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SubjectRe: [PATCH 03/15] KVM: SVM: Inject #UD on RDTSCP when it should be disabled in the guest
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On 04/05/21 23:53, Sean Christopherson wrote:
>> Does the right thing happen here if the vCPU is in guest mode when
>> userspace decides to toggle the CPUID.80000001H:EDX.RDTSCP bit on or
>> off?
> I hate our terminology. By "guest mode", do you mean running the vCPU, or do
> you specifically mean running in L2?
>

Guest mode should mean L2.

(I wonder if we should have a capability that says "KVM_SET_CPUID2 can
only be called prior to KVM_RUN").

Paolo

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