Messages in this thread | | | From | Vitaly Kuznetsov <> | Subject | Re: [PATCH v2 3/7] KVM: nVMX: Ignore 'hv_clean_fields' data when eVMCS data is copied in vmx_get_nested_state() | Date | Mon, 24 May 2021 16:12:43 +0200 |
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Paolo Bonzini <pbonzini@redhat.com> writes:
> On 17/05/21 15:50, Vitaly Kuznetsov wrote: >> 'Clean fields' data from enlightened VMCS is only valid upon vmentry: L1 >> hypervisor is not obliged to keep it up-to-date while it is mangling L2's >> state, KVM_GET_NESTED_STATE request may come at a wrong moment when actual >> eVMCS changes are unsynchronized with 'hv_clean_fields'. As upon migration >> VMCS12 is used as a source of ultimate truth, we must make sure we pick all >> the changes to eVMCS and thus 'clean fields' data must be ignored. > > While you're at it, would you mind making copy_vmcs12_to_enlightened and > copy_enlightened_to_vmcs12 void? >
Sure, no problem.
-- Vitaly
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