diff options
| author | Jie Zhan <zhanjie9@hisilicon.com> | 2025-12-23 15:21:17 +0800 |
|---|---|---|
| committer | Viresh Kumar <viresh.kumar@linaro.org> | 2026-01-27 11:21:23 +0530 |
| commit | f9cadb3d56912a70571fdd95f426b757557c465b (patch) | |
| tree | 4d4a6766513a832272b4da918a8dff93c0c8dcc5 /drivers/acpi | |
| parent | e05d9e5c8b754cc7d72acd896f5f7caf6b78a973 (diff) | |
ACPI: CPPC: Factor out and export per-cpu cppc_perf_ctrs_in_pcc_cpu()
Factor out cppc_perf_ctrs_in_pcc_cpu() for checking whether per-cpu CPC
regs are defined in PCC channels, and export it out for further use.
Reviewed-by: Lifeng Zheng <zhenglifeng1@huawei.com>
Reviewed-by: Pierre Gondois <pierre.gondois@arm.com>
Signed-off-by: Jie Zhan <zhanjie9@hisilicon.com>
Acked-by: Rafael J. Wysocki (Intel) <rafael@kernel.org>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Diffstat (limited to 'drivers/acpi')
| -rw-r--r-- | drivers/acpi/cppc_acpi.c | 48 |
1 files changed, 27 insertions, 21 deletions
diff --git a/drivers/acpi/cppc_acpi.c b/drivers/acpi/cppc_acpi.c index 3bdeeee3414e..ec4966aaa8d4 100644 --- a/drivers/acpi/cppc_acpi.c +++ b/drivers/acpi/cppc_acpi.c @@ -1423,6 +1423,32 @@ out_err: EXPORT_SYMBOL_GPL(cppc_get_perf_caps); /** + * cppc_perf_ctrs_in_pcc_cpu - Check if any perf counters of a CPU are in PCC. + * @cpu: CPU on which to check perf counters. + * + * Return: true if any of the counters are in PCC regions, false otherwise + */ +bool cppc_perf_ctrs_in_pcc_cpu(unsigned int cpu) +{ + struct cpc_desc *cpc_desc = per_cpu(cpc_desc_ptr, cpu); + struct cpc_register_resource *ref_perf_reg; + + /* + * If reference perf register is not supported then we should use the + * nominal perf value + */ + ref_perf_reg = &cpc_desc->cpc_regs[REFERENCE_PERF]; + if (!CPC_SUPPORTED(ref_perf_reg)) + ref_perf_reg = &cpc_desc->cpc_regs[NOMINAL_PERF]; + + return CPC_IN_PCC(&cpc_desc->cpc_regs[DELIVERED_CTR]) || + CPC_IN_PCC(&cpc_desc->cpc_regs[REFERENCE_CTR]) || + CPC_IN_PCC(&cpc_desc->cpc_regs[CTR_WRAP_TIME]) || + CPC_IN_PCC(ref_perf_reg); +} +EXPORT_SYMBOL_GPL(cppc_perf_ctrs_in_pcc_cpu); + +/** * cppc_perf_ctrs_in_pcc - Check if any perf counters are in a PCC region. * * CPPC has flexibility about how CPU performance counters are accessed. @@ -1436,27 +1462,7 @@ bool cppc_perf_ctrs_in_pcc(void) int cpu; for_each_online_cpu(cpu) { - struct cpc_register_resource *ref_perf_reg; - struct cpc_desc *cpc_desc; - - cpc_desc = per_cpu(cpc_desc_ptr, cpu); - - if (CPC_IN_PCC(&cpc_desc->cpc_regs[DELIVERED_CTR]) || - CPC_IN_PCC(&cpc_desc->cpc_regs[REFERENCE_CTR]) || - CPC_IN_PCC(&cpc_desc->cpc_regs[CTR_WRAP_TIME])) - return true; - - - ref_perf_reg = &cpc_desc->cpc_regs[REFERENCE_PERF]; - - /* - * If reference perf register is not supported then we should - * use the nominal perf value - */ - if (!CPC_SUPPORTED(ref_perf_reg)) - ref_perf_reg = &cpc_desc->cpc_regs[NOMINAL_PERF]; - - if (CPC_IN_PCC(ref_perf_reg)) + if (cppc_perf_ctrs_in_pcc_cpu(cpu)) return true; } |