivers/net/ethernet/apm/xgene/xgene_enet_main.c
+++ b/drivers/net/ethernet/apm/xgene/xgene_enet_main.c
@@ -746,6 +746,42 @@ static const struct net_device_ops xgene_ndev_ops = {
 	.ndo_set_mac_address = xgene_enet_set_mac_address,
 };
 
+#ifdef CONFIG_ACPI
+static int acpi_get_mac_address(struct device *dev,
+				unsigned char *addr)
+{
+	int ret;
+
+	ret = device_property_read_u8_array(dev, "mac-address", addr, 6);
+	if (ret)
+		return 0;
+
+	return 6;
+}
+
+static int acpi_get_phy_mode(struct device *dev)
+{
+	int i, ret, phy_mode;
+	char *modestr;
+
+	ret = device_property_read_string(dev, "phy-mode", &modestr);
+	if (ret)
+		return -1;
+
+	phy_mode = -1;
+	for (i = 0; i < PHY_INTERFACE_MODE_MAX; i++) {
+		if (!strcasecmp(modestr, phy_modes(i))) {
+			phy_mode = i;
+			break;
+		}
+	}
+	return phy_mode;
+}
+#else
+#define acpi_get_mac_address(a, b, c) 0
+#define acpi_get_phy_mode(a) -1
+#endif
+
 static int xgene_enet_get_resources(struct xgene_enet_pdata *pdata)
 {
 	struct platform_device *pdev;
@@ -761,6 +797,12 @@ static int xgene_enet_get_resources(struct xgene_enet_pdata *pdata)
 	ndev = pdata->ndev;
 
 	res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "enet_csr");
+	if (!res)
+		res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	if (!res) {
+		dev_err(dev, "Resource enet_csr not defined\n");
+		return -ENODEV;
+	}
 	pdata->base_addr = devm_ioremap_resource(dev, res);
 	if (IS_ERR(pdata->base_addr)) {
 		dev_err(dev, "Unable to retrieve ENET Port CSR region\n");
@@ -768,6 +810,12 @@ static int xgene_enet_get_resources(struct xgene_enet_pdata *pdata)
 	}
 
 	res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "ring_csr");
+	if (!res)
+		res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
+	if (!res) {
+		dev_err(dev, "Resource ring_csr not defined\n");
+		return -ENODEV;
+	}
 	pdata->ring_csr_addr = devm_ioremap_resource(dev, res);
 	if (IS_ERR(pdata->ring_csr_addr)) {
 		dev_err(dev, "Unable to retrieve ENET Ring CSR region\n");
@@ -775,6 +823,12 @@ static int xgene_enet_get_resources(struct xgene_enet_pdata *pdata)
 	}
 
 	res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "ring_cmd");
+	if (!res)
+		res = platform_get_resource(pdev, IORESOURCE_MEM, 2);
+	if (!res) {
+		dev_err(dev, "Resource ring_cmd not defined\n");
+		return -ENODEV;
+	}
 	pdata->ring_cmd_addr = devm_ioremap_resource(dev, res);
 	if (IS_ERR(pdata->ring_cmd_addr)) {
 		dev_err(dev, "Unable to retrieve ENET Ring command region\n");
@@ -792,11 +846,13 @@ static int xgene_enet_get_resources(struct xgene_enet_pdata *pdata)
 	mac = of_get_mac_address(dev->of_node);
 	if (mac)
 		memcpy(ndev->dev_addr, mac, ndev->addr_len);
-	else
+	else if (!acpi_get_mac_address(dev, ndev->dev_addr))
 		eth_hw_addr_random(ndev);
 	memcpy(ndev->perm_addr, ndev->dev_addr, ndev->addr_len);
 
 	pdata->phy_mode = of_get_phy_mode(pdev->dev.of_node);
+	if (pdata->phy_mode < 0)
+		pdata->phy_mode = acpi_get_phy_mode(dev);
 	if (pdata->phy_mode < 0) {
 		dev_err(dev, "Unable to get phy-connection-type\n");
 		return pdata->phy_mode;
@@ -809,11 +865,12 @@ static int xgene_enet_get_resources(struct xgene_enet_pdata *pdata)
 	}
 
 	pdata->clk = devm_clk_get(&pdev->dev, NULL);
-	ret = IS_ERR(pdata->clk);
 	if (IS_ERR(pdata->clk)) {
-		dev_err(&pdev->dev, "can't get clock\n");
-		ret = PTR_ERR(pdata->clk);
-		return ret;
+		/*
+		 * Not necessarily an error. Firmware may have
+		 * set up the clock already.
+		 */
+		pdata->clk = NULL;
 	}
 
 	base_addr = pdata->base_addr;
@@ -863,7 +920,7 @@ static int xgene_enet_init_hw(struct xgene_enet_pdata *pdata)
 	pdata->port_ops->cle_bypass(pdata, dst_ring_num, buf_pool->id);
 	pdata->mac_ops->init(pdata);
 
-	return ret;
+	return 0;
 }
 
 static void xgene_enet_setup_ops(struct xgene_enet_pdata *pdata)
@@ -924,7 +981,7 @@ static int xgene_enet_probe(struct platform_device *pdev)
 		goto err;
 	}
 
-	ret = dma_set_mask_and_coherent(dev, DMA_BIT_MASK(64));
+	ret = dma_coerce_mask_and_coherent(dev, DMA_BIT_MASK(64));
 	if (ret) {
 		netdev_err(ndev, "No usable DMA configuration\n");
 		goto err;
@@ -972,6 +1029,14 @@ static int xgene_enet_remove(struct platform_device *pdev)
 	return 0;
 }
 
+#ifdef CONFIG_ACPI
+static const struct acpi_device_id xgene_enet_acpi_match[] = {
+	{ "APMC0D05", },
+	{ }
+};
+MODULE_DEVICE_TABLE(acpi, xgene_enet_acpi_match);
+#endif
+
 static struct of_device_id xgene_enet_match[] = {
 	{.compatible = "apm,xgene-enet",},
 	{},
@@ -983,6 +1048,7 @@ static struct platform_driver xgene_enet_driver = {
 	.driver = {
 		   .name = "xgene-enet",
 		   .of_match_table = xgene_enet_match,
+		   .acpi_match_table = ACPI_PTR(xgene_enet_acpi_match),
 	},
 	.probe = xgene_enet_probe,
 	.remove = xgene_enet_remove,
diff --git a/drivers/net/ethernet/apm/xgene/xgene_enet_main.h b/drivers/net/ethernet/apm/xgene/xgene_enet_main.h
index f9958fa..0e06cad 100644
--- a/drivers/net/ethernet/apm/xgene/xgene_enet_main.h
+++ b/drivers/net/ethernet/apm/xgene/xgene_enet_main.h
@@ -31,6 +31,7 @@
 #include <linux/prefetch.h>
 #include <linux/if_vlan.h>
 #include <linux/phy.h>
+#include <linux/acpi.h>
 #include "xgene_enet_hw.h"
 
 #define XGENE_DRV_VERSION	"v1.0"
diff --git a/drivers/net/ethernet/smsc/smc91x.c b/drivers/net/ethernet/smsc/smc91x.c
index 88a55f9..944b177 100644
--- a/drivers/net/ethernet/smsc/smc91x.c
+++ b/drivers/net/ethernet/smsc/smc91x.c
@@ -82,6 +82,7 @@ static const char version[] =
 #include <linux/of.h>
 #include <linux/of_device.h>
 #include <linux/of_gpio.h>
+#include <linux/acpi.h>
 
 #include <linux/netdevice.h>
 #include <linux/etherdevice.h>
@@ -2467,6 +2468,14 @@ static struct dev_pm_ops smc_drv_pm_ops = {
 	.resume		= smc_drv_resume,
 };
 
+#ifdef CONFIG_ACPI
+static const struct acpi_device_id smc91x_acpi_match[] = {
+	{ "LNRO0003", },
+	{ }
+};
+MODULE_DEVICE_TABLE(acpi, smc91x_acpi_match);
+#endif
+
 static struct platform_driver smc_driver = {
 	.probe		= smc_drv_probe,
 	.remove		= smc_drv_remove,
@@ -2474,6 +2483,7 @@ static struct platform_driver smc_driver = {
 		.name	= CARDNAME,
 		.pm	= &smc_drv_pm_ops,
 		.of_match_table = of_match_ptr(smc91x_match),
+		.acpi_match_table = ACPI_PTR(smc91x_acpi_match),
 	},
 };
 
diff --git a/drivers/net/phy/amd-xgbe-phy.c b/drivers/net/phy/amd-xgbe-phy.c
index 903dc3d..fcc4fc7 100644
--- a/drivers/net/phy/amd-xgbe-phy.c
+++ b/drivers/net/phy/amd-xgbe-phy.c
@@ -74,15 +74,19 @@
 #include <linux/of_platform.h>
 #include <linux/of_device.h>
 #include <linux/uaccess.h>
+#include <linux/acpi.h>
+
 
 MODULE_AUTHOR("Tom Lendacky <thomas.lendacky@amd.com>");
 MODULE_LICENSE("Dual BSD/GPL");
-MODULE_VERSION("1.0.0-a");
+MODULE_VERSION("0.0.0-a");
 MODULE_DESCRIPTION("AMD 10GbE (amd-xgbe) PHY driver");
 
-#define XGBE_PHY_ID	0x000162d0
+#define XGBE_PHY_ID	0x7996ced0
 #define XGBE_PHY_MASK	0xfffffff0
 
+#define XGBE_PHY_SERDES_RETRY		32
+#define XGBE_PHY_CHANNEL_PROPERTY	"amd,serdes-channel"
 #define XGBE_PHY_SPEEDSET_PROPERTY	"amd,speed-set"
 
 #define XGBE_AN_INT_CMPLT		0x01
@@ -99,11 +103,9 @@ MODULE_DESCRIPTION("AMD 10GbE (amd-xgbe) PHY driver");
 #ifndef MDIO_PMA_10GBR_PMD_CTRL
 #define MDIO_PMA_10GBR_PMD_CTRL		0x0096
 #endif
-
 #ifndef MDIO_PMA_10GBR_FEC_CTRL
 #define MDIO_PMA_10GBR_FEC_CTRL		0x00ab
 #endif
-
 #ifndef MDIO_AN_XNP
 #define MDIO_AN_XNP			0x0016
 #endif
@@ -111,93 +113,14 @@ MODULE_DESCRIPTION("AMD 10GbE (amd-xgbe) PHY driver");
 #ifndef MDIO_AN_INTMASK
 #define MDIO_AN_INTMASK			0x8001
 #endif
-
 #ifndef MDIO_AN_INT
 #define MDIO_AN_INT			0x8002
 #endif
 
-#ifndef MDIO_AN_KR_CTRL
-#define MDIO_AN_KR_CTRL			0x8003
-#endif
-
 #ifndef MDIO_CTRL1_SPEED1G
 #define MDIO_CTRL1_SPEED1G		(MDIO_CTRL1_SPEED10G & ~BMCR_SPEED100)
 #endif
 
-#ifndef MDIO_KR_CTRL_PDETECT
-#define MDIO_KR_CTRL_PDETECT		0x01
-#endif
-
-/* SerDes integration register offsets */
-#define SIR0_KR_RT_1			0x002c
-#define SIR0_STATUS			0x0040
-#define SIR1_SPEED			0x0000
-
-/* SerDes integration register entry bit positions and sizes */
-#define SIR0_KR_RT_1_RESET_INDEX	11
-#define SIR0_KR_RT_1_RESET_WIDTH	1
-#define SIR0_STATUS_RX_READY_INDEX	0
-#define SIR0_STATUS_RX_READY_WIDTH	1
-#define SIR0_STATUS_TX_READY_INDEX	8
-#define SIR0_STATUS_TX_READY_WIDTH	1
-#define SIR1_SPEED_DATARATE_INDEX	4
-#define SIR1_SPEED_DATARATE_WIDTH	2
-#define SIR1_SPEED_PI_SPD_SEL_INDEX	12
-#define SIR1_SPEED_PI_SPD_SEL_WIDTH	4
-#define SIR1_SPEED_PLLSEL_INDEX		3
-#define SIR1_SPEED_PLLSEL_WIDTH		1
-#define SIR1_SPEED_RATECHANGE_INDEX	6
-#define SIR1_SPEED_RATECHANGE_WIDTH	1
-#define SIR1_SPEED_TXAMP_INDEX		8
-#define SIR1_SPEED_TXAMP_WIDTH		4
-#define SIR1_SPEED_WORDMODE_INDEX	0
-#define SIR1_SPEED_WORDMODE_WIDTH	3
-
-#define SPEED_10000_CDR			0x7
-#define SPEED_10000_PLL			0x1
-#define SPEED_10000_RATE		0x0
-#define SPEED_10000_TXAMP		0xa
-#define SPEED_10000_WORD		0x7
-
-#define SPEED_2500_CDR			0x2
-#define SPEED_2500_PLL			0x0
-#define SPEED_2500_RATE			0x1
-#define SPEED_2500_TXAMP		0xf
-#define SPEED_2500_WORD			0x1
-
-#define SPEED_1000_CDR			0x2
-#define SPEED_1000_PLL			0x0
-#define SPEED_1000_RATE			0x3
-#define SPEED_1000_TXAMP		0xf
-#define SPEED_1000_WORD			0x1
-
-/* SerDes RxTx register offsets */
-#define RXTX_REG20			0x0050
-#define RXTX_REG114			0x01c8
-
-/* SerDes RxTx register entry bit positions and sizes */
-#define RXTX_REG20_BLWC_ENA_INDEX	2
-#define RXTX_REG20_BLWC_ENA_WIDTH	1
-#define RXTX_REG114_PQ_REG_INDEX	9
-#define RXTX_REG114_PQ_REG_WIDTH	7
-
-#define RXTX_10000_BLWC			0
-#define RXTX_10000_PQ			0x1e
-
-#define RXTX_2500_BLWC			1
-#define RXTX_2500_PQ			0xa
-
-#define RXTX_1000_BLWC			1
-#define RXTX_1000_PQ			0xa
-
-/* Bit setting and getting macros
- *  The get macro will extract the current bit field value from within
- *  the variable
- *
- *  The set macro will clear the current bit field value within the
- *  variable and then set the bit field of the variable to the
- *  specified value
- */
 #define GET_BITS(_var, _index, _width)					\
 	(((_var) >> (_index)) & ((0x1 << (_width)) - 1))
 
@@ -207,70 +130,12 @@ do {									\
 	(_var) |= (((_val) & ((0x1 << (_width)) - 1)) << (_index));	\
 } while (0)
 
-#define XSIR_GET_BITS(_var, _prefix, _field)				\
-	GET_BITS((_var),						\
-		 _prefix##_##_field##_INDEX,				\
-		 _prefix##_##_field##_WIDTH)
-
-#define XSIR_SET_BITS(_var, _prefix, _field, _val)			\
-	SET_BITS((_var),						\
-		 _prefix##_##_field##_INDEX,				\
-		 _prefix##_##_field##_WIDTH, (_val))
-
-/* Macros for reading or writing SerDes integration registers
- *  The ioread macros will get bit fields or full values using the
- *  register definitions formed using the input names
- *
- *  The iowrite macros will set bit fields or full values using the
- *  register definitions formed using the input names
- */
-#define XSIR0_IOREAD(_priv, _reg)					\
-	ioread16((_priv)->sir0_regs + _reg)
-
-#define XSIR0_IOREAD_BITS(_priv, _reg, _field)				\
-	GET_BITS(XSIR0_IOREAD((_priv), _reg),				\
-		 _reg##_##_field##_INDEX,				\
-		 _reg##_##_field##_WIDTH)
-
-#define XSIR0_IOWRITE(_priv, _reg, _val)				\
-	iowrite16((_val), (_priv)->sir0_regs + _reg)
-
-#define XSIR0_IOWRITE_BITS(_priv, _reg, _field, _val)			\
-do {									\
-	u16 reg_val = XSIR0_IOREAD((_priv), _reg);			\
-	SET_BITS(reg_val,						\
-		 _reg##_##_field##_INDEX,				\
-		 _reg##_##_field##_WIDTH, (_val));			\
-	XSIR0_IOWRITE((_priv), _reg, reg_val);				\
-} while (0)
-
-#define XSIR1_IOREAD(_priv, _reg)					\
-	ioread16((_priv)->sir1_regs + _reg)
-
-#define XSIR1_IOREAD_BITS(_priv, _reg, _field)				\
-	GET_BITS(XSIR1_IOREAD((_priv), _reg),				\
-		 _reg##_##_field##_INDEX,				\
-		 _reg##_##_field##_WIDTH)
+#define XCMU_IOREAD(_priv, _reg)					\
+	ioread16((_priv)->cmu_regs + _reg)
 
-#define XSIR1_IOWRITE(_priv, _reg, _val)				\
-	iowrite16((_val), (_priv)->sir1_regs + _reg)
+#define XCMU_IOWRITE(_priv, _reg, _val)					\
+	iowrite16((_val), (_priv)->cmu_regs + _reg)
 
-#define XSIR1_IOWRITE_BITS(_priv, _reg, _field, _val)			\
-do {									\
-	u16 reg_val = XSIR1_IOREAD((_priv), _reg);			\
-	SET_BITS(reg_val,						\
-		 _reg##_##_field##_INDEX,				\
-		 _reg##_##_field##_WIDTH, (_val));			\
-	XSIR1_IOWRITE((_priv), _reg, reg_val);				\
-} while (0)
-
-/* Macros for reading or writing SerDes RxTx registers
- *  The ioread macros will get bit fields or full values using the
- *  register definitions formed using the input names
- *
- *  The iowrite macros will set bit fields or full values using the
- *  register definitions formed using the input names
- */
 #define XRXTX_IOREAD(_priv, _reg)					\
 	ioread16((_priv)->rxtx_regs + _reg)
 
@@ -291,6 +156,78 @@ do {									\
 	XRXTX_IOWRITE((_priv), _reg, reg_val);				\
 } while (0)
 
+/* SerDes CMU register offsets */
+#define CMU_REG15			0x003c
+#define CMU_REG16			0x0040
+
+/* SerDes CMU register entry bit positions and sizes */
+#define CMU_REG16_TX_RATE_CHANGE_BASE	15
+#define CMU_REG16_RX_RATE_CHANGE_BASE	14
+#define CMU_REG16_RATE_CHANGE_DECR	2
+
+
+/* SerDes RxTx register offsets */
+#define RXTX_REG2			0x0008
+#define RXTX_REG3			0x000c
+#define RXTX_REG5			0x0014
+#define RXTX_REG6			0x0018
+#define RXTX_REG20			0x0050
+#define RXTX_REG53			0x00d4
+#define RXTX_REG114			0x01c8
+#define RXTX_REG115			0x01cc
+#define RXTX_REG142			0x0238
+
+/* SerDes RxTx register entry bit positions and sizes */
+#define RXTX_REG2_RESETB_INDEX			15
+#define RXTX_REG2_RESETB_WIDTH			1
+#define RXTX_REG3_TX_DATA_RATE_INDEX		14
+#define RXTX_REG3_TX_DATA_RATE_WIDTH		2
+#define RXTX_REG3_TX_WORD_MODE_INDEX		11
+#define RXTX_REG3_TX_WORD_MODE_WIDTH		3
+#define RXTX_REG5_TXAMP_CNTL_INDEX		7
+#define RXTX_REG5_TXAMP_CNTL_WIDTH		4
+#define RXTX_REG6_RX_DATA_RATE_INDEX		9
+#define RXTX_REG6_RX_DATA_RATE_WIDTH		2
+#define RXTX_REG6_RX_WORD_MODE_INDEX		11
+#define RXTX_REG6_RX_WORD_MODE_WIDTH		3
+#define RXTX_REG20_BLWC_ENA_INDEX		2
+#define RXTX_REG20_BLWC_ENA_WIDTH		1
+#define RXTX_REG53_RX_PLLSELECT_INDEX		15
+#define RXTX_REG53_RX_PLLSELECT_WIDTH		1
+#define RXTX_REG53_TX_PLLSELECT_INDEX		14
+#define RXTX_REG53_TX_PLLSELECT_WIDTH		1
+#define RXTX_REG53_PI_SPD_SEL_CDR_INDEX		10
+#define RXTX_REG53_PI_SPD_SEL_CDR_WIDTH		4
+#define RXTX_REG114_PQ_REG_INDEX		9
+#define RXTX_REG114_PQ_REG_WIDTH		7
+#define RXTX_REG115_FORCE_LAT_CAL_START_INDEX	2
+#define RXTX_REG115_FORCE_LAT_CAL_START_WIDTH	1
+#define RXTX_REG115_FORCE_SUM_CAL_START_INDEX	1
+#define RXTX_REG115_FORCE_SUM_CAL_START_WIDTH	1
+#define RXTX_REG142_SUM_CALIB_DONE_INDEX	15
+#define RXTX_REG142_SUM_CALIB_DONE_WIDTH	1
+#define RXTX_REG142_SUM_CALIB_ERR_INDEX		14
+#define RXTX_REG142_SUM_CALIB_ERR_WIDTH		1
+#define RXTX_REG142_LAT_CALIB_DONE_INDEX	11
+#define RXTX_REG142_LAT_CALIB_DONE_WIDTH	1
+
+#define RXTX_FULL_RATE				0x0
+#define RXTX_HALF_RATE				0x1
+#define RXTX_FIFTH_RATE				0x3
+#define RXTX_66BIT_WORD				0x7
+#define RXTX_10BIT_WORD				0x1
+#define RXTX_10G_TX_AMP				0xa
+#define RXTX_1G_TX_AMP				0xf
+#define RXTX_10G_CDR				0x7
+#define RXTX_1G_CDR				0x2
+#define RXTX_10G_PLL				0x1
+#define RXTX_1G_PLL				0x0
+#define RXTX_10G_PQ				0x1e
+#define RXTX_1G_PQ				0xa
+
+
+DEFINE_SPINLOCK(cmu_lock);
+
 enum amd_xgbe_phy_an {
 	AMD_XGBE_AN_READY = 0,
 	AMD_XGBE_AN_START,
@@ -316,29 +253,31 @@ enum amd_xgbe_phy_mode {
 };
 
 enum amd_xgbe_phy_speedset {
-	AMD_XGBE_PHY_SPEEDSET_1000_10000,
+	AMD_XGBE_PHY_SPEEDSET_1000_10000 = 0,
 	AMD_XGBE_PHY_SPEEDSET_2500_10000,
 };
 
 struct amd_xgbe_phy_priv {
 	struct platform_device *pdev;
+	struct acpi_device *adev;
 	struct device *dev;
 
 	struct phy_device *phydev;
 
 	/* SerDes related mmio resources */
 	struct resource *rxtx_res;
-	struct resource *sir0_res;
-	struct resource *sir1_res;
+	struct resource *cmu_res;
 
 	/* SerDes related mmio registers */
 	void __iomem *rxtx_regs;	/* SerDes Rx/Tx CSRs */
-	void __iomem *sir0_regs;	/* SerDes integration registers (1/2) */
-	void __iomem *sir1_regs;	/* SerDes integration registers (2/2) */
+	void __iomem *cmu_regs;		/* SerDes CMU CSRs */
+
+	unsigned int serdes_channel;
+	unsigned int speed_set;
 
 	/* Maintain link status for re-starting auto-negotiation */
 	unsigned int link;
-	unsigned int speed_set;
+	enum amd_xgbe_phy_mode mode;
 
 	/* Auto-negotiation state machine support */
 	struct mutex an_mutex;
@@ -348,7 +287,6 @@ struct amd_xgbe_phy_priv {
 	enum amd_xgbe_phy_rx kx_state;
 	struct work_struct an_work;
 	struct workqueue_struct *an_workqueue;
-	unsigned int parallel_detect;
 };
 
 static int amd_xgbe_an_enable_kr_training(struct phy_device *phydev)
@@ -401,33 +339,51 @@ static int amd_xgbe_phy_pcs_power_cycle(struct phy_device *phydev)
 static void amd_xgbe_phy_serdes_start_ratechange(struct phy_device *phydev)
 {
 	struct amd_xgbe_phy_priv *priv = phydev->priv;
+	u16 val, mask;
+
+	/* Assert Rx and Tx ratechange in CMU_reg16 */
+	val = XCMU_IOREAD(priv, CMU_REG16);
 
-	/* Assert Rx and Tx ratechange */
-	XSIR1_IOWRITE_BITS(priv, SIR1_SPEED, RATECHANGE, 1);
+	mask = (1 << (CMU_REG16_TX_RATE_CHANGE_BASE -
+		      (priv->serdes_channel * CMU_REG16_RATE_CHANGE_DECR))) |
+	       (1 << (CMU_REG16_RX_RATE_CHANGE_BASE -
+		      (priv->serdes_channel * CMU_REG16_RATE_CHANGE_DECR)));
+	val |= mask;
+
+	XCMU_IOWRITE(priv, CMU_REG16, val);
 }
 
 static void amd_xgbe_phy_serdes_complete_ratechange(struct phy_device *phydev)
 {
 	struct amd_xgbe_phy_priv *priv = phydev->priv;
+	u16 val, mask;
 	unsigned int wait;
-	u16 status;
 
-	/* Release Rx and Tx ratechange */
-	XSIR1_IOWRITE_BITS(priv, SIR1_SPEED, RATECHANGE, 0);
+	/* Release Rx and Tx ratechange for proper channel in CMU_reg16 */
+	val = XCMU_IOREAD(priv, CMU_REG16);
+
+	mask = (1 << (CMU_REG16_TX_RATE_CHANGE_BASE -
+		      (priv->serdes_channel * CMU_REG16_RATE_CHANGE_DECR))) |
+	       (1 << (CMU_REG16_RX_RATE_CHANGE_BASE -
+		      (priv->serdes_channel * CMU_REG16_RATE_CHANGE_DECR)));
+	val &= ~mask;
 
-	/* Wait for Rx and Tx ready */
+	XCMU_IOWRITE(priv, CMU_REG16, val);
+
+	/* Wait for Rx and Tx ready in CMU_reg15 */
+	mask = (1 << priv->serdes_channel) |
+	       (1 << (priv->serdes_channel + 8));
 	wait = XGBE_PHY_RATECHANGE_COUNT;
 	while (wait--) {
-		usleep_range(50, 75);
+		udelay(50);
 
-		status = XSIR0_IOREAD(priv, SIR0_STATUS);
-		if (XSIR_GET_BITS(status, SIR0_STATUS, RX_READY) &&
-		    XSIR_GET_BITS(status, SIR0_STATUS, TX_READY))
+		val = XCMU_IOREAD(priv, CMU_REG15);
+		if ((val & mask) == mask)
 			return;
 	}
 
 	netdev_dbg(phydev->attached_dev, "SerDes rx/tx not ready (%#hx)\n",
-		   status);
+		   val);
 }
 
 static int amd_xgbe_phy_xgmii_mode(struct phy_device *phydev)
@@ -435,8 +391,8 @@ static int amd_xgbe_phy_xgmii_mode(struct phy_device *phydev)
 	struct amd_xgbe_phy_priv *priv = phydev->priv;
 	int ret;
 
-	/* Enable KR training */
-	ret = amd_xgbe_an_enable_kr_training(phydev);
+	/* Disable KR training */
+	ret = amd_xgbe_an_disable_kr_training(phydev);
 	if (ret < 0)
 		return ret;
 
@@ -462,19 +418,32 @@ static int amd_xgbe_phy_xgmii_mode(struct phy_device *phydev)
 		return ret;
 
 	/* Set SerDes to 10G speed */
+	spin_lock(&cmu_lock);
+
 	amd_xgbe_phy_serdes_start_ratechange(phydev);
 
-	XSIR1_IOWRITE_BITS(priv, SIR1_SPEED, DATARATE, SPEED_10000_RATE);
-	XSIR1_IOWRITE_BITS(priv, SIR1_SPEED, WORDMODE, SPEED_10000_WORD);
-	XSIR1_IOWRITE_BITS(priv, SIR1_SPEED, TXAMP, SPEED_10000_TXAMP);
-	XSIR1_IOWRITE_BITS(priv, SIR1_SPEED, PLLSEL, SPEED_10000_PLL);
-	XSIR1_IOWRITE_BITS(priv, SIR1_SPEED, PI_SPD_SEL, SPEED_10000_CDR);
+	XRXTX_IOWRITE_BITS(priv, RXTX_REG3, TX_DATA_RATE, RXTX_FULL_RATE);
+	XRXTX_IOWRITE_BITS(priv, RXTX_REG3, TX_WORD_MODE, RXTX_66BIT_WORD);
 
-	XRXTX_IOWRITE_BITS(priv, RXTX_REG20, BLWC_ENA, RXTX_10000_BLWC);
-	XRXTX_IOWRITE_BITS(priv, RXTX_REG114, PQ_REG, RXTX_10000_PQ);
+	XRXTX_IOWRITE_BITS(priv, RXTX_REG5, TXAMP_CNTL, RXTX_10G_TX_AMP);
+
+	XRXTX_IOWRITE_BITS(priv, RXTX_REG6, RX_DATA_RATE, RXTX_FULL_RATE);
+	XRXTX_IOWRITE_BITS(priv, RXTX_REG6, RX_WORD_MODE, RXTX_66BIT_WORD);
+
+	XRXTX_IOWRITE_BITS(priv, RXTX_REG20, BLWC_ENA, 0);
+
+	XRXTX_IOWRITE_BITS(priv, RXTX_REG53, RX_PLLSELECT, RXTX_10G_PLL);
+	XRXTX_IOWRITE_BITS(priv, RXTX_REG53, TX_PLLSELECT, RXTX_10G_PLL);
+	XRXTX_IOWRITE_BITS(priv, RXTX_REG53, PI_SPD_SEL_CDR, RXTX_10G_CDR);
+
+	XRXTX_IOWRITE_BITS(priv, RXTX_REG114, PQ_REG, RXTX_10G_PQ);
 
 	amd_xgbe_phy_serdes_complete_ratechange(phydev);
 
+	spin_unlock(&cmu_lock);
+
+	priv->mode = AMD_XGBE_MODE_KR;
+
 	return 0;
 }
 
@@ -510,19 +479,32 @@ static int amd_xgbe_phy_gmii_2500_mode(struct phy_device *phydev)
 		return ret;
 
 	/* Set SerDes to 2.5G speed */
+	spin_lock(&cmu_lock);
+
 	amd_xgbe_phy_serdes_start_ratechange(phydev);
 
-	XSIR1_IOWRITE_BITS(priv, SIR1_SPEED, DATARATE, SPEED_2500_RATE);
-	XSIR1_IOWRITE_BITS(priv, SIR1_SPEED, WORDMODE, SPEED_2500_WORD);
-	XSIR1_IOWRITE_BITS(priv, SIR1_SPEED, TXAMP, SPEED_2500_TXAMP);
-	XSIR1_IOWRITE_BITS(priv, SIR1_SPEED, PLLSEL, SPEED_2500_PLL);
-	XSIR1_IOWRITE_BITS(priv, SIR1_SPEED, PI_SPD_SEL, SPEED_2500_CDR);
+	XRXTX_IOWRITE_BITS(priv, RXTX_REG3, TX_DATA_RATE, RXTX_HALF_RATE);
+	XRXTX_IOWRITE_BITS(priv, RXTX_REG3, TX_WORD_MODE, RXTX_10BIT_WORD);
+
+	XRXTX_IOWRITE_BITS(priv, RXTX_REG5, TXAMP_CNTL, RXTX_1G_TX_AMP);
+
+	XRXTX_IOWRITE_BITS(priv, RXTX_REG6, RX_DATA_RATE, RXTX_HALF_RATE);
+	XRXTX_IOWRITE_BITS(priv, RXTX_REG6, RX_WORD_MODE, RXTX_10BIT_WORD);
 
-	XRXTX_IOWRITE_BITS(priv, RXTX_REG20, BLWC_ENA, RXTX_2500_BLWC);
-	XRXTX_IOWRITE_BITS(priv, RXTX_REG114, PQ_REG, RXTX_2500_PQ);
+	XRXTX_IOWRITE_BITS(priv, RXTX_REG20, BLWC_ENA, 1);
+
+	XRXTX_IOWRITE_BITS(priv, RXTX_REG53, RX_PLLSELECT, RXTX_1G_PLL);
+	XRXTX_IOWRITE_BITS(priv, RXTX_REG53, TX_PLLSELECT, RXTX_1G_PLL);
+	XRXTX_IOWRITE_BITS(priv, RXTX_REG53, PI_SPD_SEL_CDR, RXTX_1G_CDR);
+
+	XRXTX_IOWRITE_BITS(priv, RXTX_REG114, PQ_REG, RXTX_1G_PQ);
 
 	amd_xgbe_phy_serdes_complete_ratechange(phydev);
 
+	spin_unlock(&cmu_lock);
+
+	priv->mode = AMD_XGBE_MODE_KX;
+
 	return 0;
 }
 
@@ -558,47 +540,33 @@ static int amd_xgbe_phy_gmii_mode(struct phy_device *phydev)
 		return ret;
 
 	/* Set SerDes to 1G speed */
+	spin_lock(&cmu_lock);
+
 	amd_xgbe_phy_serdes_start_ratechange(phydev);
 
-	XSIR1_IOWRITE_BITS(priv, SIR1_SPEED, DATARATE, SPEED_1000_RATE);
-	XSIR1_IOWRITE_BITS(priv, SIR1_SPEED, WORDMODE, SPEED_1000_WORD);
-	XSIR1_IOWRITE_BITS(priv, SIR1_SPEED, TXAMP, SPEED_1000_TXAMP);
-	XSIR1_IOWRITE_BITS(priv, SIR1_SPEED, PLLSEL, SPEED_1000_PLL);
-	XSIR1_IOWRITE_BITS(priv, SIR1_SPEED, PI_SPD_SEL, SPEED_1000_CDR);
+	XRXTX_IOWRITE_BITS(priv, RXTX_REG3, TX_DATA_RATE, RXTX_FIFTH_RATE);
+	XRXTX_IOWRITE_BITS(priv, RXTX_REG3, TX_WORD_MODE, RXTX_10BIT_WORD);
 
-	XRXTX_IOWRITE_BITS(priv, RXTX_REG20, BLWC_ENA, RXTX_1000_BLWC);
-	XRXTX_IOWRITE_BITS(priv, RXTX_REG114, PQ_REG, RXTX_1000_PQ);
+	XRXTX_IOWRITE_BITS(priv, RXTX_REG5, TXAMP_CNTL, RXTX_1G_TX_AMP);
 
-	amd_xgbe_phy_serdes_complete_ratechange(phydev);
+	XRXTX_IOWRITE_BITS(priv, RXTX_REG6, RX_DATA_RATE, RXTX_FIFTH_RATE);
+	XRXTX_IOWRITE_BITS(priv, RXTX_REG6, RX_WORD_MODE, RXTX_10BIT_WORD);
 
-	return 0;
-}
+	XRXTX_IOWRITE_BITS(priv, RXTX_REG20, BLWC_ENA, 1);
 
-static int amd_xgbe_phy_cur_mode(struct phy_device *phydev,
-				 enum amd_xgbe_phy_mode *mode)
-{
-	int ret;
-
-	ret = phy_read_mmd(phydev, MDIO_MMD_PCS, MDIO_CTRL2);
-	if (ret < 0)
-		return ret;
+	XRXTX_IOWRITE_BITS(priv, RXTX_REG53, RX_PLLSELECT, RXTX_1G_PLL);
+	XRXTX_IOWRITE_BITS(priv, RXTX_REG53, TX_PLLSELECT, RXTX_1G_PLL);
+	XRXTX_IOWRITE_BITS(priv, RXTX_REG53, PI_SPD_SEL_CDR, RXTX_1G_CDR);
 
-	if ((ret & MDIO_PCS_CTRL2_TYPE) == MDIO_PCS_CTRL2_10GBR)
-		*mode = AMD_XGBE_MODE_KR;
-	else
-		*mode = AMD_XGBE_MODE_KX;
+	XRXTX_IOWRITE_BITS(priv, RXTX_REG114, PQ_REG, RXTX_1G_PQ);
 
-	return 0;
-}
+	amd_xgbe_phy_serdes_complete_ratechange(phydev);
 
-static bool amd_xgbe_phy_in_kr_mode(struct phy_device *phydev)
-{
-	enum amd_xgbe_phy_mode mode;
+	spin_unlock(&cmu_lock);
 
-	if (amd_xgbe_phy_cur_mode(phydev, &mode))
-		return false;
+	priv->mode = AMD_XGBE_MODE_KX;
 
-	return (mode == AMD_XGBE_MODE_KR);
+	return 0;
 }
 
 static int amd_xgbe_phy_switch_mode(struct phy_device *phydev)
@@ -607,7 +575,7 @@ static int amd_xgbe_phy_switch_mode(struct phy_device *phydev)
 	int ret;
 
 	/* If we are in KR switch to KX, and vice-versa */
-	if (amd_xgbe_phy_in_kr_mode(phydev)) {
+	if (priv->mode == AMD_XGBE_MODE_KR) {
 		if (priv->speed_set == AMD_XGBE_PHY_SPEEDSET_1000_10000)
 			ret = amd_xgbe_phy_gmii_mode(phydev);
 		else
@@ -619,20 +587,15 @@ static int amd_xgbe_phy_switch_mode(struct phy_device *phydev)
 	return ret;
 }
 
-static int amd_xgbe_phy_set_mode(struct phy_device *phydev,
-				 enum amd_xgbe_phy_mode mode)
+static enum amd_xgbe_phy_an amd_xgbe_an_switch_mode(struct phy_device *phydev)
 {
-	enum amd_xgbe_phy_mode cur_mode;
 	int ret;
 
-	ret = amd_xgbe_phy_cur_mode(phydev, &cur_mode);
-	if (ret)
-		return ret;
-
-	if (mode != cur_mode)
-		ret = amd_xgbe_phy_switch_mode(phydev);
+	ret = amd_xgbe_phy_switch_mode(phydev);
+	if (ret < 0)
+		return AMD_XGBE_AN_ERROR;
 
-	return ret;
+	return AMD_XGBE_AN_START;
 }
 
 static enum amd_xgbe_phy_an amd_xgbe_an_tx_training(struct phy_device *phydev,
@@ -643,8 +606,8 @@ static enum amd_xgbe_phy_an amd_xgbe_an_tx_training(struct phy_device *phydev,
 
 	*state = AMD_XGBE_RX_COMPLETE;
 
-	/* If we're not in KR mode then we're done */
-	if (!amd_xgbe_phy_in_kr_mode(phydev))
+	/* If we're in KX mode then we're done */
+	if (priv->mode == AMD_XGBE_MODE_KX)
 		return AMD_XGBE_AN_EVENT;
 
 	/* Enable/Disable FEC */
@@ -672,13 +635,9 @@ static enum amd_xgbe_phy_an amd_xgbe_an_tx_training(struct phy_device *phydev,
 	if (ret < 0)
 		return AMD_XGBE_AN_ERROR;
 
-	XSIR0_IOWRITE_BITS(priv, SIR0_KR_RT_1, RESET, 1);
-
 	ret |= 0x01;
 	phy_write_mmd(phydev, MDIO_MMD_PMAPMD, MDIO_PMA_10GBR_PMD_CTRL, ret);
 
-	XSIR0_IOWRITE_BITS(priv, SIR0_KR_RT_1, RESET, 0);
-
 	return AMD_XGBE_AN_EVENT;
 }
 
@@ -702,6 +661,7 @@ static enum amd_xgbe_phy_an amd_xgbe_an_tx_xnp(struct phy_device *phydev,
 static enum amd_xgbe_phy_an amd_xgbe_an_rx_bpa(struct phy_device *phydev,
 					       enum amd_xgbe_phy_rx *state)
 {
+	struct amd_xgbe_phy_priv *priv = phydev->priv;
 	unsigned int link_support;
 	int ret, ad_reg, lp_reg;
 
@@ -711,9 +671,9 @@ static enum amd_xgbe_phy_an amd_xgbe_an_rx_bpa(struct phy_device *phydev,
 		return AMD_XGBE_AN_ERROR;
 
 	/* Check for a supported mode, otherwise restart in a different one */
-	link_support = amd_xgbe_phy_in_kr_mode(phydev) ? 0x80 : 0x20;
+	link_support = (priv->mode == AMD_XGBE_MODE_KR) ? 0x80 : 0x20;
 	if (!(ret & link_support))
-		return AMD_XGBE_AN_INCOMPAT_LINK;
+		return amd_xgbe_an_switch_mode(phydev);
 
 	/* Check Extended Next Page support */
 	ad_reg = phy_read_mmd(phydev, MDIO_MMD_AN, MDIO_AN_ADVERTISE);
@@ -754,7 +714,7 @@ static enum amd_xgbe_phy_an amd_xgbe_an_start(struct phy_device *phydev)
 	int ret;
 
 	/* Be sure we aren't looping trying to negotiate */
-	if (amd_xgbe_phy_in_kr_mode(phydev)) {
+	if (priv->mode == AMD_XGBE_MODE_KR) {
 		if (priv->kr_state != AMD_XGBE_RX_READY)
 			return AMD_XGBE_AN_NO_LINK;
 		priv->kr_state = AMD_XGBE_RX_BPA;
@@ -817,13 +777,6 @@ static enum amd_xgbe_phy_an amd_xgbe_an_start(struct phy_device *phydev)
 	/* Enable and start auto-negotiation */
 	phy_write_mmd(phydev, MDIO_MMD_AN, MDIO_AN_INT, 0);
 
-	ret = phy_read_mmd(phydev, MDIO_MMD_AN, MDIO_AN_KR_CTRL);
-	if (ret < 0)
-		return AMD_XGBE_AN_ERROR;
-
-	ret |= MDIO_KR_CTRL_PDETECT;
-	phy_write_mmd(phydev, MDIO_MMD_AN, MDIO_AN_KR_CTRL, ret);
-
 	ret = phy_read_mmd(phydev, MDIO_MMD_AN, MDIO_CTRL1);
 	if (ret < 0)
 		return AMD_XGBE_AN_ERROR;
@@ -864,8 +817,8 @@ static enum amd_xgbe_phy_an amd_xgbe_an_page_received(struct phy_device *phydev)
 	enum amd_xgbe_phy_rx *state;
 	int ret;
 
-	state = amd_xgbe_phy_in_kr_mode(phydev) ? &priv->kr_state
-						: &priv->kx_state;
+	state = (priv->mode == AMD_XGBE_MODE_KR) ? &priv->kr_state
+						 : &priv->kx_state;
 
 	switch (*state) {
 	case AMD_XGBE_RX_BPA:
@@ -885,13 +838,7 @@ static enum amd_xgbe_phy_an amd_xgbe_an_page_received(struct phy_device *phydev)
 
 static enum amd_xgbe_phy_an amd_xgbe_an_incompat_link(struct phy_device *phydev)
 {
-	int ret;
-
-	ret = amd_xgbe_phy_switch_mode(phydev);
-	if (ret)
-		return AMD_XGBE_AN_ERROR;
-
-	return AMD_XGBE_AN_START;
+	return amd_xgbe_an_switch_mode(phydev);
 }
 
 static void amd_xgbe_an_state_machine(struct work_struct *work)
@@ -904,10 +851,6 @@ static void amd_xgbe_an_state_machine(struct work_struct *work)
 	int sleep;
 	unsigned int an_supported = 0;
 
-	/* Start in KX mode */
-	if (amd_xgbe_phy_set_mode(phydev, AMD_XGBE_MODE_KX))
-		priv->an_state = AMD_XGBE_AN_ERROR;
-
 	while (1) {
 		mutex_lock(&priv->an_mutex);
 
@@ -915,9 +858,8 @@ static void amd_xgbe_an_state_machine(struct work_struct *work)
 
 		switch (priv->an_state) {
 		case AMD_XGBE_AN_START:
-			an_supported = 0;
-			priv->parallel_detect = 0;
 			priv->an_state = amd_xgbe_an_start(phydev);
+			an_supported = 0;
 			break;
 
 		case AMD_XGBE_AN_EVENT:
@@ -934,7 +876,6 @@ static void amd_xgbe_an_state_machine(struct work_struct *work)
 			break;
 
 		case AMD_XGBE_AN_COMPLETE:
-			priv->parallel_detect = an_supported ? 0 : 1;
 			netdev_info(phydev->attached_dev, "%s successful\n",
 				    an_supported ? "Auto negotiation"
 						 : "Parallel detection");
@@ -1070,6 +1011,7 @@ static int amd_xgbe_phy_config_aneg(struct phy_device *phydev)
 {
 	struct amd_xgbe_phy_priv *priv = phydev->priv;
 	u32 mmd_mask = phydev->c45_ids.devices_in_package;
+	int ret;
 
 	if (phydev->autoneg != AUTONEG_ENABLE)
 		return amd_xgbe_phy_setup_forced(phydev);
@@ -1078,6 +1020,11 @@ static int amd_xgbe_phy_config_aneg(struct phy_device *phydev)
 	if (!(mmd_mask & MDIO_DEVS_AN))
 		return -EINVAL;
 
+	/* Get the current speed mode */
+	ret = phy_read_mmd(phydev, MDIO_MMD_PCS, MDIO_CTRL2);
+	if (ret < 0)
+		return ret;
+
 	/* Start/Restart the auto-negotiation state machine */
 	mutex_lock(&priv->an_mutex);
 	priv->an_result = AMD_XGBE_AN_READY;
@@ -1167,14 +1114,18 @@ static int amd_xgbe_phy_read_status(struct phy_device *phydev)
 {
 	struct amd_xgbe_phy_priv *priv = phydev->priv;
 	u32 mmd_mask = phydev->c45_ids.devices_in_package;
-	int ret, ad_ret, lp_ret;
+	int ret, mode, ad_ret, lp_ret;
 
 	ret = amd_xgbe_phy_update_link(phydev);
 	if (ret)
 		return ret;
 
-	if ((phydev->autoneg == AUTONEG_ENABLE) &&
-	    !priv->parallel_detect) {
+	mode = phy_read_mmd(phydev, MDIO_MMD_PCS, MDIO_CTRL2);
+	if (mode < 0)
+		return mode;
+	mode &= MDIO_PCS_CTRL2_TYPE;
+
+	if (phydev->autoneg == AUTONEG_ENABLE) {
 		if (!(mmd_mask & MDIO_DEVS_AN))
 			return -EINVAL;
 
@@ -1205,39 +1156,40 @@ static int amd_xgbe_phy_read_status(struct phy_device *phydev)
 		ad_ret &= lp_ret;
 		if (ad_ret & 0x80) {
 			phydev->speed = SPEED_10000;
-			ret = amd_xgbe_phy_set_mode(phydev, AMD_XGBE_MODE_KR);
-			if (ret)
-				return ret;
+			if (mode != MDIO_PCS_CTRL2_10GBR) {
+				ret = amd_xgbe_phy_xgmii_mode(phydev);
+				if (ret < 0)
+					return ret;
+			}
 		} else {
-			switch (priv->speed_set) {
-			case AMD_XGBE_PHY_SPEEDSET_1000_10000:
-				phydev->speed = SPEED_1000;
-				break;
+			int (*mode_fcn)(struct phy_device *);
 
-			case AMD_XGBE_PHY_SPEEDSET_2500_10000:
+			if (priv->speed_set ==
+			    AMD_XGBE_PHY_SPEEDSET_1000_10000) {
+				phydev->speed = SPEED_1000;
+				mode_fcn = amd_xgbe_phy_gmii_mode;
+			} else {
 				phydev->speed = SPEED_2500;
-				break;
+				mode_fcn = amd_xgbe_phy_gmii_2500_mode;
 			}
 
-			ret = amd_xgbe_phy_set_mode(phydev, AMD_XGBE_MODE_KX);
-			if (ret)
-				return ret;
+			if (mode == MDIO_PCS_CTRL2_10GBR) {
+				ret = mode_fcn(phydev);
+				if (ret < 0)
+					return ret;
+			}
 		}
 
 		phydev->duplex = DUPLEX_FULL;
 	} else {
-		if (amd_xgbe_phy_in_kr_mode(phydev)) {
+		if (mode == MDIO_PCS_CTRL2_10GBR) {
 			phydev->speed = SPEED_10000;
 		} else {
-			switch (priv->speed_set) {
-			case AMD_XGBE_PHY_SPEEDSET_1000_10000:
+			if (priv->speed_set ==
+			    AMD_XGBE_PHY_SPEEDSET_1000_10000)
 				phydev->speed = SPEED_1000;
-				break;
-
-			case AMD_XGBE_PHY_SPEEDSET_2500_10000:
+			else
 				phydev->speed = SPEED_2500;
-				break;
-			}
 		}
 		phydev->duplex = DUPLEX_FULL;
 		phydev->pause = 0;
@@ -1289,29 +1241,188 @@ unlock:
 	return ret;
 }
 
+static int amd_xgbe_phy_map_resources(struct amd_xgbe_phy_priv *priv,
+				      struct platform_device *phy_pdev,
+				      unsigned int phy_resnum)
+{
+	struct device *dev = priv->dev;
+	int ret;
+
+	/* Get the device mmio areas */
+	priv->rxtx_res = platform_get_resource(phy_pdev, IORESOURCE_MEM,
+					       phy_resnum++);
+	priv->rxtx_regs = devm_ioremap_resource(dev, priv->rxtx_res);
+	if (IS_ERR(priv->rxtx_regs)) {
+		dev_err(dev, "rxtx ioremap failed\n");
+		return PTR_ERR(priv->rxtx_regs);
+	}
+
+	/* All xgbe phy devices share the CMU registers so retrieve
+	 * the resource and do the ioremap directly rather than
+	 * the devm_ioremap_resource call
+	 */
+	priv->cmu_res = platform_get_resource(phy_pdev, IORESOURCE_MEM,
+					      phy_resnum++);
+	if (!priv->cmu_res) {
+		dev_err(dev, "cmu invalid resource\n");
+		ret = -EINVAL;
+		goto err_rxtx;
+	}
+	priv->cmu_regs = devm_ioremap_nocache(dev, priv->cmu_res->start,
+					      resource_size(priv->cmu_res));
+	if (!priv->cmu_regs) {
+		dev_err(dev, "cmu ioremap failed\n");
+		ret = -ENOMEM;
+		goto err_rxtx;
+	}
+
+	return 0;
+
+err_rxtx:
+	devm_iounmap(dev, priv->rxtx_regs);
+	devm_release_mem_region(dev, priv->rxtx_res->start,
+				resource_size(priv->rxtx_res));
+
+	return ret;
+}
+
+static void amd_xgbe_phy_unmap_resources(struct amd_xgbe_phy_priv *priv)
+{
+	struct device *dev = priv->dev;
+
+	devm_iounmap(dev, priv->cmu_regs);
+
+	devm_iounmap(dev, priv->rxtx_regs);
+	devm_release_mem_region(dev, priv->rxtx_res->start,
+				resource_size(priv->rxtx_res));
+}
+
+#ifdef CONFIG_ACPI
+static int amd_xgbe_phy_acpi_support(struct amd_xgbe_phy_priv *priv)
+{
+	struct platform_device *phy_pdev = priv->pdev;
+	struct acpi_device *adev = priv->adev;
+	struct device *dev = priv->dev;
+	const union acpi_object *property;
+	int ret;
+
+	/* Map the memory resources */
+	ret = amd_xgbe_phy_map_resources(priv, phy_pdev, 2);
+	if (ret)
+		return ret;
+
+	/* Get the device serdes channel property */
+	ret = acpi_dev_get_property(adev, XGBE_PHY_CHANNEL_PROPERTY,
+				    ACPI_TYPE_INTEGER, &property);
+	if (ret) {
+		dev_err(dev, "unable to obtain %s acpi property\n",
+			XGBE_PHY_CHANNEL_PROPERTY);
+		goto err_resources;
+	}
+	priv->serdes_channel = property->integer.value;
+
+	/* Get the device speed set property */
+	ret = acpi_dev_get_property(adev, XGBE_PHY_SPEEDSET_PROPERTY,
+				    ACPI_TYPE_INTEGER, &property);
+	if (ret) {
+		dev_err(dev, "unable to obtain %s acpi property\n",
+			XGBE_PHY_SPEEDSET_PROPERTY);
+		goto err_resources;
+	}
+	priv->speed_set = property->integer.value;
+
+	return 0;
+
+err_resources:
+	amd_xgbe_phy_unmap_resources(priv);
+
+	return ret;
+}
+#else	/* CONFIG_ACPI */
+static int amd_xgbe_phy_acpi_support(struct amd_xgbe_phy_priv *priv)
+{
+	return -EINVAL;
+}
+#endif	/* CONFIG_ACPI */
+
+#ifdef CONFIG_OF
+static int amd_xgbe_phy_of_support(struct amd_xgbe_phy_priv *priv)
+{
+	struct platform_device *phy_pdev;
+	struct device_node *bus_node;
+	struct device_node *phy_node;
+	struct device *dev = priv->dev;
+	const __be32 *property;
+	int ret;
+
+	bus_node = priv->dev->of_node;
+	phy_node = of_parse_phandle(bus_node, "phy-handle", 0);
+	if (!phy_node) {
+		dev_err(dev, "unable to parse phy-handle\n");
+		return -EINVAL;
+	}
+
+	phy_pdev = of_find_device_by_node(phy_node);
+	if (!phy_pdev) {
+		dev_err(dev, "unable to obtain phy device\n");
+		ret = -EINVAL;
+		goto err_put;
+	}
+
+	/* Map the memory resources */
+	ret = amd_xgbe_phy_map_resources(priv, phy_pdev, 0);
+	if (ret)
+		goto err_put;
+
+	/* Get the device serdes channel property */
+	property = of_get_property(phy_node, XGBE_PHY_CHANNEL_PROPERTY, NULL);
+	if (!property) {
+		dev_err(dev, "unable to obtain %s property\n",
+			XGBE_PHY_CHANNEL_PROPERTY);
+		ret = -EINVAL;
+		goto err_resources;
+	}
+	priv->serdes_channel = be32_to_cpu(*property);
+
+	/* Get the device speed set property */
+	property = of_get_property(phy_node, XGBE_PHY_SPEEDSET_PROPERTY, NULL);
+	if (property)
+		priv->speed_set = be32_to_cpu(*property);
+
+	of_node_put(phy_node);
+
+	return 0;
+
+err_resources:
+	amd_xgbe_phy_unmap_resources(priv);
+
+err_put:
+	of_node_put(phy_node);
+
+	return ret;
+}
+#else	/* CONFIG_OF */
+static int amd_xgbe_phy_of_support(struct amd_xgbe_phy_priv *priv)
+{
+	return -EINVAL;
+}
+#endif	/* CONFIG_OF */
+
 static int amd_xgbe_phy_probe(struct phy_device *phydev)
 {
 	struct amd_xgbe_phy_priv *priv;
-	struct platform_device *pdev;
 	struct device *dev;
 	char *wq_name;
-	const __be32 *property;
-	unsigned int speed_set;
 	int ret;
 
-	if (!phydev->dev.of_node)
+	if (!phydev->bus || !phydev->bus->parent)
 		return -EINVAL;
 
-	pdev = of_find_device_by_node(phydev->dev.of_node);
-	if (!pdev)
-		return -EINVAL;
-	dev = &pdev->dev;
+	dev = phydev->bus->parent;
 
 	wq_name = kasprintf(GFP_KERNEL, "%s-amd-xgbe-phy", phydev->bus->name);
-	if (!wq_name) {
-		ret = -ENOMEM;
-		goto err_pdev;
-	}
+	if (!wq_name)
+		return -ENOMEM;
 
 	priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
 	if (!priv) {
@@ -1319,86 +1430,54 @@ static int amd_xgbe_phy_probe(struct phy_device *phydev)
 		goto err_name;
 	}
 
-	priv->pdev = pdev;
+	priv->pdev = to_platform_device(dev);
+	priv->adev = ACPI_COMPANION(dev);
 	priv->dev = dev;
 	priv->phydev = phydev;
 
-	/* Get the device mmio areas */
-	priv->rxtx_res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	priv->rxtx_regs = devm_ioremap_resource(dev, priv->rxtx_res);
-	if (IS_ERR(priv->rxtx_regs)) {
-		dev_err(dev, "rxtx ioremap failed\n");
-		ret = PTR_ERR(priv->rxtx_regs);
+	if (priv->adev && !acpi_disabled)
+		ret = amd_xgbe_phy_acpi_support(priv);
+	else
+		ret = amd_xgbe_phy_of_support(priv);
+	if (ret)
 		goto err_priv;
-	}
-
-	priv->sir0_res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
-	priv->sir0_regs = devm_ioremap_resource(dev, priv->sir0_res);
-	if (IS_ERR(priv->sir0_regs)) {
-		dev_err(dev, "sir0 ioremap failed\n");
-		ret = PTR_ERR(priv->sir0_regs);
-		goto err_rxtx;
-	}
-
-	priv->sir1_res = platform_get_resource(pdev, IORESOURCE_MEM, 2);
-	priv->sir1_regs = devm_ioremap_resource(dev, priv->sir1_res);
-	if (IS_ERR(priv->sir1_regs)) {
-		dev_err(dev, "sir1 ioremap failed\n");
-		ret = PTR_ERR(priv->sir1_regs);
-		goto err_sir0;
-	}
 
-	/* Get the device speed set property */
-	speed_set = 0;
-	property = of_get_property(dev->of_node, XGBE_PHY_SPEEDSET_PROPERTY,
-				   NULL);
-	if (property)
-		speed_set = be32_to_cpu(*property);
-
-	switch (speed_set) {
-	case 0:
-		priv->speed_set = AMD_XGBE_PHY_SPEEDSET_1000_10000;
-		break;
-	case 1:
-		priv->speed_set = AMD_XGBE_PHY_SPEEDSET_2500_10000;
+	switch (priv->speed_set) {
+	case AMD_XGBE_PHY_SPEEDSET_1000_10000:
+	case AMD_XGBE_PHY_SPEEDSET_2500_10000:
 		break;
 	default:
 		dev_err(dev, "invalid amd,speed-set property\n");
 		ret = -EINVAL;
-		goto err_sir1;
+		goto err_resources;
 	}
 
 	priv->link = 1;
 
+	ret = phy_read_mmd(phydev, MDIO_MMD_PCS, MDIO_CTRL2);
+	if (ret < 0)
+		goto err_resources;
+	if ((ret & MDIO_PCS_CTRL2_TYPE) == MDIO_PCS_CTRL2_10GBR)
+		priv->mode = AMD_XGBE_MODE_KR;
+	else
+		priv->mode = AMD_XGBE_MODE_KX;
+
 	mutex_init(&priv->an_mutex);
 	INIT_WORK(&priv->an_work, amd_xgbe_an_state_machine);
 	priv->an_workqueue = create_singlethread_workqueue(wq_name);
 	if (!priv->an_workqueue) {
 		ret = -ENOMEM;
-		goto err_sir1;
+		goto err_resources;
 	}
 
 	phydev->priv = priv;
 
 	kfree(wq_name);
-	of_dev_put(pdev);
 
 	return 0;
 
-err_sir1:
-	devm_iounmap(dev, priv->sir1_regs);
-	devm_release_mem_region(dev, priv->sir1_res->start,
-				resource_size(priv->sir1_res));
-
-err_sir0:
-	devm_iounmap(dev, priv->sir0_regs);
-	devm_release_mem_region(dev, priv->sir0_res->start,
-				resource_size(priv->sir0_res));
-
-err_rxtx:
-	devm_iounmap(dev, priv->rxtx_regs);
-	devm_release_mem_region(dev, priv->rxtx_res->start,
-				resource_size(priv->rxtx_res));
+err_resources:
+	amd_xgbe_phy_unmap_resources(priv);
 
 err_priv:
 	devm_kfree(dev, priv);
@@ -1406,9 +1485,6 @@ err_priv:
 err_name:
 	kfree(wq_name);
 
-err_pdev:
-	of_dev_put(pdev);
-
 	return ret;
 }
 
@@ -1425,18 +1501,7 @@ static void amd_xgbe_phy_remove(struct phy_device *phydev)
 	flush_workqueue(priv->an_workqueue);
 	destroy_workqueue(priv->an_workqueue);
 
-	/* Release resources */
-	devm_iounmap(dev, priv->sir1_regs);
-	devm_release_mem_region(dev, priv->sir1_res->start,
-				resource_size(priv->sir1_res));
-
-	devm_iounmap(dev, priv->sir0_regs);
-	devm_release_mem_region(dev, priv->sir0_res->start,
-				resource_size(priv->sir0_res));
-
-	devm_iounmap(dev, priv->rxtx_regs);
-	devm_release_mem_region(dev, priv->rxtx_res->start,
-				resource_size(priv->rxtx_res));
+	amd_xgbe_phy_unmap_resources(priv);
 
 	devm_kfree(dev, priv);
 }
diff --git a/drivers/pci/host/pci-xgene.c b/drivers/pci/host/pci-xgene.c
index b1d0596..06b8f97 100644
--- a/drivers/pci/host/pci-xgene.c
+++ b/drivers/pci/host/pci-xgene.c
@@ -29,6 +29,7 @@
 #include <linux/pci.h>
 #include <linux/platform_device.h>
 #include <linux/slab.h>
+#include <linux/acpi.h>
 
 #define PCIECORE_CTLANDSTATUS		0x50
 #define PIM1_1L				0x80
@@ -235,6 +236,13 @@ static int xgene_pcie_read_config(struct pci_bus *bus, unsigned int devfn,
 		break;
 	case 2:
 		xgene_pcie_cfg_in16(addr, offset, val);
+		/* FIXME.
+		 * Something wrong with Configuration Request Retry Status
+		 * on this hw. Pretend it isn't supported until the problem
+		 * gets sorted out properly.
+		 */
+		if (pci_is_root_bus(bus) && offset == (0x40 + PCI_EXP_RTCAP))
+			*val &= ~PCI_EXP_RTCAP_CRSVIS;
 		break;
 	default:
 		xgene_pcie_cfg_in32(addr, offset, val);
@@ -600,6 +608,165 @@ static int xgene_pcie_setup(struct xgene_pcie_port *port,
 	return 0;
 }
 
+#ifdef CONFIG_ACPI
+struct xgene_mcfg_info {
+	void __iomem *csr_base;
+};
+
+/*
+ * When the address bit [17:16] is 2'b01, the Configuration access will be
+ * treated as Type 1 and it will be forwarded to external PCIe device.
+ */
+static void __iomem *__get_cfg_base(struct pci_mmcfg_region *cfg,
+				    unsigned int bus)
+{
+	if (bus > cfg->start_bus)
+		return cfg->virt + AXI_EP_CFG_ACCESS;
+
+	return cfg->virt;
+}
+
+/*
+ * For Configuration request, RTDID register is used as Bus Number,
+ * Device Number and Function number of the header fields.
+ */
+static void __set_rtdid_reg(struct pci_mmcfg_region *cfg,
+			    unsigned int bus, unsigned int devfn)
+{
+	struct xgene_mcfg_info *info = cfg->data;
+	unsigned int b, d, f;
+	u32 rtdid_val = 0;
+
+	b = bus;
+	d = PCI_SLOT(devfn);
+	f = PCI_FUNC(devfn);
+
+	if (bus != cfg->start_bus)
+		rtdid_val = (b << 8) | (d << 3) | f;
+
+	writel(rtdid_val, info->csr_base + RTDID);
+	/* read the register back to ensure flush */
+	readl(info->csr_base + RTDID);
+}
+
+static int xgene_raw_pci_read(struct pci_mmcfg_region *cfg, unsigned int bus,
+			      unsigned int devfn, int offset, int len, u32 *val)
+{
+	void __iomem *addr;
+
+	if (bus == cfg->start_bus) {
+		if (devfn != 0) {
+			*val = 0xffffffff;
+			return PCIBIOS_DEVICE_NOT_FOUND;
+		}
+
+		/* see xgene_pcie_hide_rc_bars() above */
+		if (offset == PCI_BASE_ADDRESS_0 ||
+		    offset == PCI_BASE_ADDRESS_1) {
+			*val = 0;
+			return PCIBIOS_SUCCESSFUL;
+		}
+	}
+
+	__set_rtdid_reg(cfg, bus, devfn);
+	addr = __get_cfg_base(cfg, bus);
+	switch (len) {
+	case 1:
+		xgene_pcie_cfg_in8(addr, offset, val);
+		break;
+	case 2:
+		xgene_pcie_cfg_in16(addr, offset, val);
+		/* FIXME.
+		 * Something wrong with Configuration Request Retry Status
+		 * on this hw. Pretend it isn't supported until the problem
+		 * gets sorted out properly.
+		 */
+		if (bus == cfg->start_bus && offset == (0x40 + PCI_EXP_RTCAP))
+			*val &= ~PCI_EXP_RTCAP_CRSVIS;
+		break;
+	default:
+		xgene_pcie_cfg_in32(addr, offset, val);
+		break;
+	}
+	return PCIBIOS_SUCCESSFUL;
+}
+
+static int xgene_raw_pci_write(struct pci_mmcfg_region *cfg, unsigned int bus,
+			       unsigned int devfn, int offset, int len, u32 val)
+{
+	void __iomem *addr;
+
+	if (bus == cfg->start_bus && devfn != 0)
+		return PCIBIOS_DEVICE_NOT_FOUND;
+
+	__set_rtdid_reg(cfg, bus, devfn);
+	addr = __get_cfg_base(cfg, bus);
+	switch (len) {
+	case 1:
+		xgene_pcie_cfg_out8(addr, offset, (u8)val);
+		break;
+	case 2:
+		xgene_pcie_cfg_out16(addr, offset, (u16)val);
+		break;
+	default:
+		xgene_pcie_cfg_out32(addr, offset, val);
+		break;
+	}
+	return PCIBIOS_SUCCESSFUL;
+}
+
+static acpi_status find_csr_base(struct acpi_resource *acpi_res, void *data)
+{
+	struct pci_mmcfg_region *cfg = data;
+	struct xgene_mcfg_info *info = cfg->data;
+	struct acpi_resource_fixed_memory32 *fixed32;
+
+	if (acpi_res->type == ACPI_RESOURCE_TYPE_FIXED_MEMORY32) {
+		fixed32 = &acpi_res->data.fixed_memory32;
+		info->csr_base = ioremap(fixed32->address,
+					 fixed32->address_length);
+		return AE_CTRL_TERMINATE;
+	}
+	return AE_OK;
+}
+
+static int xgene_mcfg_fixup(struct acpi_pci_root *root,
+			    struct pci_mmcfg_region *cfg)
+{
+	struct acpi_device *device = root->device;
+	struct xgene_mcfg_info *info;
+
+	info = kzalloc(sizeof(*info), GFP_KERNEL);
+	if (info == NULL)
+		return -ENOMEM;
+
+	cfg->data = info;
+
+	acpi_walk_resources(device->handle, METHOD_NAME__CRS,
+			    find_csr_base, cfg);
+
+	if (!info->csr_base) {
+		kfree(info);
+		cfg->data = NULL;
+		return -ENODEV;
+	}
+
+	cfg->read = xgene_raw_pci_read;
+	cfg->write = xgene_raw_pci_write;
+
+	/* actual last bus reachable through this mmconfig */
+	cfg->end_bus = root->secondary.end;
+
+	/* firmware should have done this */
+	xgene_raw_pci_write(cfg, cfg->start_bus, 0, PCI_PRIMARY_BUS, 4,
+			    cfg->start_bus | ((cfg->start_bus + 1) << 8) |
+			    (cfg->end_bus << 16));
+
+	return 0;
+}
+DECLARE_ACPI_MCFG_FIXUP("APM   ", "XGENE   ", xgene_mcfg_fixup);
+#endif /* CONFIG_ACPI */
+
 static int xgene_pcie_probe_bridge(struct platform_device *pdev)
 {
 	struct device_node *dn = pdev->dev.of_node;
diff --git a/drivers/pnp/resource.c b/drivers/pnp/resource.c
index 782e822..d952462 100644
--- a/drivers/pnp/resource.c
+++ b/drivers/pnp/resource.c
@@ -313,6 +313,7 @@ static int pci_dev_uses_irq(struct pnp_dev *pnp, struct pci_dev *pci,
 	progif = class & 0xff;
 	class >>= 8;
 
+#ifdef HAVE_ARCH_PCI_GET_LEGACY_IDE_IRQ
 	if (class == PCI_CLASS_STORAGE_IDE) {
 		/*
 		 * Unless both channels are native-PCI mode only,
@@ -326,6 +327,7 @@ static int pci_dev_uses_irq(struct pnp_dev *pnp, struct pci_dev *pci,
 				return 1;
 			}
 	}
+#endif /* HAVE_ARCH_PCI_GET_LEGACY_IDE_IRQ */
 
 	return 0;
 }
diff --git a/drivers/tty/Kconfig b/drivers/tty/Kconfig
index b24aa01..50fe279 100644
--- a/drivers/tty/Kconfig
+++ b/drivers/tty/Kconfig
@@ -419,4 +419,10 @@ config DA_CONSOLE
 	help
 	  This enables a console on a Dash channel.
 
+config SBSAUART_TTY
+	tristate "SBSA UART TTY Driver"
+	help
+	  Console and system TTY driver for the SBSA UART which is defined
+	  in the Server Base System Architecure document for ARM64 servers.
+
 endif # TTY
diff --git a/drivers/tty/Makefile b/drivers/tty/Makefile
index 58ad1c0..c3211c0 100644
--- a/drivers/tty/Makefile
+++ b/drivers/tty/Makefile
@@ -29,5 +29,6 @@ obj-$(CONFIG_SYNCLINK)		+= synclink.o
 obj-$(CONFIG_PPC_EPAPR_HV_BYTECHAN) += ehv_bytechan.o
 obj-$(CONFIG_GOLDFISH_TTY)	+= goldfish.o
 obj-$(CONFIG_DA_TTY)		+= metag_da.o
+obj-$(CONFIG_SBSAUART_TTY)	+= sbsauart.o
 
 obj-y += ipwireless/
diff --git a/drivers/tty/sbsauart.c b/drivers/tty/sbsauart.c
new file mode 100644
index 0000000..0f44624
--- /dev/null
+++ b/drivers/tty/sbsauart.c
@@ -0,0 +1,358 @@
+/*
+ * SBSA (Server Base System Architecture) Compatible UART driver
+ *
+ * Copyright (C) 2014 Linaro Ltd
+ *
+ * Author: Graeme Gregory <graeme.gregory@linaro.org>
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ */
+
+#include <linux/acpi.h>
+#include <linux/amba/serial.h>
+#include <linux/console.h>
+#include <linux/delay.h>
+#include <linux/interrupt.h>
+#include <linux/io.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/slab.h>
+#include <linux/serial_core.h>
+#include <linux/tty.h>
+#include <linux/tty_flip.h>
+
+struct sbsa_tty {
+	struct tty_port port;
+	spinlock_t lock;
+	void __iomem *base;
+	u32 irq;
+	int opencount;
+	struct console console;
+};
+
+static struct tty_driver *sbsa_tty_driver;
+static struct sbsa_tty *sbsa_tty;
+
+#define SBSAUART_CHAR_MASK	0xFF
+
+static void sbsa_raw_putc(struct uart_port *port, int c)
+{
+	while (readw(port->membase + UART01x_FR) & UART01x_FR_TXFF)
+		;
+	writew(c & 0xFF, port->membase + UART01x_DR);
+}
+
+static void sbsa_uart_early_write(struct console *con, const char *buf,
+				  unsigned count)
+{
+	struct earlycon_device *dev = con->data;
+
+	uart_console_write(&dev->port, buf, count, sbsa_raw_putc);
+}
+
+static int __init sbsa_uart_early_console_setup(struct earlycon_device *device,
+						const char *opt)
+{
+	if (!device->port.membase)
+		return -ENODEV;
+
+	device->con->write = sbsa_uart_early_write;
+	return 0;
+}
+EARLYCON_DECLARE(sbsauart, sbsa_uart_early_console_setup);
+
+static void sbsa_tty_do_write(const char *buf, unsigned count)
+{
+	unsigned long irq_flags;
+	struct sbsa_tty *qtty = sbsa_tty;
+	void __iomem *base = qtty->base;
+	unsigned n;
+
+	spin_lock_irqsave(&qtty->lock, irq_flags);
+	for (n = 0; n < count; n++) {
+		while (readw(base + UART01x_FR) & UART01x_FR_TXFF)
+			;
+		writew(buf[n], base + UART01x_DR);
+	}
+	spin_unlock_irqrestore(&qtty->lock, irq_flags);
+}
+
+static void sbsauart_fifo_to_tty(struct sbsa_tty *qtty)
+{
+	void __iomem *base = qtty->base;
+	unsigned int flag, max_count = 32;
+	u16 status, ch;
+
+	while (max_count--) {
+		status = readw(base + UART01x_FR);
+		if (status & UART01x_FR_RXFE)
+			break;
+
+		/* Take chars from the FIFO and update status */
+		ch = readw(base + UART01x_DR);
+		flag = TTY_NORMAL;
+
+		if (ch & UART011_DR_BE)
+			flag = TTY_BREAK;
+		else if (ch & UART011_DR_PE)
+			flag = TTY_PARITY;
+		else if (ch & UART011_DR_FE)
+			flag = TTY_FRAME;
+		else if (ch & UART011_DR_OE)
+			flag = TTY_OVERRUN;
+
+		ch &= SBSAUART_CHAR_MASK;
+
+		tty_insert_flip_char(&qtty->port, ch, flag);
+	}
+
+	tty_schedule_flip(&qtty->port);
+
+	/* Clear the RX IRQ */
+	writew(UART011_RXIC | UART011_RXIC, base + UART011_ICR);
+}
+
+static irqreturn_t sbsa_tty_interrupt(int irq, void *dev_id)
+{
+	struct sbsa_tty *qtty = sbsa_tty;
+	unsigned long irq_flags;
+
+	spin_lock_irqsave(&qtty->lock, irq_flags);
+	sbsauart_fifo_to_tty(qtty);
+	spin_unlock_irqrestore(&qtty->lock, irq_flags);
+
+	return IRQ_HANDLED;
+}
+
+static int sbsa_tty_open(struct tty_struct *tty, struct file *filp)
+{
+	struct sbsa_tty *qtty = sbsa_tty;
+
+	return tty_port_open(&qtty->port, tty, filp);
+}
+
+static void sbsa_tty_close(struct tty_struct *tty, struct file *filp)
+{
+	tty_port_close(tty->port, tty, filp);
+}
+
+static void sbsa_tty_hangup(struct tty_struct *tty)
+{
+	tty_port_hangup(tty->port);
+}
+
+static int sbsa_tty_write(struct tty_struct *tty, const unsigned char *buf,
+								int count)
+{
+	sbsa_tty_do_write(buf, count);
+	return count;
+}
+
+static int sbsa_tty_write_room(struct tty_struct *tty)
+{
+	return 32;
+}
+
+static void sbsa_tty_console_write(struct console *co, const char *b,
+								unsigned count)
+{
+	sbsa_tty_do_write(b, count);
+
+	if (b[count - 1] == '\n')
+		sbsa_tty_do_write("\r", 1);
+}
+
+static struct tty_driver *sbsa_tty_console_device(struct console *c,
+								int *index)
+{
+	*index = c->index;
+	return sbsa_tty_driver;
+}
+
+static int sbsa_tty_console_setup(struct console *co, char *options)
+{
+	if ((unsigned)co->index > 0)
+		return -ENODEV;
+	if (sbsa_tty->base == NULL)
+		return -ENODEV;
+	return 0;
+}
+
+static struct tty_port_operations sbsa_port_ops = {
+};
+
+static const struct tty_operations sbsa_tty_ops = {
+	.open = sbsa_tty_open,
+	.close = sbsa_tty_close,
+	.hangup = sbsa_tty_hangup,
+	.write = sbsa_tty_write,
+	.write_room = sbsa_tty_write_room,
+};
+
+static int sbsa_tty_create_driver(void)
+{
+	int ret;
+	struct tty_driver *tty;
+
+	sbsa_tty = kzalloc(sizeof(*sbsa_tty), GFP_KERNEL);
+	if (sbsa_tty == NULL) {
+		ret = -ENOMEM;
+		goto err_alloc_sbsa_tty_failed;
+	}
+	tty = alloc_tty_driver(1);
+	if (tty == NULL) {
+		ret = -ENOMEM;
+		goto err_alloc_tty_driver_failed;
+	}
+	tty->driver_name = "sbsauart";
+	tty->name = "ttySBSA";
+	tty->type = TTY_DRIVER_TYPE_SERIAL;
+	tty->subtype = SERIAL_TYPE_NORMAL;
+	tty->init_termios = tty_std_termios;
+	tty->flags = TTY_DRIVER_RESET_TERMIOS | TTY_DRIVER_REAL_RAW |
+						TTY_DRIVER_DYNAMIC_DEV;
+	tty_set_operations(tty, &sbsa_tty_ops);
+	ret = tty_register_driver(tty);
+	if (ret)
+		goto err_tty_register_driver_failed;
+
+	sbsa_tty_driver = tty;
+	return 0;
+
+err_tty_register_driver_failed:
+	put_tty_driver(tty);
+err_alloc_tty_driver_failed:
+	kfree(sbsa_tty);
+	sbsa_tty = NULL;
+err_alloc_sbsa_tty_failed:
+	return ret;
+}
+
+static void sbsa_tty_delete_driver(void)
+{
+	tty_unregister_driver(sbsa_tty_driver);
+	put_tty_driver(sbsa_tty_driver);
+	sbsa_tty_driver = NULL;
+	kfree(sbsa_tty);
+	sbsa_tty = NULL;
+}
+
+static int sbsa_tty_probe(struct platform_device *pdev)
+{
+	struct sbsa_tty *qtty;
+	int ret = -EINVAL;
+	int i;
+	struct resource *r;
+	struct device *ttydev;
+	void __iomem *base;
+	u32 irq;
+
+	r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	if (r == NULL)
+		return -EINVAL;
+
+	base = ioremap(r->start, r->end - r->start);
+	if (base == NULL)
+		pr_err("sbsa_tty: unable to remap base\n");
+
+	r = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
+	if (r == NULL)
+		goto err_unmap;
+
+	irq = r->start;
+
+	if (pdev->id > 0)
+		goto err_unmap;
+
+	ret = sbsa_tty_create_driver();
+	if (ret)
+		goto err_unmap;
+
+	qtty = sbsa_tty;
+	spin_lock_init(&qtty->lock);
+	tty_port_init(&qtty->port);
+	qtty->port.ops = &sbsa_port_ops;
+	qtty->base = base;
+	qtty->irq = irq;
+
+	/* Clear and Mask all IRQs */
+	writew(0, base + UART011_IMSC);
+	writew(0xFFFF, base + UART011_ICR);
+
+	ret = request_irq(irq, sbsa_tty_interrupt, IRQF_SHARED,
+						"sbsa_tty", pdev);
+	if (ret)
+		goto err_request_irq_failed;
+
+	/* Unmask the RX IRQ */
+	writew(UART011_RXIM | UART011_RTIM, base + UART011_IMSC);
+
+	ttydev = tty_port_register_device(&qtty->port, sbsa_tty_driver,
+							0, &pdev->dev);
+	if (IS_ERR(ttydev)) {
+		ret = PTR_ERR(ttydev);
+		goto err_tty_register_device_failed;
+	}
+
+	strcpy(qtty->console.name, "ttySBSA");
+	qtty->console.write = sbsa_tty_console_write;
+	qtty->console.device = sbsa_tty_console_device;
+	qtty->console.setup = sbsa_tty_console_setup;
+	qtty->console.flags = CON_PRINTBUFFER;
+	/* if no console= on cmdline, make this the console device */
+	if (!console_set_on_cmdline)
+		qtty->console.flags |= CON_CONSDEV;
+	qtty->console.index = pdev->id;
+	register_console(&qtty->console);
+
+	return 0;
+
+	tty_unregister_device(sbsa_tty_driver, i);
+err_tty_register_device_failed:
+	free_irq(irq, pdev);
+err_request_irq_failed:
+	sbsa_tty_delete_driver();
+err_unmap:
+	iounmap(base);
+	return ret;
+}
+
+static int sbsa_tty_remove(struct platform_device *pdev)
+{
+	struct sbsa_tty *qtty;
+
+	qtty = sbsa_tty;
+	unregister_console(&qtty->console);
+	tty_unregister_device(sbsa_tty_driver, pdev->id);
+	iounmap(qtty->base);
+	qtty->base = 0;
+	free_irq(qtty->irq, pdev);
+	sbsa_tty_delete_driver();
+	return 0;
+}
+
+static const struct acpi_device_id sbsa_acpi_match[] = {
+	{ "ARMH0011", 0 },
+	{ }
+};
+
+static struct platform_driver sbsa_tty_platform_driver = {
+	.probe = sbsa_tty_probe,
+	.remove = sbsa_tty_remove,
+	.driver = {
+		.name = "sbsa_tty",
+		.acpi_match_table = ACPI_PTR(sbsa_acpi_match),
+	}
+};
+
+module_platform_driver(sbsa_tty_platform_driver);
+
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/tty/serial/8250/8250_dw.c b/drivers/tty/serial/8250/8250_dw.c
index 555de07..3991aa0 100644
--- a/drivers/tty/serial/8250/8250_dw.c
+++ b/drivers/tty/serial/8250/8250_dw.c
@@ -351,10 +351,18 @@ static int dw8250_probe_of(struct uart_port *p,
 static int dw8250_probe_acpi(struct uart_8250_port *up,
 			     struct dw8250_data *data)
 {
+	const struct acpi_device_id *id;
 	struct uart_port *p = &up->port;
 
 	dw8250_setup_port(up);
 
+	id = acpi_match_device(p->dev->driver->acpi_match_table, p->dev);
+	if (!id)
+		return -ENODEV;
+
+	if (!p->uartclk)
+		p->uartclk = (unsigned int)id->driver_data;
+
 	p->iotype = UPIO_MEM32;
 	p->serial_in = dw8250_serial_in32;
 	p->serial_out = dw8250_serial_out32;
@@ -577,6 +585,7 @@ static const struct acpi_device_id dw8250_acpi_match[] = {
 	{ "INT3435", 0 },
 	{ "80860F0A", 0 },
 	{ "8086228A", 0 },
+	{ "APMC0D08", 50000000},
 	{ },
 };
 MODULE_DEVICE_TABLE(acpi, dw8250_acpi_match);
diff --git a/drivers/virtio/virtio_mmio.c b/drivers/virtio/virtio_mmio.c
index 00d115b..cd9b974 100644
--- a/drivers/virtio/virtio_mmio.c
+++ b/drivers/virtio/virtio_mmio.c
@@ -100,8 +100,7 @@
 #include <linux/virtio_config.h>
 #include <linux/virtio_mmio.h>
 #include <linux/virtio_ring.h>
-
-
+#include <linux/acpi.h>
 
 /* The alignment to use between consumer and producer parts of vring.
  * Currently hardcoded to the page size. */
@@ -635,12 +634,21 @@ static struct of_device_id virtio_mmio_match[] = {
 };
 MODULE_DEVICE_TABLE(of, virtio_mmio_match);
 
+#ifdef CONFIG_ACPI
+static const struct acpi_device_id virtio_mmio_acpi_match[] = {
+	{ "LNRO0005", },
+	{ }
+};
+MODULE_DEVICE_TABLE(acpi, virtio_mmio_acpi_match);
+#endif
+
 static struct platform_driver virtio_mmio_driver = {
 	.probe		= virtio_mmio_probe,
 	.remove		= virtio_mmio_remove,
 	.driver		= {
 		.name	= "virtio-mmio",
 		.of_match_table	= virtio_mmio_match,
+		.acpi_match_table = ACPI_PTR(virtio_mmio_acpi_match),
 	},
 };
 
diff --git a/include/acpi/acpi_bus.h b/include/acpi/acpi_bus.h
index 61e32ec..1fec6f5 100644
--- a/include/acpi/acpi_bus.h
+++ b/include/acpi/acpi_bus.h
@@ -69,6 +69,8 @@ bool acpi_check_dsm(acpi_handle handle, const u8 *uuid, int rev, u64 funcs);
 union acpi_object *acpi_evaluate_dsm(acpi_handle handle, const u8 *uuid,
 			int rev, int func, union acpi_object *argv4);
 
+acpi_status acpi_check_coherency(acpi_handle handle, int *val);
+
 static inline union acpi_object *
 acpi_evaluate_dsm_typed(acpi_handle handle, const u8 *uuid, int rev, int func,
 			union acpi_object *argv4, acpi_object_type type)
diff --git a/include/acpi/acpi_io.h b/include/acpi/acpi_io.h
index 444671e..9d573db 100644
--- a/include/acpi/acpi_io.h
+++ b/include/acpi/acpi_io.h
@@ -1,11 +1,17 @@
 #ifndef _ACPI_IO_H_
 #define _ACPI_IO_H_
 
+#include <linux/mm.h>
 #include <linux/io.h>
 
 static inline void __iomem *acpi_os_ioremap(acpi_physical_address phys,
 					    acpi_size size)
 {
+#ifdef CONFIG_ARM64
+	if (!page_is_ram(phys >> PAGE_SHIFT))
+		return ioremap(phys, size);
+#endif
+
        return ioremap_cache(phys, size);
 }
 
diff --git a/include/asm-generic/vmlinux.lds.h b/include/asm-generic/vmlinux.lds.h
index bee5d68..140d514 100644
--- a/include/asm-generic/vmlinux.lds.h
+++ b/include/asm-generic/vmlinux.lds.h
@@ -276,6 +276,13 @@
 		VMLINUX_SYMBOL(__end_pci_fixups_suspend_late) = .;	\
 	}								\
 									\
+	/* ACPI quirks */						\
+	.acpi_fixup        : AT(ADDR(.acpi_fixup) - LOAD_OFFSET) {	\
+		VMLINUX_SYMBOL(__start_acpi_mcfg_fixups) = .;		\
+		*(.acpi_fixup_mcfg)					\
+		VMLINUX_SYMBOL(__end_acpi_mcfg_fixups) = .;		\
+	}								\
+									\
 	/* Built-in firmware blobs */					\
 	.builtin_fw        : AT(ADDR(.builtin_fw) - LOAD_OFFSET) {	\
 		VMLINUX_SYMBOL(__start_builtin_fw) = .;			\
diff --git a/include/kvm/arm_vgic.h b/include/kvm/arm_vgic.h
index ac4888d..d68268d 100644
--- a/include/kvm/arm_vgic.h
+++ b/include/kvm/arm_vgic.h
@@ -290,17 +290,19 @@ bool vgic_handle_mmio(struct kvm_vcpu *vcpu, struct kvm_run *run,
 #define vgic_initialized(k)	(!!((k)->arch.vgic.nr_cpus))
 #define vgic_ready(k)		((k)->arch.vgic.ready)
 
-int vgic_v2_probe(struct device_node *vgic_node,
-		  const struct vgic_ops **ops,
-		  const struct vgic_params **params);
+int vgic_v2_dt_probe(struct device_node *vgic_node,
+		     const struct vgic_ops **ops,
+		     const struct vgic_params **params);
+int vgic_v2_acpi_probe(const struct vgic_ops **ops,
+		       const struct vgic_params **params);
 #ifdef CONFIG_ARM_GIC_V3
-int vgic_v3_probe(struct device_node *vgic_node,
-		  const struct vgic_ops **ops,
-		  const struct vgic_params **params);
+int vgic_v3_dt_probe(struct device_node *vgic_node,
+		     const struct vgic_ops **ops,
+		     const struct vgic_params **params);
 #else
-static inline int vgic_v3_probe(struct device_node *vgic_node,
-				const struct vgic_ops **ops,
-				const struct vgic_params **params)
+static inline int vgic_v3_dt_probe(struct device_node *vgic_node,
+				   const struct vgic_ops **ops,
+				   const struct vgic_params **params)
 {
 	return -ENODEV;
 }
diff --git a/include/linux/acpi.h b/include/linux/acpi.h
index 856d381..13e6200 100644
--- a/include/linux/acpi.h
+++ b/include/linux/acpi.h
@@ -72,6 +72,7 @@ enum acpi_irq_model_id {
 	ACPI_IRQ_MODEL_IOAPIC,
 	ACPI_IRQ_MODEL_IOSAPIC,
 	ACPI_IRQ_MODEL_PLATFORM,
+	ACPI_IRQ_MODEL_GIC,
 	ACPI_IRQ_MODEL_COUNT
 };
 
diff --git a/include/linux/clocksource.h b/include/linux/clocksource.h
index abcafaa..4f5caa1 100644
--- a/include/linux/clocksource.h
+++ b/include/linux/clocksource.h
@@ -346,4 +346,10 @@ extern void clocksource_of_init(void);
 static inline void clocksource_of_init(void) {}
 #endif
 
+#ifdef CONFIG_ACPI
+void acpi_generic_timer_init(void);
+#else
+static inline void acpi_generic_timer_init(void) {}
+#endif
+
 #endif /* _LINUX_CLOCKSOURCE_H */
diff --git a/include/linux/irqchip/arm-gic-acpi.h b/include/linux/irqchip/arm-gic-acpi.h
new file mode 100644
index 0000000..ad5b577
--- /dev/null
+++ b/include/linux/irqchip/arm-gic-acpi.h
@@ -0,0 +1,31 @@
+/*
+ * Copyright (C) 2014, Linaro Ltd.
+ *	Author: Tomasz Nowicki <tomasz.nowicki@linaro.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#ifndef ARM_GIC_ACPI_H_
+#define ARM_GIC_ACPI_H_
+
+#ifdef CONFIG_ACPI
+
+/*
+ * Hard code here, we can not get memory size from MADT (but FDT does),
+ * Actually no need to do that, because this size can be inferred
+ * from GIC spec.
+ */
+#define ACPI_GICV2_DIST_MEM_SIZE	(SZ_4K)
+#define ACPI_GIC_CPU_IF_MEM_SIZE	(SZ_8K)
+
+struct acpi_table_header;
+
+void acpi_gic_init(void);
+int gic_v2_acpi_init(struct acpi_table_header *table);
+#else
+static inline void acpi_gic_init(void) { }
+#endif
+
+#endif /* ARM_GIC_ACPI_H_ */
diff --git a/include/linux/irqchip/arm-gic.h b/include/linux/irqchip/arm-gic.h
index 71d706d..5c55f37 100644
--- a/include/linux/irqchip/arm-gic.h
+++ b/include/linux/irqchip/arm-gic.h
@@ -55,6 +55,8 @@
 					(GICD_INT_DEF_PRI << 8) |\
 					GICD_INT_DEF_PRI)
 
+#define GIC_DIST_SOFTINT_NSATT		0x8000
+
 #define GICH_HCR			0x0
 #define GICH_VTR			0x4
 #define GICH_VMCR			0x8
diff --git a/include/linux/pci.h b/include/linux/pci.h
index 360a966..1476a66 100644
--- a/include/linux/pci.h
+++ b/include/linux/pci.h
@@ -564,15 +564,6 @@ struct pci_ops {
 	int (*write)(struct pci_bus *bus, unsigned int devfn, int where, int size, u32 val);
 };
 
-/*
- * ACPI needs to be able to access PCI config space before we've done a
- * PCI bus scan and created pci_bus structures.
- */
-int raw_pci_read(unsigned int domain, unsigned int bus, unsigned int devfn,
-		 int reg, int len, u32 *val);
-int raw_pci_write(unsigned int domain, unsigned int bus, unsigned int devfn,
-		  int reg, int len, u32 val);
-
 struct pci_bus_region {
 	dma_addr_t start;
 	dma_addr_t end;
@@ -1329,6 +1320,16 @@ typedef int (*arch_set_vga_state_t)(struct pci_dev *pdev, bool decode,
 		      unsigned int command_bits, u32 flags);
 void pci_register_set_vga_state(arch_set_vga_state_t func);
 
+/*
+ * ACPI needs to be able to access PCI config space before we've done a
+ * PCI bus scan and created pci_bus structures.
+ */
+int raw_pci_read(unsigned int domain, unsigned int bus, unsigned int devfn,
+		 int reg, int len, u32 *val);
+int raw_pci_write(unsigned int domain, unsigned int bus, unsigned int devfn,
+		  int reg, int len, u32 val);
+void pcibios_penalize_isa_irq(int irq, int active);
+
 #else /* CONFIG_PCI is not enabled */
 
 /*
@@ -1430,6 +1431,23 @@ static inline struct pci_dev *pci_get_bus_and_slot(unsigned int bus,
 						unsigned int devfn)
 { return NULL; }
 
+static inline struct pci_bus *pci_find_bus(int domain, int busnr)
+{ return NULL; }
+
+static inline int pci_bus_write_config_byte(struct pci_bus *bus,
+				unsigned int devfn, int where, u8 val)
+{ return -ENOSYS; }
+
+static inline int raw_pci_read(unsigned int domain, unsigned int bus,
+			unsigned int devfn, int reg, int len, u32 *val)
+{ return -ENOSYS; }
+
+static inline int raw_pci_write(unsigned int domain, unsigned int bus,
+			unsigned int devfn, int reg, int len, u32 val)
+{ return -ENOSYS; }
+
+static inline void pcibios_penalize_isa_irq(int irq, int active) { }
+
 static inline int pci_domain_nr(struct pci_bus *bus) { return 0; }
 static inline struct pci_dev *pci_dev_get(struct pci_dev *dev) { return NULL; }
 static inline int pci_get_new_domain_nr(void) { return -ENOSYS; }
@@ -1639,7 +1657,6 @@ int pcibios_set_pcie_reset_state(struct pci_dev *dev,
 				 enum pcie_reset_state state);
 int pcibios_add_device(struct pci_dev *dev);
 void pcibios_release_device(struct pci_dev *dev);
-void pcibios_penalize_isa_irq(int irq, int active);
 
 #ifdef CONFIG_HIBERNATE_CALLBACKS
 extern struct dev_pm_ops pcibios_pm_ops;
diff --git a/virt/kvm/arm/arch_timer.c b/virt/kvm/arm/arch_timer.c
index 1c0772b..b9d11aa 100644
--- a/virt/kvm/arm/arch_timer.c
+++ b/virt/kvm/arm/arch_timer.c
@@ -21,9 +21,11 @@
 #include <linux/kvm.h>
 #include <linux/kvm_host.h>
 #include <linux/interrupt.h>
+#include <linux/acpi.h>
 
 #include <clocksource/arm_arch_timer.h>
 #include <asm/arch_timer.h>
+#include <asm/acpi.h>
 
 #include <kvm/arm_vgic.h>
 #include <kvm/arm_arch_timer.h>
@@ -246,60 +248,91 @@ static const struct of_device_id arch_timer_of_match[] = {
 	{},
 };
 
-int kvm_timer_hyp_init(void)
+static int kvm_timer_ppi_parse_dt(unsigned int *ppi)
 {
 	struct device_node *np;
-	unsigned int ppi;
-	int err;
-
-	timecounter = arch_timer_get_timecounter();
-	if (!timecounter)
-		return -ENODEV;
 
 	np = of_find_matching_node(NULL, arch_timer_of_match);
 	if (!np) {
-		kvm_err("kvm_arch_timer: can't find DT node\n");
 		return -ENODEV;
 	}
 
-	ppi = irq_of_parse_and_map(np, 2);
-	if (!ppi) {
-		kvm_err("kvm_arch_timer: no virtual timer interrupt\n");
-		err = -EINVAL;
-		goto out;
+	*ppi = irq_of_parse_and_map(np, 2);
+	if (*ppi == 0) {
+		of_node_put(np);
+		return -EINVAL;
 	}
 
-	err = request_percpu_irq(ppi, kvm_arch_timer_handler,
-				 "kvm guest timer", kvm_get_running_vcpus());
-	if (err) {
-		kvm_err("kvm_arch_timer: can't request interrupt %d (%d)\n",
-			ppi, err);
-		goto out;
-	}
+	return 0;
+}
 
-	host_vtimer_irq = ppi;
+extern int arch_timer_ppi[];
 
-	err = __register_cpu_notifier(&kvm_timer_cpu_nb);
-	if (err) {
-		kvm_err("Cannot register timer CPU notifier\n");
-		goto out_free;
-	}
+static int kvm_timer_ppi_parse_acpi(unsigned int *ppi)
 
-	wqueue = create_singlethread_workqueue("kvm_arch_timer");
-	if (!wqueue) {
-		err = -ENOMEM;
-		goto out_free;
-	}
+{
+	/* retrieve VIRT_PPI info */
+	*ppi = arch_timer_ppi[2];
 
-	kvm_info("%s IRQ%d\n", np->name, ppi);
-	on_each_cpu(kvm_timer_init_interrupt, NULL, 1);
+	if (*ppi == 0)
+		return -EINVAL;
+	else
+		return 0;
+}
+
+int kvm_timer_hyp_init(void)
+{
+	unsigned int ppi;
+	int err;
+
+        timecounter = arch_timer_get_timecounter();
+        if (!timecounter)
+		return -ENODEV;
+
+	/* PPI DT parsing */
+	err = kvm_timer_ppi_parse_dt(&ppi);
 
-	goto out;
+	/* if DT parsing fails, try ACPI next */
+	if (err && !acpi_disabled)
+		err = kvm_timer_ppi_parse_acpi(&ppi);
+
+	if (err) {
+		kvm_err("kvm_timer_hyp_init: can't find virtual timer info or "
+			"config virtual timer interrupt\n");
+		return err;
+	}
+
+	/* configure IRQ handler */
+	err = request_percpu_irq(ppi, kvm_arch_timer_handler,
+                                 "kvm guest timer", kvm_get_running_vcpus());
+        if (err) {
+                kvm_err("kvm_arch_timer: can't request interrupt %d (%d)\n",
+                        ppi, err);
+                goto out;
+        }
+
+        host_vtimer_irq = ppi;
+
+        err = __register_cpu_notifier(&kvm_timer_cpu_nb);
+        if (err) {
+                kvm_err("Cannot register timer CPU notifier\n");
+                goto out_free;
+        }
+
+        wqueue = create_singlethread_workqueue("kvm_arch_timer");
+        if (!wqueue) {
+                err = -ENOMEM;
+                goto out_free;
+        }
+
+        kvm_info("timer IRQ%d\n", ppi);
+        on_each_cpu(kvm_timer_init_interrupt, NULL, 1);
+
+        goto out;
 out_free:
-	free_percpu_irq(ppi, kvm_get_running_vcpus());
+        free_percpu_irq(ppi, kvm_get_running_vcpus());
 out:
-	of_node_put(np);
-	return err;
+        return err;
 }
 
 void kvm_timer_vcpu_terminate(struct kvm_vcpu *vcpu)
diff --git a/virt/kvm/arm/vgic-v2.c b/virt/kvm/arm/vgic-v2.c
index 2935405..510049c 100644
--- a/virt/kvm/arm/vgic-v2.c
+++ b/virt/kvm/arm/vgic-v2.c
@@ -19,6 +19,7 @@
 #include <linux/kvm.h>
 #include <linux/kvm_host.h>
 #include <linux/interrupt.h>
+#include <linux/acpi.h>
 #include <linux/io.h>
 #include <linux/of.h>
 #include <linux/of_address.h>
@@ -26,6 +27,7 @@
 
 #include <linux/irqchip/arm-gic.h>
 
+#include <asm/acpi.h>
 #include <asm/kvm_emulate.h>
 #include <asm/kvm_arm.h>
 #include <asm/kvm_mmu.h>
@@ -159,7 +161,7 @@ static const struct vgic_ops vgic_v2_ops = {
 static struct vgic_params vgic_v2_params;
 
 /**
- * vgic_v2_probe - probe for a GICv2 compatible interrupt controller in DT
+ * vgic_v2_dt_probe - probe for a GICv2 compatible interrupt controller in DT
  * @node:	pointer to the DT node
  * @ops: 	address of a pointer to the GICv2 operations
  * @params:	address of a pointer to HW-specific parameters
@@ -168,7 +170,7 @@ static struct vgic_params vgic_v2_params;
  * in *ops and the HW parameters in *params. Returns an error code
  * otherwise.
  */
-int vgic_v2_probe(struct device_node *vgic_node,
+int vgic_v2_dt_probe(struct device_node *vgic_node,
 		  const struct vgic_ops **ops,
 		  const struct vgic_params **params)
 {
@@ -222,11 +224,22 @@ int vgic_v2_probe(struct device_node *vgic_node,
 	}
 
 	if (!PAGE_ALIGNED(resource_size(&vcpu_res))) {
+#if 0
 		kvm_err("GICV size 0x%llx not a multiple of page size 0x%lx\n",
 			(unsigned long long)resource_size(&vcpu_res),
 			PAGE_SIZE);
 		ret = -ENXIO;
 		goto out_unmap;
+#else
+		/*
+		 * The check fails for arm64 with 64K pagesize and certain firmware.
+		 * Ignore for now until firmware takes care of the problem.
+		 */
+		kvm_info("GICV size 0x%llx not a multiple of page size 0x%lx\n",
+			(unsigned long long)resource_size(&vcpu_res),
+			PAGE_SIZE);
+		kvm_info("Update DT to assign GICV a multiple of kernel page size \n");
+#endif
 	}
 
 	vgic->vcpu_base = vcpu_res.start;
@@ -245,3 +258,72 @@ out:
 	of_node_put(vgic_node);
 	return ret;
 }
+
+struct acpi_madt_generic_interrupt *vgic_acpi;
+static void gic_get_acpi_header(struct acpi_subtable_header *header)
+{
+	vgic_acpi = (struct acpi_madt_generic_interrupt *)header;
+}
+
+int vgic_v2_acpi_probe(const struct vgic_ops **ops,
+		       const struct vgic_params **params)
+{
+	struct vgic_params *vgic = &vgic_v2_params;
+	int irq_mode, ret;
+
+	/* MADT table */
+	ret = acpi_table_parse_madt(ACPI_MADT_TYPE_GENERIC_INTERRUPT,
+			(acpi_tbl_entry_handler)gic_get_acpi_header, 0);
+	if (!ret) {
+		pr_err("Failed to get MADT VGIC CPU entry\n");
+		ret = -ENODEV;
+		goto out;
+	}
+
+	/* IRQ trigger mode */
+	irq_mode = (vgic_acpi->flags & ACPI_MADT_VGIC_IRQ_MODE) ?
+		ACPI_EDGE_SENSITIVE : ACPI_LEVEL_SENSITIVE;
+	/* According to GIC-400 manual, all PPIs are active-LOW, level
+	 *  sensative. We register IRQ as active-low.
+	 */
+	vgic->maint_irq = acpi_register_gsi(NULL, vgic_acpi->vgic_interrupt,
+					    irq_mode, ACPI_ACTIVE_LOW);
+	if (!vgic->maint_irq) {
+		pr_err("Cannot register VGIC ACPI maintenance irq\n");
+		ret = -ENXIO;
+		goto out;
+	}
+
+	/* GICH resource */
+	vgic->vctrl_base = ioremap(vgic_acpi->gich_base_address, SZ_8K);
+	if (!vgic->vctrl_base) {
+		pr_err("cannot ioremap GICH memory\n");
+		ret = -ENOMEM;
+		goto out;
+	}
+
+        vgic->nr_lr = readl_relaxed(vgic->vctrl_base + GICH_VTR);
+        vgic->nr_lr = (vgic->nr_lr & 0x3f) + 1;
+
+        ret = create_hyp_io_mappings(vgic->vctrl_base,
+                                     vgic->vctrl_base + SZ_8K,
+                                     vgic_acpi->gich_base_address);
+        if (ret) {
+                kvm_err("Cannot map GICH into hyp\n");
+		goto out;
+        }
+
+	vgic->vcpu_base = vgic_acpi->gicv_base_address;
+
+	kvm_info("GICH base=0x%llx, GICV base=0x%llx, IRQ=%d\n",
+		 (unsigned long long)vgic_acpi->gich_base_address,
+		 (unsigned long long)vgic_acpi->gicv_base_address,
+		 vgic->maint_irq);
+
+	vgic->type = VGIC_V2;
+	*ops = &vgic_v2_ops;
+	*params = vgic;
+
+out:
+	return ret;
+}
diff --git a/virt/kvm/arm/vgic-v3.c b/virt/kvm/arm/vgic-v3.c
index 1c2c8ee..8b56920 100644
--- a/virt/kvm/arm/vgic-v3.c
+++ b/virt/kvm/arm/vgic-v3.c
@@ -173,7 +173,7 @@ static const struct vgic_ops vgic_v3_ops = {
 static struct vgic_params vgic_v3_params;
 
 /**
- * vgic_v3_probe - probe for a GICv3 compatible interrupt controller in DT
+ * vgic_v3_dt_probe - probe for a GICv3 compatible interrupt controller in DT
  * @node:	pointer to the DT node
  * @ops: 	address of a pointer to the GICv3 operations
  * @params:	address of a pointer to HW-specific parameters
@@ -182,9 +182,9 @@ static struct vgic_params vgic_v3_params;
  * in *ops and the HW parameters in *params. Returns an error code
  * otherwise.
  */
-int vgic_v3_probe(struct device_node *vgic_node,
-		  const struct vgic_ops **ops,
-		  const struct vgic_params **params)
+int vgic_v3_dt_probe(struct device_node *vgic_node,
+		     const struct vgic_ops **ops,
+		     const struct vgic_params **params)
 {
 	int ret = 0;
 	u32 gicv_idx;
diff --git a/virt/kvm/arm/vgic.c b/virt/kvm/arm/vgic.c
index 03affc7..cdd4c64 100644
--- a/virt/kvm/arm/vgic.c
+++ b/virt/kvm/arm/vgic.c
@@ -25,9 +25,11 @@
 #include <linux/of_address.h>
 #include <linux/of_irq.h>
 #include <linux/uaccess.h>
+#include <linux/acpi.h>
 
 #include <linux/irqchip/arm-gic.h>
 
+#include <asm/acpi.h>
 #include <asm/kvm_emulate.h>
 #include <asm/kvm_arm.h>
 #include <asm/kvm_mmu.h>
@@ -2431,8 +2433,8 @@ static struct notifier_block vgic_cpu_nb = {
 };
 
 static const struct of_device_id vgic_ids[] = {
-	{ .compatible = "arm,cortex-a15-gic", .data = vgic_v2_probe, },
-	{ .compatible = "arm,gic-v3", .data = vgic_v3_probe, },
+	{ .compatible = "arm,cortex-a15-gic", .data = vgic_v2_dt_probe, },
+	{ .compatible = "arm,gic-v3", .data = vgic_v3_dt_probe, },
 	{},
 };
 
@@ -2442,20 +2444,26 @@ int kvm_vgic_hyp_init(void)
 	const int (*vgic_probe)(struct device_node *,const struct vgic_ops **,
 				const struct vgic_params **);
 	struct device_node *vgic_node;
-	int ret;
+	int ret = -ENODEV;
 
-	vgic_node = of_find_matching_node_and_match(NULL,
-						    vgic_ids, &matched_id);
-	if (!vgic_node) {
-		kvm_err("error: no compatible GIC node found\n");
-		return -ENODEV;
+	/* probe VGIC */
+	if ((vgic_node = of_find_matching_node_and_match(NULL,
+				vgic_ids, &matched_id))) {
+		/* probe VGIC in DT */
+		vgic_probe = matched_id->data;
+		ret = vgic_probe(vgic_node, &vgic_ops, &vgic);
+	}
+	else if (!acpi_disabled) {
+		/* probe VGIC in ACPI */
+		ret = vgic_v2_acpi_probe(&vgic_ops, &vgic);
 	}
 
-	vgic_probe = matched_id->data;
-	ret = vgic_probe(vgic_node, &vgic_ops, &vgic);
-	if (ret)
+	if (ret) {
+		kvm_err("error: no compatible GIC info found\n");
 		return ret;
+	}
 
+	/* configuration */
 	ret = request_percpu_irq(vgic->maint_irq, vgic_maintenance_handler,
 				 "vgic", kvm_get_running_vcpus());
 	if (ret) {