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| author | Like Xu <like.xu@linux.intel.com> | 2022-04-11 12:19:38 +0200 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2022-06-08 10:48:00 +0200 |
| commit | 6ebe44366bdeaf3059f2b644bbd99824ae824228 (patch) | |
| tree | 52f44a3c6b9d6892b9dc56c12a5ea233f1820771 /arch/x86/kvm/pmu.h | |
| parent | KVM: x86/pmu: Reprogram PEBS event to emulate guest PEBS counter (diff) | |
| download | linux-6ebe44366bdeaf3059f2b644bbd99824ae824228.tar.xz linux-6ebe44366bdeaf3059f2b644bbd99824ae824228.zip | |
KVM: x86/pmu: Adjust precise_ip to emulate Ice Lake guest PDIR counter
The PEBS-PDIR facility on Ice Lake server is supported on IA31_FIXED0 only.
If the guest configures counter 32 and PEBS is enabled, the PEBS-PDIR
facility is supposed to be used, in which case KVM adjusts attr.precise_ip
to 3 and request host perf to assign the exactly requested counter or fail.
The CPU model check is also required since some platforms may place the
PEBS-PDIR facility in another counter index.
Signed-off-by: Like Xu <like.xu@linux.intel.com>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Message-Id: <20220411101946.20262-10-likexu@tencent.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'arch/x86/kvm/pmu.h')
| -rw-r--r-- | arch/x86/kvm/pmu.h | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/arch/x86/kvm/pmu.h b/arch/x86/kvm/pmu.h index e745f443b6a8..5966ce18a82b 100644 --- a/arch/x86/kvm/pmu.h +++ b/arch/x86/kvm/pmu.h @@ -4,6 +4,8 @@ #include <linux/nospec.h> +#include <asm/cpu_device_id.h> + #define vcpu_to_pmu(vcpu) (&(vcpu)->arch.pmu) #define pmu_to_vcpu(pmu) (container_of((pmu), struct kvm_vcpu, arch.pmu)) #define pmc_to_pmu(pmc) (&(pmc)->vcpu->arch.pmu) @@ -15,6 +17,12 @@ #define VMWARE_BACKDOOR_PMC_REAL_TIME 0x10001 #define VMWARE_BACKDOOR_PMC_APPARENT_TIME 0x10002 +static const struct x86_cpu_id vmx_icl_pebs_cpu[] = { + X86_MATCH_INTEL_FAM6_MODEL(ICELAKE_D, NULL), + X86_MATCH_INTEL_FAM6_MODEL(ICELAKE_X, NULL), + {} +}; + struct kvm_event_hw_type_mapping { u8 eventsel; u8 unit_mask; |