[PATCH v4 08/11] perf/x86/rapl: Modify the generic variable names to *_pkg*

Dhananjay Ugwekar
2024-07-11T10:30:14Z

Prep for addition of power_per_core PMU to handle core scope energy
consumption for AMD CPUs.

Replace the generic names with *_pkg*, to differentiate between the
scopes of the two different PMUs and their variables.

No functional change.

Signed-off-by: Dhananjay Ugwekar <Dhananjay.Ugwekar@amd.com>
---
Changes in v4:
* Move some renaming code from patch 10 to here (Rui)
---
arch/x86/events/rapl.c | 113 +++++++++++++++++++++--------------------
1 file changed, 57 insertions(+), 56 deletions(-)

diff --git a/arch/x86/events/rapl.c b/arch/x86/events/rapl.c
index 362e82284ccb..9beded3d4a14 100644
--- a/arch/x86/events/rapl.c
+++ b/arch/x86/events/rapl.c
@@ -70,18 +70,18 @@ MODULE_LICENSE("GPL");
/*
* RAPL energy status counters
*/
-enum perf_rapl_events {
+enum perf_rapl_pkg_events {
PERF_RAPL_PP0 = 0, /* all cores */
PERF_RAPL_PKG, /* entire package */
PERF_RAPL_RAM, /* DRAM */
PERF_RAPL_PP1, /* gpu */
PERF_RAPL_PSYS, /* psys */

- PERF_RAPL_MAX,
- NR_RAPL_DOMAINS = PERF_RAPL_MAX,
+ PERF_RAPL_PKG_EVENTS_MAX,
+ NR_RAPL_PKG_DOMAINS = PERF_RAPL_PKG_EVENTS_MAX,
};

-static const char *const rapl_domain_names[NR_RAPL_DOMAINS] __initconst = {
+static const char *const rapl_pkg_domain_names[NR_RAPL_PKG_DOMAINS] __initconst = {
"pp0-core",
"package",
"dram",
@@ -134,16 +134,16 @@ enum rapl_unit_quirk {
};

struct rapl_model {
- struct perf_msr *rapl_msrs;
- unsigned long events;
+ struct perf_msr *rapl_pkg_msrs;
+ unsigned long pkg_events;
unsigned int msr_power_unit;
enum rapl_unit_quirk unit_quirk;
};

/* 1/2^hw_unit Joule */
-static int rapl_hw_unit[NR_RAPL_DOMAINS] __read_mostly;
-static struct rapl_pmus *rapl_pmus;
-static unsigned int rapl_cntr_mask;
+static int rapl_pkg_hw_unit[NR_RAPL_PKG_DOMAINS] __read_mostly;
+static struct rapl_pmus *rapl_pmus_pkg;
+static unsigned int rapl_pkg_cntr_mask;
static u64 rapl_timer_ms;
static struct perf_msr *rapl_msrs;
static struct rapl_model *rapl_model;
@@ -172,7 +172,8 @@ static inline struct rapl_pmu *cpu_to_rapl_pmu(unsigned int cpu)
* The unsigned check also catches the '-1' return value for non
* existent mappings in the topology map.
*/
- return rapl_pmu_idx < rapl_pmus->nr_rapl_pmu ? rapl_pmus->rapl_pmu[rapl_pmu_idx] : NULL;
+ return rapl_pmu_idx < rapl_pmus_pkg->nr_rapl_pmu ?
+ rapl_pmus_pkg->rapl_pmu[rapl_pmu_idx] : NULL;
}

static inline u64 rapl_read_counter(struct perf_event *event)
@@ -184,7 +185,7 @@ static inline u64 rapl_read_counter(struct perf_event *event)

static inline u64 rapl_scale(u64 v, int cfg)
{
- if (cfg > NR_RAPL_DOMAINS) {
+ if (cfg > NR_RAPL_PKG_DOMAINS) {
pr_warn("Invalid domain %d, failed to scale data\n", cfg);
return v;
}
@@ -194,7 +195,7 @@ static inline u64 rapl_scale(u64 v, int cfg)
* or use ldexp(count, -32).
* Watts = Joules/Time delta
*/
- return v << (32 - rapl_hw_unit[cfg - 1]);
+ return v << (32 - rapl_pkg_hw_unit[cfg - 1]);
}

static u64 rapl_event_update(struct perf_event *event)
@@ -354,7 +355,7 @@ static int rapl_pmu_event_init(struct perf_event *event)
struct rapl_pmu *rapl_pmu;

/* only look at RAPL events */
- if (event->attr.type != rapl_pmus->pmu.type)
+ if (event->attr.type != rapl_pmus_pkg->pmu.type)
return -ENOENT;

/* check only supported bits are set */
@@ -366,14 +367,14 @@ static int rapl_pmu_event_init(struct perf_event *event)

event->event_caps |= PERF_EV_CAP_READ_ACTIVE_PKG;

- if (!cfg || cfg >= NR_RAPL_DOMAINS + 1)
+ if (!cfg || cfg >= NR_RAPL_PKG_DOMAINS + 1)
return -EINVAL;

- cfg = array_index_nospec((long)cfg, NR_RAPL_DOMAINS + 1);
+ cfg = array_index_nospec((long)cfg, NR_RAPL_PKG_DOMAINS + 1);
bit = cfg - 1;

/* check event supported */
- if (!(rapl_cntr_mask & (1 << bit)))
+ if (!(rapl_pkg_cntr_mask & (1 << bit)))
return -EINVAL;

/* unsupported modes and filters */
@@ -401,7 +402,7 @@ static void rapl_pmu_event_read(struct perf_event *event)
static ssize_t rapl_get_attr_cpumask(struct device *dev,
struct device_attribute *attr, char *buf)
{
- return cpumap_print_to_pagebuf(true, buf, rapl_pmus->cpumask);
+ return cpumap_print_to_pagebuf(true, buf, rapl_pmus_pkg->cpumask);
}

static DEVICE_ATTR(cpumask, S_IRUGO, rapl_get_attr_cpumask, NULL);
@@ -553,11 +554,11 @@ static struct perf_msr intel_rapl_spr_msrs[] = {
};

/*
- * Force to PERF_RAPL_MAX size due to:
- * - perf_msr_probe(PERF_RAPL_MAX)
+ * Force to PERF_RAPL_PKG_EVENTS_MAX size due to:
+ * - perf_msr_probe(PERF_RAPL_PKG_EVENTS_MAX)
* - want to use same event codes across both architectures
*/
-static struct perf_msr amd_rapl_msrs[] = {
+static struct perf_msr amd_rapl_pkg_msrs[] = {
[PERF_RAPL_PP0] = { 0, &rapl_events_cores_group, NULL, false, 0 },
[PERF_RAPL_PKG] = { MSR_AMD_PKG_ENERGY_STATUS, &rapl_events_pkg_group, test_msr, false, RAPL_MSR_MASK },
[PERF_RAPL_RAM] = { 0, &rapl_events_ram_group, NULL, false, 0 },
@@ -590,7 +591,7 @@ static int __rapl_cpu_offline(struct rapl_pmus *rapl_pmus, unsigned int rapl_pmu

static int rapl_cpu_offline(unsigned int cpu)
{
- return __rapl_cpu_offline(rapl_pmus, get_rapl_pmu_idx(cpu),
+ return __rapl_cpu_offline(rapl_pmus_pkg, get_rapl_pmu_idx(cpu),
get_rapl_pmu_cpumask(cpu), cpu);
}

@@ -629,7 +630,7 @@ static int __rapl_cpu_online(struct rapl_pmus *rapl_pmus, unsigned int rapl_pmu_

static int rapl_cpu_online(unsigned int cpu)
{
- return __rapl_cpu_online(rapl_pmus, get_rapl_pmu_idx(cpu),
+ return __rapl_cpu_online(rapl_pmus_pkg, get_rapl_pmu_idx(cpu),
get_rapl_pmu_cpumask(cpu), cpu);
}

@@ -642,8 +643,8 @@ static int rapl_check_hw_unit(void)
/* protect rdmsrl() to handle virtualization */
if (rdmsrl_safe(rapl_model->msr_power_unit, &msr_rapl_power_unit_bits))
return -1;
- for (i = 0; i < NR_RAPL_DOMAINS; i++)
- rapl_hw_unit[i] = (msr_rapl_power_unit_bits >> 8) & 0x1FULL;
+ for (i = 0; i < NR_RAPL_PKG_DOMAINS; i++)
+ rapl_pkg_hw_unit[i] = (msr_rapl_power_unit_bits >> 8) & 0x1FULL;

switch (rapl_model->unit_quirk) {
/*
@@ -653,11 +654,11 @@ static int rapl_check_hw_unit(void)
* of 2. Datasheet, September 2014, Reference Number: 330784-001 "
*/
case RAPL_UNIT_QUIRK_INTEL_HSW:
- rapl_hw_unit[PERF_RAPL_RAM] = 16;
+ rapl_pkg_hw_unit[PERF_RAPL_RAM] = 16;
break;
/* SPR uses a fixed energy unit for Psys domain. */
case RAPL_UNIT_QUIRK_INTEL_SPR:
- rapl_hw_unit[PERF_RAPL_PSYS] = 0;
+ rapl_pkg_hw_unit[PERF_RAPL_PSYS] = 0;
break;
default:
break;
@@ -672,9 +673,9 @@ static int rapl_check_hw_unit(void)
* if hw unit is 32, then we use 2 ms 1/200/2
*/
rapl_timer_ms = 2;
- if (rapl_hw_unit[0] < 32) {
+ if (rapl_pkg_hw_unit[0] < 32) {
rapl_timer_ms = (1000 / (2 * 100));
- rapl_timer_ms *= (1ULL << (32 - rapl_hw_unit[0] - 1));
+ rapl_timer_ms *= (1ULL << (32 - rapl_pkg_hw_unit[0] - 1));
}
return 0;
}
@@ -684,12 +685,12 @@ static void __init rapl_advertise(void)
int i;

pr_info("API unit is 2^-32 Joules, %d fixed counters, %llu ms ovfl timer\n",
- hweight32(rapl_cntr_mask), rapl_timer_ms);
+ hweight32(rapl_pkg_cntr_mask), rapl_timer_ms);

- for (i = 0; i < NR_RAPL_DOMAINS; i++) {
- if (rapl_cntr_mask & (1 << i)) {
+ for (i = 0; i < NR_RAPL_PKG_DOMAINS; i++) {
+ if (rapl_pkg_cntr_mask & (1 << i)) {
pr_info("hw unit of domain %s 2^-%d Joules\n",
- rapl_domain_names[i], rapl_hw_unit[i]);
+ rapl_pkg_domain_names[i], rapl_pkg_hw_unit[i]);
}
}
}
@@ -746,71 +747,71 @@ static int __init init_rapl_pmus(struct rapl_pmus **rapl_pmus_ptr)
}

static struct rapl_model model_snb = {
- .events = BIT(PERF_RAPL_PP0) |
+ .pkg_events = BIT(PERF_RAPL_PP0) |
BIT(PERF_RAPL_PKG) |
BIT(PERF_RAPL_PP1),
.msr_power_unit = MSR_RAPL_POWER_UNIT,
- .rapl_msrs = intel_rapl_msrs,
+ .rapl_pkg_msrs = intel_rapl_msrs,
};

static struct rapl_model model_snbep = {
- .events = BIT(PERF_RAPL_PP0) |
+ .pkg_events = BIT(PERF_RAPL_PP0) |
BIT(PERF_RAPL_PKG) |
BIT(PERF_RAPL_RAM),
.msr_power_unit = MSR_RAPL_POWER_UNIT,
- .rapl_msrs = intel_rapl_msrs,
+ .rapl_pkg_msrs = intel_rapl_msrs,
};

static struct rapl_model model_hsw = {
- .events = BIT(PERF_RAPL_PP0) |
+ .pkg_events = BIT(PERF_RAPL_PP0) |
BIT(PERF_RAPL_PKG) |
BIT(PERF_RAPL_RAM) |
BIT(PERF_RAPL_PP1),
.msr_power_unit = MSR_RAPL_POWER_UNIT,
- .rapl_msrs = intel_rapl_msrs,
+ .rapl_pkg_msrs = intel_rapl_msrs,
};

static struct rapl_model model_hsx = {
- .events = BIT(PERF_RAPL_PP0) |
+ .pkg_events = BIT(PERF_RAPL_PP0) |
BIT(PERF_RAPL_PKG) |
BIT(PERF_RAPL_RAM),
.unit_quirk = RAPL_UNIT_QUIRK_INTEL_HSW,
.msr_power_unit = MSR_RAPL_POWER_UNIT,
- .rapl_msrs = intel_rapl_msrs,
+ .rapl_pkg_msrs = intel_rapl_msrs,
};

static struct rapl_model model_knl = {
- .events = BIT(PERF_RAPL_PKG) |
+ .pkg_events = BIT(PERF_RAPL_PKG) |
BIT(PERF_RAPL_RAM),
.unit_quirk = RAPL_UNIT_QUIRK_INTEL_HSW,
.msr_power_unit = MSR_RAPL_POWER_UNIT,
- .rapl_msrs = intel_rapl_msrs,
+ .rapl_pkg_msrs = intel_rapl_msrs,
};

static struct rapl_model model_skl = {
- .events = BIT(PERF_RAPL_PP0) |
+ .pkg_events = BIT(PERF_RAPL_PP0) |
BIT(PERF_RAPL_PKG) |
BIT(PERF_RAPL_RAM) |
BIT(PERF_RAPL_PP1) |
BIT(PERF_RAPL_PSYS),
.msr_power_unit = MSR_RAPL_POWER_UNIT,
- .rapl_msrs = intel_rapl_msrs,
+ .rapl_pkg_msrs = intel_rapl_msrs,
};

static struct rapl_model model_spr = {
- .events = BIT(PERF_RAPL_PP0) |
+ .pkg_events = BIT(PERF_RAPL_PP0) |
BIT(PERF_RAPL_PKG) |
BIT(PERF_RAPL_RAM) |
BIT(PERF_RAPL_PSYS),
.unit_quirk = RAPL_UNIT_QUIRK_INTEL_SPR,
.msr_power_unit = MSR_RAPL_POWER_UNIT,
- .rapl_msrs = intel_rapl_spr_msrs,
+ .rapl_pkg_msrs = intel_rapl_spr_msrs,
};

static struct rapl_model model_amd_hygon = {
- .events = BIT(PERF_RAPL_PKG),
+ .pkg_events = BIT(PERF_RAPL_PKG),
.msr_power_unit = MSR_AMD_RAPL_POWER_UNIT,
- .rapl_msrs = amd_rapl_msrs,
+ .rapl_pkg_msrs = amd_rapl_pkg_msrs,
};

static const struct x86_cpu_id rapl_model_match[] __initconst = {
@@ -874,16 +875,16 @@ static int __init rapl_pmu_init(void)

rapl_model = (struct rapl_model *) id->driver_data;

- rapl_msrs = rapl_model->rapl_msrs;
+ rapl_msrs = rapl_model->rapl_pkg_msrs;

- rapl_cntr_mask = perf_msr_probe(rapl_msrs, PERF_RAPL_MAX,
- false, (void *) &rapl_model->events);
+ rapl_pkg_cntr_mask = perf_msr_probe(rapl_msrs, PERF_RAPL_PKG_EVENTS_MAX,
+ false, (void *) &rapl_model->pkg_events);

ret = rapl_check_hw_unit();
if (ret)
return ret;

- ret = init_rapl_pmus(&rapl_pmus);
+ ret = init_rapl_pmus(&rapl_pmus_pkg);
if (ret)
return ret;

@@ -896,7 +897,7 @@ static int __init rapl_pmu_init(void)
if (ret)
goto out;

- ret = perf_pmu_register(&rapl_pmus->pmu, "power", -1);
+ ret = perf_pmu_register(&rapl_pmus_pkg->pmu, "power", -1);
if (ret)
goto out1;

@@ -907,7 +908,7 @@ static int __init rapl_pmu_init(void)
cpuhp_remove_state(CPUHP_AP_PERF_X86_RAPL_ONLINE);
out:
pr_warn("Initialization failed (%d), disabled\n", ret);
- cleanup_rapl_pmus(rapl_pmus);
+ cleanup_rapl_pmus(rapl_pmus_pkg);
return ret;
}
module_init(rapl_pmu_init);
@@ -915,7 +916,7 @@ module_init(rapl_pmu_init);
static void __exit intel_rapl_exit(void)
{
cpuhp_remove_state_nocalls(CPUHP_AP_PERF_X86_RAPL_ONLINE);
- perf_pmu_unregister(&rapl_pmus->pmu);
- cleanup_rapl_pmus(rapl_pmus);
+ perf_pmu_unregister(&rapl_pmus_pkg->pmu);
+ cleanup_rapl_pmus(rapl_pmus_pkg);
}
module_exit(intel_rapl_exit);
--
2.34.1