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| author | Leo Yan <leo.yan@arm.com> | 2025-03-04 11:12:34 +0000 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2025-04-10 14:44:30 +0200 |
| commit | 1bbb6c096cad4764a2e25fbd456b001dc5c91859 (patch) | |
| tree | 78137f9166d75bb5bcb7a0b8a937dbc59ed456c8 /tools/perf/util | |
| parent | 58df1edf65a91e6287dbb22225ed52ab0a44b917 (diff) | |
| download | linux-1bbb6c096cad4764a2e25fbd456b001dc5c91859.tar.gz linux-1bbb6c096cad4764a2e25fbd456b001dc5c91859.tar.bz2 linux-1bbb6c096cad4764a2e25fbd456b001dc5c91859.zip | |
perf arm-spe: Fix load-store operation checking
[ Upstream commit e1d47850bbf79a541c9b3bacdd562f5e0112274d ]
The ARM_SPE_OP_LD and ARM_SPE_OP_ST operations are secondary operation
type, they are overlapping with other second level's operation types
belonging to SVE and branch operations. As a result, a non load-store
operation can be parsed for data source and memory sample.
To fix the issue, this commit introduces a is_ldst_op() macro for
checking LDST operation, and apply the checking when synthesize data
source and memory samples.
Fixes: a89dbc9b988f ("perf arm-spe: Set sample's data source field")
Signed-off-by: Leo Yan <leo.yan@arm.com>
Reviewed-by: James Clark <james.clark@linaro.org>
Link: https://lore.kernel.org/r/20250304111240.3378214-7-leo.yan@arm.com
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'tools/perf/util')
| -rw-r--r-- | tools/perf/util/arm-spe.c | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/tools/perf/util/arm-spe.c b/tools/perf/util/arm-spe.c index 12761c39788f..f1365ce69ba0 100644 --- a/tools/perf/util/arm-spe.c +++ b/tools/perf/util/arm-spe.c @@ -37,6 +37,8 @@ #include "../../arch/arm64/include/asm/cputype.h" #define MAX_TIMESTAMP (~0ULL) +#define is_ldst_op(op) (!!((op) & ARM_SPE_OP_LDST)) + struct arm_spe { struct auxtrace auxtrace; struct auxtrace_queues queues; @@ -669,6 +671,10 @@ static u64 arm_spe__synth_data_source(struct arm_spe_queue *speq, { union perf_mem_data_src data_src = { .mem_op = PERF_MEM_OP_NA }; + /* Only synthesize data source for LDST operations */ + if (!is_ldst_op(record->op)) + return 0; + if (record->op & ARM_SPE_OP_LD) data_src.mem_op = PERF_MEM_OP_LOAD; else if (record->op & ARM_SPE_OP_ST) @@ -767,7 +773,7 @@ static int arm_spe_sample(struct arm_spe_queue *speq) * When data_src is zero it means the record is not a memory operation, * skip to synthesize memory sample for this case. */ - if (spe->sample_memory && data_src) { + if (spe->sample_memory && is_ldst_op(record->op)) { err = arm_spe__synth_mem_sample(speq, spe->memory_id, data_src); if (err) return err; |