kernel/patch-5.15-redhat.patch

 Documentation/admin-guide/kernel-parameters.txt    |   9 ++
 Makefile                                           |   4 +
 arch/arm/Kconfig                                   |   4 +-
 arch/arm64/Kconfig                                 |   3 +-
 .../boot/dts/rockchip/rk3399-pinebook-pro.dts      |   6 +-
 arch/arm64/kernel/acpi.c                           |   2 +-
 arch/s390/include/asm/ipl.h                        |   1 +
 arch/s390/kernel/ipl.c                             |   5 +
 arch/s390/kernel/setup.c                           |   4 +
 arch/x86/include/asm/pci_x86.h                     |  10 ++
 arch/x86/kernel/resource.c                         |   4 +
 arch/x86/kernel/setup.c                            |  22 ++--
 arch/x86/pci/acpi.c                                |  49 ++++++--
 arch/x86/pci/common.c                              |   6 +
 crypto/rng.c                                       |  73 +++++++++++-
 drivers/acpi/apei/hest.c                           |   8 ++
 drivers/acpi/irq.c                                 |  17 ++-
 drivers/acpi/scan.c                                |   9 ++
 drivers/ata/libahci.c                              |  18 +++
 drivers/char/ipmi/ipmi_dmi.c                       |  15 +++
 drivers/char/ipmi/ipmi_msghandler.c                |  16 ++-
 drivers/char/random.c                              | 115 +++++++++++++++++++
 drivers/firmware/efi/Makefile                      |   1 +
 drivers/firmware/efi/efi.c                         | 124 +++++++++++++++------
 drivers/firmware/efi/secureboot.c                  |  38 +++++++
 drivers/hid/hid-rmi.c                              |  64 -----------
 drivers/hwtracing/coresight/coresight-etm4x-core.c |  19 ++++
 drivers/input/rmi4/rmi_driver.c                    | 124 ++++++++++++---------
 drivers/iommu/iommu.c                              |  22 ++++
 .../aquantia/atlantic/hw_atl/hw_atl_utils.c        |  10 ++
 drivers/net/wireless/marvell/mwifiex/usb.c         |   3 +-
 drivers/nvme/host/core.c                           |  22 +++-
 drivers/nvme/host/multipath.c                      |  19 ++--
 drivers/nvme/host/nvme.h                           |   4 +
 drivers/pci/quirks.c                               |  24 ++++
 drivers/usb/core/hub.c                             |   7 ++
 drivers/usb/host/xhci-tegra.c                      |  41 +++++--
 fs/btrfs/async-thread.c                            |  14 +++
 include/linux/efi.h                                |  22 ++--
 include/linux/lsm_hook_defs.h                      |   2 +
 include/linux/lsm_hooks.h                          |   6 +
 include/linux/random.h                             |   7 ++
 include/linux/rmi.h                                |   1 +
 include/linux/security.h                           |   5 +
 init/Kconfig                                       |   2 +-
 kernel/module_signing.c                            |   9 +-
 scripts/tags.sh                                    |   2 +
 security/integrity/platform_certs/load_uefi.c      |   6 +-
 security/lockdown/Kconfig                          |  13 +++
 security/lockdown/lockdown.c                       |   1 +
 security/security.c                                |   6 +
 51 files changed, 803 insertions(+), 215 deletions(-)

diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt
index 1396fd2d9031..4bc97128cee8 100644
--- a/Documentation/admin-guide/kernel-parameters.txt
+++ b/Documentation/admin-guide/kernel-parameters.txt
@@ -3949,6 +3949,15 @@
 				please report a bug.
 		nocrs		[X86] Ignore PCI host bridge windows from ACPI.
 				If you need to use this, please report a bug.
+		use_e820	[X86] Use E820 reservations to exclude parts of
+				PCI host bridge windows. This is a workaround
+				for BIOS defects in host bridge _CRS methods.
+				If you need to use this, please report a bug to
+				<linux-pci@vger.kernel.org>.
+		no_e820		[X86] Ignore E820 reservations for PCI host
+				bridge windows. This is the default on modern
+				hardware. If you need to use this, please report
+				a bug to <linux-pci@vger.kernel.org>.
 		routeirq	Do IRQ routing for all PCI devices.
 				This is normally done in pci_enable_device(),
 				so this option is a temporary workaround
diff --git a/Makefile b/Makefile
index 759e68a02cf0..4a73bba0225f 100644
--- a/Makefile
+++ b/Makefile
@@ -18,6 +18,10 @@ $(if $(filter __%, $(MAKECMDGOALS)), \
 PHONY := __all
 __all:

+# Set RHEL variables
+# Use this spot to avoid future merge conflicts
+include Makefile.rhelver
+
 # We are using a recursive build, so we need to do a little thinking
 # to get the ordering right.
 #
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index dcf2df6da98f..b03b682850ab 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -1470,9 +1470,9 @@ config HIGHMEM
 	  If unsure, say n.

 config HIGHPTE
-	bool "Allocate 2nd-level pagetables from highmem" if EXPERT
+	bool "Allocate 2nd-level pagetables from highmem"
 	depends on HIGHMEM
-	default y
+	default n
 	help
 	  The VM uses one page of physical memory for each page table.
 	  For systems with a lot of processes, this can use a lot of
diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig
index fee914c716aa..99bb34aac703 100644
--- a/arch/arm64/Kconfig
+++ b/arch/arm64/Kconfig
@@ -911,7 +911,7 @@ endchoice

 config ARM64_FORCE_52BIT
 	bool "Force 52-bit virtual addresses for userspace"
-	depends on ARM64_VA_BITS_52 && EXPERT
+	depends on ARM64_VA_BITS_52
 	help
 	  For systems with 52-bit userspace VAs enabled, the kernel will attempt
 	  to maintain compatibility with older software by providing 48-bit VAs
@@ -1152,6 +1152,7 @@ config XEN
 config FORCE_MAX_ZONEORDER
 	int
 	default "14" if ARM64_64K_PAGES
+	default "13" if (ARCH_THUNDER && !ARM64_64K_PAGES)
 	default "12" if ARM64_16K_PAGES
 	default "11"
 	help
diff --git a/arch/arm64/boot/dts/rockchip/rk3399-pinebook-pro.dts b/arch/arm64/boot/dts/rockchip/rk3399-pinebook-pro.dts
index 2b5f001ff4a6..dae8c252bc2b 100644
--- a/arch/arm64/boot/dts/rockchip/rk3399-pinebook-pro.dts
+++ b/arch/arm64/boot/dts/rockchip/rk3399-pinebook-pro.dts
@@ -385,10 +385,6 @@ mains_charger: dc-charger {
 	};
 };

-&cdn_dp {
-	status = "okay";
-};
-
 &cpu_b0 {
 	cpu-supply = <&vdd_cpu_b>;
 };
@@ -711,7 +707,7 @@ fusb0: fusb30x@22 {

 		connector {
 			compatible = "usb-c-connector";
-			data-role = "host";
+			data-role = "dual";
 			label = "USB-C";
 			op-sink-microwatt = <1000000>;
 			power-role = "dual";
diff --git a/arch/arm64/kernel/acpi.c b/arch/arm64/kernel/acpi.c
index f3851724fe35..cac21da49455 100644
--- a/arch/arm64/kernel/acpi.c
+++ b/arch/arm64/kernel/acpi.c
@@ -40,7 +40,7 @@ int acpi_pci_disabled = 1;	/* skip ACPI PCI scan and IRQ initialization */
 EXPORT_SYMBOL(acpi_pci_disabled);

 static bool param_acpi_off __initdata;
-static bool param_acpi_on __initdata;
+static bool param_acpi_on __initdata = true;
 static bool param_acpi_force __initdata;

 static int __init parse_acpi(char *arg)
diff --git a/arch/s390/include/asm/ipl.h b/arch/s390/include/asm/ipl.h
index 3f8ee257f9aa..3ab92feb6241 100644
--- a/arch/s390/include/asm/ipl.h
+++ b/arch/s390/include/asm/ipl.h
@@ -128,6 +128,7 @@ int ipl_report_add_component(struct ipl_report *report, struct kexec_buf *kbuf,
 			     unsigned char flags, unsigned short cert);
 int ipl_report_add_certificate(struct ipl_report *report, void *key,
 			       unsigned long addr, unsigned long len);
+bool ipl_get_secureboot(void);

 /*
  * DIAG 308 support
diff --git a/arch/s390/kernel/ipl.c b/arch/s390/kernel/ipl.c
index e2cc35775b99..96fc8134f056 100644
--- a/arch/s390/kernel/ipl.c
+++ b/arch/s390/kernel/ipl.c
@@ -2215,3 +2215,8 @@ int ipl_report_free(struct ipl_report *report)
 }

 #endif
+
+bool ipl_get_secureboot(void)
+{
+	return !!ipl_secure_flag;
+}
diff --git a/arch/s390/kernel/setup.c b/arch/s390/kernel/setup.c
index 67e5fff96ee0..0d58c1f07176 100644
--- a/arch/s390/kernel/setup.c
+++ b/arch/s390/kernel/setup.c
@@ -49,6 +49,7 @@
 #include <linux/memory.h>
 #include <linux/compat.h>
 #include <linux/start_kernel.h>
+#include <linux/security.h>
 #include <linux/hugetlb.h>
 #include <linux/kmemleak.h>

@@ -981,6 +982,9 @@ void __init setup_arch(char **cmdline_p)

 	log_component_list();

+	if (ipl_get_secureboot())
+		security_lock_kernel_down("Secure IPL mode", LOCKDOWN_INTEGRITY_MAX);
+
 	/* Have one command line that is parsed and saved in /proc/cmdline */
 	/* boot_command_line has been already set up in early.c */
 	*cmdline_p = boot_command_line;
diff --git a/arch/x86/include/asm/pci_x86.h b/arch/x86/include/asm/pci_x86.h
index 490411dba438..0bb4e7dd0ffc 100644
--- a/arch/x86/include/asm/pci_x86.h
+++ b/arch/x86/include/asm/pci_x86.h
@@ -39,6 +39,8 @@ do {						\
 #define PCI_ROOT_NO_CRS		0x100000
 #define PCI_NOASSIGN_BARS	0x200000
 #define PCI_BIG_ROOT_WINDOW	0x400000
+#define PCI_USE_E820		0x800000
+#define PCI_NO_E820		0x1000000

 extern unsigned int pci_probe;
 extern unsigned long pirq_table_addr;
@@ -64,6 +66,8 @@ void pcibios_scan_specific_bus(int busn);

 /* pci-irq.c */

+struct pci_dev;
+
 struct irq_info {
 	u8 bus, devfn;			/* Bus, device and function */
 	struct {
@@ -232,3 +236,9 @@ static inline void mmio_config_writel(void __iomem *pos, u32 val)
 # define x86_default_pci_init_irq	NULL
 # define x86_default_pci_fixup_irqs	NULL
 #endif
+
+#if defined(CONFIG_PCI) && defined(CONFIG_ACPI)
+extern bool pci_use_e820;
+#else
+#define pci_use_e820 false
+#endif
diff --git a/arch/x86/kernel/resource.c b/arch/x86/kernel/resource.c
index 9b9fb7882c20..e8dc9bc327bd 100644
--- a/arch/x86/kernel/resource.c
+++ b/arch/x86/kernel/resource.c
@@ -1,6 +1,7 @@
 // SPDX-License-Identifier: GPL-2.0
 #include <linux/ioport.h>
 #include <asm/e820/api.h>
+#include <asm/pci_x86.h>

 static void resource_clip(struct resource *res, resource_size_t start,
 			  resource_size_t end)
@@ -28,6 +29,9 @@ static void remove_e820_regions(struct resource *avail)
 	int i;
 	struct e820_entry *entry;

+	if (!pci_use_e820)
+		return;
+
 	for (i = 0; i < e820_table->nr_entries; i++) {
 		entry = &e820_table->entries[i];

diff --git a/arch/x86/kernel/setup.c b/arch/x86/kernel/setup.c
index 40ed44ead063..31aac8c787cf 100644
--- a/arch/x86/kernel/setup.c
+++ b/arch/x86/kernel/setup.c
@@ -20,6 +20,7 @@
 #include <linux/root_dev.h>
 #include <linux/hugetlb.h>
 #include <linux/tboot.h>
+#include <linux/security.h>
 #include <linux/usb/xhci-dbgp.h>
 #include <linux/static_call.h>
 #include <linux/swiotlb.h>
@@ -929,6 +930,13 @@ void __init setup_arch(char **cmdline_p)
 	if (efi_enabled(EFI_BOOT))
 		efi_init();

+	efi_set_secure_boot(boot_params.secure_boot);
+
+#ifdef CONFIG_LOCK_DOWN_IN_EFI_SECURE_BOOT
+	if (efi_enabled(EFI_SECURE_BOOT))
+		security_lock_kernel_down("EFI Secure Boot mode", LOCKDOWN_INTEGRITY_MAX);
+#endif
+
 	dmi_setup();

 	/*
@@ -1094,19 +1102,7 @@ void __init setup_arch(char **cmdline_p)
 	/* Allocate bigger log buffer */
 	setup_log_buf(1);

-	if (efi_enabled(EFI_BOOT)) {
-		switch (boot_params.secure_boot) {
-		case efi_secureboot_mode_disabled:
-			pr_info("Secure boot disabled\n");
-			break;
-		case efi_secureboot_mode_enabled:
-			pr_info("Secure boot enabled\n");
-			break;
-		default:
-			pr_info("Secure boot could not be determined\n");
-			break;
-		}
-	}
+	efi_set_secure_boot(boot_params.secure_boot);

 	reserve_initrd();

diff --git a/arch/x86/pci/acpi.c b/arch/x86/pci/acpi.c
index 948656069cdd..f357dac92610 100644
--- a/arch/x86/pci/acpi.c
+++ b/arch/x86/pci/acpi.c
@@ -1,4 +1,7 @@
 // SPDX-License-Identifier: GPL-2.0
+
+#define pr_fmt(fmt) "PCI: " fmt
+
 #include <linux/pci.h>
 #include <linux/acpi.h>
 #include <linux/init.h>
@@ -21,6 +24,8 @@ struct pci_root_info {

 static bool pci_use_crs = true;
 static bool pci_ignore_seg = false;
+/* Consumed in arch/x86/kernel/resource.c */
+bool pci_use_e820 = false;

 static int __init set_use_crs(const struct dmi_system_id *id)
 {
@@ -36,7 +41,7 @@ static int __init set_nouse_crs(const struct dmi_system_id *id)

 static int __init set_ignore_seg(const struct dmi_system_id *id)
 {
-	printk(KERN_INFO "PCI: %s detected: ignoring ACPI _SEG\n", id->ident);
+	pr_info("%s detected: ignoring ACPI _SEG\n", id->ident);
 	pci_ignore_seg = true;
 	return 0;
 }
@@ -156,10 +161,35 @@ void __init pci_acpi_crs_quirks(void)
 	else if (pci_probe & PCI_USE__CRS)
 		pci_use_crs = true;

-	printk(KERN_INFO "PCI: %s host bridge windows from ACPI; "
-	       "if necessary, use \"pci=%s\" and report a bug\n",
-	       pci_use_crs ? "Using" : "Ignoring",
-	       pci_use_crs ? "nocrs" : "use_crs");
+	pr_info("%s host bridge windows from ACPI; if necessary, use \"pci=%s\" and report a bug\n",
+		pci_use_crs ? "Using" : "Ignoring",
+		pci_use_crs ? "nocrs" : "use_crs");
+
+	/*
+	 * Some BIOS-es contain a bug where they add addresses which map to
+	 * system RAM in the PCI host bridge window returned by the ACPI _CRS
+	 * method, see commit 4dc2287c1805 ("x86: avoid E820 regions when
+	 * allocating address space"). To avoid this Linux by default excludes
+	 * E820 reservations when allocating addresses since 2010.
+	 * In 2020 some systems have shown-up with E820 reservations which cover
+	 * the entire _CRS returned PCI host bridge window, causing all attempts
+	 * to assign memory to PCI BARs to fail if Linux uses E820 reservations.
+	 *
+	 * Ideally Linux would fully stop using E820 reservations, but then
+	 * the old systems this was added for will regress.
+	 * Instead keep the old behavior for old systems, while ignoring the
+	 * E820 reservations for any systems from now on.
+	 */
+	if (year >= 0 && year < 2018)
+		pci_use_e820 = true;
+
+	if (pci_probe & PCI_NO_E820)
+		pci_use_e820 = false;
+	else if (pci_probe & PCI_USE_E820)
+		pci_use_e820 = true;
+
+	pr_info("%s E820 reservations for host bridge windows\n",
+		pci_use_e820 ? "Using" : "Ignoring");
 }

 #ifdef	CONFIG_PCI_MMCONFIG
@@ -334,9 +364,8 @@ struct pci_bus *pci_acpi_scan_root(struct acpi_pci_root *root)
 		root->segment = domain = 0;

 	if (domain && !pci_domains_supported) {
-		printk(KERN_WARNING "pci_bus %04x:%02x: "
-		       "ignored (multiple domains not supported)\n",
-		       domain, busnum);
+		pr_warn("pci_bus %04x:%02x: ignored (multiple domains not supported)\n",
+			domain, busnum);
 		return NULL;
 	}

@@ -404,7 +433,7 @@ int __init pci_acpi_init(void)
 	if (acpi_noirq)
 		return -ENODEV;

-	printk(KERN_INFO "PCI: Using ACPI for IRQ routing\n");
+	pr_info("Using ACPI for IRQ routing\n");
 	acpi_irq_penalty_init();
 	pcibios_enable_irq = acpi_pci_irq_enable;
 	pcibios_disable_irq = acpi_pci_irq_disable;
@@ -416,7 +445,7 @@ int __init pci_acpi_init(void)
 		 * also do it here in case there are still broken drivers that
 		 * don't use pci_enable_device().
 		 */
-		printk(KERN_INFO "PCI: Routing PCI interrupts for all devices because \"pci=routeirq\" specified\n");
+		pr_info("Routing PCI interrupts for all devices because \"pci=routeirq\" specified\n");
 		for_each_pci_dev(dev)
 			acpi_pci_irq_enable(dev);
 	}
diff --git a/arch/x86/pci/common.c b/arch/x86/pci/common.c
index 3507f456fcd0..091ec7e94fcb 100644
--- a/arch/x86/pci/common.c
+++ b/arch/x86/pci/common.c
@@ -595,6 +595,12 @@ char *__init pcibios_setup(char *str)
 	} else if (!strcmp(str, "nocrs")) {
 		pci_probe |= PCI_ROOT_NO_CRS;
 		return NULL;
+	} else if (!strcmp(str, "use_e820")) {
+		pci_probe |= PCI_USE_E820;
+		return NULL;
+	} else if (!strcmp(str, "no_e820")) {
+		pci_probe |= PCI_NO_E820;
+		return NULL;
 #ifdef CONFIG_PHYS_ADDR_T_64BIT
 	} else if (!strcmp(str, "big_root_window")) {
 		pci_probe |= PCI_BIG_ROOT_WINDOW;
diff --git a/crypto/rng.c b/crypto/rng.c
index fea082b25fe4..50a9d040bed1 100644
--- a/crypto/rng.c
+++ b/crypto/rng.c
@@ -11,14 +11,17 @@
 #include <linux/atomic.h>
 #include <crypto/internal/rng.h>
 #include <linux/err.h>
+#include <linux/fips.h>
+#include <linux/kernel.h>
 #include <linux/module.h>
 #include <linux/mutex.h>
 #include <linux/random.h>
 #include <linux/seq_file.h>
+#include <linux/sched.h>
+#include <linux/sched/signal.h>
 #include <linux/slab.h>
 #include <linux/string.h>
 #include <linux/cryptouser.h>
-#include <linux/compiler.h>
 #include <net/netlink.h>

 #include "internal.h"
@@ -224,5 +227,73 @@ void crypto_unregister_rngs(struct rng_alg *algs, int count)
 }
 EXPORT_SYMBOL_GPL(crypto_unregister_rngs);

+static ssize_t crypto_devrandom_read(void __user *buf, size_t buflen)
+{
+	u8 tmp[256];
+	ssize_t ret;
+
+	if (!buflen)
+		return 0;
+
+	ret = crypto_get_default_rng();
+	if (ret)
+		return ret;
+
+	for (;;) {
+		int err;
+		int i;
+
+		i = min_t(int, buflen, sizeof(tmp));
+		err = crypto_rng_get_bytes(crypto_default_rng, tmp, i);
+		if (err) {
+			ret = err;
+			break;
+		}
+
+		if (copy_to_user(buf, tmp, i)) {
+			ret = -EFAULT;
+			break;
+		}
+
+		buflen -= i;
+		buf += i;
+		ret += i;
+
+		if (!buflen)
+			break;
+
+		if (need_resched()) {
+			if (signal_pending(current))
+				break;
+			schedule();
+		}
+	}
+
+	crypto_put_default_rng();
+	memzero_explicit(tmp, sizeof(tmp));
+
+	return ret;
+}
+
+static const struct random_extrng crypto_devrandom_rng = {
+	.extrng_read = crypto_devrandom_read,
+	.owner = THIS_MODULE,
+};
+
+static int __init crypto_rng_init(void)
+{
+	if (fips_enabled)
+		random_register_extrng(&crypto_devrandom_rng);
+	return 0;
+}
+
+static void __exit crypto_rng_exit(void)
+{
+	random_unregister_extrng();
+}
+
+late_initcall(crypto_rng_init);
+module_exit(crypto_rng_exit);
+
 MODULE_LICENSE("GPL");
 MODULE_DESCRIPTION("Random Number Generator");
diff --git a/drivers/acpi/apei/hest.c b/drivers/acpi/apei/hest.c
index 277f00b288d1..adbce15c273d 100644
--- a/drivers/acpi/apei/hest.c
+++ b/drivers/acpi/apei/hest.c
@@ -94,6 +94,14 @@ int apei_hest_parse(apei_hest_func_t func, void *data)
 	if (hest_disable || !hest_tab)
 		return -EINVAL;

+#ifdef CONFIG_ARM64
+	/* Ignore broken firmware */
+	if (!strncmp(hest_tab->header.oem_id, "HPE   ", 6) &&
+	    !strncmp(hest_tab->header.oem_table_id, "ProLiant", 8) &&
+	    MIDR_IMPLEMENTOR(read_cpuid_id()) == ARM_CPU_IMP_APM)
+		return -EINVAL;
+#endif
+
 	hest_hdr = (struct acpi_hest_header *)(hest_tab + 1);
 	for (i = 0; i < hest_tab->error_source_count; i++) {
 		len = hest_esrc_len(hest_hdr);
diff --git a/drivers/acpi/irq.c b/drivers/acpi/irq.c
index c68e694fca26..146cba5ae5bc 100644
--- a/drivers/acpi/irq.c
+++ b/drivers/acpi/irq.c
@@ -130,6 +130,7 @@ struct acpi_irq_parse_one_ctx {
 	unsigned int index;
 	unsigned long *res_flags;
 	struct irq_fwspec *fwspec;
+	bool skip_producer_check;
 };

 /**
@@ -201,7 +202,8 @@ static acpi_status acpi_irq_parse_one_cb(struct acpi_resource *ares,
 		return AE_CTRL_TERMINATE;
 	case ACPI_RESOURCE_TYPE_EXTENDED_IRQ:
 		eirq = &ares->data.extended_irq;
-		if (eirq->producer_consumer == ACPI_PRODUCER)
+		if (!ctx->skip_producer_check &&
+		    eirq->producer_consumer == ACPI_PRODUCER)
 			return AE_OK;
 		if (ctx->index >= eirq->interrupt_count) {
 			ctx->index -= eirq->interrupt_count;
@@ -236,8 +238,19 @@ static acpi_status acpi_irq_parse_one_cb(struct acpi_resource *ares,
 static int acpi_irq_parse_one(acpi_handle handle, unsigned int index,
 			      struct irq_fwspec *fwspec, unsigned long *flags)
 {
-	struct acpi_irq_parse_one_ctx ctx = { -EINVAL, index, flags, fwspec };
+	struct acpi_irq_parse_one_ctx ctx = { -EINVAL, index, flags, fwspec, false };

+	/*
+	 * Firmware on arm64-based HPE m400 platform incorrectly marks
+	 * its UART interrupt as ACPI_PRODUCER rather than ACPI_CONSUMER.
+	 * Don't do the producer/consumer check for that device.
+	 */
+	if (IS_ENABLED(CONFIG_ARM64)) {
+		struct acpi_device *adev = acpi_bus_get_acpi_device(handle);
+
+		if (adev && !strcmp(acpi_device_hid(adev), "APMC0D08"))
+			ctx.skip_producer_check = true;
+	}
 	acpi_walk_resources(handle, METHOD_NAME__CRS, acpi_irq_parse_one_cb, &ctx);
 	return ctx.rc;
 }
diff --git a/drivers/acpi/scan.c b/drivers/acpi/scan.c
index 5b54c80b9d32..86c314f8d8a0 100644
--- a/drivers/acpi/scan.c
+++ b/drivers/acpi/scan.c
@@ -1720,6 +1720,15 @@ static bool acpi_device_enumeration_by_parent(struct acpi_device *device)
 	if (!acpi_match_device_ids(device, i2c_multi_instantiate_ids))
 		return false;

+	/*
+	 * Firmware on some arm64 X-Gene platforms will make the UART
+	 * device appear as both a UART and a slave of that UART. Just
+	 * bail out here for X-Gene UARTs.
+	 */
+	if (IS_ENABLED(CONFIG_ARM64) &&
+	    !strcmp(acpi_device_hid(device), "APMC0D08"))
+		return false;
+
 	INIT_LIST_HEAD(&resource_list);
 	acpi_dev_get_resources(device, &resource_list,
 			       acpi_check_serial_bus_slave,
diff --git a/drivers/ata/libahci.c b/drivers/ata/libahci.c
index 5b3fa2cbe722..ad46d87e17e2 100644
--- a/drivers/ata/libahci.c
+++ b/drivers/ata/libahci.c
@@ -672,6 +672,24 @@ int ahci_stop_engine(struct ata_port *ap)
 	tmp &= ~PORT_CMD_START;
 	writel(tmp, port_mmio + PORT_CMD);

+#ifdef CONFIG_ARM64
+	/* Rev Ax of Cavium CN99XX needs a hack for port stop */
+	if (dev_is_pci(ap->host->dev) &&
+	    to_pci_dev(ap->host->dev)->vendor == 0x14e4 &&
+	    to_pci_dev(ap->host->dev)->device == 0x9027 &&
+	    midr_is_cpu_model_range(read_cpuid_id(),
+			MIDR_CPU_MODEL(ARM_CPU_IMP_BRCM, BRCM_CPU_PART_VULCAN),
+			MIDR_CPU_VAR_REV(0, 0),
+			MIDR_CPU_VAR_REV(0, MIDR_REVISION_MASK))) {
+		tmp = readl(hpriv->mmio + 0x8000);
+		udelay(100);
+		writel(tmp | (1 << 26), hpriv->mmio + 0x8000);
+		udelay(100);
+		writel(tmp & ~(1 << 26), hpriv->mmio + 0x8000);
+		dev_warn(ap->host->dev, "CN99XX SATA reset workaround applied\n");
+	}
+#endif
+
 	/* wait for engine to stop. This could be as long as 500 msec */
 	tmp = ata_wait_register(ap, port_mmio + PORT_CMD,
 				PORT_CMD_LIST_ON, PORT_CMD_LIST_ON, 1, 500);
diff --git a/drivers/char/ipmi/ipmi_dmi.c b/drivers/char/ipmi/ipmi_dmi.c
index bbf7029e224b..cf7faa970dd6 100644
--- a/drivers/char/ipmi/ipmi_dmi.c
+++ b/drivers/char/ipmi/ipmi_dmi.c
@@ -215,6 +215,21 @@ static int __init scan_for_dmi_ipmi(void)
 {
 	const struct dmi_device *dev = NULL;

+#ifdef CONFIG_ARM64
+	/* RHEL-only
+	 * If this is ARM-based HPE m400, return now, because that platform
+	 * reports the host-side ipmi address as intel port-io space, which
+	 * does not exist in the ARM architecture.
+	 */
+	const char *dmistr = dmi_get_system_info(DMI_PRODUCT_NAME);
+
+	if (dmistr && (strcmp("ProLiant m400 Server", dmistr) == 0)) {
+		pr_debug("%s does not support host ipmi\n", dmistr);
+		return 0;
+	}
+	/* END RHEL-only */
+#endif
+
 	while ((dev = dmi_find_device(DMI_DEV_TYPE_IPMI, NULL, dev)))
 		dmi_decode_ipmi((const struct dmi_header *) dev->device_data);

diff --git a/drivers/char/ipmi/ipmi_msghandler.c b/drivers/char/ipmi/ipmi_msghandler.c
index a08f53f208bf..49942737cae0 100644
--- a/drivers/char/ipmi/ipmi_msghandler.c
+++ b/drivers/char/ipmi/ipmi_msghandler.c
@@ -35,6 +35,7 @@
 #include <linux/uuid.h>
 #include <linux/nospec.h>
 #include <linux/vmalloc.h>
+#include <linux/dmi.h>
 #include <linux/delay.h>

 #define IPMI_DRIVER_VERSION "39.2"
@@ -5164,8 +5165,21 @@ static int __init ipmi_init_msghandler_mod(void)
 {
 	int rv;

-	pr_info("version " IPMI_DRIVER_VERSION "\n");
+#ifdef CONFIG_ARM64
+	/* RHEL-only
+	 * If this is ARM-based HPE m400, return now, because that platform
+	 * reports the host-side ipmi address as intel port-io space, which
+	 * does not exist in the ARM architecture.
+	 */
+	const char *dmistr = dmi_get_system_info(DMI_PRODUCT_NAME);

+	if (dmistr && (strcmp("ProLiant m400 Server", dmistr) == 0)) {
+		pr_debug("%s does not support host ipmi\n", dmistr);
+		return -ENOSYS;
+	}
+	/* END RHEL-only */
+#endif
+	pr_info("version " IPMI_DRIVER_VERSION "\n");
 	mutex_lock(&ipmi_interfaces_mutex);
 	rv = ipmi_register_driver();
 	mutex_unlock(&ipmi_interfaces_mutex);
diff --git a/drivers/char/random.c b/drivers/char/random.c
index 605969ed0f96..4d51f1c67675 100644
--- a/drivers/char/random.c
+++ b/drivers/char/random.c
@@ -335,6 +335,7 @@
 #include <linux/syscalls.h>
 #include <linux/completion.h>
 #include <linux/uuid.h>
+#include <linux/rcupdate.h>
 #include <crypto/chacha.h>
 #include <crypto/sha1.h>

@@ -349,6 +350,11 @@

 /* #define ADD_INTERRUPT_BENCH */

+/*
+ * Hook for external RNG.
+ */
+static const struct random_extrng __rcu *extrng;
+
 /*
  * Configuration information
  */
@@ -481,6 +487,9 @@ static int ratelimit_disable __read_mostly;
 module_param_named(ratelimit_disable, ratelimit_disable, int, 0644);
 MODULE_PARM_DESC(ratelimit_disable, "Disable random ratelimit suppression");

+static const struct file_operations extrng_random_fops;
+static const struct file_operations extrng_urandom_fops;
+
 /**********************************************************************
  *
  * OS independent entropy store.   Here are the functions which handle
@@ -1858,6 +1867,13 @@ random_poll(struct file *file, poll_table * wait)
 	return mask;
 }

+static __poll_t
+extrng_poll(struct file *file, poll_table * wait)
+{
+	/* extrng pool is always full, always read, no writes */
+	return EPOLLIN | EPOLLRDNORM;
+}
+
 static int
 write_pool(struct entropy_store *r, const char __user *buffer, size_t count)
 {
@@ -1961,7 +1977,58 @@ static int random_fasync(int fd, struct file *filp, int on)
 	return fasync_helper(fd, filp, on, &fasync);
 }

+static int random_open(struct inode *inode, struct file *filp)
+{
+	const struct random_extrng *rng;
+
+	rcu_read_lock();
+	rng = rcu_dereference(extrng);
+	if (rng && !try_module_get(rng->owner))
+		rng = NULL;
+	rcu_read_unlock();
+
+	if (!rng)
+		return 0;
+
+	filp->f_op = &extrng_random_fops;
+	filp->private_data = rng->owner;
+
+	return 0;
+}
+
+static int urandom_open(struct inode *inode, struct file *filp)
+{
+	const struct random_extrng *rng;
+
+	rcu_read_lock();
+	rng = rcu_dereference(extrng);
+	if (rng && !try_module_get(rng->owner))
+		rng = NULL;
+	rcu_read_unlock();
+
+	if (!rng)
+		return 0;
+
+	filp->f_op = &extrng_urandom_fops;
+	filp->private_data = rng->owner;
+
+	return 0;
+}
+
+static int extrng_release(struct inode *inode, struct file *filp)
+{
+	module_put(filp->private_data);
+	return 0;
+}
+
+static ssize_t
+extrng_read(struct file *file, char __user *buf, size_t nbytes, loff_t *ppos)
+{
+	return rcu_dereference_raw(extrng)->extrng_read(buf, nbytes);
+}
+
 const struct file_operations random_fops = {
+	.open  = random_open,
 	.read  = random_read,
 	.write = random_write,
 	.poll  = random_poll,
@@ -1972,6 +2039,7 @@ const struct file_operations random_fops = {
 };

 const struct file_operations urandom_fops = {
+	.open  = urandom_open,
 	.read  = urandom_read,
 	.write = random_write,
 	.unlocked_ioctl = random_ioctl,
@@ -1980,9 +2048,31 @@ const struct file_operations urandom_fops = {
 	.llseek = noop_llseek,
 };

+static const struct file_operations extrng_random_fops = {
+	.open  = random_open,
+	.read  = extrng_read,
+	.write = random_write,
+	.poll  = extrng_poll,
+	.unlocked_ioctl = random_ioctl,
+	.fasync = random_fasync,
+	.llseek = noop_llseek,
+	.release = extrng_release,
+};
+
+static const struct file_operations extrng_urandom_fops = {
+	.open  = urandom_open,
+	.read  = extrng_read,
+	.write = random_write,
+	.unlocked_ioctl = random_ioctl,
+	.fasync = random_fasync,
+	.llseek = noop_llseek,
+	.release = extrng_release,
+};
+
 SYSCALL_DEFINE3(getrandom, char __user *, buf, size_t, count,
 		unsigned int, flags)
 {
+	const struct random_extrng *rng;
 	int ret;

 	if (flags & ~(GRND_NONBLOCK|GRND_RANDOM|GRND_INSECURE))
@@ -1998,6 +2088,18 @@ SYSCALL_DEFINE3(getrandom, char __user *, buf, size_t, count,
 	if (count > INT_MAX)
 		count = INT_MAX;

+	rcu_read_lock();
+	rng = rcu_dereference(extrng);
+	if (rng && !try_module_get(rng->owner))
+		rng = NULL;
+	rcu_read_unlock();
+
+	if (rng) {
+		ret = rng->extrng_read(buf, count);
+		module_put(rng->owner);
+		return ret;
+	}
+
 	if (!(flags & GRND_INSECURE) && !crng_ready()) {
 		if (flags & GRND_NONBLOCK)
 			return -EAGAIN;
@@ -2303,3 +2405,16 @@ void add_bootloader_randomness(const void *buf, unsigned int size)
 		add_device_randomness(buf, size);
 }
 EXPORT_SYMBOL_GPL(add_bootloader_randomness);
+
+void random_register_extrng(const struct random_extrng *rng)
+{
+	rcu_assign_pointer(extrng, rng);
+}
+EXPORT_SYMBOL_GPL(random_register_extrng);
+
+void random_unregister_extrng(void)
+{
+	RCU_INIT_POINTER(extrng, NULL);
+	synchronize_rcu();
+}
+EXPORT_SYMBOL_GPL(random_unregister_extrng);
diff --git a/drivers/firmware/efi/Makefile b/drivers/firmware/efi/Makefile
index c02ff25dd477..d860f8eb9a81 100644
--- a/drivers/firmware/efi/Makefile
+++ b/drivers/firmware/efi/Makefile
@@ -28,6 +28,7 @@ obj-$(CONFIG_EFI_FAKE_MEMMAP)		+= fake_map.o
 obj-$(CONFIG_EFI_BOOTLOADER_CONTROL)	+= efibc.o
 obj-$(CONFIG_EFI_TEST)			+= test/
 obj-$(CONFIG_EFI_DEV_PATH_PARSER)	+= dev-path-parser.o
+obj-$(CONFIG_EFI)			+= secureboot.o
 obj-$(CONFIG_APPLE_PROPERTIES)		+= apple-properties.o
 obj-$(CONFIG_EFI_RCI2_TABLE)		+= rci2-table.o
 obj-$(CONFIG_EFI_EMBEDDED_FIRMWARE)	+= embedded-firmware.o
diff --git a/drivers/firmware/efi/efi.c b/drivers/firmware/efi/efi.c
index 847f33ffc4ae..363037f8eaf8 100644
--- a/drivers/firmware/efi/efi.c
+++ b/drivers/firmware/efi/efi.c
@@ -31,6 +31,7 @@
 #include <linux/ucs2_string.h>
 #include <linux/memblock.h>
 #include <linux/security.h>
+#include <linux/bsearch.h>

 #include <asm/early_ioremap.h>

@@ -841,40 +842,101 @@ int efi_mem_type(unsigned long phys_addr)
 }
 #endif

+struct efi_error_code {
+	efi_status_t status;
+	int errno;
+	const char *description;
+};
+
+static const struct efi_error_code efi_error_codes[] = {
+	{ EFI_SUCCESS, 0, "Success"},
+#if 0
+	{ EFI_LOAD_ERROR, -EPICK_AN_ERRNO, "Load Error"},
+#endif
+	{ EFI_INVALID_PARAMETER, -EINVAL, "Invalid Parameter"},
+	{ EFI_UNSUPPORTED, -ENOSYS, "Unsupported"},
+	{ EFI_BAD_BUFFER_SIZE, -ENOSPC, "Bad Buffer Size"},
+	{ EFI_BUFFER_TOO_SMALL, -ENOSPC, "Buffer Too Small"},
+	{ EFI_NOT_READY, -EAGAIN, "Not Ready"},
+	{ EFI_DEVICE_ERROR, -EIO, "Device Error"},
+	{ EFI_WRITE_PROTECTED, -EROFS, "Write Protected"},
+	{ EFI_OUT_OF_RESOURCES, -ENOMEM, "Out of Resources"},
+#if 0
+	{ EFI_VOLUME_CORRUPTED, -EPICK_AN_ERRNO, "Volume Corrupt"},
+	{ EFI_VOLUME_FULL, -EPICK_AN_ERRNO, "Volume Full"},
+	{ EFI_NO_MEDIA, -EPICK_AN_ERRNO, "No Media"},
+	{ EFI_MEDIA_CHANGED, -EPICK_AN_ERRNO, "Media changed"},
+#endif
+	{ EFI_NOT_FOUND, -ENOENT, "Not Found"},
+#if 0
+	{ EFI_ACCESS_DENIED, -EPICK_AN_ERRNO, "Access Denied"},
+	{ EFI_NO_RESPONSE, -EPICK_AN_ERRNO, "No Response"},
+	{ EFI_NO_MAPPING, -EPICK_AN_ERRNO, "No mapping"},
+	{ EFI_TIMEOUT, -EPICK_AN_ERRNO, "Time out"},
+	{ EFI_NOT_STARTED, -EPICK_AN_ERRNO, "Not started"},
+	{ EFI_ALREADY_STARTED, -EPICK_AN_ERRNO, "Already started"},
+#endif
+	{ EFI_ABORTED, -EINTR, "Aborted"},
+#if 0
+	{ EFI_ICMP_ERROR, -EPICK_AN_ERRNO, "ICMP Error"},
+	{ EFI_TFTP_ERROR, -EPICK_AN_ERRNO, "TFTP Error"},
+	{ EFI_PROTOCOL_ERROR, -EPICK_AN_ERRNO, "Protocol Error"},
+	{ EFI_INCOMPATIBLE_VERSION, -EPICK_AN_ERRNO, "Incompatible Version"},
+#endif
+	{ EFI_SECURITY_VIOLATION, -EACCES, "Security Policy Violation"},
+#if 0
+	{ EFI_CRC_ERROR, -EPICK_AN_ERRNO, "CRC Error"},
+	{ EFI_END_OF_MEDIA, -EPICK_AN_ERRNO, "End of Media"},
+	{ EFI_END_OF_FILE, -EPICK_AN_ERRNO, "End of File"},
+	{ EFI_INVALID_LANGUAGE, -EPICK_AN_ERRNO, "Invalid Languages"},
+	{ EFI_COMPROMISED_DATA, -EPICK_AN_ERRNO, "Compromised Data"},
+
+	// warnings
+	{ EFI_WARN_UNKOWN_GLYPH, -EPICK_AN_ERRNO, "Warning Unknown Glyph"},
+	{ EFI_WARN_DELETE_FAILURE, -EPICK_AN_ERRNO, "Warning Delete Failure"},
+	{ EFI_WARN_WRITE_FAILURE, -EPICK_AN_ERRNO, "Warning Write Failure"},
+	{ EFI_WARN_BUFFER_TOO_SMALL, -EPICK_AN_ERRNO, "Warning Buffer Too Small"},
+#endif
+};
+
+static int
+efi_status_cmp_bsearch(const void *key, const void *item)
+{
+	u64 status = (u64)(uintptr_t)key;
+	struct efi_error_code *code = (struct efi_error_code *)item;
+
+	if (status < code->status)
+		return -1;
+	if (status > code->status)
+		return 1;
+	return 0;
+}
+
 int efi_status_to_err(efi_status_t status)
 {
-	int err;
-
-	switch (status) {
-	case EFI_SUCCESS:
-		err = 0;
-		break;
-	case EFI_INVALID_PARAMETER:
-		err = -EINVAL;
-		break;
-	case EFI_OUT_OF_RESOURCES:
-		err = -ENOSPC;
-		break;
-	case EFI_DEVICE_ERROR:
-		err = -EIO;
-		break;
-	case EFI_WRITE_PROTECTED:
-		err = -EROFS;
-		break;
-	case EFI_SECURITY_VIOLATION:
-		err = -EACCES;
-		break;
-	case EFI_NOT_FOUND:
-		err = -ENOENT;
-		break;
-	case EFI_ABORTED:
-		err = -EINTR;
-		break;
-	default:
-		err = -EINVAL;
-	}
+	struct efi_error_code *found;
+	size_t num = sizeof(efi_error_codes) / sizeof(struct efi_error_code);

-	return err;
+	found = bsearch((void *)(uintptr_t)status, efi_error_codes,
+			sizeof(struct efi_error_code), num,
+			efi_status_cmp_bsearch);
+	if (!found)
+		return -EINVAL;
+	return found->errno;
+}
+
+const char *
+efi_status_to_str(efi_status_t status)
+{
+	struct efi_error_code *found;
+	size_t num = sizeof(efi_error_codes) / sizeof(struct efi_error_code);
+
+	found = bsearch((void *)(uintptr_t)status, efi_error_codes,
+			sizeof(struct efi_error_code), num,
+			efi_status_cmp_bsearch);
+	if (!found)
+		return "Unknown error code";
+	return found->description;
 }

 static DEFINE_SPINLOCK(efi_mem_reserve_persistent_lock);
diff --git a/drivers/firmware/efi/secureboot.c b/drivers/firmware/efi/secureboot.c
new file mode 100644
index 000000000000..de0a3714a5d4
--- /dev/null
+++ b/drivers/firmware/efi/secureboot.c
@@ -0,0 +1,38 @@
+/* Core kernel secure boot support.
+ *
+ * Copyright (C) 2017 Red Hat, Inc. All Rights Reserved.
+ * Written by David Howells (dhowells@redhat.com)
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public Licence
+ * as published by the Free Software Foundation; either version
+ * 2 of the Licence, or (at your option) any later version.
+ */
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#include <linux/efi.h>
+#include <linux/kernel.h>
+#include <linux/printk.h>
+
+/*
+ * Decide what to do when UEFI secure boot mode is enabled.
+ */
+void __init efi_set_secure_boot(enum efi_secureboot_mode mode)
+{
+	if (efi_enabled(EFI_BOOT)) {
+		switch (mode) {
+		case efi_secureboot_mode_disabled:
+			pr_info("Secure boot disabled\n");
+			break;
+		case efi_secureboot_mode_enabled:
+			set_bit(EFI_SECURE_BOOT, &efi.flags);
+			pr_info("Secure boot enabled\n");
+			break;
+		default:
+			pr_warn("Secure boot could not be determined (mode %u)\n",
+				   mode);
+			break;
+		}
+	}
+}
diff --git a/drivers/hid/hid-rmi.c b/drivers/hid/hid-rmi.c
index 311eee599ce9..2460c6bd46f8 100644
--- a/drivers/hid/hid-rmi.c
+++ b/drivers/hid/hid-rmi.c
@@ -322,19 +322,12 @@ static int rmi_input_event(struct hid_device *hdev, u8 *data, int size)
 {
 	struct rmi_data *hdata = hid_get_drvdata(hdev);
 	struct rmi_device *rmi_dev = hdata->xport.rmi_dev;
-	unsigned long flags;

 	if (!(test_bit(RMI_STARTED, &hdata->flags)))
 		return 0;

-	local_irq_save(flags);
-
 	rmi_set_attn_data(rmi_dev, data[1], &data[2], size - 2);

-	generic_handle_irq(hdata->rmi_irq);
-
-	local_irq_restore(flags);
-
 	return 1;
 }

@@ -591,56 +584,6 @@ static const struct rmi_transport_ops hid_rmi_ops = {
 	.reset		= rmi_hid_reset,
 };

-static void rmi_irq_teardown(void *data)
-{
-	struct rmi_data *hdata = data;
-	struct irq_domain *domain = hdata->domain;
-
-	if (!domain)
-		return;
-
-	irq_dispose_mapping(irq_find_mapping(domain, 0));
-
-	irq_domain_remove(domain);
-	hdata->domain = NULL;
-	hdata->rmi_irq = 0;
-}
-
-static int rmi_irq_map(struct irq_domain *h, unsigned int virq,
-		       irq_hw_number_t hw_irq_num)
-{
-	irq_set_chip_and_handler(virq, &dummy_irq_chip, handle_simple_irq);
-
-	return 0;
-}
-
-static const struct irq_domain_ops rmi_irq_ops = {
-	.map = rmi_irq_map,
-};
-
-static int rmi_setup_irq_domain(struct hid_device *hdev)
-{
-	struct rmi_data *hdata = hid_get_drvdata(hdev);
-	int ret;
-
-	hdata->domain = irq_domain_create_linear(hdev->dev.fwnode, 1,
-						 &rmi_irq_ops, hdata);
-	if (!hdata->domain)
-		return -ENOMEM;
-
-	ret = devm_add_action_or_reset(&hdev->dev, &rmi_irq_teardown, hdata);
-	if (ret)
-		return ret;
-
-	hdata->rmi_irq = irq_create_mapping(hdata->domain, 0);
-	if (hdata->rmi_irq <= 0) {
-		hid_err(hdev, "Can't allocate an IRQ\n");
-		return hdata->rmi_irq < 0 ? hdata->rmi_irq : -ENXIO;
-	}
-
-	return 0;
-}
-
 static int rmi_probe(struct hid_device *hdev, const struct hid_device_id *id)
 {
 	struct rmi_data *data = NULL;
@@ -713,18 +656,11 @@ static int rmi_probe(struct hid_device *hdev, const struct hid_device_id *id)

 	mutex_init(&data->page_mutex);

-	ret = rmi_setup_irq_domain(hdev);
-	if (ret) {
-		hid_err(hdev, "failed to allocate IRQ domain\n");
-		return ret;
-	}
-
 	if (data->device_flags & RMI_DEVICE_HAS_PHYS_BUTTONS)
 		rmi_hid_pdata.gpio_data.disable = true;

 	data->xport.dev = hdev->dev.parent;
 	data->xport.pdata = rmi_hid_pdata;
-	data->xport.pdata.irq = data->rmi_irq;
 	data->xport.proto_name = "hid";
 	data->xport.ops = &hid_rmi_ops;

diff --git a/drivers/hwtracing/coresight/coresight-etm4x-core.c b/drivers/hwtracing/coresight/coresight-etm4x-core.c
index e24252eaf8e4..368d64adeee8 100644
--- a/drivers/hwtracing/coresight/coresight-etm4x-core.c
+++ b/drivers/hwtracing/coresight/coresight-etm4x-core.c
@@ -9,6 +9,7 @@
 #include <linux/init.h>
 #include <linux/types.h>
 #include <linux/device.h>
+#include <linux/dmi.h>
 #include <linux/io.h>
 #include <linux/err.h>
 #include <linux/fs.h>
@@ -2105,6 +2106,16 @@ static const struct amba_id etm4_ids[] = {
 	{},
 };

+static const struct dmi_system_id broken_coresight[] = {
+	{
+		.matches = {
+			DMI_MATCH(DMI_SYS_VENDOR, "HPE"),
+			DMI_MATCH(DMI_PRODUCT_NAME, "Apollo 70"),
+		},
+	},
+	{ }	/* terminating entry */
+};
+
 MODULE_DEVICE_TABLE(amba, etm4_ids);

 static struct amba_driver etm4x_amba_driver = {
@@ -2138,6 +2149,11 @@ static int __init etm4x_init(void)
 {
 	int ret;

+	if (dmi_check_system(broken_coresight)) {
+		pr_info("ETM4 disabled due to firmware bug\n");
+		return 0;
+	}
+
 	ret = etm4_pm_setup();

 	/* etm4_pm_setup() does its own cleanup - exit on error */
@@ -2164,6 +2180,9 @@ static int __init etm4x_init(void)

 static void __exit etm4x_exit(void)
 {
+	if (dmi_check_system(broken_coresight))
+		return;
+
 	amba_driver_unregister(&etm4x_amba_driver);
 	platform_driver_unregister(&etm4_platform_driver);
 	etm4_pm_clear();
diff --git a/drivers/input/rmi4/rmi_driver.c b/drivers/input/rmi4/rmi_driver.c
index 258d5fe3d395..f7298e3dc8f3 100644
--- a/drivers/input/rmi4/rmi_driver.c
+++ b/drivers/input/rmi4/rmi_driver.c
@@ -182,34 +182,47 @@ void rmi_set_attn_data(struct rmi_device *rmi_dev, unsigned long irq_status,
 	attn_data.data = fifo_data;

 	kfifo_put(&drvdata->attn_fifo, attn_data);
+
+	schedule_work(&drvdata->attn_work);
 }
 EXPORT_SYMBOL_GPL(rmi_set_attn_data);

-static irqreturn_t rmi_irq_fn(int irq, void *dev_id)
+static void attn_callback(struct work_struct *work)
 {
-	struct rmi_device *rmi_dev = dev_id;
-	struct rmi_driver_data *drvdata = dev_get_drvdata(&rmi_dev->dev);
+	struct rmi_driver_data *drvdata = container_of(work,
+							struct rmi_driver_data,
+							attn_work);
 	struct rmi4_attn_data attn_data = {0};
 	int ret, count;

 	count = kfifo_get(&drvdata->attn_fifo, &attn_data);
-	if (count) {
-		*(drvdata->irq_status) = attn_data.irq_status;
-		drvdata->attn_data = attn_data;
-	}
+	if (!count)
+		return;

-	ret = rmi_process_interrupt_requests(rmi_dev);
+	*(drvdata->irq_status) = attn_data.irq_status;
+	drvdata->attn_data = attn_data;
+
+	ret = rmi_process_interrupt_requests(drvdata->rmi_dev);
 	if (ret)
-		rmi_dbg(RMI_DEBUG_CORE, &rmi_dev->dev,
+		rmi_dbg(RMI_DEBUG_CORE, &drvdata->rmi_dev->dev,
 			"Failed to process interrupt request: %d\n", ret);

-	if (count) {
-		kfree(attn_data.data);
-		drvdata->attn_data.data = NULL;
-	}
+	kfree(attn_data.data);
+	drvdata->attn_data.data = NULL;

 	if (!kfifo_is_empty(&drvdata->attn_fifo))
-		return rmi_irq_fn(irq, dev_id);
+		schedule_work(&drvdata->attn_work);
+}
+
+static irqreturn_t rmi_irq_fn(int irq, void *dev_id)
+{
+	struct rmi_device *rmi_dev = dev_id;
+	int ret;
+
+	ret = rmi_process_interrupt_requests(rmi_dev);
+	if (ret)
+		rmi_dbg(RMI_DEBUG_CORE, &rmi_dev->dev,
+			"Failed to process interrupt request: %d\n", ret);

 	return IRQ_HANDLED;
 }
@@ -217,7 +230,6 @@ static irqreturn_t rmi_irq_fn(int irq, void *dev_id)
 static int rmi_irq_init(struct rmi_device *rmi_dev)
 {
 	struct rmi_device_platform_data *pdata = rmi_get_platform_data(rmi_dev);
-	struct rmi_driver_data *data = dev_get_drvdata(&rmi_dev->dev);
 	int irq_flags = irq_get_trigger_type(pdata->irq);
 	int ret;

@@ -235,8 +247,6 @@ static int rmi_irq_init(struct rmi_device *rmi_dev)
 		return ret;
 	}

-	data->enabled = true;
-
 	return 0;
 }

@@ -886,23 +896,27 @@ void rmi_enable_irq(struct rmi_device *rmi_dev, bool clear_wake)
 	if (data->enabled)
 		goto out;

-	enable_irq(irq);
-	data->enabled = true;
-	if (clear_wake && device_may_wakeup(rmi_dev->xport->dev)) {
-		retval = disable_irq_wake(irq);
-		if (retval)
-			dev_warn(&rmi_dev->dev,
-				 "Failed to disable irq for wake: %d\n",
-				 retval);
-	}
+	if (irq) {
+		enable_irq(irq);
+		data->enabled = true;
+		if (clear_wake && device_may_wakeup(rmi_dev->xport->dev)) {
+			retval = disable_irq_wake(irq);
+			if (retval)
+				dev_warn(&rmi_dev->dev,
+					 "Failed to disable irq for wake: %d\n",
+					 retval);
+		}

-	/*
-	 * Call rmi_process_interrupt_requests() after enabling irq,
-	 * otherwise we may lose interrupt on edge-triggered systems.
-	 */
-	irq_flags = irq_get_trigger_type(pdata->irq);
-	if (irq_flags & IRQ_TYPE_EDGE_BOTH)
-		rmi_process_interrupt_requests(rmi_dev);
+		/*
+		 * Call rmi_process_interrupt_requests() after enabling irq,
+		 * otherwise we may lose interrupt on edge-triggered systems.
+		 */
+		irq_flags = irq_get_trigger_type(pdata->irq);
+		if (irq_flags & IRQ_TYPE_EDGE_BOTH)
+			rmi_process_interrupt_requests(rmi_dev);
+	} else {
+		data->enabled = true;
+	}

 out:
 	mutex_unlock(&data->enabled_mutex);
@@ -922,20 +936,22 @@ void rmi_disable_irq(struct rmi_device *rmi_dev, bool enable_wake)
 		goto out;

 	data->enabled = false;
-	disable_irq(irq);
-	if (enable_wake && device_may_wakeup(rmi_dev->xport->dev)) {
-		retval = enable_irq_wake(irq);
-		if (retval)
-			dev_warn(&rmi_dev->dev,
-				 "Failed to enable irq for wake: %d\n",
-				 retval);
-	}
-
-	/* make sure the fifo is clean */
-	while (!kfifo_is_empty(&data->attn_fifo)) {
-		count = kfifo_get(&data->attn_fifo, &attn_data);
-		if (count)
-			kfree(attn_data.data);
+	if (irq) {
+		disable_irq(irq);
+		if (enable_wake && device_may_wakeup(rmi_dev->xport->dev)) {
+			retval = enable_irq_wake(irq);
+			if (retval)
+				dev_warn(&rmi_dev->dev,
+					 "Failed to enable irq for wake: %d\n",
+					 retval);
+		}
+	} else {
+		/* make sure the fifo is clean */
+		while (!kfifo_is_empty(&data->attn_fifo)) {
+			count = kfifo_get(&data->attn_fifo, &attn_data);
+			if (count)
+				kfree(attn_data.data);
+		}
 	}

 out:
@@ -981,6 +997,8 @@ static int rmi_driver_remove(struct device *dev)
 	irq_domain_remove(data->irqdomain);
 	data->irqdomain = NULL;

+	cancel_work_sync(&data->attn_work);
+
 	rmi_f34_remove_sysfs(rmi_dev);
 	rmi_free_function_list(rmi_dev);

@@ -1219,9 +1237,15 @@ static int rmi_driver_probe(struct device *dev)
 		}
 	}

-	retval = rmi_irq_init(rmi_dev);
-	if (retval < 0)
-		goto err_destroy_functions;
+	if (pdata->irq) {
+		retval = rmi_irq_init(rmi_dev);
+		if (retval < 0)
+			goto err_destroy_functions;
+	}
+
+	data->enabled = true;
+
+	INIT_WORK(&data->attn_work, attn_callback);

 	if (data->f01_container->dev.driver) {
 		/* Driver already bound, so enable ATTN now. */
diff --git a/drivers/iommu/iommu.c b/drivers/iommu/iommu.c
index 3303d707bab4..372edaaafaa1 100644
--- a/drivers/iommu/iommu.c
+++ b/drivers/iommu/iommu.c
@@ -7,6 +7,7 @@
 #define pr_fmt(fmt)    "iommu: " fmt

 #include <linux/device.h>
+#include <linux/dmi.h>
 #include <linux/dma-iommu.h>
 #include <linux/kernel.h>
 #include <linux/bits.h>
@@ -3118,6 +3119,27 @@ u32 iommu_sva_get_pasid(struct iommu_sva *handle)
 }
 EXPORT_SYMBOL_GPL(iommu_sva_get_pasid);

+#ifdef CONFIG_ARM64
+static int __init iommu_quirks(void)
+{
+	const char *vendor, *name;
+
+	vendor = dmi_get_system_info(DMI_SYS_VENDOR);
+	name = dmi_get_system_info(DMI_PRODUCT_NAME);
+
+	if (vendor &&
+	    (strncmp(vendor, "GIGABYTE", 8) == 0 && name &&
+	     (strncmp(name, "R120", 4) == 0 ||
+	      strncmp(name, "R270", 4) == 0))) {
+		pr_warn("Gigabyte %s detected, force iommu passthrough mode", name);
+		iommu_def_domain_type = IOMMU_DOMAIN_IDENTITY;
+	}
+
+	return 0;
+}
+arch_initcall(iommu_quirks);
+#endif
+
 /*
  * Changes the default domain of an iommu group that has *only* one device
  *
diff --git a/drivers/net/ethernet/aquantia/atlantic/hw_atl/hw_atl_utils.c b/drivers/net/ethernet/aquantia/atlantic/hw_atl/hw_atl_utils.c
index 404cbf60d3f2..da1d185f6d22 100644
--- a/drivers/net/ethernet/aquantia/atlantic/hw_atl/hw_atl_utils.c
+++ b/drivers/net/ethernet/aquantia/atlantic/hw_atl/hw_atl_utils.c
@@ -559,6 +559,11 @@ int hw_atl_utils_fw_rpc_wait(struct aq_hw_s *self,
 			goto err_exit;

 		if (fw.len == 0xFFFFU) {
+			if (sw.len > sizeof(self->rpc)) {
+				printk(KERN_INFO "Invalid sw len: %x\n", sw.len);
+				err = -EINVAL;
+				goto err_exit;
+			}
 			err = hw_atl_utils_fw_rpc_call(self, sw.len);
 			if (err < 0)
 				goto err_exit;
@@ -567,6 +572,11 @@ int hw_atl_utils_fw_rpc_wait(struct aq_hw_s *self,

 	if (rpc) {
 		if (fw.len) {
+			if (fw.len > sizeof(self->rpc)) {
+				printk(KERN_INFO "Invalid fw len: %x\n", fw.len);
+				err = -EINVAL;
+				goto err_exit;
+			}
 			err =
 			hw_atl_utils_fw_downld_dwords(self,
 						      self->rpc_addr,
diff --git a/drivers/net/wireless/marvell/mwifiex/usb.c b/drivers/net/wireless/marvell/mwifiex/usb.c
index 9736aa0ab7fd..8f01fcbe9396 100644
--- a/drivers/net/wireless/marvell/mwifiex/usb.c
+++ b/drivers/net/wireless/marvell/mwifiex/usb.c
@@ -130,7 +130,8 @@ static int mwifiex_usb_recv(struct mwifiex_adapter *adapter,
 		default:
 			mwifiex_dbg(adapter, ERROR,
 				    "unknown recv_type %#x\n", recv_type);
-			return -1;
+			ret = -1;
+			goto exit_restore_skb;
 		}
 		break;
 	case MWIFIEX_USB_EP_DATA:
diff --git a/drivers/nvme/host/core.c b/drivers/nvme/host/core.c
index f8dd664b2eda..0ff9ea8340e4 100644
--- a/drivers/nvme/host/core.c
+++ b/drivers/nvme/host/core.c
@@ -262,6 +262,9 @@ static void nvme_delete_ctrl_sync(struct nvme_ctrl *ctrl)

 static blk_status_t nvme_error_status(u16 status)
 {
+	if (unlikely(status & NVME_SC_DNR))
+		return BLK_STS_TARGET;
+
 	switch (status & 0x7ff) {
 	case NVME_SC_SUCCESS:
 		return BLK_STS_OK;
@@ -321,6 +324,7 @@ enum nvme_disposition {
 	COMPLETE,
 	RETRY,
 	FAILOVER,
+	FAILUP,
 };

 static inline enum nvme_disposition nvme_decide_disposition(struct request *req)
@@ -328,15 +332,16 @@ static inline enum nvme_disposition nvme_decide_disposition(struct request *req)
 	if (likely(nvme_req(req)->status == 0))
 		return COMPLETE;

-	if (blk_noretry_request(req) ||
+	if ((req->cmd_flags & (REQ_FAILFAST_DEV | REQ_FAILFAST_DRIVER)) ||
 	    (nvme_req(req)->status & NVME_SC_DNR) ||
 	    nvme_req(req)->retries >= nvme_max_retries)
 		return COMPLETE;

-	if (req->cmd_flags & REQ_NVME_MPATH) {
+	if (req->cmd_flags & (REQ_NVME_MPATH | REQ_FAILFAST_TRANSPORT)) {
 		if (nvme_is_path_error(nvme_req(req)->status) ||
 		    blk_queue_dying(req->q))
-			return FAILOVER;
+			return (req->cmd_flags & REQ_NVME_MPATH) ?
+				FAILOVER : FAILUP;
 	} else {
 		if (blk_queue_dying(req->q))
 			return COMPLETE;
@@ -358,6 +363,14 @@ static inline void nvme_end_req(struct request *req)
 	blk_mq_end_request(req, status);
 }

+static inline void nvme_failup_req(struct request *req)
+{
+	nvme_update_ana(req);
+
+	nvme_req(req)->status = NVME_SC_HOST_PATH_ERROR;
+	nvme_end_req(req);
+}
+
 void nvme_complete_rq(struct request *req)
 {
 	trace_nvme_complete_rq(req);
@@ -376,6 +389,9 @@ void nvme_complete_rq(struct request *req)
 	case FAILOVER:
 		nvme_failover_req(req);
 		return;
+	case FAILUP:
+		nvme_failup_req(req);
+		return;
 	}
 }
 EXPORT_SYMBOL_GPL(nvme_complete_rq);
diff --git a/drivers/nvme/host/multipath.c b/drivers/nvme/host/multipath.c
index 2f76969408b2..021a4176b321 100644
--- a/drivers/nvme/host/multipath.c
+++ b/drivers/nvme/host/multipath.c
@@ -65,14 +65,10 @@ bool nvme_mpath_set_disk_name(struct nvme_ns *ns, char *disk_name, int *flags)
 	return true;
 }

-void nvme_failover_req(struct request *req)
+void nvme_update_ana(struct request *req)
 {
 	struct nvme_ns *ns = req->q->queuedata;
 	u16 status = nvme_req(req)->status & 0x7ff;
-	unsigned long flags;
-	struct bio *bio;
-
-	nvme_mpath_clear_current_path(ns);

 	/*
 	 * If we got back an ANA error, we know the controller is alive but not
@@ -83,6 +79,16 @@ void nvme_failover_req(struct request *req)
 		set_bit(NVME_NS_ANA_PENDING, &ns->flags);
 		queue_work(nvme_wq, &ns->ctrl->ana_work);
 	}
+}
+
+void nvme_failover_req(struct request *req)
+{
+	struct nvme_ns *ns = req->q->queuedata;
+	unsigned long flags;
+	struct bio *bio;
+
+	nvme_mpath_clear_current_path(ns);
+	nvme_update_ana(req);

 	spin_lock_irqsave(&ns->head->requeue_lock, flags);
 	for (bio = req->bio; bio; bio = bio->bi_next)
@@ -813,8 +819,7 @@ int nvme_mpath_init_identify(struct nvme_ctrl *ctrl, struct nvme_id_ctrl *id)
 	int error = 0;

 	/* check if multipath is enabled and we have the capability */
-	if (!multipath || !ctrl->subsys ||
-	    !(ctrl->subsys->cmic & NVME_CTRL_CMIC_ANA))
+	if (!ctrl->subsys || !(ctrl->subsys->cmic & NVME_CTRL_CMIC_ANA))
 		return 0;

 	if (!ctrl->max_namespaces ||
diff --git a/drivers/nvme/host/nvme.h b/drivers/nvme/host/nvme.h
index ed79a6c7e804..961dc67d7261 100644
--- a/drivers/nvme/host/nvme.h
+++ b/drivers/nvme/host/nvme.h
@@ -746,6 +746,7 @@ void nvme_mpath_wait_freeze(struct nvme_subsystem *subsys);
 void nvme_mpath_start_freeze(struct nvme_subsystem *subsys);
 bool nvme_mpath_set_disk_name(struct nvme_ns *ns, char *disk_name, int *flags);
 void nvme_failover_req(struct request *req);
+void nvme_update_ana(struct request *req);
 void nvme_kick_requeue_lists(struct nvme_ctrl *ctrl);
 int nvme_mpath_alloc_disk(struct nvme_ctrl *ctrl,struct nvme_ns_head *head);
 void nvme_mpath_add_disk(struct nvme_ns *ns, struct nvme_id_ns *id);
@@ -784,6 +785,9 @@ static inline bool nvme_mpath_set_disk_name(struct nvme_ns *ns, char *disk_name,
 static inline void nvme_failover_req(struct request *req)
 {
 }
+static inline void nvme_update_ana(struct request *req)
+{
+}
 static inline void nvme_kick_requeue_lists(struct nvme_ctrl *ctrl)
 {
 }
diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c
index 208fa03acdda..88cfaa8ac3b3 100644
--- a/drivers/pci/quirks.c
+++ b/drivers/pci/quirks.c
@@ -4269,6 +4269,30 @@ DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_BROADCOM, 0x9000,
 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_BROADCOM, 0x9084,
 				quirk_bridge_cavm_thrx2_pcie_root);

+/*
+ * PCI BAR 5 is not setup correctly for the on-board AHCI controller
+ * on Broadcom's Vulcan processor. Added a quirk to fix BAR 5 by
+ * using BAR 4's resources which are populated correctly and NOT
+ * actually used by the AHCI controller.
+ */
+static void quirk_fix_vulcan_ahci_bars(struct pci_dev *dev)
+{
+	struct resource *r =  &dev->resource[4];
+
+	if (!(r->flags & IORESOURCE_MEM) || (r->start == 0))
+		return;
+
+	/* Set BAR5 resource to BAR4 */
+	dev->resource[5] = *r;
+
+	/* Update BAR5 in pci config space */
+	pci_write_config_dword(dev, PCI_BASE_ADDRESS_5, r->start);
+
+	/* Clear BAR4's resource */
+	memset(r, 0, sizeof(*r));
+}
+DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_BROADCOM, 0x9027, quirk_fix_vulcan_ahci_bars);
+
 /*
  * Intersil/Techwell TW686[4589]-based video capture cards have an empty (zero)
  * class code.  Fix it.
diff --git a/drivers/usb/core/hub.c b/drivers/usb/core/hub.c
index 86658a81d284..5647f4756e97 100644
--- a/drivers/usb/core/hub.c
+++ b/drivers/usb/core/hub.c
@@ -5657,6 +5657,13 @@ static void hub_event(struct work_struct *work)
 			(u16) hub->change_bits[0],
 			(u16) hub->event_bits[0]);

+	/* Don't disconnect USB-SATA on TrimSlice */
+	if (strcmp(dev_name(hdev->bus->controller), "tegra-ehci.0") == 0) {
+		if ((hdev->state == 7) && (hub->change_bits[0] == 0) &&
+				(hub->event_bits[0] == 0x2))
+			hub->event_bits[0] = 0;
+	}
+
 	/* Lock the device, then check to see if we were
 	 * disconnected while waiting for the lock to succeed. */
 	usb_lock_device(hdev);
diff --git a/drivers/usb/host/xhci-tegra.c b/drivers/usb/host/xhci-tegra.c
index 1bf494b649bd..c8af2cd2216d 100644
--- a/drivers/usb/host/xhci-tegra.c
+++ b/drivers/usb/host/xhci-tegra.c
@@ -1400,6 +1400,7 @@ static void tegra_xusb_deinit_usb_phy(struct tegra_xusb *tegra)

 static int tegra_xusb_probe(struct platform_device *pdev)
 {
+	struct of_phandle_args args;
 	struct tegra_xusb *tegra;
 	struct device_node *np;
 	struct resource *regs;
@@ -1454,10 +1455,17 @@ static int tegra_xusb_probe(struct platform_device *pdev)
 		goto put_padctl;
 	}

-	tegra->padctl_irq = of_irq_get(np, 0);
-	if (tegra->padctl_irq <= 0) {
-		err = (tegra->padctl_irq == 0) ? -ENODEV : tegra->padctl_irq;
-		goto put_padctl;
+	/* Older device-trees don't have padctrl interrupt */
+	err = of_irq_parse_one(np, 0, &args);
+	if (!err) {
+		tegra->padctl_irq = of_irq_get(np, 0);
+		if (tegra->padctl_irq <= 0) {
+			err = (tegra->padctl_irq == 0) ? -ENODEV : tegra->padctl_irq;
+			goto put_padctl;
+		}
+	} else {
+		dev_dbg(&pdev->dev,
+			"%pOF is missing an interrupt, disabling PM support\n", np);
 	}

 	tegra->host_clk = devm_clk_get(&pdev->dev, "xusb_host");
@@ -1696,11 +1704,15 @@ static int tegra_xusb_probe(struct platform_device *pdev)
 		goto remove_usb3;
 	}

-	err = devm_request_threaded_irq(&pdev->dev, tegra->padctl_irq, NULL, tegra_xusb_padctl_irq,
-					IRQF_ONESHOT, dev_name(&pdev->dev), tegra);
-	if (err < 0) {
-		dev_err(&pdev->dev, "failed to request padctl IRQ: %d\n", err);
-		goto remove_usb3;
+	if (tegra->padctl_irq) {
+		err = devm_request_threaded_irq(&pdev->dev, tegra->padctl_irq,
+						NULL, tegra_xusb_padctl_irq,
+						IRQF_ONESHOT, dev_name(&pdev->dev),
+						tegra);
+		if (err < 0) {
+			dev_err(&pdev->dev, "failed to request padctl IRQ: %d\n", err);
+			goto remove_usb3;
+		}
 	}

 	err = tegra_xusb_enable_firmware_messages(tegra);
@@ -1718,13 +1730,16 @@ static int tegra_xusb_probe(struct platform_device *pdev)
 	/* Enable wake for both USB 2.0 and USB 3.0 roothubs */
 	device_init_wakeup(&tegra->hcd->self.root_hub->dev, true);
 	device_init_wakeup(&xhci->shared_hcd->self.root_hub->dev, true);
-	device_init_wakeup(tegra->dev, true);

 	pm_runtime_use_autosuspend(tegra->dev);
 	pm_runtime_set_autosuspend_delay(tegra->dev, 2000);
 	pm_runtime_mark_last_busy(tegra->dev);
 	pm_runtime_set_active(tegra->dev);
-	pm_runtime_enable(tegra->dev);
+
+	if (tegra->padctl_irq) {
+		device_init_wakeup(tegra->dev, true);
+		pm_runtime_enable(tegra->dev);
+	}

 	return 0;

@@ -1772,7 +1787,9 @@ static int tegra_xusb_remove(struct platform_device *pdev)
 	dma_free_coherent(&pdev->dev, tegra->fw.size, tegra->fw.virt,
 			  tegra->fw.phys);

-	pm_runtime_disable(&pdev->dev);
+	if (tegra->padctl_irq)
+		pm_runtime_disable(&pdev->dev);
+
 	pm_runtime_put(&pdev->dev);

 	tegra_xusb_powergate_partitions(tegra);
diff --git a/fs/btrfs/async-thread.c b/fs/btrfs/async-thread.c
index 309516e6a968..d39af03b456c 100644
--- a/fs/btrfs/async-thread.c
+++ b/fs/btrfs/async-thread.c
@@ -234,6 +234,13 @@ static void run_ordered_work(struct __btrfs_workqueue *wq,
 				  ordered_list);
 		if (!test_bit(WORK_DONE_BIT, &work->flags))
 			break;
+		/*
+		 * Orders all subsequent loads after reading WORK_DONE_BIT,
+		 * paired with the smp_mb__before_atomic in btrfs_work_helper
+		 * this guarantees that the ordered function will see all
+		 * updates from ordinary work function.
+		 */
+		smp_rmb();

 		/*
 		 * we are going to call the ordered done function, but
@@ -317,6 +324,13 @@ static void btrfs_work_helper(struct work_struct *normal_work)
 	thresh_exec_hook(wq);
 	work->func(work);
 	if (need_order) {
+		/*
+		 * Ensures all memory accesses done in the work function are
+		 * ordered before setting the WORK_DONE_BIT.Ensuring the thread
+		 * which is going to executed the ordered work sees them.
+		 * Pairs with the smp_rmb in run_ordered_work.
+		 */
+		smp_mb__before_atomic();
 		set_bit(WORK_DONE_BIT, &work->flags);
 		run_ordered_work(wq, work);
 	} else {
diff --git a/include/linux/efi.h b/include/linux/efi.h
index 6b5d36babfcc..fd4a5d66a9d0 100644
--- a/include/linux/efi.h
+++ b/include/linux/efi.h
@@ -43,6 +43,8 @@
 #define EFI_ABORTED		(21 | (1UL << (BITS_PER_LONG-1)))
 #define EFI_SECURITY_VIOLATION	(26 | (1UL << (BITS_PER_LONG-1)))

+#define EFI_IS_ERROR(x)		((x) & (1UL << (BITS_PER_LONG-1)))
+
 typedef unsigned long efi_status_t;
 typedef u8 efi_bool_t;
 typedef u16 efi_char16_t;		/* UNICODE character */
@@ -782,6 +784,14 @@ extern int __init efi_setup_pcdp_console(char *);
 #define EFI_MEM_ATTR		10	/* Did firmware publish an EFI_MEMORY_ATTRIBUTES table? */
 #define EFI_MEM_NO_SOFT_RESERVE	11	/* Is the kernel configured to ignore soft reservations? */
 #define EFI_PRESERVE_BS_REGIONS	12	/* Are EFI boot-services memory segments available? */
+#define EFI_SECURE_BOOT		13	/* Are we in Secure Boot mode? */
+
+enum efi_secureboot_mode {
+	efi_secureboot_mode_unset,
+	efi_secureboot_mode_unknown,
+	efi_secureboot_mode_disabled,
+	efi_secureboot_mode_enabled,
+};

 #ifdef CONFIG_EFI
 /*
@@ -793,6 +803,8 @@ static inline bool efi_enabled(int feature)
 }
 extern void efi_reboot(enum reboot_mode reboot_mode, const char *__unused);

+extern void __init efi_set_secure_boot(enum efi_secureboot_mode mode);
+
 bool __pure __efi_soft_reserve_enabled(void);

 static inline bool __pure efi_soft_reserve_enabled(void)
@@ -813,6 +825,8 @@ static inline bool efi_enabled(int feature)
 static inline void
 efi_reboot(enum reboot_mode reboot_mode, const char *__unused) {}

+static inline void efi_set_secure_boot(enum efi_secureboot_mode mode) {}
+
 static inline bool efi_soft_reserve_enabled(void)
 {
 	return false;
@@ -825,6 +839,7 @@ static inline bool efi_rt_services_supported(unsigned int mask)
 #endif

 extern int efi_status_to_err(efi_status_t status);
+extern const char *efi_status_to_str(efi_status_t status);

 /*
  * Variable Attributes
@@ -1077,13 +1092,6 @@ static inline bool efi_runtime_disabled(void) { return true; }
 extern void efi_call_virt_check_flags(unsigned long flags, const char *call);
 extern unsigned long efi_call_virt_save_flags(void);

-enum efi_secureboot_mode {
-	efi_secureboot_mode_unset,
-	efi_secureboot_mode_unknown,
-	efi_secureboot_mode_disabled,
-	efi_secureboot_mode_enabled,
-};
-
 static inline
 enum efi_secureboot_mode efi_get_secureboot_mode(efi_get_variable_t *get_var)
 {
diff --git a/include/linux/lsm_hook_defs.h b/include/linux/lsm_hook_defs.h
index 61590c1f2d33..4c10750865c2 100644
--- a/include/linux/lsm_hook_defs.h
+++ b/include/linux/lsm_hook_defs.h
@@ -394,6 +394,8 @@ LSM_HOOK(void, LSM_RET_VOID, bpf_prog_free_security, struct bpf_prog_aux *aux)
 #endif /* CONFIG_BPF_SYSCALL */

 LSM_HOOK(int, 0, locked_down, enum lockdown_reason what)
+LSM_HOOK(int, 0, lock_kernel_down, const char *where, enum lockdown_reason level)
+

 #ifdef CONFIG_PERF_EVENTS
 LSM_HOOK(int, 0, perf_event_open, struct perf_event_attr *attr, int type)
diff --git a/include/linux/lsm_hooks.h b/include/linux/lsm_hooks.h
index 59024618554e..ab9ca4d393da 100644
--- a/include/linux/lsm_hooks.h
+++ b/include/linux/lsm_hooks.h
@@ -1545,6 +1545,12 @@
  *
  *     @what: kernel feature being accessed
  *
+ * @lock_kernel_down
+ * 	Put the kernel into lock-down mode.
+ *
+ * 	@where: Where the lock-down is originating from (e.g. command line option)
+ * 	@level: The lock-down level (can only increase)
+ *
  * Security hooks for perf events
  *
  * @perf_event_open:
diff --git a/include/linux/random.h b/include/linux/random.h
index f45b8be3e3c4..7ccdec68b789 100644
--- a/include/linux/random.h
+++ b/include/linux/random.h
@@ -14,6 +14,11 @@

 #include <uapi/linux/random.h>

+struct random_extrng {
+	ssize_t (*extrng_read)(void __user *buf, size_t buflen);
+	struct module *owner;
+};
+
 struct random_ready_callback {
 	struct list_head list;
 	void (*func)(struct random_ready_callback *rdy);
@@ -44,6 +49,8 @@ extern bool rng_is_initialized(void);
 extern int add_random_ready_callback(struct random_ready_callback *rdy);
 extern void del_random_ready_callback(struct random_ready_callback *rdy);
 extern int __must_check get_random_bytes_arch(void *buf, int nbytes);
+void random_register_extrng(const struct random_extrng *rng);
+void random_unregister_extrng(void);

 #ifndef MODULE
 extern const struct file_operations random_fops, urandom_fops;
diff --git a/include/linux/rmi.h b/include/linux/rmi.h
index ab7eea01ab42..fff7c5f737fc 100644
--- a/include/linux/rmi.h
+++ b/include/linux/rmi.h
@@ -364,6 +364,7 @@ struct rmi_driver_data {

 	struct rmi4_attn_data attn_data;
 	DECLARE_KFIFO(attn_fifo, struct rmi4_attn_data, 16);
+	struct work_struct attn_work;
 };

 int rmi_register_transport_device(struct rmi_transport_dev *xport);
diff --git a/include/linux/security.h b/include/linux/security.h
index 46a02ce34d00..37e991a10d70 100644
--- a/include/linux/security.h
+++ b/include/linux/security.h
@@ -472,6 +472,7 @@ int security_inode_notifysecctx(struct inode *inode, void *ctx, u32 ctxlen);
 int security_inode_setsecctx(struct dentry *dentry, void *ctx, u32 ctxlen);
 int security_inode_getsecctx(struct inode *inode, void **ctx, u32 *ctxlen);
 int security_locked_down(enum lockdown_reason what);
+int security_lock_kernel_down(const char *where, enum lockdown_reason level);
 #else /* CONFIG_SECURITY */

 static inline int call_blocking_lsm_notifier(enum lsm_event event, void *data)
@@ -1353,6 +1354,10 @@ static inline int security_locked_down(enum lockdown_reason what)
 {
 	return 0;
 }
+static inline int security_lock_kernel_down(const char *where, enum lockdown_reason level)
+{
+	return 0;
+}
 #endif	/* CONFIG_SECURITY */

 #if defined(CONFIG_SECURITY) && defined(CONFIG_WATCH_QUEUE)
diff --git a/init/Kconfig b/init/Kconfig
index 11f8a845f259..9b94cc1b5546 100644
--- a/init/Kconfig
+++ b/init/Kconfig
@@ -1648,7 +1648,7 @@ config AIO
 	  this option saves about 7k.

 config IO_URING
-	bool "Enable IO uring support" if EXPERT
+	bool "Enable IO uring support"
 	select IO_WQ
 	default y
 	help
diff --git a/kernel/module_signing.c b/kernel/module_signing.c
index 8723ae70ea1f..fb2d773498c2 100644
--- a/kernel/module_signing.c
+++ b/kernel/module_signing.c
@@ -38,8 +38,15 @@ int mod_verify_sig(const void *mod, struct load_info *info)
 	modlen -= sig_len + sizeof(ms);
 	info->len = modlen;

-	return verify_pkcs7_signature(mod, modlen, mod + modlen, sig_len,
+	ret = verify_pkcs7_signature(mod, modlen, mod + modlen, sig_len,
 				      VERIFY_USE_SECONDARY_KEYRING,
 				      VERIFYING_MODULE_SIGNATURE,
 				      NULL, NULL);
+	if (ret == -ENOKEY && IS_ENABLED(CONFIG_INTEGRITY_PLATFORM_KEYRING)) {
+		ret = verify_pkcs7_signature(mod, modlen, mod + modlen, sig_len,
+				VERIFY_USE_PLATFORM_KEYRING,
+				VERIFYING_MODULE_SIGNATURE,
+				NULL, NULL);
+	}
+	return ret;
 }
diff --git a/scripts/tags.sh b/scripts/tags.sh
index db8ba411860a..2294fb0f17a9 100755
--- a/scripts/tags.sh
+++ b/scripts/tags.sh
@@ -16,6 +16,8 @@ fi
 ignore="$(echo "$RCS_FIND_IGNORE" | sed 's|\\||g' )"
 # tags and cscope files should also ignore MODVERSION *.mod.c files
 ignore="$ignore ( -name *.mod.c ) -prune -o"
+# RHEL tags and cscope should also ignore redhat/rpm
+ignore="$ignore ( -path redhat/rpm ) -prune -o"

 # Use make KBUILD_ABS_SRCTREE=1 {tags|cscope}
 # to force full paths for a non-O= build
diff --git a/security/integrity/platform_certs/load_uefi.c b/security/integrity/platform_certs/load_uefi.c
index f290f78c3f30..d3e7ae04f5be 100644
--- a/security/integrity/platform_certs/load_uefi.c
+++ b/security/integrity/platform_certs/load_uefi.c
@@ -46,7 +46,8 @@ static __init void *get_cert_list(efi_char16_t *name, efi_guid_t *guid,
 		return NULL;

 	if (*status != EFI_BUFFER_TOO_SMALL) {
-		pr_err("Couldn't get size: 0x%lx\n", *status);
+		pr_err("Couldn't get size: %s (0x%lx)\n",
+		       efi_status_to_str(*status), *status);
 		return NULL;
 	}

@@ -57,7 +58,8 @@ static __init void *get_cert_list(efi_char16_t *name, efi_guid_t *guid,
 	*status = efi.get_variable(name, guid, NULL, &lsize, db);
 	if (*status != EFI_SUCCESS) {
 		kfree(db);
-		pr_err("Error reading db var: 0x%lx\n", *status);
+		pr_err("Error reading db var: %s (0x%lx)\n",
+		       efi_status_to_str(*status), *status);
 		return NULL;
 	}

diff --git a/security/lockdown/Kconfig b/security/lockdown/Kconfig
index e84ddf484010..d0501353a4b9 100644
--- a/security/lockdown/Kconfig
+++ b/security/lockdown/Kconfig
@@ -16,6 +16,19 @@ config SECURITY_LOCKDOWN_LSM_EARLY
 	  subsystem is fully initialised. If enabled, lockdown will
 	  unconditionally be called before any other LSMs.

+config LOCK_DOWN_IN_EFI_SECURE_BOOT
+	bool "Lock down the kernel in EFI Secure Boot mode"
+	default n
+	depends on EFI && SECURITY_LOCKDOWN_LSM_EARLY
+	help
+	  UEFI Secure Boot provides a mechanism for ensuring that the firmware
+	  will only load signed bootloaders and kernels.  Secure boot mode may
+	  be determined from EFI variables provided by the system firmware if
+	  not indicated by the boot parameters.
+
+	  Enabling this option results in kernel lockdown being triggered if
+	  EFI Secure Boot is set.
+
 choice
 	prompt "Kernel default lockdown mode"
 	default LOCK_DOWN_KERNEL_FORCE_NONE
diff --git a/security/lockdown/lockdown.c b/security/lockdown/lockdown.c
index 87cbdc64d272..18555cf18da7 100644
--- a/security/lockdown/lockdown.c
+++ b/security/lockdown/lockdown.c
@@ -73,6 +73,7 @@ static int lockdown_is_locked_down(enum lockdown_reason what)

 static struct security_hook_list lockdown_hooks[] __lsm_ro_after_init = {
 	LSM_HOOK_INIT(locked_down, lockdown_is_locked_down),
+	LSM_HOOK_INIT(lock_kernel_down, lock_kernel_down),
 };

 static int __init lockdown_lsm_init(void)
diff --git a/security/security.c b/security/security.c
index 67264cb08fb3..85a0227bfac1 100644
--- a/security/security.c
+++ b/security/security.c
@@ -2599,6 +2599,12 @@ int security_locked_down(enum lockdown_reason what)
 }
 EXPORT_SYMBOL(security_locked_down);

+int security_lock_kernel_down(const char *where, enum lockdown_reason level)
+{
+	return call_int_hook(lock_kernel_down, 0, where, level);
+}
+EXPORT_SYMBOL(security_lock_kernel_down);
+
 #ifdef CONFIG_PERF_EVENTS
 int security_perf_event_open(struct perf_event_attr *attr, int type)
 {