Messages in this thread | | | Date | Wed, 16 Jul 2014 18:08:02 +0200 | From | Paolo Bonzini <> | Subject | Re: [PATCH 0/4] random,x86,kvm: Add and use MSR_KVM_GET_RNG_SEED |
| |
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.
Paolo
| |