linux-kernel - [tip: perf/core] perf/x86/rapl: Move the cntr_mask to rapl

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Message-ID: <173313805375.412.7960428992846054434.tip-bot2@tip-bot2>
Date: Mon, 02 Dec 2024 11:14:13 -0000
From: "tip-bot2 for Dhananjay Ugwekar" <tip-bot2@...utronix.de>
To: linux-tip-commits@...r.kernel.org
Cc: Dhananjay Ugwekar <Dhananjay.Ugwekar@....com>,
 "Peter Zijlstra (Intel)" <peterz@...radead.org>,
 "Gautham R. Shenoy" <gautham.shenoy@....com>, Zhang Rui <rui.zhang@...el.com>,
 x86@...nel.org, linux-kernel@...r.kernel.org
Subject:
 [tip: perf/core] perf/x86/rapl: Move the cntr_mask to rapl_pmus struct

The following commit has been merged into the perf/core branch of tip:

Commit-ID:     54d2759778c1ebd66ee42fac93acf0c2cbf4217c
Gitweb:        https://git.kernel.org/tip/54d2759778c1ebd66ee42fac93acf0c2cbf4217c
Author:        Dhananjay Ugwekar <Dhananjay.Ugwekar@....com>
AuthorDate:    Fri, 15 Nov 2024 06:08:05 
Committer:     Peter Zijlstra <peterz@...radead.org>
CommitterDate: Mon, 02 Dec 2024 12:01:37 +01:00

perf/x86/rapl: Move the cntr_mask to rapl_pmus struct

Prepare for the addition of RAPL core energy counter support.

Move cntr_mask to rapl_pmus struct instead of adding a new global
cntr_mask for the new RAPL power_core PMU. This will also ensure that
the second "core_cntr_mask" is only created if needed (i.e. in case of
AMD CPUs).

Signed-off-by: Dhananjay Ugwekar <Dhananjay.Ugwekar@....com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@...radead.org>
Reviewed-by: "Gautham R. Shenoy" <gautham.shenoy@....com>
Reviewed-by: Zhang Rui <rui.zhang@...el.com>
Tested-by: Zhang Rui <rui.zhang@...el.com>
Link: https://lore.kernel.org/r/20241115060805.447565-10-Dhananjay.Ugwekar@amd.com
---
 arch/x86/events/rapl.c | 15 ++++++++-------
 1 file changed, 8 insertions(+), 7 deletions(-)

diff --git a/arch/x86/events/rapl.c b/arch/x86/events/rapl.c
index aef2d0e..139c308 100644
--- a/arch/x86/events/rapl.c
+++ b/arch/x86/events/rapl.c
@@ -129,6 +129,7 @@ struct rapl_pmu {
 struct rapl_pmus {
 	struct pmu		pmu;
 	unsigned int		nr_rapl_pmu;
+	unsigned int		cntr_mask;
 	struct rapl_pmu		*rapl_pmu[] __counted_by(nr_rapl_pmu);
 };
 
@@ -148,7 +149,6 @@ struct rapl_model {
  /* 1/2^hw_unit Joule */
 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 rapl_model *rapl_model;
 
@@ -364,7 +364,7 @@ static int rapl_pmu_event_init(struct perf_event *event)
 	bit = cfg - 1;
 
 	/* check event supported */
-	if (!(rapl_pkg_cntr_mask & (1 << bit)))
+	if (!(rapl_pmus_pkg->cntr_mask & (1 << bit)))
 		return -EINVAL;
 
 	/* unsupported modes and filters */
@@ -592,10 +592,10 @@ 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_pkg_cntr_mask), rapl_timer_ms);
+		hweight32(rapl_pmus_pkg->cntr_mask), rapl_timer_ms);
 
 	for (i = 0; i < NR_RAPL_PKG_DOMAINS; i++) {
-		if (rapl_pkg_cntr_mask & (1 << i)) {
+		if (rapl_pmus_pkg->cntr_mask & (1 << i)) {
 			pr_info("hw unit of domain %s 2^-%d Joules\n",
 				rapl_pkg_domain_names[i], rapl_pkg_hw_unit[i]);
 		}
@@ -810,9 +810,6 @@ static int __init rapl_pmu_init(void)
 
 	rapl_model = (struct rapl_model *) id->driver_data;
 
-	rapl_pkg_cntr_mask = perf_msr_probe(rapl_model->rapl_pkg_msrs, PERF_RAPL_PKG_EVENTS_MAX,
-					false, (void *) &rapl_model->pkg_events);
-
 	ret = rapl_check_hw_unit();
 	if (ret)
 		return ret;
@@ -821,6 +818,10 @@ static int __init rapl_pmu_init(void)
 	if (ret)
 		return ret;
 
+	rapl_pmus_pkg->cntr_mask = perf_msr_probe(rapl_model->rapl_pkg_msrs,
+						  PERF_RAPL_PKG_EVENTS_MAX, false,
+						  (void *) &rapl_model->pkg_events);
+
 	ret = perf_pmu_register(&rapl_pmus_pkg->pmu, "power", -1);
 	if (ret)
 		goto out;