qemu/0004-pc_piix-Add-compat-handling-for-qemu-kvm-VGA-mem-siz.patch
Cole Robinson 7fae7fbaf1 Update to qemu 1.5
KVM for ARM support
A native GTK+ UI with internationalization support
Experimental VFIO support for VGA passthrough
Support for VMware PVSCSI and VMXNET3 device emulation
CPU hot-add support
2013-05-21 14:26:12 -04:00

82 lines
2.6 KiB
Diff

From 3e580f65ac69c7a84b672a59de6772dae24b5a8a Mon Sep 17 00:00:00 2001
From: Cole Robinson <crobinso@redhat.com>
Date: Tue, 19 Feb 2013 15:35:40 -0500
Subject: [PATCH] pc_piix: Add compat handling for qemu-kvm VGA mem size
Paolo outlines this here:
https://lists.gnu.org/archive/html/qemu-devel/2013-01/msg02540.html
qemu-kvm defaulted to vgamem=16MB since at least 0.15, while qemu used
8MB. For qemu 1.2, the default was changed to 16MB for all devices
except cirrus.
If --enable-migration-from-qemu-kvm is specified, make sure cirrus
uses 16MB for <= pc-1.2 (the qemu-kvm merge), and 16MB always for
all others. This will break incoming qemu migration for qemu < 1.3.
---
hw/i386/pc_piix.c | 20 ++++++++++++++++----
1 file changed, 16 insertions(+), 4 deletions(-)
diff --git a/hw/i386/pc_piix.c b/hw/i386/pc_piix.c
index 43ab480..48fb7b7 100644
--- a/hw/i386/pc_piix.c
+++ b/hw/i386/pc_piix.c
@@ -383,6 +383,13 @@ static QEMUMachine pc_machine_v1_3 = {
DEFAULT_MACHINE_OPTIONS,
};
+#ifdef CONFIG_MIGRATE_FROM_QEMU_KVM
+/* qemu-kvm defaulted to 16MB video memory since 0.15 at least. */
+# define OLD_VGA_MEM stringify(16)
+#else
+# define OLD_VGA_MEM stringify(8)
+#endif
+
#define PC_COMPAT_1_2 \
PC_COMPAT_1_3,\
{\
@@ -406,6 +413,10 @@ static QEMUMachine pc_machine_v1_3 = {
.property = "revision",\
.value = stringify(3),\
},{\
+ .driver = "cirrus-vga",\
+ .property = "vgamem_mb",\
+ .value = OLD_VGA_MEM,\
+ },{\
.driver = "VGA",\
.property = "mmio",\
.value = "off",\
@@ -423,6 +434,7 @@ static QEMUMachine pc_machine_v1_2 = {
DEFAULT_MACHINE_OPTIONS,
};
+
#define PC_COMPAT_1_1 \
PC_COMPAT_1_2,\
{\
@@ -436,19 +448,19 @@ static QEMUMachine pc_machine_v1_2 = {
},{\
.driver = "VGA",\
.property = "vgamem_mb",\
- .value = stringify(8),\
+ .value = OLD_VGA_MEM,\
},{\
.driver = "vmware-svga",\
.property = "vgamem_mb",\
- .value = stringify(8),\
+ .value = OLD_VGA_MEM,\
},{\
.driver = "qxl-vga",\
.property = "vgamem_mb",\
- .value = stringify(8),\
+ .value = OLD_VGA_MEM,\
},{\
.driver = "qxl",\
.property = "vgamem_mb",\
- .value = stringify(8),\
+ .value = OLD_VGA_MEM,\
},{\
.driver = "virtio-blk-pci",\
.property = "config-wce",\