1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
|
/* SPDX-License-Identifier: GPL-2.0-only */
/* TODO: Check if this is still correct */
#include <acpi/acpi_pm.h>
#include <acpi/acpigen.h>
#include <arch/cpu.h>
#include <soc/cppc.h>
#include <soc/msr.h>
/*
* version 2 is expected to be the typical use case.
* For now this function 'punts' on version 3 and just
* populates the additional fields with 'unsupported'.
*/
void cpu_init_cppc_config(struct cppc_config *config, u32 version)
{
config->version = version;
config->entries[CPPC_HIGHEST_PERF] = CPPC_REG_MSR(MSR_CPPC_CAPABILITY_1, SHIFT_CPPC_CAPABILITY_1_HIGHEST_PERF, 8);
config->entries[CPPC_NOMINAL_PERF] = CPPC_REG_MSR(MSR_CPPC_CAPABILITY_1, SHIFT_CPPC_CAPABILITY_1_NOMINAL_PERF, 8);
config->entries[CPPC_LOWEST_NONL_PERF] = CPPC_REG_MSR(MSR_CPPC_CAPABILITY_1, SHIFT_CPPC_CAPABILITY_1_LOW_NON_LIN_PERF, 8);
config->entries[CPPC_LOWEST_PERF] = CPPC_REG_MSR(MSR_CPPC_CAPABILITY_1, SHIFT_CPPC_CAPABILITY_1_LOWEST_PERF, 8);
config->entries[CPPC_GUARANTEED_PERF] = CPPC_UNSUPPORTED;
config->entries[CPPC_DESIRED_PERF] = CPPC_REG_MSR(MSR_CPPC_REQUEST, SHIFT_CPPC_REQUEST_DES_PERF, 8);
config->entries[CPPC_MIN_PERF] = CPPC_REG_MSR(MSR_CPPC_REQUEST, SHIFT_CPPC_REQUEST_MIN_PERF, 8);
config->entries[CPPC_MAX_PERF] = CPPC_REG_MSR(MSR_CPPC_REQUEST, SHIFT_CPPC_REQUEST_MAX_PERF, 8);
config->entries[CPPC_PERF_REDUCE_TOLERANCE] = CPPC_UNSUPPORTED;
config->entries[CPPC_TIME_WINDOW] = CPPC_UNSUPPORTED;
config->entries[CPPC_COUNTER_WRAP] = CPPC_UNSUPPORTED;
config->entries[CPPC_REF_PERF_COUNTER] = CPPC_REG_MSR(MSR_MAX_PERFORMANCE_FREQUENCY_CLOCK_COUNT, 0, 64);
config->entries[CPPC_DELIVERED_PERF_COUNTER] = CPPC_REG_MSR(MSR_ACTUAL_PERFORMANCE_FREQUENCY_CLOCK_COUNT, 0, 64);
config->entries[CPPC_PERF_LIMITED] = CPPC_REG_MSR(MSR_CPPC_STATUS, 1, 1);
config->entries[CPPC_ENABLE] = CPPC_REG_MSR(MSR_CPPC_ENABLE, 0, 1);
if (version < 2)
return;
config->entries[CPPC_AUTO_SELECT] = CPPC_UNSUPPORTED;
config->entries[CPPC_AUTO_ACTIVITY_WINDOW] = CPPC_UNSUPPORTED;
config->entries[CPPC_PERF_PREF] = CPPC_REG_MSR(MSR_CPPC_REQUEST, SHIFT_CPPC_REQUEST_ENERGY_PERF_PREF, 8);
config->entries[CPPC_REF_PERF] = CPPC_UNSUPPORTED;
if (version < 3)
return;
config->entries[CPPC_LOWEST_FREQ] = CPPC_UNSUPPORTED;
config->entries[CPPC_NOMINAL_FREQ] = CPPC_UNSUPPORTED;
}
void generate_cppc_entries(unsigned int core_id)
{
/* Generate GCPC package in first logical core */
if (core_id == 0) {
struct cppc_config cppc_config;
cpu_init_cppc_config(&cppc_config, CPPC_VERSION_3);
acpigen_write_CPPC_package(&cppc_config);
}
/* Write _CPC entry for each logical core */
acpigen_write_CPPC_method();
}
|
