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e6209a3bef
linux-next/arch/x86/kvm/vmx
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Like Xu e6209a3bef KVM: vmx/pmu: Emulate legacy freezing LBRs on virtual PMI 
The current vPMU only supports Architecture Version 2. According to
Intel SDM "17.4.7 Freezing LBR and Performance Counters on PMI", if
IA32_DEBUGCTL.Freeze_LBR_On_PMI = 1, the LBR is frozen on the virtual
PMI and the KVM would emulate to clear the LBR bit (bit 0) in
IA32_DEBUGCTL. Also, guest needs to re-enable IA32_DEBUGCTL.LBR
to resume recording branches.

Signed-off-by: Like Xu <like.xu@linux.intel.com>
Reviewed-by: Andi Kleen <ak@linux.intel.com>
Message-Id: <20210201051039.255478-9-like.xu@linux.intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2021-02-04 05:27:25 -05:00
..
capabilities.h KVM: vmx/pmu: Emulate legacy freezing LBRs on virtual PMI 2021-02-04 05:27:25 -05:00
evmcs.c KVM: x86: hyper-v: allow KVM_GET_SUPPORTED_HV_CPUID as a system ioctl 2020-11-15 09:49:11 -05:00
evmcs.h KVM: VMX: eVMCS: make evmcs_sanitize_exec_ctrls() work again 2020-10-31 10:27:58 -04:00
nested.c KVM: VMX: Convert vcpu_vmx.exit_reason to a union 2021-02-04 05:27:21 -05:00
nested.h KVM: nVMX: check for required but missing VMCS12 in KVM_SET_NESTED_STATE 2020-07-27 09:04:49 -04:00
pmu_intel.c KVM: vmx/pmu: Emulate legacy freezing LBRs on virtual PMI 2021-02-04 05:27:25 -05:00
posted_intr.c KVM: VMX: Use x2apic_mode to avoid RDMSR when querying PI state 2021-02-04 05:27:22 -05:00
posted_intr.h KVM: vmx: rename pi_init to avoid conflict with paride 2020-10-24 04:09:54 -04:00
vmcs12.c KVM: nVMX: Remove non-functional "support" for CR3 target values 2020-04-21 09:13:09 -04:00
vmcs12.h KVM: nVMX: Remove non-functional "support" for CR3 target values 2020-04-21 09:13:09 -04:00
vmcs_shadow_fields.h KVM: Fix some out-dated function names in comment 2020-01-21 13:57:27 +01:00
vmcs.h KVM: VMX: Add a helper to test for a valid error code given an intr info 2020-09-28 07:57:50 -04:00
vmenter.S KVM/VMX: Use TEST %REG,%REG instead of CMP $0,%REG in vmenter.S 2020-12-11 19:00:57 -05:00
vmx_ops.h KVM: VMX: Rename ops.h to vmx_ops.h 2020-09-28 07:57:38 -04:00
vmx.c KVM: vmx/pmu: Emulate legacy freezing LBRs on virtual PMI 2021-02-04 05:27:25 -05:00
vmx.h KVM: vmx/pmu: Reduce the overhead of LBR pass-through or cancellation 2021-02-04 05:27:25 -05:00