From: Dapeng Mi <dapeng1.mi@linux.intel.com>
To: Sean Christopherson <seanjc@google.com>,
Paolo Bonzini <pbonzini@redhat.com>
Cc: kvm@vger.kernel.org, linux-kernel@vger.kernel.org,
Jim Mattson <jmattson@google.com>,
Mingwei Zhang <mizhang@google.com>,
Zide Chen <zide.chen@intel.com>,
Das Sandipan <Sandipan.Das@amd.com>,
Shukla Manali <Manali.Shukla@amd.com>,
Xiaoyao Li <xiaoyao.li@intel.com>,
Dapeng Mi <dapeng1.mi@intel.com>,
Dapeng Mi <dapeng1.mi@linux.intel.com>
Subject: [kvm-unit-tests patch v3 5/8] x86/pmu: Relax precise count check for emulated instructions tests
Date: Wed, 3 Sep 2025 14:45:58 +0800 [thread overview]
Message-ID: <20250903064601.32131-6-dapeng1.mi@linux.intel.com> (raw)
In-Reply-To: <20250903064601.32131-1-dapeng1.mi@linux.intel.com>
Relax precise count check for emulated instructions tests on these
platforms with HW overcount issues.
Signed-off-by: Dapeng Mi <dapeng1.mi@linux.intel.com>
---
x86/pmu.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/x86/pmu.c b/x86/pmu.c
index c54c0988..6bf6eee3 100644
--- a/x86/pmu.c
+++ b/x86/pmu.c
@@ -790,7 +790,7 @@ static void check_emulated_instr(void)
// Check that the end count - start count is at least the expected
// number of instructions and branches.
- if (this_cpu_has_perf_global_ctrl()) {
+ if (this_cpu_has_perf_global_ctrl() && !intel_inst_overcount_flags) {
report(instr_cnt.count - instr_start == KVM_FEP_INSNS,
"instruction count");
report(brnch_cnt.count - brnch_start == KVM_FEP_BRANCHES,
--
2.34.1
next prev parent reply other threads:[~2025-09-03 6:47 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-09-03 6:45 [kvm-unit-tests patch v3 0/8] Fix pmu test errors on GNR/SRF/CWF Dapeng Mi
2025-09-03 6:45 ` [kvm-unit-tests patch v3 1/8] x86/pmu: Add helper to detect Intel overcount issues Dapeng Mi
2025-11-20 22:27 ` Sean Christopherson
2025-11-21 1:18 ` Mi, Dapeng
2025-09-03 6:45 ` [kvm-unit-tests patch v3 2/8] x86/pmu: Relax precise count validation for Intel overcounted platforms Dapeng Mi
2025-09-03 6:45 ` [kvm-unit-tests patch v3 3/8] x86/pmu: Fix incorrect masking of fixed counters Dapeng Mi
2025-11-20 22:28 ` Sean Christopherson
2025-11-21 1:25 ` Mi, Dapeng
2025-09-03 6:45 ` [kvm-unit-tests patch v3 4/8] x86/pmu: Handle instruction overcount issue in overflow test Dapeng Mi
2025-09-03 6:45 ` Dapeng Mi [this message]
2025-11-20 22:29 ` [kvm-unit-tests patch v3 5/8] x86/pmu: Relax precise count check for emulated instructions tests Sean Christopherson
2025-11-21 0:53 ` Mi, Dapeng
2025-09-03 6:45 ` [kvm-unit-tests patch v3 6/8] x86/pmu: Expand "llc references" upper limit for broader compatibility Dapeng Mi
2025-09-03 6:46 ` [kvm-unit-tests patch v3 7/8] x86: pmu_pebs: Remove abundant data_cfg_match calculation Dapeng Mi
2025-09-03 6:46 ` [kvm-unit-tests patch v3 8/8] x86: pmu_pebs: Support to validate timed PEBS record on GNR/SRF Dapeng Mi
2025-11-20 22:30 ` [kvm-unit-tests patch v3 0/8] Fix pmu test errors on GNR/SRF/CWF Sean Christopherson
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