Messages in this thread | | | Date | Wed, 23 Jun 2021 16:21:48 +0000 | From | Sean Christopherson <> | Subject | Re: [PATCH RFC] KVM: nSVM: Fix L1 state corruption upon return from SMM |
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On Wed, Jun 23, 2021, Sean Christopherson wrote: > And I believe this hackery is necessary only because nested_svm_vmexit() isn't > following the architcture in the first place. I.e. using vmcb01 to restore > host state is flat out wrong.
Ah, that's not true, using vmcb01 is allowed by "may store some or all host state in hidden on-chip memory".
From a performance perspective, I do like the SMI/RSM shenanigans. I'm not totally opposed to the trickery since I think it will break a guest if and only if the L1 guest is also violating the APM. And we're not fudging the spec thaat much :-)
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