Re: [PATCH v3 6/9] KVM: vmx/pmu: Add MSR_ARCH_LBR_CTL emulation for Arch LBR

On Thu, Mar 04, 2021, Xu, Like wrote: > On 2021/3/4 1:19, Sean Christopherson wrote: > > > @@ -4463,6 +4470,8 @@ static void vmx_vcpu_reset(struct kvm_vcpu *vcpu, > > > bool init_event) > > > vmcs_writel(GUEST_SYSENTER_ESP, 0); > > >

Re: [PATCH v3 6/9] KVM: vmx/pmu: Add MSR_ARCH_LBR_CTL emulation for Arch LBR

On 2021/3/4 1:19, Sean Christopherson wrote: On Wed, Mar 03, 2021, Like Xu wrote: diff --git a/arch/x86/kvm/vmx/pmu_intel.c b/arch/x86/kvm/vmx/pmu_intel.c index 25d620685ae7..d14a14eb712d 100644 --- a/arch/x86/kvm/vmx/pmu_intel.c +++ b/arch/x86/kvm/vmx/pmu_intel.c @@ -19,6 +19,7 @@ #include

Re: [PATCH v3 6/9] KVM: vmx/pmu: Add MSR_ARCH_LBR_CTL emulation for Arch LBR

On Wed, Mar 03, 2021, Like Xu wrote: > diff --git a/arch/x86/kvm/vmx/pmu_intel.c b/arch/x86/kvm/vmx/pmu_intel.c > index 25d620685ae7..d14a14eb712d 100644 > --- a/arch/x86/kvm/vmx/pmu_intel.c > +++ b/arch/x86/kvm/vmx/pmu_intel.c > @@ -19,6 +19,7 @@ > #include "pmu.h" > > #define

[PATCH v3 6/9] KVM: vmx/pmu: Add MSR_ARCH_LBR_CTL emulation for Arch LBR

Arch LBRs are enabled by setting MSR_ARCH_LBR_CTL.LBREn to 1. A new guest state field named "Guest IA32_LBR_CTL" is added to enhance guest LBR usage. When guest Arch LBR is enabled, a guest LBR event will be created like the model-specific LBR does. On processors that support Arch LBR,