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KVM: SVM: Skip intercepted PAUSE instructions after emulation

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Skip PAUSE after interception to avoid unnecessarily re-executing the
instruction in the guest, e.g. after regaining control post-yield.
This is a benign bug as KVM disables PAUSE interception if filtering is
off, including the case where pause_filter_count is set to zero.

Signed-off-by: Sean Christopherson <seanjc@google.com>
Message-Id: <20210205005750.3841462-10-seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Sean Christopherson
2021-02-04 16:57:50 -08:00
committed by Paolo Bonzini
parent 32c23c7d52
commit c8781feaf1
1 changed files with 1 additions and 1 deletions
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2
arch/x86/kvm/svm/svm.c
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@@ -2980,7 +2980,7 @@ static int pause_interception(struct kvm_vcpu *vcpu)
grow_ple_window(vcpu);
kvm_vcpu_on_spin(vcpu, in_kernel);
return 1;
return kvm_skip_emulated_instruction(vcpu);
}
static int invpcid_interception(struct kvm_vcpu *vcpu)