From: Maxim Levitsky Date: Tue, 29 Nov 2022 19:37:07 +0000 (+0200) Subject: KVM: nSVM: Don't sync tlb_ctl back to vmcb12 on nested VM-Exit X-Git-Tag: v6.3-rc1~85^2~7^2~4 X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=8957cbcfed0a7e423695d90600b2643dda31fc7b;p=thirdparty%2Fkernel%2Fstable.git KVM: nSVM: Don't sync tlb_ctl back to vmcb12 on nested VM-Exit Don't sync the TLB control field from vmcb02 to vmcs12 on nested VM-Exit. Per AMD's APM, the field is not modified by hardware: The VMRUN instruction reads, but does not change, the value of the TLB_CONTROL field Signed-off-by: Maxim Levitsky Tested-by: Santosh Shukla Link: https://lore.kernel.org/r/20221129193717.513824-2-mlevitsk@redhat.com [sean: massage changelog] Signed-off-by: Sean Christopherson --- diff --git a/arch/x86/kvm/svm/nested.c b/arch/x86/kvm/svm/nested.c index 700df66d23c74..05d38944a6c0f 100644 --- a/arch/x86/kvm/svm/nested.c +++ b/arch/x86/kvm/svm/nested.c @@ -1008,7 +1008,6 @@ 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;