On Sun, Apr 14, 2013 at 11:36:29AM -0700, H. Peter Anvin wrote:
> Just to interject here... all this is about host kernel vs userspace,
> correct? I.e. nothing that affects the guest. I assume that the guest
> sees CPUID and that is what is supported.
Actually, currently the guest sees MOVBE in CPUID set:
max base function: 0x00000005
CPUID.EAX=0x00000000
EAX=0x00000005, EBX=0x68747541, ECX=0x444d4163, EDX=0x69746e65
CPUID.EAX=0x00000001
EAX=0x000106c2, EBX=0x01000800, ECX=0x80400201, EDX=0x0789fbff
^
|- bit 22
even though host (AMD) doesn't support it.
And I'd say we want it that way because the guest should show it in
CPUID so that not only the guest kernel but also guest userspace
binaries built with MOVBE can be run.
--
Regards/Gruss,
Boris.
Sent from a fat crate under my desk. Formatting is fine.
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