arm64: perf: Expose some Armv9 common events under sysfs
authorShaokun Zhang <zhangshaokun@hisilicon.com>
Thu, 3 Mar 2022 08:54:19 +0000 (16:54 +0800)
committerWill Deacon <will@kernel.org>
Tue, 8 Mar 2022 11:40:44 +0000 (11:40 +0000)
commit83f83cc0c1379413fb1199a78f91ab441a7e76fd
treecf4dd36e2641fe857735f3992009debddd7a0a92
parent68fa55f0e05ce371c4b5de7932d9f570d61bf791
arm64: perf: Expose some Armv9 common events under sysfs

Armv9[1] has introduced some common architectural events (0x400C-0x400F)
and common microarchitectural events (0x4010-0x401B), which can be detected
by PMCEID0_EL0 from bit44 to bit59, so expose these common events under
sysfs.

[1] https://developer.arm.com/documentation/ddi0608/ba

Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Will Deacon <will@kernel.org>
Signed-off-by: Shaokun Zhang <zhangshaokun@hisilicon.com>
Link: https://lore.kernel.org/r/20220303085419.64085-1-zhangshaokun@hisilicon.com
Signed-off-by: Will Deacon <will@kernel.org>
arch/arm64/include/asm/perf_event.h
arch/arm64/kernel/perf_event.c