From a3c975852ea909b93953f53a39ab4c696c595091 Mon Sep 17 00:00:00 2001 From: Cole Robinson 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. Signed-off-by: Cole Robinson --- hw/pc_piix.c | 20 ++++++++++++++++---- 1 file changed, 16 insertions(+), 4 deletions(-) diff --git a/hw/pc_piix.c b/hw/pc_piix.c index 0af436c..e3f8e96 100644 --- a/hw/pc_piix.c +++ b/hw/pc_piix.c @@ -331,6 +331,13 @@ 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,\ {\ @@ -354,6 +361,10 @@ 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",\ @@ -371,6 +382,7 @@ static QEMUMachine pc_machine_v1_2 = { DEFAULT_MACHINE_OPTIONS, }; + #define PC_COMPAT_1_1 \ PC_COMPAT_1_2,\ {\ @@ -384,19 +396,19 @@ 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",\