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KVM: SVM: Fix disable pause loop exit/pause filtering capability on SVM

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'Commit 8566ac8b8e ("KVM: SVM: Implement pause loop exit logic in SVM")'
drops disable pause loop exit/pause filtering capability completely, I
guess it is a merge fault by Radim since disable vmexits capabilities and
pause loop exit for SVM patchsets are merged at the same time. This patch
reintroduces the disable pause loop exit/pause filtering capability support.

Reported-by: Haiwei Li <lihaiwei@tencent.com>
Tested-by: Haiwei Li <lihaiwei@tencent.com>
Fixes: 8566ac8b ("KVM: SVM: Implement pause loop exit logic in SVM")
Signed-off-by: Wanpeng Li <wanpengli@tencent.com>
Message-Id: <1596165141-28874-3-git-send-email-wanpengli@tencent.com>
Cc: stable@vger.kernel.org
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Wanpeng Li 2020-07-31 11:12:21 +08:00 committed by Paolo Bonzini
parent d2286ba7d5
commit 830f01b089
1 changed files with 6 additions and 3 deletions
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9
arch/x86/kvm/svm/svm.c
View file

@ -1090,7 +1090,7 @@ static void init_vmcb(struct vcpu_svm *svm)
svm->nested.vmcb = 0;
svm->vcpu.arch.hflags = 0;
if (pause_filter_count) {
if (!kvm_pause_in_guest(svm->vcpu.kvm)) {
control->pause_filter_count = pause_filter_count;
if (pause_filter_thresh)
control->pause_filter_thresh = pause_filter_thresh;
@ -2693,7 +2693,7 @@ static int pause_interception(struct vcpu_svm *svm)
struct kvm_vcpu *vcpu = &svm->vcpu;
bool in_kernel = (svm_get_cpl(vcpu) == 0);
if (pause_filter_thresh)
if (!kvm_pause_in_guest(vcpu->kvm))
grow_ple_window(vcpu);
kvm_vcpu_on_spin(vcpu, in_kernel);
@ -3780,7 +3780,7 @@ static void svm_handle_exit_irqoff(struct kvm_vcpu *vcpu)
static void svm_sched_in(struct kvm_vcpu *vcpu, int cpu)
{
if (pause_filter_thresh)
if (!kvm_pause_in_guest(vcpu->kvm))
shrink_ple_window(vcpu);
}
@ -3958,6 +3958,9 @@ static void svm_vm_destroy(struct kvm *kvm)
static int svm_vm_init(struct kvm *kvm)
{
if (!pause_filter_count || !pause_filter_thresh)
kvm->arch.pause_in_guest = true;
if (avic) {
int ret = avic_vm_init(kvm);
if (ret)