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| author | Ionela Voinescu <ionela.voinescu@arm.com> | 2020-11-06 15:53:32 +0300 |
|---|---|---|
| committer | Catalin Marinas <catalin.marinas@arm.com> | 2020-11-13 23:05:10 +0300 |
| commit | 4b9cf23c179a27659a95c094ace658bb92f146e5 (patch) | |
| tree | 6f58d2c1e5ec88249d376f6af9e0accb39512183 /arch/arm64/include/asm/cpufeature.h | |
| parent | f8394f232b1eab649ce2df5c5f15b0e528c92091 (diff) | |
| download | linux-4b9cf23c179a27659a95c094ace658bb92f146e5.tar.xz | |
arm64: wrap and generalise counter read functions
In preparation for other uses of Activity Monitors (AMU) cycle counters,
place counter read functionality in generic functions that can reused:
read_corecnt() and read_constcnt().
As a result, implement update_freq_counters_refs() to replace
init_cpu_freq_invariance_counters() and both initialise and update
the per-cpu reference variables.
Signed-off-by: Ionela Voinescu <ionela.voinescu@arm.com>
Reviewed-by: Sudeep Holla <sudeep.holla@arm.com>
Cc: Will Deacon <will@kernel.org>
Link: https://lore.kernel.org/r/20201106125334.21570-2-ionela.voinescu@arm.com
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Diffstat (limited to 'arch/arm64/include/asm/cpufeature.h')
| -rw-r--r-- | arch/arm64/include/asm/cpufeature.h | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/arch/arm64/include/asm/cpufeature.h b/arch/arm64/include/asm/cpufeature.h index 97244d4feca9..751bd9d3376b 100644 --- a/arch/arm64/include/asm/cpufeature.h +++ b/arch/arm64/include/asm/cpufeature.h @@ -765,6 +765,11 @@ static inline bool cpu_has_hw_af(void) #ifdef CONFIG_ARM64_AMU_EXTN /* Check whether the cpu supports the Activity Monitors Unit (AMU) */ extern bool cpu_has_amu_feat(int cpu); +#else +static inline bool cpu_has_amu_feat(int cpu) +{ + return false; +} #endif static inline unsigned int get_vmid_bits(u64 mmfr1) |