Re: [PATCH 0/4] random,x86,kvm: Add and use MSR_KVM_GET_RNG_SEED

[H. Peter Anvin]

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


--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/