linux-kernel - [PATCH 6/7] KVM: nSVM: do not reload pause filter fields from VMCB

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Date:   Fri, 15 May 2020 13:41:43 -0400
From:   Paolo Bonzini <pbonzini@...hat.com>
To:     linux-kernel@...r.kernel.org, kvm@...r.kernel.org
Cc:     Cathy Avery <cavery@...hat.com>,
        Liran Alon <liran.alon@...cle.com>,
        Jim Mattson <jmattson@...gle.com>
Subject: [PATCH 6/7] KVM: nSVM: do not reload pause filter fields from VMCB

These fields do not change from VMRUN to VMEXIT; there is no need
to reload them on nested VMEXIT.

Signed-off-by: Paolo Bonzini <pbonzini@...hat.com>
---
 arch/x86/kvm/svm/nested.c | 5 -----
 1 file changed, 5 deletions(-)

diff --git a/arch/x86/kvm/svm/nested.c b/arch/x86/kvm/svm/nested.c
index e3338aa8b0a3..ba7dedbcc985 100644
--- a/arch/x86/kvm/svm/nested.c
+++ b/arch/x86/kvm/svm/nested.c
@@ -544,11 +544,6 @@ int nested_svm_vmexit(struct vcpu_svm *svm)
 	nested_vmcb->control.event_inj         = 0;
 	nested_vmcb->control.event_inj_err     = 0;
 
-	nested_vmcb->control.pause_filter_count =
-		svm->vmcb->control.pause_filter_count;
-	nested_vmcb->control.pause_filter_thresh =
-		svm->vmcb->control.pause_filter_thresh;
-
 	/* We always set V_INTR_MASKING and remember the old value in svm->nested */
 	if (!(svm->nested.int_ctl & V_INTR_MASKING_MASK))
 		nested_vmcb->control.int_ctl &= ~V_INTR_MASKING_MASK;
-- 
2.18.2