Messages in this thread | | | Date | Wed, 16 Jul 2014 09:13:23 -0700 | From | "H. Peter Anvin" <> | Subject | Re: [PATCH 0/4] random,x86,kvm: Add and use MSR_KVM_GET_RNG_SEED |
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On 07/16/2014 09:08 AM, Paolo Bonzini wrote: > Il 16/07/2014 18:03, H. Peter Anvin ha scritto: >> I suggested emulating RDRAND *but not set the CPUID bit*. We already >> developed a protocol in KVM/Qemu to enumerate emulated features (created >> for MOVBE as I recall), specifically to service the semantic "feature X >> will work but will be substantially slower than normal." > > But those will set the CPUID bit. There is currently no way for KVM > guests to know if a CPUID bit is real or emulated. >
OK, so there wasn't any protocol implemented in the end. I sit corrected.
-hpa
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