perf tools: Fix up some comments and code to properly use the event_source bus

commit 0cced76a0276610e86e8b187c09f0e9ef85b9299 upstream.

In sysfs, the perf events are all located in
/sys/bus/event_source/devices/ but some places ended up hard-coding the
location to be at the root of /sys/devices/ which could be very risky as
you do not exactly know what type of device you are accessing in sysfs
at that location.

So fix this all up by properly pointing everything at the bus device
list instead of the root of the sysfs devices/ tree.

Cc: stable <stable@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Reviewed-by: Kan Liang <kan.liang@linux.intel.com>
Link: https://lore.kernel.org/r/2025021955-implant-excavator-179d@gregkh
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

6 files changed, 12 insertions, 12 deletions

diff --git a/tools/perf/Documentation/intel-hybrid.txt b/tools/perf/Documentation/intel-hybrid.txt
index e7a776ad25d7..0379903673a4 100644
--- a/tools/perf/Documentation/intel-hybrid.txt
+++ b/tools/perf/Documentation/intel-hybrid.txt
@@ -8,15 +8,15 @@ Part of events are available on core cpu, part of events are available
 on atom cpu and even part of events are available on both.
 
 Kernel exports two new cpu pmus via sysfs:
-/sys/devices/cpu_core
-/sys/devices/cpu_atom
+/sys/bus/event_source/devices/cpu_core
+/sys/bus/event_source/devices/cpu_atom
 
 The 'cpus' files are created under the directories. For example,
 
-cat /sys/devices/cpu_core/cpus
+cat /sys/bus/event_source/devices/cpu_core/cpus
 0-15
 
-cat /sys/devices/cpu_atom/cpus
+cat /sys/bus/event_source/devices/cpu_atom/cpus
 16-23
 
 It indicates cpu0-cpu15 are core cpus and cpu16-cpu23 are atom cpus.
@@ -60,8 +60,8 @@ can't carry pmu information. So now this type is extended to be PMU aware
 type. The PMU type ID is stored at attr.config[63:32].
 
 PMU type ID is retrieved from sysfs.
-/sys/devices/cpu_atom/type
-/sys/devices/cpu_core/type
+/sys/bus/event_source/devices/cpu_atom/type
+/sys/bus/event_source/devices/cpu_core/type
 
 The new attr.config layout for PERF_TYPE_HARDWARE:
 
diff --git a/tools/perf/Documentation/perf-list.txt b/tools/perf/Documentation/perf-list.txt
index dea005410ec0..ee5d333e2ca9 100644
--- a/tools/perf/Documentation/perf-list.txt
+++ b/tools/perf/Documentation/perf-list.txt
@@ -188,7 +188,7 @@ in the CPU vendor specific documentation.
 
 The available PMUs and their raw parameters can be listed with
 
-  ls /sys/devices/*/format
+  ls /sys/bus/event_source/devices/*/format
 
 For example the raw event "LSD.UOPS" core pmu event above could
 be specified as
diff --git a/tools/perf/arch/x86/util/iostat.c b/tools/perf/arch/x86/util/iostat.c
index df7b5dfcc26a..7ea882ef293a 100644
--- a/tools/perf/arch/x86/util/iostat.c
+++ b/tools/perf/arch/x86/util/iostat.c
@@ -32,7 +32,7 @@
 #define MAX_PATH 1024
 #endif
 
-#define UNCORE_IIO_PMU_PATH	"devices/uncore_iio_%d"
+#define UNCORE_IIO_PMU_PATH	"bus/event_source/devices/uncore_iio_%d"
 #define SYSFS_UNCORE_PMU_PATH	"%s/"UNCORE_IIO_PMU_PATH
 #define PLATFORM_MAPPING_PATH	UNCORE_IIO_PMU_PATH"/die%d"
 
diff --git a/tools/perf/builtin-stat.c b/tools/perf/builtin-stat.c
index 4933efdfee76..628c61397d2d 100644
--- a/tools/perf/builtin-stat.c
+++ b/tools/perf/builtin-stat.c
@@ -96,7 +96,7 @@
 #include <internal/threadmap.h>
 
 #define DEFAULT_SEPARATOR	" "
-#define FREEZE_ON_SMI_PATH	"devices/cpu/freeze_on_smi"
+#define FREEZE_ON_SMI_PATH	"bus/event_source/devices/cpu/freeze_on_smi"
 
 static void print_counters(struct timespec *ts, int argc, const char **argv);
 
diff --git a/tools/perf/util/mem-events.c b/tools/perf/util/mem-events.c
index bf5090f5220b..9c4adfb45f62 100644
--- a/tools/perf/util/mem-events.c
+++ b/tools/perf/util/mem-events.c
@@ -189,7 +189,7 @@ static bool perf_pmu__mem_events_supported(const char *mnt, struct perf_pmu *pmu
 	if (!e->event_name)
 		return true;
 
-	scnprintf(path, PATH_MAX, "%s/devices/%s/events/%s", mnt, pmu->name, e->event_name);
+	scnprintf(path, PATH_MAX, "%s/bus/event_source/devices/%s/events/%s", mnt, pmu->name, e->event_name);
 
 	return !stat(path, &st);
 }
diff --git a/tools/perf/util/pmu.c b/tools/perf/util/pmu.c
index 61bdda01a05a..ed893c3c6ad9 100644
--- a/tools/perf/util/pmu.c
+++ b/tools/perf/util/pmu.c
@@ -33,12 +33,12 @@
 #define UNIT_MAX_LEN	31 /* max length for event unit name */
 
 enum event_source {
-	/* An event loaded from /sys/devices/<pmu>/events. */
+	/* An event loaded from /sys/bus/event_source/devices/<pmu>/events. */
 	EVENT_SRC_SYSFS,
 	/* An event loaded from a CPUID matched json file. */
 	EVENT_SRC_CPU_JSON,
 	/*
-	 * An event loaded from a /sys/devices/<pmu>/identifier matched json
+	 * An event loaded from a /sys/bus/event_source/devices/<pmu>/identifier matched json
 	 * file.
 	 */
 	EVENT_SRC_SYS_JSON,