KVM: SVM: Fix disable pause loop exit/pause filtering capability on SVM
'Commit 8566ac8b8e7c ("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>
diff --git a/arch/x86/kvm/svm/svm.c b/arch/x86/kvm/svm/svm.c
index c0da4dd..5bbf761 100644
--- a/arch/x86/kvm/svm/svm.c
+++ b/arch/x86/kvm/svm/svm.c
@@ -1090,7 +1090,7 @@
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 @@
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_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 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)
