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From: Zide Chen <zide.chen@intel.com>
To: Sean Christopherson <seanjc@google.com>,
	Paolo Bonzini <pbonzini@redhat.com>,
	Peter Zijlstra <peterz@infradead.org>
Cc: kvm@vger.kernel.org, Jim Mattson <jmattson@google.com>,
	Yosry Ahmed <yosry@kernel.org>, Andi Kleen <ak@linux.intel.com>,
	Stephane Eranian <eranian@google.com>,
	linux-kernel@vger.kernel.org, Mingwei Zhang <mizhang@google.com>,
	Zide Chen <zide.chen@intel.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: [PATCH v3 09/18] perf/x86: Remove num_counters_{gp,fixed} from x86_pmu_capability
Date: Thu,  5 Nov 2026 18:39:18 -0700	[thread overview]
Message-ID: <20261106013927.166209-10-zide.chen@intel.com> (raw)
In-Reply-To: <20261106013927.166209-1-zide.chen@intel.com>

From: Dapeng Mi <dapeng1.mi@linux.intel.com>

Now that KVM has switched to bitmap-based PMU capabilities,
num_counters_{gp,fixed} can be removed from x86_pmu_capability.

Signed-off-by: Dapeng Mi <dapeng1.mi@linux.intel.com>
Signed-off-by: Zide Chen <zide.chen@intel.com>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Jim Mattson <jmattson@google.com>
---
 arch/x86/events/core.c            | 2 --
 arch/x86/include/asm/perf_event.h | 2 --
 2 files changed, 4 deletions(-)

diff --git a/arch/x86/events/core.c b/arch/x86/events/core.c
index a9b86cecbc78..990d3be5a07f 100644
--- a/arch/x86/events/core.c
+++ b/arch/x86/events/core.c
@@ -3156,8 +3156,6 @@ void perf_get_x86_pmu_capability(struct x86_pmu_capability *cap)
 	 * base PMU holds the correct number of counters for P-cores.
 	 */
 	cap->version		= x86_pmu.version;
-	cap->num_counters_gp	= x86_pmu_num_counters(NULL);
-	cap->num_counters_fixed	= x86_pmu_num_counters_fixed(NULL);
 	cap->cntr_mask64	= x86_pmu.cntr_mask64;
 	cap->fixed_cntr_mask64	= x86_pmu.fixed_cntr_mask64;
 	cap->bit_width_gp	= cap->cntr_mask64 ? x86_pmu.cntval_bits : 0;
diff --git a/arch/x86/include/asm/perf_event.h b/arch/x86/include/asm/perf_event.h
index 190fda412a61..17b0bc7dfce7 100644
--- a/arch/x86/include/asm/perf_event.h
+++ b/arch/x86/include/asm/perf_event.h
@@ -300,8 +300,6 @@ union cpuid_0x80000022_ebx {
 
 struct x86_pmu_capability {
 	int		version;
-	int		num_counters_gp;
-	int		num_counters_fixed;
 	union {
 		u64	cntr_mask64;
 		DECLARE_BITMAP(cntr_mask, X86_PMC_IDX_MAX);
-- 
2.56.0


  parent reply	other threads:[~2026-11-06  1:50 UTC|newest]

Thread overview: 19+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2026-11-06  1:39 [PATCH v3 00/18] KVM: x86/pmu: Add mediated vPMU PerfMon v5 support Zide Chen
2026-11-06  1:39 ` [PATCH v3 01/18] KVM: x86/pmu: Remove redundant Perf Global Status MSR bit definitions Zide Chen
2026-11-06  1:39 ` [PATCH v3 02/18] KVM: x86/pmu: Rename all_valid_pmc_idx to pmc_exists Zide Chen
2026-11-06  1:39 ` [PATCH v3 03/18] KVM: x86/pmu: Rename reserved_bits to eventsel_rsvd in kvm_pmu Zide Chen
2026-11-06  1:39 ` [PATCH v3 04/18] KVM: x86/pmu: Add PMC bitmap accessor helpers Zide Chen
2026-11-06  1:39 ` [PATCH v3 05/18] KVM: x86/pmu: Drop nr_arch_{gp,fixed}_counters from kvm_pmu Zide Chen
2026-11-06  1:39 ` [PATCH v3 06/18] KVM: x86/pmu: Expose kvm_host_pmu to vendor modules Zide Chen
2026-11-06  1:39 ` [PATCH v3 07/18] perf/x86: Plumb counter bitmap from x86_pmu to x86_pmu_cap Zide Chen
2026-11-06  1:39 ` [PATCH v3 08/18] KVM: x86/pmu: Switch to bitmask-based KVM PMU capabilities Zide Chen
2026-11-06  1:39 ` Zide Chen [this message]
2026-11-06  1:39 ` [PATCH v3 10/18] KVM: x86/pmu: Document GLOBAL_STATUS_RESET passthrough erratum Zide Chen
2026-11-06  1:39 ` [PATCH v3 11/18] KVM: x86/pmu: Emulate IA32_PERF_GLOBAL_STATUS_SET MSR Zide Chen
2026-11-06  1:39 ` [PATCH v3 12/18] KVM: x86/pmu: Emulate IA32_PERF_GLOBAL_INUSE MSR Zide Chen
2026-11-06  1:39 ` [PATCH v3 13/18] KVM: x86/pmu: Populate CPUID.0AH:ECX fixed-counter bitmap Zide Chen
2026-11-06  1:39 ` [PATCH v3 14/18] KVM: x86/pmu: Factor out fixed counter control bit calculation Zide Chen
2026-11-06  1:39 ` [PATCH v3 15/18] KVM: x86/pmu: Mask only OS/USR bits when filtering fixed counters Zide Chen
2026-11-06  1:39 ` [PATCH v3 16/18] KVM: x86/pmu: Ignore AnyThread bit if CPUID.0AH:EDX[15] is set Zide Chen
2026-11-06  1:39 ` [PATCH v3 17/18] KVM: x86/pmu: Advertise PerfMon version 5 on Intel hosts Zide Chen
2026-11-06  1:39 ` [PATCH v3 18/18] KVM: selftests: Support fixed counters bitmap in pmu_counters_test Zide Chen

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