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AJvYcCXRdrZ8naAAch5rFnVFbD4mKIjvFmWcAZfWHI8JjTaUVy2p4Qw3nb7fW2A6J9YYV89E3YEAMr9B7bN2+wA=@vger.kernel.org X-Gm-Message-State: AOJu0Ywc/1+q0qvBwAURk6Q1EFeb5DFx75dCRNYXUNg5zqXu6HtqZEb/ RuUuNUtK9enBRGncB7bED/uFcyJerb5zbEXIwOcvSmpbTpnELhXiPmT3QbTynbTMNnGNOBevJVi dsnTLMg== X-Google-Smtp-Source: AGHT+IENXCH4SuSphP+WfGGDSdjGmLGhnHOBJ/boJsiqZ+MqMV4PbdSmBjtFRZdUumVba4F8E0AnJQ71O+s= X-Received: from pjbsb16.prod.google.com ([2002:a17:90b:50d0:b0:32b:92ac:cfb9]) (user=seanjc job=prod-delivery.src-stubby-dispatcher) by 2002:a17:90b:4f:b0:32d:3713:5a4f with SMTP id 98e67ed59e1d1-32d43ef6e16mr23388863a91.3.1757541833526; Wed, 10 Sep 2025 15:03:53 -0700 (PDT) Date: Wed, 10 Sep 2025 15:03:51 -0700 In-Reply-To: <20250718001905.196989-3-dapeng1.mi@linux.intel.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 References: <20250718001905.196989-1-dapeng1.mi@linux.intel.com> <20250718001905.196989-3-dapeng1.mi@linux.intel.com> Message-ID: Subject: Re: [PATCH v2 2/5] KVM: selftests: Add timing_info bit support in vmx_pmu_caps_test From: Sean Christopherson To: Dapeng Mi Cc: Paolo Bonzini , kvm@vger.kernel.org, linux-kernel@vger.kernel.org, Jim Mattson , Mingwei Zhang , Zide Chen , Das Sandipan , Shukla Manali , Yi Lai , Dapeng Mi Content-Type: text/plain; charset="us-ascii" On Fri, Jul 18, 2025, Dapeng Mi wrote: > A new bit PERF_CAPABILITIES[17] called "PEBS_TIMING_INFO" bit is added > to indicated if PEBS supports to record timing information in a new > "Retried Latency" field. > > Since KVM requires user can only set host consistent PEBS capabilities, > otherwise the PERF_CAPABILITIES setting would fail, so add > pebs_timing_info bit into "immutable_caps" to block host inconsistent > PEBS configuration and cause errors. Please explain the removal of anythread_deprecated. AFAICT, something like this is accurate: Opportunistically drop the anythread_deprecated bit. It isn't and likely never was a PERF_CAPABILITIES flag, the test's definition snuck in when the union was copy+pasted from the kernel's definition. > Signed-off-by: Dapeng Mi > Tested-by: Yi Lai > --- > tools/testing/selftests/kvm/x86/vmx_pmu_caps_test.c | 3 ++- > 1 file changed, 2 insertions(+), 1 deletion(-) > > diff --git a/tools/testing/selftests/kvm/x86/vmx_pmu_caps_test.c b/tools/testing/selftests/kvm/x86/vmx_pmu_caps_test.c > index a1f5ff45d518..f8deea220156 100644 > --- a/tools/testing/selftests/kvm/x86/vmx_pmu_caps_test.c > +++ b/tools/testing/selftests/kvm/x86/vmx_pmu_caps_test.c > @@ -29,7 +29,7 @@ static union perf_capabilities { > u64 pebs_baseline:1; > u64 perf_metrics:1; > u64 pebs_output_pt_available:1; > - u64 anythread_deprecated:1; > + u64 pebs_timing_info:1; > }; > u64 capabilities; > } host_cap; > @@ -44,6 +44,7 @@ static const union perf_capabilities immutable_caps = { > .pebs_arch_reg = 1, > .pebs_format = -1, > .pebs_baseline = 1, > + .pebs_timing_info = 1, > }; > > static const union perf_capabilities format_caps = { > -- > 2.34.1 >