| From | Maxim Levitsky <> | Subject | [PATCH v2 01/11] KVM: nSVM: don't sync back tlb_ctl on nested VM exit | Date | Tue, 29 Nov 2022 21:37:07 +0200 |
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The CPU doesn't change TLB_CTL value as stated in the PRM (15.16.2):
"The VMRUN instruction reads, but does not change, the value of the TLB_CONTROL field"
Therefore the KVM shouldn't do that either.
Signed-off-by: Maxim Levitsky <mlevitsk@redhat.com> --- arch/x86/kvm/svm/nested.c | 1 - 1 file changed, 1 deletion(-)
diff --git a/arch/x86/kvm/svm/nested.c b/arch/x86/kvm/svm/nested.c index bc9cd7086fa972..37af0338da7c32 100644 --- a/arch/x86/kvm/svm/nested.c +++ b/arch/x86/kvm/svm/nested.c @@ -1010,7 +1010,6 @@ int nested_svm_vmexit(struct vcpu_svm *svm) vmcb12->control.next_rip = vmcb02->control.next_rip; vmcb12->control.int_ctl = svm->nested.ctl.int_ctl; - vmcb12->control.tlb_ctl = svm->nested.ctl.tlb_ctl; vmcb12->control.event_inj = svm->nested.ctl.event_inj; vmcb12->control.event_inj_err = svm->nested.ctl.event_inj_err; -- 2.26.3
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