linux-kernel - [PATCH v5 5/9] perf/x86/rapl: Add arguments to the cleanup and init functions

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Message-ID: <20240913154801.6446-2-Dhananjay.Ugwekar@amd.com>
Date: Fri, 13 Sep 2024 15:47:57 +0000
From: Dhananjay Ugwekar <Dhananjay.Ugwekar@....com>
To: <peterz@...radead.org>, <mingo@...hat.com>, <acme@...nel.org>,
	<namhyung@...nel.org>, <mark.rutland@....com>,
	<alexander.shishkin@...ux.intel.com>, <jolsa@...nel.org>,
	<irogers@...gle.com>, <adrian.hunter@...el.com>, <kan.liang@...ux.intel.com>,
	<tglx@...utronix.de>, <bp@...en8.de>, <dave.hansen@...ux.intel.com>,
	<x86@...nel.org>, <hpa@...or.com>, <rui.zhang@...el.com>,
	<oleksandr@...alenko.name>
CC: <eranian@...gle.com>, <gautham.shenoy@....com>, <ravi.bangoria@....com>,
	<linux-perf-users@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
	"Dhananjay Ugwekar" <Dhananjay.Ugwekar@....com>
Subject: [PATCH v5 5/9] perf/x86/rapl: Add arguments to the cleanup and init functions

Prep for per-core RAPL PMU addition.

No functional change.

Signed-off-by: Dhananjay Ugwekar <Dhananjay.Ugwekar@....com>
---
 arch/x86/events/rapl.c | 32 +++++++++++++++++++-------------
 1 file changed, 19 insertions(+), 13 deletions(-)

diff --git a/arch/x86/events/rapl.c b/arch/x86/events/rapl.c
index 46a6aeb61541..3bb1da8f96c3 100644
--- a/arch/x86/events/rapl.c
+++ b/arch/x86/events/rapl.c
@@ -597,7 +597,7 @@ static void __init rapl_advertise(void)
 	}
 }
 
-static void cleanup_rapl_pmus(void)
+static void cleanup_rapl_pmus(struct rapl_pmus *rapl_pmus)
 {
 	int i;
 
@@ -615,7 +615,7 @@ static const struct attribute_group *rapl_attr_update[] = {
 	NULL,
 };
 
-static void __init init_rapl_pmu(void)
+static void __init init_rapl_pmu(struct rapl_pmus *rapl_pmus)
 {
 	struct rapl_pmu *rapl_pmu;
 	int cpu, rapl_pmu_idx;
@@ -645,20 +645,22 @@ static void __init init_rapl_pmu(void)
 	cpus_read_unlock();
 }
 
-static int __init init_rapl_pmus(void)
+static int __init init_rapl_pmus(struct rapl_pmus **rapl_pmus_ptr, int rapl_pmu_scope)
 {
-	int nr_rapl_pmu = topology_max_packages() * topology_max_dies_per_package();
-	int rapl_pmu_scope = PERF_PMU_SCOPE_DIE;
+	int nr_rapl_pmu;
+	struct rapl_pmus *rapl_pmus;
 
-	if (rapl_pmu_is_pkg_scope()) {
-		nr_rapl_pmu		= topology_max_packages();
-		rapl_pmu_scope		= PERF_PMU_SCOPE_PKG;
-	}
+	if (rapl_pmu_scope == PERF_PMU_SCOPE_PKG)
+		nr_rapl_pmu	= topology_max_packages();
+	else
+		nr_rapl_pmu	= topology_max_packages() * topology_max_dies_per_package();
 
 	rapl_pmus = kzalloc(struct_size(rapl_pmus, rapl_pmu, nr_rapl_pmu), GFP_KERNEL);
 	if (!rapl_pmus)
 		return -ENOMEM;
 
+	*rapl_pmus_ptr = rapl_pmus;
+
 	rapl_pmus->nr_rapl_pmu		= nr_rapl_pmu;
 	rapl_pmus->pmu.attr_groups	= rapl_attr_groups;
 	rapl_pmus->pmu.attr_update	= rapl_attr_update;
@@ -673,7 +675,7 @@ static int __init init_rapl_pmus(void)
 	rapl_pmus->pmu.module		= THIS_MODULE;
 	rapl_pmus->pmu.capabilities	= PERF_PMU_CAP_NO_EXCLUDE;
 
-	init_rapl_pmu();
+	init_rapl_pmu(rapl_pmus);
 
 	return 0;
 }
@@ -799,8 +801,12 @@ 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 ret;
 
+	if (rapl_pmu_is_pkg_scope())
+		rapl_pmu_scope = PERF_PMU_SCOPE_PKG;
+
 	id = x86_match_cpu(rapl_model_match);
 	if (!id)
 		return -ENODEV;
@@ -816,7 +822,7 @@ static int __init rapl_pmu_init(void)
 	if (ret)
 		return ret;
 
-	ret = init_rapl_pmus();
+	ret = init_rapl_pmus(&rapl_pmus, rapl_pmu_scope);
 	if (ret)
 		return ret;
 
@@ -829,7 +835,7 @@ static int __init rapl_pmu_init(void)
 
 out:
 	pr_warn("Initialization failed (%d), disabled\n", ret);
-	cleanup_rapl_pmus();
+	cleanup_rapl_pmus(rapl_pmus);
 	return ret;
 }
 module_init(rapl_pmu_init);
@@ -837,6 +843,6 @@ module_init(rapl_pmu_init);
 static void __exit intel_rapl_exit(void)
 {
 	perf_pmu_unregister(&rapl_pmus->pmu);
-	cleanup_rapl_pmus();
+	cleanup_rapl_pmus(rapl_pmus);
 }
 module_exit(intel_rapl_exit);
-- 
2.34.1