On 8/5/23 00:21, Sean Christopherson wrote:
Oooh, the MSRs that don't exempt host_initiated are added to the list
(are *not* added)
of MSRs to save/restore, i.e. KVM "silently" supports
MSR_AMD64_OSVW_ID_LENGTH and MSR_AMD64_OSVW_STATUS.
And guest_pv_has() returns true unless userspace has opted in to
enforcement.
Two different ways of having the same bug. The latter was introduced in
the implementation of KVM_CAP_ENFORCE_PV_FEATURE_CPUID; it would become
a problem if some selftests started using it.
Paolo
