From: Luwei Kang <luwei.kang@intel.com>
To: x86@kernel.org, linux-kernel@vger.kernel.org, kvm@vger.kernel.org
Cc: peterz@infradead.org, mingo@redhat.com, acme@kernel.org,
mark.rutland@arm.com, alexander.shishkin@linux.intel.com,
jolsa@redhat.com, namhyung@kernel.org, tglx@linutronix.de,
bp@alien8.de, hpa@zytor.com, pbonzini@redhat.com,
sean.j.christopherson@intel.com, vkuznets@redhat.com,
wanpengli@tencent.com, jmattson@google.com, joro@8bytes.org,
pawan.kumar.gupta@linux.intel.com, ak@linux.intel.com,
thomas.lendacky@amd.com, fenghua.yu@intel.com,
kan.liang@linux.intel.com, like.xu@linux.intel.com,
Luwei Kang <luwei.kang@intel.com>
Subject: [PATCH v1 06/11] KVM: x86/pmu: Implement is_pebs_via_ds_supported pmu ops
Date: Fri, 6 Mar 2020 01:57:00 +0800 [thread overview]
Message-ID: <1583431025-19802-7-git-send-email-luwei.kang@intel.com> (raw)
In-Reply-To: <1583431025-19802-1-git-send-email-luwei.kang@intel.com>
PEBS virtualization enabling in KVM guest via DS is only supported on
Icelake server. This patch introduce a new pmu ops is_pebs_via_ds_supported
to check if PEBS feature can be supported in KVM guest.
Originally-by: Andi Kleen <ak@linux.intel.com>
Signed-off-by: Luwei Kang <luwei.kang@intel.com>
Co-developed-by: Kan Liang <kan.liang@linux.intel.com>
Signed-off-by: Kan Liang <kan.liang@linux.intel.com>
Co-developed-by: Like Xu <like.xu@linux.intel.com>
Signed-off-by: Like Xu <like.xu@linux.intel.com>
---
arch/x86/kvm/pmu.h | 1 +
arch/x86/kvm/vmx/pmu_intel.c | 18 ++++++++++++++++++
2 files changed, 19 insertions(+)
diff --git a/arch/x86/kvm/pmu.h b/arch/x86/kvm/pmu.h
index 1333298..476780b 100644
--- a/arch/x86/kvm/pmu.h
+++ b/arch/x86/kvm/pmu.h
@@ -32,6 +32,7 @@ struct kvm_pmu_ops {
struct kvm_pmc *(*msr_idx_to_pmc)(struct kvm_vcpu *vcpu, u32 msr);
int (*is_valid_rdpmc_ecx)(struct kvm_vcpu *vcpu, unsigned int idx);
bool (*is_valid_msr)(struct kvm_vcpu *vcpu, u32 msr);
+ bool (*is_pebs_via_ds_supported)(void);
int (*get_msr)(struct kvm_vcpu *vcpu, u32 msr, u64 *data);
int (*set_msr)(struct kvm_vcpu *vcpu, struct msr_data *msr_info);
void (*refresh)(struct kvm_vcpu *vcpu);
diff --git a/arch/x86/kvm/vmx/pmu_intel.c b/arch/x86/kvm/vmx/pmu_intel.c
index ebadc33..a67bd34 100644
--- a/arch/x86/kvm/vmx/pmu_intel.c
+++ b/arch/x86/kvm/vmx/pmu_intel.c
@@ -12,6 +12,7 @@
#include <linux/kvm_host.h>
#include <linux/perf_event.h>
#include <asm/perf_event.h>
+#include <asm/intel-family.h>
#include "x86.h"
#include "cpuid.h"
#include "lapic.h"
@@ -172,6 +173,22 @@ static bool intel_is_valid_msr(struct kvm_vcpu *vcpu, u32 msr)
return ret;
}
+static bool intel_is_pebs_via_ds_supported(void)
+{
+ if (!boot_cpu_has(X86_FEATURE_PEBS))
+ return false;
+
+ switch (boot_cpu_data.x86_model) {
+ case INTEL_FAM6_ICELAKE_D:
+ case INTEL_FAM6_ICELAKE_X:
+ break;
+ default:
+ return false;
+ }
+
+ return true;
+}
+
static struct kvm_pmc *intel_msr_idx_to_pmc(struct kvm_vcpu *vcpu, u32 msr)
{
struct kvm_pmu *pmu = vcpu_to_pmu(vcpu);
@@ -401,6 +418,7 @@ struct kvm_pmu_ops intel_pmu_ops = {
.msr_idx_to_pmc = intel_msr_idx_to_pmc,
.is_valid_rdpmc_ecx = intel_is_valid_rdpmc_ecx,
.is_valid_msr = intel_is_valid_msr,
+ .is_pebs_via_ds_supported = intel_is_pebs_via_ds_supported,
.get_msr = intel_pmu_get_msr,
.set_msr = intel_pmu_set_msr,
.refresh = intel_pmu_refresh,
--
1.8.3.1
next prev parent reply other threads:[~2020-03-05 9:59 UTC|newest]
Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-03-05 17:56 [PATCH v1 00/11] PEBS virtualization enabling via DS Luwei Kang
2020-03-05 16:51 ` Paolo Bonzini
2020-03-05 17:56 ` [PATCH v1 01/11] perf/x86/core: Support KVM to assign a dedicated counter for guest PEBS Luwei Kang
2020-03-06 13:53 ` Peter Zijlstra
2020-03-06 14:42 ` Liang, Kan
2020-03-09 10:04 ` Peter Zijlstra
2020-03-09 13:12 ` Liang, Kan
2020-03-09 15:05 ` Peter Zijlstra
2020-03-09 19:28 ` Liang, Kan
2020-03-12 10:28 ` Kang, Luwei
2020-03-26 14:03 ` Liang, Kan
2020-04-07 12:34 ` Kang, Luwei
2020-06-12 5:28 ` Kang, Luwei
2020-06-19 9:30 ` Kang, Luwei
2020-08-20 3:32 ` Like Xu
2020-03-09 15:44 ` Andi Kleen
2020-03-05 17:56 ` [PATCH v1 02/11] perf/x86/ds: Handle guest PEBS events overflow and inject fake PMI Luwei Kang
2020-03-05 17:56 ` [PATCH v1 03/11] perf/x86: Expose a function to disable auto-reload Luwei Kang
2020-03-05 17:56 ` [PATCH v1 04/11] KVM: x86/pmu: Decouple event enablement from event creation Luwei Kang
2020-03-05 17:56 ` [PATCH v1 05/11] KVM: x86/pmu: Add support to reprogram PEBS event for guest counters Luwei Kang
2020-03-06 16:28 ` kbuild test robot
2020-03-09 0:58 ` Xu, Like
2020-03-05 17:57 ` Luwei Kang [this message]
2020-03-05 17:57 ` [PATCH v1 07/11] KVM: x86/pmu: Expose CPUIDs feature bits PDCM, DS, DTES64 Luwei Kang
2020-03-05 17:57 ` [PATCH v1 08/11] KVM: x86/pmu: PEBS MSRs emulation Luwei Kang
2020-03-05 17:57 ` [PATCH v1 09/11] KVM: x86/pmu: Expose PEBS feature to guest Luwei Kang
2020-03-05 17:57 ` [PATCH v1 10/11] KVM: x86/pmu: Introduce the mask value for fixed counter Luwei Kang
2020-03-05 17:57 ` [PATCH v1 11/11] KVM: x86/pmu: Adaptive PEBS virtualization enabling Luwei Kang
2020-03-05 22:48 ` [PATCH v1 00/11] PEBS virtualization enabling via DS Andi Kleen
2020-03-06 5:37 ` Kang, Luwei
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