Messages in this thread | | | Date | Wed, 25 Jul 2012 10:58:11 +0400 | From | Vladimir Davydov <> | Subject | Re: [PATCH 2/2] cpu: intel, amd: mask cleared cpuid features |
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On 07/25/2012 04:57 AM, H. Peter Anvin wrote: > On 07/24/2012 04:09 AM, Vladimir Davydov wrote: >> We have not encountered this situation in our environments and I hope we >> won't :-) >> >> But look, these CPUID functions cover majority of CPU features, don't >> they? So, most of "normal" apps inside VM will survive migration. >> Perhaps, some low-level utils won't. I guess that's why there are no >> MSRs for other levels provided by vendors. >> > You will once Ivy Bridge becomes common.
Ivy Bridge has CPUID faulting, which allows masking all CPUID levels/functions.
> -hpa >
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