[PATCH v1 2/3] cpufreq: intel_pstate: Change intel_pstate_get_hwp_max() argument

Rafael J. Wysocki
2021-01-07T18:45:35Z

From: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

All of the callers of intel_pstate_get_hwp_max() access the struct
cpudata object that corresponds to the given CPU already and the
function itself needs to access that object (in order to update
hwp_cap_cached), so modify the code to pass a struct cpudata pointer
to it instead of the CPU number.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
---
drivers/cpufreq/intel_pstate.c | 16 ++++++++--------
1 file changed, 8 insertions(+), 8 deletions(-)

Index: linux-pm/drivers/cpufreq/intel_pstate.c
===================================================================
--- linux-pm.orig/drivers/cpufreq/intel_pstate.c
+++ linux-pm/drivers/cpufreq/intel_pstate.c
@@ -819,13 +819,13 @@ static struct freq_attr *hwp_cpufreq_att
NULL,
};

-static void intel_pstate_get_hwp_max(unsigned int cpu, int *phy_max,
+static void intel_pstate_get_hwp_max(struct cpudata *cpu, int *phy_max,
int *current_max)
{
u64 cap;

- rdmsrl_on_cpu(cpu, MSR_HWP_CAPABILITIES, &cap);
- WRITE_ONCE(all_cpu_data[cpu]->hwp_cap_cached, cap);
+ rdmsrl_on_cpu(cpu->cpu, MSR_HWP_CAPABILITIES, &cap);
+ WRITE_ONCE(cpu->hwp_cap_cached, cap);
if (global.no_turbo || global.turbo_disabled)
*current_max = HWP_GUARANTEED_PERF(cap);
else
@@ -1213,7 +1213,7 @@ static void update_qos_request(enum freq
continue;

if (hwp_active)
- intel_pstate_get_hwp_max(i, &turbo_max, &max_state);
+ intel_pstate_get_hwp_max(cpu, &turbo_max, &max_state);
else
turbo_max = cpu->pstate.turbo_pstate;

@@ -1723,7 +1723,7 @@ static void intel_pstate_get_cpu_pstates
if (hwp_active && !hwp_mode_bdw) {
unsigned int phy_max, current_max;

- intel_pstate_get_hwp_max(cpu->cpu, &phy_max, &current_max);
+ intel_pstate_get_hwp_max(cpu, &phy_max, &current_max);
cpu->pstate.turbo_freq = phy_max * cpu->pstate.scaling;
cpu->pstate.turbo_pstate = phy_max;
} else {
@@ -2208,7 +2208,7 @@ static void intel_pstate_update_perf_lim
* rather than pure ratios.
*/
if (hwp_active) {
- intel_pstate_get_hwp_max(cpu->cpu, &turbo_max, &max_state);
+ intel_pstate_get_hwp_max(cpu, &turbo_max, &max_state);
} else {
max_state = global.no_turbo || global.turbo_disabled ?
cpu->pstate.max_pstate : cpu->pstate.turbo_pstate;
@@ -2323,7 +2323,7 @@ static void intel_pstate_verify_cpu_poli
if (hwp_active) {
int max_state, turbo_max;

- intel_pstate_get_hwp_max(cpu->cpu, &turbo_max, &max_state);
+ intel_pstate_get_hwp_max(cpu, &turbo_max, &max_state);
max_freq = max_state * cpu->pstate.scaling;
} else {
max_freq = intel_pstate_get_max_freq(cpu);
@@ -2710,7 +2710,7 @@ static int intel_cpufreq_cpu_init(struct
if (hwp_active) {
u64 value;

- intel_pstate_get_hwp_max(policy->cpu, &turbo_max, &max_state);
+ intel_pstate_get_hwp_max(cpu, &turbo_max, &max_state);
policy->transition_delay_us = INTEL_CPUFREQ_TRANSITION_DELAY_HWP;
rdmsrl_on_cpu(cpu->cpu, MSR_HWP_REQUEST, &value);
WRITE_ONCE(cpu->hwp_req_cached, value);