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ACPI: CPPC: Add three functions related to autonomous selection

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cppc_set_epp() - write energy performance preference register value,
based on ACPI 6.5, s8.4.6.1.7

cppc_get_auto_act_window() - read autonomous activity window register
value, based on ACPI 6.5, s8.4.6.1.6

cppc_set_auto_act_window() - write autonomous activity window register
value, based on ACPI 6.5, s8.4.6.1.6

Reviewed-by: Pierre Gondois <pierre.gondois@arm.com>
Signed-off-by: Lifeng Zheng <zhenglifeng1@huawei.com>
Reviewed-by: Mario Limonciello <mario.limonciello@amd.com>
Link: https://patch.msgid.link/20250411093855.982491-9-zhenglifeng1@huawei.com
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Lifeng Zheng
2025-04-11 17:38:55 +08:00
committed by Rafael J. Wysocki
parent 2605e4ab66
commit f35e5b3ccf
2 changed files with 107 additions and 0 deletions
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24
include/acpi/cppc_acpi.h
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@@ -32,6 +32,15 @@
#define CMD_READ 0
#define CMD_WRITE 1
#define CPPC_AUTO_ACT_WINDOW_SIG_BIT_SIZE (7)
#define CPPC_AUTO_ACT_WINDOW_EXP_BIT_SIZE (3)
#define CPPC_AUTO_ACT_WINDOW_MAX_SIG ((1 << CPPC_AUTO_ACT_WINDOW_SIG_BIT_SIZE) - 1)
#define CPPC_AUTO_ACT_WINDOW_MAX_EXP ((1 << CPPC_AUTO_ACT_WINDOW_EXP_BIT_SIZE) - 1)
/* CPPC_AUTO_ACT_WINDOW_MAX_SIG is 127, so 128 and 129 will decay to 127 when writing */
#define CPPC_AUTO_ACT_WINDOW_SIG_CARRY_THRESH 129
#define CPPC_ENERGY_PERF_MAX (0xFF)
/* Each register has the folowing format. */
struct cpc_reg {
u8 descriptor;
@@ -159,6 +168,9 @@ extern int cpc_read_ffh(int cpunum, struct cpc_reg *reg, u64 *val);
extern int cpc_write_ffh(int cpunum, struct cpc_reg *reg, u64 val);
extern int cppc_get_epp_perf(int cpunum, u64 *epp_perf);
extern int cppc_set_epp_perf(int cpu, struct cppc_perf_ctrls *perf_ctrls, bool enable);
extern int cppc_set_epp(int cpu, u64 epp_val);
extern int cppc_get_auto_act_window(int cpu, u64 *auto_act_window);
extern int cppc_set_auto_act_window(int cpu, u64 auto_act_window);
extern int cppc_get_auto_sel(int cpu, bool *enable);
extern int cppc_set_auto_sel(int cpu, bool enable);
extern int amd_get_highest_perf(unsigned int cpu, u32 *highest_perf);
@@ -229,6 +241,18 @@ static inline int cppc_get_epp_perf(int cpunum, u64 *epp_perf)
{
return -EOPNOTSUPP;
}
static inline int cppc_set_epp(int cpu, u64 epp_val)
{
return -EOPNOTSUPP;
}
static inline int cppc_get_auto_act_window(int cpu, u64 *auto_act_window)
{
return -EOPNOTSUPP;
}
static inline int cppc_set_auto_act_window(int cpu, u64 auto_act_window)
{
return -EOPNOTSUPP;
}
static inline int cppc_get_auto_sel(int cpu, bool *enable)
{
return -EOPNOTSUPP;