On Thu, Apr 18, 2013 at 10:45:38AM +0000, Ren, Yongjie wrote: > qemu64 is the default CPU model for QEMU/KVM on x86-64, but its family number > definition is not accurate. The vendor of 'qemu64' is defined as 'AMD'. For AMD > processors, AMD K8 (i.e. Family 15) firstly introduced SSE3 instruction set. > 'qemu64' already has 'CPUID_EXT_SSE3' in its ext_features, but its family > number is only 6 which is not equal to or greater than 15. > So, upgrade the CPU family number of qemu64 model to 15. > After this upgrade, 32bit Windows 8 can boot up with qemu64 CPU model. > This upgrade can be also a fix to the below bug about 32bit Windows 8 booting. > https://bugs.launchpad.net/qemu/+bug/1007269 Changing cpuid info is not that simple since this is guest visible information and can impact migration. Old machine models should still expose the old family. > > Signed-off-by: Yongjie Ren <yongjie.ren@xxxxxxxxx> > --- > target-i386/cpu.c | 2 +- > 1 files changed, 1 insertions(+), 1 deletions(-) > > diff --git a/target-i386/cpu.c b/target-i386/cpu.c > index e2302d8..3f8e6c3 100644 > --- a/target-i386/cpu.c > +++ b/target-i386/cpu.c > @@ -420,7 +420,7 @@ static x86_def_t builtin_x86_defs[] = { > .name = "qemu64", > .level = 4, > .vendor = CPUID_VENDOR_AMD, > - .family = 6, > + .family = 15, > .model = 2, > .stepping = 3, > .features = PPRO_FEATURES | > -- > 1.7.1 -- Gleb. -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
