diff options
| author | Like Xu <likexu@tencent.com> | 2022-04-11 12:19:30 +0200 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2022-06-08 10:47:39 +0200 |
| commit | fb358e0b811eec233f6db86d591b3af99d23c8e3 (patch) | |
| tree | 8f88e5c47c01db68f4e407976ba3b59db32e02aa /arch/x86/events/intel/core.c | |
| parent | KVM: VMX: enable IPI virtualization (diff) | |
| download | linux-fb358e0b811eec233f6db86d591b3af99d23c8e3.tar.xz linux-fb358e0b811eec233f6db86d591b3af99d23c8e3.zip | |
perf/x86/intel: Add EPT-Friendly PEBS for Ice Lake Server
Add support for EPT-Friendly PEBS, a new CPU feature that enlightens PEBS
to translate guest linear address through EPT, and facilitates handling
VM-Exits that occur when accessing PEBS records. More information can
be found in the December 2021 release of Intel's SDM, Volume 3,
18.9.5 "EPT-Friendly PEBS". This new hardware facility makes sure the
guest PEBS records will not be lost, which is available on Intel Ice Lake
Server platforms (and later).
KVM will check this field through perf_get_x86_pmu_capability() instead
of hard coding the CPU models in the KVM code. If it is supported, the
guest PEBS capability will be exposed to the guest. Guest PEBS can be
enabled when and only when "EPT-Friendly PEBS" is supported and
EPT is enabled.
Cc: linux-perf-users@vger.kernel.org
Signed-off-by: Like Xu <likexu@tencent.com>
Message-Id: <20220411101946.20262-2-likexu@tencent.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'arch/x86/events/intel/core.c')
| -rw-r--r-- | arch/x86/events/intel/core.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/x86/events/intel/core.c b/arch/x86/events/intel/core.c index 45024abd929f..96bb0ac7462b 100644 --- a/arch/x86/events/intel/core.c +++ b/arch/x86/events/intel/core.c @@ -6138,6 +6138,7 @@ __init int intel_pmu_init(void) case INTEL_FAM6_ICELAKE_X: case INTEL_FAM6_ICELAKE_D: + x86_pmu.pebs_ept = 1; pmem = true; fallthrough; case INTEL_FAM6_ICELAKE_L: |