linux-kernel - [kvm-unit-tests patch v3 5/8] x86/pmu: Relax precise count check for emulated instructions tests

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Message-Id: <20250903064601.32131-6-dapeng1.mi@linux.intel.com>
Date: Wed,  3 Sep 2025 14:45:58 +0800
From: Dapeng Mi <dapeng1.mi@...ux.intel.com>
To: Sean Christopherson <seanjc@...gle.com>,
	Paolo Bonzini <pbonzini@...hat.com>
Cc: kvm@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Jim Mattson <jmattson@...gle.com>,
	Mingwei Zhang <mizhang@...gle.com>,
	Zide Chen <zide.chen@...el.com>,
	Das Sandipan <Sandipan.Das@....com>,
	Shukla Manali <Manali.Shukla@....com>,
	Xiaoyao Li <xiaoyao.li@...el.com>,
	Dapeng Mi <dapeng1.mi@...el.com>,
	Dapeng Mi <dapeng1.mi@...ux.intel.com>
Subject: [kvm-unit-tests patch v3 5/8] x86/pmu: Relax precise count check for emulated instructions tests

Relax precise count check for emulated instructions tests on these
platforms with HW overcount issues.

Signed-off-by: Dapeng Mi <dapeng1.mi@...ux.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