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nvidia-oot: cpuidle: Support changes to residency

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Add debugfs files for configuring a states residency. Assumes
all cores share the same cpuidle driver.

Change-Id: If23eeaa631c266646962648eba7851f1e5471ba0
Signed-off-by: Nathan Hartman <nhartman@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/c/linux-nv-oot/+/3331646
Reviewed-by: Ishan Shah <ishah@nvidia.com>
GVS: buildbot_gerritrpt <buildbot_gerritrpt@nvidia.com>
Reviewed-by: svcacv <svcacv@nvidia.com>
Reviewed-by: Jon Hunter <jonathanh@nvidia.com>
This commit is contained in:
Nathan Hartman
2025-04-01 22:17:34 +00:00
committed by Jon Hunter
parent 3137fbd9b4
commit 31594cb465
1 changed files with 25 additions and 0 deletions
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25
drivers/cpuidle/cpuidle-debugfs.c
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@@ -15,6 +15,8 @@
#include <linux/cpumask.h> #include <linux/cpumask.h>
#include <linux/delay.h> #include <linux/delay.h>
#include <linux/smp.h> #include <linux/smp.h>
#include <linux/limits.h>
#include <linux/minmax.h>
#define CREATE_TRACE_POINTS #define CREATE_TRACE_POINTS
#include <trace/events/cpuidle_debugfs_ftrace.h> #include <trace/events/cpuidle_debugfs_ftrace.h>
@@ -198,6 +200,23 @@ static void coordinated_forced_idle_work_func(struct work_struct *work)
} }
} }
static int min_residency_read(void *data, u64 *val)
{
struct cpuidle_state *idle_state = (struct cpuidle_state *) data;
*val = idle_state->target_residency;
return 0;
}
static int min_residency_write(void *data, u64 val)
{
struct cpuidle_state *idle_state = (struct cpuidle_state *) data;
idle_state->target_residency = min_t(u64, val, S64_MAX/1000);
idle_state->target_residency_ns = min_t(u64, val*1000, S64_MAX);
return 0;
}
static int forced_idle_write(void *data, u64 val) static int forced_idle_write(void *data, u64 val)
{ {
struct cpuidle_state *idle_state = (struct cpuidle_state *) data; struct cpuidle_state *idle_state = (struct cpuidle_state *) data;
@@ -297,6 +316,7 @@ DEFINE_SIMPLE_ATTRIBUTE(idle_state_fops, NULL, forced_idle_write, "%llu\n");
DEFINE_SIMPLE_ATTRIBUTE(coordinated_idle_state_fops, NULL, coordinated_forced_idle_write, "%llu\n"); DEFINE_SIMPLE_ATTRIBUTE(coordinated_idle_state_fops, NULL, coordinated_forced_idle_write, "%llu\n");
DEFINE_SIMPLE_ATTRIBUTE(ipi_wake_coordinated_idle_state_fops, NULL, DEFINE_SIMPLE_ATTRIBUTE(ipi_wake_coordinated_idle_state_fops, NULL,
ipi_wake_coordinated_forced_idle_write, "%llu\n"); ipi_wake_coordinated_forced_idle_write, "%llu\n");
DEFINE_SIMPLE_ATTRIBUTE(min_residency_fops, min_residency_read, min_residency_write, "%llu\n");
static const struct file_operations set_ipi_dest_cpumask_fops = { static const struct file_operations set_ipi_dest_cpumask_fops = {
.owner = THIS_MODULE, .owner = THIS_MODULE,
@@ -324,6 +344,8 @@ static int init_debugfs(void)
char coordinated_wake_file[20]; char coordinated_wake_file[20];
/* ipi_wake_coordinated_ (27) + state-name (up to 7) + \0 (1) */ /* ipi_wake_coordinated_ (27) + state-name (up to 7) + \0 (1) */
char ipi_wake_file[35]; char ipi_wake_file[35];
/* min_residency_ (14) + state-name (up to 7) + \0 (1) */
char min_residency_file[22];
cpuidle_debugfs_node = debugfs_create_dir("cpuidle_debug", NULL); cpuidle_debugfs_node = debugfs_create_dir("cpuidle_debug", NULL);
if (!cpuidle_debugfs_node) if (!cpuidle_debugfs_node)
@@ -350,6 +372,7 @@ static int init_debugfs(void)
for (i = 0; i < drv->state_count; i++) { for (i = 0; i < drv->state_count; i++) {
snprintf(coordinated_wake_file, 20, "coordinated_%s", drv->states[i].name); snprintf(coordinated_wake_file, 20, "coordinated_%s", drv->states[i].name);
snprintf(ipi_wake_file, 35, "ipi_wake_coordinated_%s", drv->states[i].name); snprintf(ipi_wake_file, 35, "ipi_wake_coordinated_%s", drv->states[i].name);
snprintf(min_residency_file, 22, "min_residency_%s", drv->states[i].name);
debugfs_create_file(drv->states[i].name, 0200, debugfs_create_file(drv->states[i].name, 0200,
cpuidle_debugfs_node, &(drv->states[i]), &idle_state_fops); cpuidle_debugfs_node, &(drv->states[i]), &idle_state_fops);
debugfs_create_file(coordinated_wake_file, 0200, debugfs_create_file(coordinated_wake_file, 0200,
@@ -357,6 +380,8 @@ static int init_debugfs(void)
debugfs_create_file(ipi_wake_file, 0200, debugfs_create_file(ipi_wake_file, 0200,
coordinated_debugfs_node, &(drv->states[i]), coordinated_debugfs_node, &(drv->states[i]),
&ipi_wake_coordinated_idle_state_fops); &ipi_wake_coordinated_idle_state_fops);
debugfs_create_file(min_residency_file, 0600,
cpuidle_debugfs_node, &(drv->states[i]), &min_residency_fops);
} }
return 0; return 0;