From: James Clark james.clark@arm.com
mainline inclusion from mainline-v6.8-rc1 commit 3115ee021bfb04efde2e96507bfcc1330261a6a1 category: cleanup bugzilla: https://gitee.com/openeuler/kernel/issues/I9Q7QP CVE: NA
Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=...
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FEAT_PMUv3_TH (Armv8.8) adds two new fields to PMEVTYPER, so include them in the mask. These aren't writable on 32 bit kernels as they are in the high part of the register, so only include them for arm64.
It would be difficult to do this statically in the asm header files for each platform without resulting in circular includes or #ifdefs inline in the code. For that reason the ARMV8_PMU_EVTYPE_MASK definition has been removed and the mask is constructed programmatically.
Reviewed-by: Suzuki K Poulose suzuki.poulose@arm.com Reviewed-by: Anshuman Khandual anshuman.khandual@arm.com Signed-off-by: James Clark james.clark@arm.com Link: https://lore.kernel.org/r/20231211161331.1277825-6-james.clark@arm.com Signed-off-by: Will Deacon will@kernel.org Signed-off-by: Junhao He hejunhao3@huawei.com --- drivers/perf/arm_pmuv3.c | 9 ++++++++- include/linux/perf/arm_pmuv3.h | 3 ++- 2 files changed, 10 insertions(+), 2 deletions(-)
diff --git a/drivers/perf/arm_pmuv3.c b/drivers/perf/arm_pmuv3.c index f333bae5e7c7..0aca6eef1404 100644 --- a/drivers/perf/arm_pmuv3.c +++ b/drivers/perf/arm_pmuv3.c @@ -558,8 +558,15 @@ static void armv8pmu_write_counter(struct perf_event *event, u64 value) static void armv8pmu_write_evtype(int idx, u32 val) { u32 counter = ARMV8_IDX_TO_COUNTER(idx); + unsigned long mask = ARMV8_PMU_EVTYPE_EVENT | + ARMV8_PMU_INCLUDE_EL2 | + ARMV8_PMU_EXCLUDE_EL0 | + ARMV8_PMU_EXCLUDE_EL1;
- val &= ARMV8_PMU_EVTYPE_MASK; + if (IS_ENABLED(CONFIG_ARM64)) + mask |= ARMV8_PMU_EVTYPE_TC | ARMV8_PMU_EVTYPE_TH; + + val &= mask; write_pmevtypern(counter, val); }
diff --git a/include/linux/perf/arm_pmuv3.h b/include/linux/perf/arm_pmuv3.h index daa63542242d..91957b3468e9 100644 --- a/include/linux/perf/arm_pmuv3.h +++ b/include/linux/perf/arm_pmuv3.h @@ -233,8 +233,9 @@ /* * PMXEVTYPER: Event selection reg */ -#define ARMV8_PMU_EVTYPE_MASK 0xc800ffff /* Mask for writable bits */ #define ARMV8_PMU_EVTYPE_EVENT GENMASK(15, 0) /* Mask for EVENT bits */ +#define ARMV8_PMU_EVTYPE_TH GENMASK(43, 32) +#define ARMV8_PMU_EVTYPE_TC GENMASK(63, 61)
/* * Event filters for PMUv3