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Message-Id: <20241029152420.3251097-1-arnd@kernel.org>
Date: Tue, 29 Oct 2024 15:24:10 +0000
From: Arnd Bergmann <arnd@...nel.org>
To: Will Deacon <will@...nel.org>,
Mark Rutland <mark.rutland@....com>,
"Rob Herring (Arm)" <robh@...nel.org>
Cc: Arnd Bergmann <arnd@...db.de>,
James Clark <james.clark@...aro.org>,
Anshuman Khandual <anshuman.khandual@....com>,
Ilkka Koskinen <ilkka@...amperecomputing.com>,
linux-arm-kernel@...ts.infradead.org,
linux-kernel@...r.kernel.org
Subject: [PATCH] perf/arm_pmuv3: fix building on 32-bit
From: Arnd Bergmann <arnd@...db.de>
The write_pmuacr() function is only defined on arm64, so building the
driver on 32-bit arm now fails:
drivers/perf/arm_pmuv3.c: In function 'armv8pmu_enable_user_access':
drivers/perf/arm_pmuv3.c:784:17: error: implicit declaration of function 'write_pmuacr'; did you mean 'write_pmcr'? [-Wimplicit-function-declaration]
Add a compile-time check around the newly added code, as it is never
needed on arm32.
Fixes: 0bbff9ed8165 ("perf/arm_pmuv3: Add PMUv3.9 per counter EL0 access control")
Signed-off-by: Arnd Bergmann <arnd@...db.de>
---
drivers/perf/arm_pmuv3.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/drivers/perf/arm_pmuv3.c b/drivers/perf/arm_pmuv3.c
index b6315ce71f19..e67918e0bbda 100644
--- a/drivers/perf/arm_pmuv3.c
+++ b/drivers/perf/arm_pmuv3.c
@@ -775,6 +775,7 @@ static void armv8pmu_enable_user_access(struct arm_pmu *cpu_pmu)
int i;
struct pmu_hw_events *cpuc = this_cpu_ptr(cpu_pmu->hw_events);
+#ifdef CONFIG_ARM64
if (is_pmuv3p9(cpu_pmu->pmuver)) {
u64 mask = 0;
for_each_set_bit(i, cpuc->used_mask, ARMPMU_MAX_HWEVENTS) {
@@ -782,7 +783,9 @@ static void armv8pmu_enable_user_access(struct arm_pmu *cpu_pmu)
mask |= BIT(i);
}
write_pmuacr(mask);
- } else {
+ } else
+#endif
+ {
/* Clear any unused counters to avoid leaking their contents */
for_each_andnot_bit(i, cpu_pmu->cntr_mask, cpuc->used_mask,
ARMPMU_MAX_HWEVENTS) {
--
2.39.5
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