On Fri, 31 Jul 2020 at 15:21, Paolo Bonzini <pbonzini@xxxxxxxxxx> wrote: > > On 31/07/20 05:12, Wanpeng Li wrote: > > From: Wanpeng Li <wanpengli@xxxxxxxxxxx> > > > > '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@xxxxxxxxxxx> > > Tested-by: Haiwei Li <lihaiwei@xxxxxxxxxxx> > > Fixes: 8566ac8b (KVM: SVM: Implement pause loop exit logic in SVM) > > Signed-off-by: Wanpeng Li <wanpengli@xxxxxxxxxxx> > > --- > > v2 -> v3: > > * simplify the condition in init_vmcb() > > > > arch/x86/kvm/svm/svm.c | 9 ++++++--- > > 1 file changed, 6 insertions(+), 3 deletions(-) > > > > diff --git a/arch/x86/kvm/svm/svm.c b/arch/x86/kvm/svm/svm.c > > index c0da4dd..bf77f90 100644 > > --- a/arch/x86/kvm/svm/svm.c > > +++ b/arch/x86/kvm/svm/svm.c > > @@ -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) > > > > Queued all three, thanks. Please do send a testcase for patch 1 > however, I only queued it in order to have it in 5.8. Thanks, will do in the next week, today is too busy. :) Wanpeng