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From: Like Xu <like.xu@linux.intel.com>
To: peterz@infradead.org, Sean Christopherson <seanjc@google.com>,
	Paolo Bonzini <pbonzini@redhat.com>
Cc: eranian@google.com, andi@firstfloor.org,
	kan.liang@linux.intel.com, wei.w.wang@intel.com,
	Wanpeng Li <wanpengli@tencent.com>,
	Vitaly Kuznetsov <vkuznets@redhat.com>,
	Jim Mattson <jmattson@google.com>, Joerg Roedel <joro@8bytes.org>,
	kvm@vger.kernel.org, x86@kernel.org,
	linux-kernel@vger.kernel.org, Like Xu <like.xu@linux.intel.com>
Subject: [PATCH v4 01/16] perf/x86/intel: Add x86_pmu.pebs_vmx for Ice Lake Servers
Date: Mon, 29 Mar 2021 13:41:22 +0800	[thread overview]
Message-ID: <20210329054137.120994-2-like.xu@linux.intel.com> (raw)
In-Reply-To: <20210329054137.120994-1-like.xu@linux.intel.com>

The new hardware facility supporting guest PEBS is only available
on Intel Ice Lake Server platforms for now. 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 PBES capability
will be exposed to the guest.

Signed-off-by: Like Xu <like.xu@linux.intel.com>
---
 arch/x86/events/core.c            | 1 +
 arch/x86/events/intel/core.c      | 1 +
 arch/x86/events/perf_event.h      | 3 ++-
 arch/x86/include/asm/perf_event.h | 1 +
 4 files changed, 5 insertions(+), 1 deletion(-)

diff --git a/arch/x86/events/core.c b/arch/x86/events/core.c
index 18df17129695..06bef6ba8a9b 100644
--- a/arch/x86/events/core.c
+++ b/arch/x86/events/core.c
@@ -2776,5 +2776,6 @@ void perf_get_x86_pmu_capability(struct x86_pmu_capability *cap)
 	cap->bit_width_fixed	= x86_pmu.cntval_bits;
 	cap->events_mask	= (unsigned int)x86_pmu.events_maskl;
 	cap->events_mask_len	= x86_pmu.events_mask_len;
+	cap->pebs_vmx		= x86_pmu.pebs_vmx;
 }
 EXPORT_SYMBOL_GPL(perf_get_x86_pmu_capability);
diff --git a/arch/x86/events/intel/core.c b/arch/x86/events/intel/core.c
index 7bbb5bb98d8c..591d60cc8436 100644
--- a/arch/x86/events/intel/core.c
+++ b/arch/x86/events/intel/core.c
@@ -5574,6 +5574,7 @@ __init int intel_pmu_init(void)
 
 	case INTEL_FAM6_ICELAKE_X:
 	case INTEL_FAM6_ICELAKE_D:
+		x86_pmu.pebs_vmx = 1;
 		pmem = true;
 		fallthrough;
 	case INTEL_FAM6_ICELAKE_L:
diff --git a/arch/x86/events/perf_event.h b/arch/x86/events/perf_event.h
index 53b2b5fc23bc..85dc4e1d4514 100644
--- a/arch/x86/events/perf_event.h
+++ b/arch/x86/events/perf_event.h
@@ -729,7 +729,8 @@ struct x86_pmu {
 			pebs_prec_dist		:1,
 			pebs_no_tlb		:1,
 			pebs_no_isolation	:1,
-			pebs_block		:1;
+			pebs_block		:1,
+			pebs_vmx		:1;
 	int		pebs_record_size;
 	int		pebs_buffer_size;
 	int		max_pebs_events;
diff --git a/arch/x86/include/asm/perf_event.h b/arch/x86/include/asm/perf_event.h
index 544f41a179fb..6a6e707905be 100644
--- a/arch/x86/include/asm/perf_event.h
+++ b/arch/x86/include/asm/perf_event.h
@@ -192,6 +192,7 @@ struct x86_pmu_capability {
 	int		bit_width_fixed;
 	unsigned int	events_mask;
 	int		events_mask_len;
+	unsigned int	pebs_vmx	:1;
 };
 
 /*
-- 
2.29.2


  reply	other threads:[~2021-03-29  5:50 UTC|newest]

Thread overview: 46+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-03-29  5:41 [PATCH v4 00/16] KVM: x86/pmu: Add basic support to enable Guest PEBS via DS Like Xu
2021-03-29  5:41 ` Like Xu [this message]
2021-04-06  3:24   ` [PATCH v4 01/16] perf/x86/intel: Add x86_pmu.pebs_vmx for Ice Lake Servers Liuxiangdong (Aven, Cloud Infrastructure Service Product Dept.)
2021-04-06  5:14     ` Xu, Like
2021-04-08  1:40       ` Liuxiangdong (Aven, Cloud Infrastructure Service Product Dept.)
2021-04-09  8:33       ` Liuxiangdong (Aven, Cloud Infrastructure Service Product Dept.)
2021-04-09  8:46         ` Like Xu
2021-04-12 11:26           ` Liuxiangdong (Aven, Cloud Infrastructure Service Product Dept.)
2021-04-12 15:25             ` Andi Kleen
2021-04-14 14:10               ` Liuxiangdong
2021-04-14 14:49           ` Liuxiangdong
2021-04-15  1:38             ` Xu, Like
2021-04-15  2:49               ` Liuxiangdong
2021-04-15  3:23                 ` Like Xu
2021-04-06 12:47     ` Andi Kleen
2021-04-07  3:05       ` Liuxiangdong (Aven, Cloud Infrastructure Service Product Dept.)
2021-04-07 14:32         ` Andi Kleen
2021-03-29  5:41 ` [PATCH v4 02/16] perf/x86/intel: Handle guest PEBS overflow PMI for KVM guest Like Xu
2021-04-06 16:22   ` Peter Zijlstra
2021-04-07  0:47     ` Xu, Like
2021-03-29  5:41 ` [PATCH v4 03/16] perf/x86/core: Pass "struct kvm_pmu *" to determine the guest values Like Xu
2021-03-29  5:41 ` [PATCH v4 04/16] KVM: x86/pmu: Set MSR_IA32_MISC_ENABLE_EMON bit when vPMU is enabled Like Xu
2021-03-29  5:41 ` [PATCH v4 05/16] KVM: x86/pmu: Introduce the ctrl_mask value for fixed counter Like Xu
2021-03-29  5:41 ` [PATCH v4 06/16] KVM: x86/pmu: Reprogram guest PEBS event to emulate guest PEBS counter Like Xu
2021-04-07  8:40   ` Peter Zijlstra
2021-03-29  5:41 ` [PATCH v4 07/16] KVM: x86/pmu: Add IA32_PEBS_ENABLE MSR emulation for extended PEBS Like Xu
2021-04-07  8:56   ` Peter Zijlstra
2021-04-07 15:25   ` Peter Zijlstra
2021-03-29  5:41 ` [PATCH v4 08/16] KVM: x86/pmu: Add IA32_DS_AREA MSR emulation to manage guest DS buffer Like Xu
2021-04-07 15:39   ` Peter Zijlstra
2021-04-08  5:39     ` Xu, Like
2021-04-08  7:52       ` Peter Zijlstra
2021-04-08  8:44         ` Xu, Like
2021-04-09  7:07         ` Xu, Like
2021-04-09  7:59           ` Peter Zijlstra
2021-04-09  8:30             ` Xu, Like
2021-03-29  5:41 ` [PATCH v4 09/16] KVM: x86/pmu: Add PEBS_DATA_CFG MSR emulation to support adaptive PEBS Like Xu
2021-04-07 15:40   ` Peter Zijlstra
2021-03-29  5:41 ` [PATCH v4 10/16] KVM: x86: Set PEBS_UNAVAIL in IA32_MISC_ENABLE when PEBS is enabled Like Xu
2021-03-29  5:41 ` [PATCH v4 11/16] KVM: x86/pmu: Adjust precise_ip to emulate Ice Lake guest PDIR counter Like Xu
2021-03-29  5:41 ` [PATCH v4 12/16] KVM: x86/pmu: Move pmc_speculative_in_use() to arch/x86/kvm/pmu.h Like Xu
2021-03-29  5:41 ` [PATCH v4 13/16] KVM: x86/pmu: Disable guest PEBS before vm-entry in two cases Like Xu
2021-03-29  5:41 ` [PATCH v4 14/16] KVM: x86/pmu: Add kvm_pmu_cap to optimize perf_get_x86_pmu_capability Like Xu
2021-03-29  5:41 ` [PATCH v4 15/16] KVM: x86/cpuid: Refactor host/guest CPU model consistency check Like Xu
2021-03-29  5:41 ` [PATCH v4 16/16] KVM: x86/pmu: Expose CPUIDs feature bits PDCM, DS, DTES64 Like Xu
2021-04-06  3:19 ` [PATCH v4 00/16] KVM: x86/pmu: Add basic support to enable Guest PEBS via DS Xu, Like

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