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| author | Shaokun Zhang <zhangshaokun@hisilicon.com> | 2021-06-03 10:15:02 +0300 |
|---|---|---|
| committer | Will Deacon <will@kernel.org> | 2021-06-03 11:53:17 +0300 |
| commit | 281e44f5fd4f82d86a2b86f0592c698f7311a674 (patch) | |
| tree | 88d2fc59d771c6f906d73b8814845bb3d34f8054 /arch/arm64/include/asm/perf_event.h | |
| parent | 0d0f144a8f5f9815a180d16ef7d08b6269016897 (diff) | |
| download | linux-281e44f5fd4f82d86a2b86f0592c698f7311a674.tar.xz | |
arm64: perf: Add more support on caps under sysfs
Armv8.7 has introduced BUS_SLOTS and BUS_WIDTH in PMMIR_EL1 register,
add two entries in caps for bus_slots and bus_width under sysfs. It
will return the true slots and width if the information is available,
otherwise it will return 0.
Cc: Will Deacon <will@kernel.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Robin Murphy <robin.murphy@arm.com>
Signed-off-by: Shaokun Zhang <zhangshaokun@hisilicon.com>
Link: https://lore.kernel.org/r/1622704502-63951-1-git-send-email-zhangshaokun@hisilicon.com
Signed-off-by: Will Deacon <will@kernel.org>
Diffstat (limited to 'arch/arm64/include/asm/perf_event.h')
| -rw-r--r-- | arch/arm64/include/asm/perf_event.h | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/arch/arm64/include/asm/perf_event.h b/arch/arm64/include/asm/perf_event.h index 60731f602d3e..4ef6f19331f9 100644 --- a/arch/arm64/include/asm/perf_event.h +++ b/arch/arm64/include/asm/perf_event.h @@ -239,6 +239,11 @@ /* PMMIR_EL1.SLOTS mask */ #define ARMV8_PMU_SLOTS_MASK 0xff +#define ARMV8_PMU_BUS_SLOTS_SHIFT 8 +#define ARMV8_PMU_BUS_SLOTS_MASK 0xff +#define ARMV8_PMU_BUS_WIDTH_SHIFT 16 +#define ARMV8_PMU_BUS_WIDTH_MASK 0xf + #ifdef CONFIG_PERF_EVENTS struct pt_regs; extern unsigned long perf_instruction_pointer(struct pt_regs *regs); |