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ACPI: CPPC: Factor out and export per-cpu cppc_perf_ctrs_in_pcc_cpu()

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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>
This commit is contained in:
Jie Zhan 2025-12-23 15:21:17 +08:00 committed by Viresh Kumar
parent e05d9e5c8b
commit f9cadb3d56
2 changed files with 32 additions and 21 deletions
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48
drivers/acpi/cppc_acpi.c
View File

@ -1422,6 +1422,32 @@ int cppc_get_perf_caps(int cpunum, struct cppc_perf_caps *perf_caps)
}
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.
*
@ -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;
}

5
include/acpi/cppc_acpi.h
View File

@ -154,6 +154,7 @@ extern int cppc_get_perf_ctrs(int cpu, struct cppc_perf_fb_ctrs *perf_fb_ctrs);
extern int cppc_set_perf(int cpu, struct cppc_perf_ctrls *perf_ctrls);
extern int cppc_set_enable(int cpu, bool enable);
extern int cppc_get_perf_caps(int cpu, struct cppc_perf_caps *caps);
extern bool cppc_perf_ctrs_in_pcc_cpu(unsigned int cpu);
extern bool cppc_perf_ctrs_in_pcc(void);
extern unsigned int cppc_perf_to_khz(struct cppc_perf_caps *caps, unsigned int perf);
extern unsigned int cppc_khz_to_perf(struct cppc_perf_caps *caps, unsigned int freq);
@ -204,6 +205,10 @@ static inline int cppc_get_perf_caps(int cpu, struct cppc_perf_caps *caps)
{
return -EOPNOTSUPP;
}
static inline bool cppc_perf_ctrs_in_pcc_cpu(unsigned int cpu)
{
return false;
}
static inline bool cppc_perf_ctrs_in_pcc(void)
{
return false;