perf/x86/rapl: Modify the generic variable names to *_pkg*

Prepare for the addition of RAPL core energy counter support.

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

No functional change.

Signed-off-by: Dhananjay Ugwekar <Dhananjay.Ugwekar@amd.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: "Gautham R. Shenoy" <gautham.shenoy@amd.com>
Reviewed-by: Zhang Rui <rui.zhang@intel.com>
Tested-by: Zhang Rui <rui.zhang@intel.com>
Link: https://lore.kernel.org/r/20241115060805.447565-8-Dhananjay.Ugwekar@amd.com

Author: dhananjay-AMD

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",
@@ -112,7 +112,7 @@ static struct perf_pmu_events_attr event_attr_##v = {				\
  *	     considered as either pkg-scope or die-scope, and we are considering
  *	     them as die-scope.
  */
-#define rapl_pmu_is_pkg_scope()				\
+#define rapl_pkg_pmu_is_pkg_scope()				\
 	(boot_cpu_data.x86_vendor == X86_VENDOR_AMD ||	\
 	 boot_cpu_data.x86_vendor == X86_VENDOR_HYGON)
 
@@ -139,16 +139,16 @@ 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;
@@ -164,8 +164,8 @@ static inline unsigned int get_rapl_pmu_idx(int cpu)
 	 * (for non-existent mappings in topology map) to UINT_MAX, so
 	 * the error check in the caller is simplified.
 	 */
-	return rapl_pmu_is_pkg_scope() ? topology_logical_package_id(cpu) :
-					 topology_logical_die_id(cpu);
+	return rapl_pkg_pmu_is_pkg_scope() ? topology_logical_package_id(cpu) :
+					     topology_logical_die_id(cpu);
 }
 
 static inline u64 rapl_read_counter(struct perf_event *event)
@@ -177,7 +177,7 @@ 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;
 	}
@@ -187,7 +187,7 @@ 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)
@@ -348,7 +348,7 @@ static int rapl_pmu_event_init(struct perf_event *event)
 	unsigned int rapl_pmu_idx;
 
 	/* 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 */
@@ -358,26 +358,26 @@ static int rapl_pmu_event_init(struct perf_event *event)
 	if (event->cpu < 0)
 		return -EINVAL;
 
-	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 */
 	if (event->attr.sample_period) /* no sampling */
 		return -EINVAL;
 
 	rapl_pmu_idx = get_rapl_pmu_idx(event->cpu);
-	if (rapl_pmu_idx >= rapl_pmus->nr_rapl_pmu)
+	if (rapl_pmu_idx >= rapl_pmus_pkg->nr_rapl_pmu)
 		return -EINVAL;
 
 	/* must be done before validate_group */
-	rapl_pmu = rapl_pmus->rapl_pmu[rapl_pmu_idx];
+	rapl_pmu = rapl_pmus_pkg->rapl_pmu[rapl_pmu_idx];
 	if (!rapl_pmu)
 		return -EINVAL;
 
@@ -531,11 +531,11 @@ 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 },
@@ -551,8 +551,8 @@ 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) {
 	/*
@@ -562,11 +562,11 @@ 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;
@@ -581,9 +581,9 @@ 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;
 }
@@ -593,12 +593,12 @@ 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]);
 		}
 	}
 }
@@ -679,71 +679,71 @@ static int __init init_rapl_pmus(struct rapl_pmus **rapl_pmus_ptr, int rapl_pmu_
 }
 
 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 = {
@@ -799,32 +799,32 @@ MODULE_DEVICE_TABLE(x86cpu, rapl_model_match);
 static int __init rapl_pmu_init(void)
 {
 	const struct x86_cpu_id *id;
-	int rapl_pmu_scope = PERF_PMU_SCOPE_DIE;
+	int rapl_pkg_pmu_scope = PERF_PMU_SCOPE_DIE;
 	int ret;
 
-	if (rapl_pmu_is_pkg_scope())
-		rapl_pmu_scope = PERF_PMU_SCOPE_PKG;
+	if (rapl_pkg_pmu_is_pkg_scope())
+		rapl_pkg_pmu_scope = PERF_PMU_SCOPE_PKG;
 
 	id = x86_match_cpu(rapl_model_match);
 	if (!id)
 		return -ENODEV;
 
 	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, rapl_pmu_scope);
+	ret = init_rapl_pmus(&rapl_pmus_pkg, rapl_pkg_pmu_scope);
 	if (ret)
 		return ret;
 
-	ret = perf_pmu_register(&rapl_pmus->pmu, "power", -1);
+	ret = perf_pmu_register(&rapl_pmus_pkg->pmu, "power", -1);
 	if (ret)
 		goto out;
 
@@ -833,14 +833,14 @@ static int __init rapl_pmu_init(void)
 
 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);
 
 static void __exit intel_rapl_exit(void)
 {
-	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);