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| author | Ionela Voinescu <ionela.voinescu@arm.com> | 2020-11-06 13:53:32 +0100 |
|---|---|---|
| committer | Catalin Marinas <catalin.marinas@arm.com> | 2020-11-13 21:05:10 +0100 |
| commit | 4b9cf23c179a27659a95c094ace658bb92f146e5 (patch) | |
| tree | 6f58d2c1e5ec88249d376f6af9e0accb39512183 /arch/arm64/kernel/cpufeature.c | |
| parent | Linux 5.10-rc3 (diff) | |
| download | linux-4b9cf23c179a27659a95c094ace658bb92f146e5.tar.xz linux-4b9cf23c179a27659a95c094ace658bb92f146e5.zip | |
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/kernel/cpufeature.c')
| -rw-r--r-- | arch/arm64/kernel/cpufeature.c | 5 |
1 files changed, 1 insertions, 4 deletions
diff --git a/arch/arm64/kernel/cpufeature.c b/arch/arm64/kernel/cpufeature.c index dcc165b3fc04..1142970e985b 100644 --- a/arch/arm64/kernel/cpufeature.c +++ b/arch/arm64/kernel/cpufeature.c @@ -1526,16 +1526,13 @@ bool cpu_has_amu_feat(int cpu) return cpumask_test_cpu(cpu, &amu_cpus); } -/* Initialize the use of AMU counters for frequency invariance */ -extern void init_cpu_freq_invariance_counters(void); - static void cpu_amu_enable(struct arm64_cpu_capabilities const *cap) { if (has_cpuid_feature(cap, SCOPE_LOCAL_CPU)) { pr_info("detected CPU%d: Activity Monitors Unit (AMU)\n", smp_processor_id()); cpumask_set_cpu(smp_processor_id(), &amu_cpus); - init_cpu_freq_invariance_counters(); + update_freq_counters_refs(); } } |