On Sun, Jul 12, 2009 at 04:10:55PM +0300, Gleb Natapov wrote: > We emulate x2apic in software, so host support is not required. > > Signed-off-by: Gleb Natapov <gleb@xxxxxxxxxx> > diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c > index 00844eb..c256da7 100644 > --- a/arch/x86/kvm/x86.c > +++ b/arch/x86/kvm/x86.c > @@ -1497,6 +1497,9 @@ static void do_cpuid_ent(struct kvm_cpuid_entry2 *entry, u32 function, > case 1: > entry->edx &= kvm_supported_word0_x86_features; > entry->ecx &= kvm_supported_word4_x86_features; > + /* we support x2apic emulation even if host does not support > + it since we emulate x2apic in software */ > + entry->ecx |= F(X2APIC); > break; > /* function 2 entries are STATEFUL. That is, repeated cpuid commands > * may return different values. This forces us to get_cpu() before > -- > Gleb. What if you have an older host that does not support emulate x2apic? -- 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
