Messages in this thread | | | Subject | Re: [PATCH 05/54] Revert "KVM: x86/mmu: Drop kvm_mmu_extended_role.cr4_la57 hack" | From | Paolo Bonzini <> | Date | Fri, 25 Jun 2021 12:25:46 +0200 |
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On 25/06/21 11:29, Yu Zhang wrote: > Thanks, Paolo. > > Do you mean the L1 can modify its paging mode by setting HOST_CR3 as root of > a PML5 table in VMCS12 and HOST_CR4 with LA57 flipped in VMCS12, causing the > GUEST_CR3/4 being changed in VMCS01, and eventually updating the CR3/4 when > L0 is injecting a VM Exit from L2?
Yes, you can even do that without a "full" vmentry by setting invalid guest state in vmcs12. :)
Paolo
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