From: Yosry Ahmed <yosry@kernel.org>
To: Zide Chen <zide.chen@intel.com>
Cc: Sean Christopherson <seanjc@google.com>,
Paolo Bonzini <pbonzini@redhat.com>,
Peter Zijlstra <peterz@infradead.org>,
kvm@vger.kernel.org, Jim Mattson <jmattson@google.com>,
Andi Kleen <ak@linux.intel.com>,
Stephane Eranian <eranian@google.com>,
linux-kernel@vger.kernel.org, Mingwei Zhang <mizhang@google.com>,
Das Sandipan <Sandipan.Das@amd.com>,
Shukla Manali <Manali.Shukla@amd.com>,
Dapeng Mi <dapeng1.mi@linux.intel.com>,
Xudong Hao <xudong.hao@intel.com>
Subject: Re: [PATCH v4 05/21] KVM: x86/pmu: Use pmc_exists in PMC lookup helpers
Date: Sat, 14 Nov 2026 18:53:53 +0000 [thread overview]
Message-ID: <aviuEiOQtxj6xv7G@google.com> (raw)
In-Reply-To: <20261112203227.289379-6-zide.chen@intel.com>
On Thu, Nov 12, 2026 at 01:32:11PM -0700, Zide Chen wrote:
> pmu->nr_arch_{gp,fixed}_counters cannot represent non-contiguous GP or
> fixed counters.
>
> Introduce kvm_is_{gp,fixed}_pmc_supported() to validate counter indices
> via pmu->pmc_exists, and switch the PMC lookup helpers to use them in
> preparation for dropping nr_arch_{gp,fixed}_counters.
>
> No functional change intended.
>
> Co-developed-by: Dapeng Mi <dapeng1.mi@linux.intel.com>
> Signed-off-by: Dapeng Mi <dapeng1.mi@linux.intel.com>
> Signed-off-by: Zide Chen <zide.chen@intel.com>
Reviewed-by: Yosry Ahmed <yosry@kernel.org>
next prev parent reply other threads:[~2026-11-14 18:53 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-11-12 20:32 [PATCH v4 00/21] KVM: x86/pmu: Add mediated vPMU PerfMon v5 support Zide Chen
2026-11-12 20:32 ` [PATCH v4 01/21] KVM: SVM: Drop counter MSR checks in amd_is_valid_msr() Zide Chen
2026-11-14 18:49 ` Yosry Ahmed
2026-11-12 20:32 ` [PATCH v4 02/21] KVM: x86/pmu: Remove redundant Perf Global Status MSR bit definitions Zide Chen
2026-11-12 20:32 ` [PATCH v4 03/21] KVM: x86/pmu: Rename all_valid_pmc_idx to pmc_exists Zide Chen
2026-11-12 20:32 ` [PATCH v4 04/21] KVM: x86/pmu: Rename reserved_bits to eventsel_rsvd in kvm_pmu Zide Chen
2026-11-12 20:32 ` [PATCH v4 05/21] KVM: x86/pmu: Use pmc_exists in PMC lookup helpers Zide Chen
2026-11-14 18:53 ` Yosry Ahmed [this message]
2026-11-12 20:32 ` [PATCH v4 06/21] KVM: x86/pmu: Drop nr_arch_{gp,fixed}_counters from kvm_pmu Zide Chen
2026-11-12 20:32 ` [PATCH v4 07/21] KVM: x86/pmu: Expose kvm_host_pmu to vendor modules Zide Chen
2026-11-12 20:32 ` [PATCH v4 08/21] perf/x86: Plumb counter bitmap from x86_pmu to x86_pmu_cap Zide Chen
2026-11-12 20:32 ` [PATCH v4 09/21] KVM: x86/pmu: Switch to bitmask-based KVM PMU capabilities Zide Chen
2026-11-13 6:40 ` Mi, Dapeng
2026-11-13 18:22 ` Chen, Zide
2026-11-12 20:32 ` [PATCH v4 10/21] perf/x86: Remove num_counters_{gp,fixed} from x86_pmu_capability Zide Chen
2026-11-12 20:32 ` [PATCH v4 11/21] KVM: x86/pmu: Document GLOBAL_STATUS_RESET passthrough erratum Zide Chen
2026-11-12 20:32 ` [PATCH v4 12/21] KVM: x86/pmu: Mark CondChgd reserved in global_status_rsvd Zide Chen
2026-11-12 20:32 ` [PATCH v4 13/21] KVM: x86/pmu: Emulate IA32_PERF_GLOBAL_STATUS_SET MSR Zide Chen
2026-11-12 20:32 ` [PATCH v4 14/21] KVM: x86/pmu: Emulate IA32_PERF_GLOBAL_INUSE MSR Zide Chen
2026-11-12 20:32 ` [PATCH v4 15/21] KVM: x86/pmu: Clamp pmu->version to kvm_pmu_cap.version Zide Chen
2026-11-12 20:32 ` [PATCH v4 16/21] KVM: x86/pmu: Populate CPUID.0AH:ECX fixed-counter bitmap Zide Chen
2026-11-12 20:32 ` [PATCH v4 17/21] KVM: x86/pmu: Factor out fixed counter control bit calculation Zide Chen
2026-11-12 20:32 ` [PATCH v4 18/21] KVM: x86/pmu: Mask only OS/USR bits when filtering fixed counters Zide Chen
2026-11-12 20:32 ` [PATCH v4 19/21] KVM: x86/pmu: Ignore AnyThread bit if CPUID.0AH:EDX[15] is set Zide Chen
2026-11-12 20:32 ` [PATCH v4 20/21] KVM: x86/pmu: Advertise PerfMon version 5 on Intel hosts Zide Chen
2026-11-12 20:32 ` [PATCH v4 21/21] KVM: selftests: Support fixed counters bitmap in pmu_counters_test Zide Chen
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