diff options
| author | Wanpeng Li <wanpengli@tencent.com> | 2020-07-31 11:12:21 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-08-05 09:58:51 +0200 |
| commit | de0cd8f3814029bd6fd2a558017c5331c4062c16 (patch) | |
| tree | 2f3d7804ed4ac23de9a66a2b80089b232eae8c7b | |
| parent | d171419448a109b60a7159f3ad69f1b3a88aa770 (diff) | |
KVM: SVM: Fix disable pause loop exit/pause filtering capability on SVM
commit 830f01b089b12bbe93bd55f2d62837253012a30e upstream.
'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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | arch/x86/kvm/svm/svm.c | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/arch/x86/kvm/svm/svm.c b/arch/x86/kvm/svm/svm.c index a862c768fd54..7dbfc0bc738c 100644 --- a/arch/x86/kvm/svm/svm.c +++ b/arch/x86/kvm/svm/svm.c @@ -1105,7 +1105,7 @@ 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; @@ -2682,7 +2682,7 @@ 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); @@ -3727,7 +3727,7 @@ 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); } @@ -3892,6 +3892,9 @@ 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) |