linux-kernel - [kvm-unit-tests Patch 3/5] x86: pmu: Enlarge cnt array length to 64 in check_counters

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Message-Id: <20231024075748.1675382-4-dapeng1.mi@linux.intel.com>
Date:   Tue, 24 Oct 2023 15:57:46 +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,
        Zhenyu Wang <zhenyuw@...ux.intel.com>,
        Zhang Xiong <xiong.y.zhang@...el.com>,
        Jim Mattson <jmattson@...gle.com>,
        Mingwei Zhang <mizhang@...gle.com>,
        Like Xu <like.xu.linux@...il.com>,
        Dapeng Mi <dapeng1.mi@...el.com>,
        Dapeng Mi <dapeng1.mi@...ux.intel.com>
Subject: [kvm-unit-tests Patch 3/5] x86: pmu: Enlarge cnt array length to 64 in check_counters_many()

Considering there are already 8 GP counters and 4 fixed counters on
latest Intel CPUs, like Sapphire Rapids. The original cnt array length
10 is definitely not enough to cover all supported PMU counters on these
new CPUs and it would cause PMU counter validation failures.

It's probably more and more GP and fixed counters are introduced in the
future and then directly extends the cnt array length to 64.

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 7443fdab5c8a..1bebf493d4a4 100644
--- a/x86/pmu.c
+++ b/x86/pmu.c
@@ -254,7 +254,7 @@ static void check_fixed_counters(void)
 
 static void check_counters_many(void)
 {
-	pmu_counter_t cnt[10];
+	pmu_counter_t cnt[64];
 	int i, n;
 
 	for (i = 0, n = 0; n < pmu.nr_gp_counters; i++) {
-- 
2.34.1