Merge tag 'perf-tools-for-v6.17-2025-08-01' of git://git.kernel.org/pub/scm/linux/kernel/git/perf/perf-tools

Pull perf tools updates from Namhyung Kim:
 "Build-ID processing goodies:

     Build-IDs are content based hashes to link regions of memory to ELF
     files in post processing. They have been available in distros for
     quite a while:

       $ file /bin/bash
       /bin/bash: ELF 64-bit LSB pie executable, x86-64, version 1 (SYSV),
       dynamically linked, interpreter /lib64/ld-linux-x86-64.so.2,
       BuildID[sha1]=707a1c670cd72f8e55ffedfbe94ea98901b7ce3a,
       for GNU/Linux 3.2.0, stripped

     It is possible to ask the kernel to get it from mmap executable
     backing storage at time they are being put in place and send it as
     metadata at that moment to have in perf.data.

     Prefer that across the board to speed up 'record' time - it post
     processes the samples to find binaries touched by any samples and
     to save them with build-ID. It can skip reading build-ID in
     userspace if it comes from the kernel.

  perf record:

   * Make --buildid-mmap default.  The kernel can generate MMAP2 events
     with a build-ID from ELF header.  Use that by default instead of using
     inode and device ID to identify binaries.  It also can be disabled
     with --no-buildid-mmap.

   * Use BPF for -u/--uid option to sample processes belong to a user.
     BPF can track user processes more accurately and the existing logic
     often fails to get the list of processes due to race with reading the
     /proc filesystem.

   * Generate PERF_RECORD_BPF_METADATA when it profiles BPF programs and
     they have variables starting with "bpf_metadata_".  This will help to
     identify BPF objects used in the profile.  This has been supported in
     bpftool for some time and allows the recording of metadata such as
     commit hashes, versions, etc, that now gets recorded in perf.data as
     well.

   * Collect list of DSOs touched in the sample callchains as well as in
     the sample itself.  This would increase the processing time at the end
     of record, but can improve the data quality.

  perf stat:

   * Add a new 'drm' pseudo-PMU support like in 'hwmon'.  It can collect
     DRM usage stats using fdinfo in /proc.

     On my Intel laptop, it shows like below:

       $ perf list drm
       ...

       drm:
         drm-active-stolen-system0
              [Total memory active in one or more engines. Unit: drm_i915]
         drm-active-system0
              [Total memory active in one or more engines. Unit: drm_i915]
         drm-engine-capacity-video
              [Engine capacity. Unit: drm_i915]
         drm-engine-copy
              [Utilization in ns. Unit: drm_i915]
         drm-engine-render
              [Utilization in ns. Unit: drm_i915]
         drm-engine-video
              [Utilization in ns. Unit: drm_i915]
         ...

       $ sudo perf stat -a -e drm-engine-render,drm-engine-video,drm-engine-capacity-video sleep 1

        Performance counter stats for 'system wide':

       48,137,316,988,873 ns       drm-engine-render
           34,452,696,746 ns       drm-engine-video
                       20 capacity drm-engine-capacity-video

              1.002086194 seconds time elapsed

  perf list

   * Add description for software events.  The description is in JSON format
     and the event parser now can handle the software events like others
     (for example, it's case-insensitive and subject to wildcard matching).

       $ perf list software

       List of pre-defined events (to be used in -e or -M):

       software:
         alignment-faults
              [Number of kernel handled memory alignment faults. Unit: software]
         bpf-output
              [An event used by BPF programs to write to the perf ring buffer. Unit: software]
         cgroup-switches
              [Number of context switches to a task in a different cgroup. Unit: software]
         context-switches
              [Number of context switches [This event is an alias of cs]. Unit: software]
         cpu-clock
              [Per-CPU high-resolution timer based event. Unit: software]
         cpu-migrations
              [Number of times a process has migrated to a new CPU [This event is an alias of migrations]. Unit: software]
         cs
              [Number of context switches [This event is an alias of context-switches]. Unit: software]
         dummy
              [A placeholder event that doesn't count anything. Unit: software]
         emulation-faults
              [Number of kernel handled unimplemented instruction faults handled through emulation. Unit: software]
         faults
              [Number of page faults [This event is an alias of page-faults]. Unit: software]
         major-faults
              [Number of major page faults. Major faults require I/O to handle. Unit: software]
         migrations
              [Number of times a process has migrated to a new CPU [This event is an alias of cpu-migrations]. Unit: software]
         minor-faults
              [Number of minor page faults. Minor faults don't require I/O to handle. Unit: software]
         page-faults
              [Number of page faults [This event is an alias of faults]. Unit: software]
         task-clock
              [Per-task high-resolution timer based event. Unit: software]

  perf ftrace:

   * Add -e/--events option to perf ftrace latency to measure latency
     between the two events instead of a function.

       $ sudo perf ftrace latency -ab -e i915_request_wait_begin,i915_request_wait_end --hide-empty -- sleep 1
       #   DURATION     |      COUNT | GRAPH                                |
          256 -  512 us |          4 | ######                               |
            2 -    4 ms |          2 | ###                                  |
            4 -    8 ms |         12 | ###################                  |
            8 -   16 ms |         10 | ################                     |

       # statistics  (in usec)
         total time:               194915
           avg time:                 6961
           max time:                12855
           min time:                  373
              count:                   28

   * Add new function graph tracer options (--graph-opts) to display more
     info like arguments and return value.  They will be passed to the
     kernel ftrace directly.

       $ sudo perf ftrace -G vfs_write --graph-opts retval,retaddr
       # tracer: function_graph
       #
       # CPU  DURATION                  FUNCTION CALLS
       # |     |   |                     |   |   |   |
       ...
       5)               |  mutex_unlock() { /* <-rb_simple_write+0xda/0x150 */
       5)   0.188 us    |    local_clock(); /* <-lock_release+0x2ad/0x440 ret=0x3bf2a3cf90e */
       5)               |    rt_mutex_slowunlock() { /* <-rb_simple_write+0xda/0x150 */
       5)               |      _raw_spin_lock_irqsave() { /* <-rt_mutex_slowunlock+0x4f/0x200 */
       5)   0.123 us    |        preempt_count_add(); /* <-_raw_spin_lock_irqsave+0x23/0x90 ret=0x0 */
       5)   0.128 us    |        local_clock(); /* <-__lock_acquire.isra.0+0x17a/0x740 ret=0x3bf2a3cfc8b */
       5)   0.086 us    |        do_raw_spin_trylock(); /* <-_raw_spin_lock_irqsave+0x4a/0x90 ret=0x1 */
       5)   0.845 us    |      } /* _raw_spin_lock_irqsave ret=0x292 */
       ...

  Misc:

   * Add perf archive --exclude-buildids <FILE> option to skip some binaries.
     The format of the FILE should be same as an output of perf buildid-list.

   * Get rid of dependency of libcrypto.  It was just to get SHA-1 hash so
     implement it directly like in the kernel.  A side effect is that it
     needs -fno-strict-aliasing compiler option (again, like in the kernel).

   * Convert all shell script tests to use bash"

* tag 'perf-tools-for-v6.17-2025-08-01' of git://git.kernel.org/pub/scm/linux/kernel/git/perf/perf-tools: (179 commits)
  perf record: Cache build-ID of hit DSOs only
  perf test: Ensure lock contention using pipe mode
  perf python: Stop using deprecated PyUnicode_AsString()
  perf list: Skip ABI PMUs when printing pmu values
  perf list: Remove tracepoint printing code
  perf tp_pmu: Add event APIs
  perf tp_pmu: Factor existing tracepoint logic to new file
  perf parse-events: Remove non-json software events
  perf jevents: Add common software event json
  perf tools: Remove libtraceevent in .gitignore
  perf test: Fix comment ordering
  perf sort: Use perf_env to set arch sort keys and header
  perf test: Move PERF_SAMPLE_WEIGHT_STRUCT parsing to common test
  perf sample: Remove arch notion of sample parsing
  perf env: Remove global perf_env
  perf trace: Avoid global perf_env with evsel__env
  perf auxtrace: Pass perf_env from session through to mmap read
  perf machine: Explicitly pass in host perf_env
  perf bench synthesize: Avoid use of global perf_env
  perf top: Make perf_env locally scoped
  ...

1 files changed, 120 insertions, 14 deletions

diff --git a/tools/perf/util/pmus.c b/tools/perf/util/pmus.c
index 3bbd26fec78a..98be2eb8f1f0 100644
--- a/tools/perf/util/pmus.c
+++ b/tools/perf/util/pmus.c
@@ -12,6 +12,7 @@
 #include <unistd.h>
 #include "cpumap.h"
 #include "debug.h"
+#include "drm_pmu.h"
 #include "evsel.h"
 #include "pmus.h"
 #include "pmu.h"
@@ -19,6 +20,7 @@
 #include "tool_pmu.h"
 #include "print-events.h"
 #include "strbuf.h"
+#include "string2.h"
 
 /*
  * core_pmus:  A PMU belongs to core_pmus if it's name is "cpu" or it's sysfs
@@ -42,16 +44,19 @@ enum perf_tool_pmu_type {
 	PERF_TOOL_PMU_TYPE_PE_OTHER,
 	PERF_TOOL_PMU_TYPE_TOOL,
 	PERF_TOOL_PMU_TYPE_HWMON,
+	PERF_TOOL_PMU_TYPE_DRM,
 
 #define PERF_TOOL_PMU_TYPE_PE_CORE_MASK (1 << PERF_TOOL_PMU_TYPE_PE_CORE)
 #define PERF_TOOL_PMU_TYPE_PE_OTHER_MASK (1 << PERF_TOOL_PMU_TYPE_PE_OTHER)
 #define PERF_TOOL_PMU_TYPE_TOOL_MASK (1 << PERF_TOOL_PMU_TYPE_TOOL)
 #define PERF_TOOL_PMU_TYPE_HWMON_MASK (1 << PERF_TOOL_PMU_TYPE_HWMON)
+#define PERF_TOOL_PMU_TYPE_DRM_MASK (1 << PERF_TOOL_PMU_TYPE_DRM)
 
 #define PERF_TOOL_PMU_TYPE_ALL_MASK (PERF_TOOL_PMU_TYPE_PE_CORE_MASK |	\
 					PERF_TOOL_PMU_TYPE_PE_OTHER_MASK | \
 					PERF_TOOL_PMU_TYPE_TOOL_MASK |	\
-					PERF_TOOL_PMU_TYPE_HWMON_MASK)
+					PERF_TOOL_PMU_TYPE_HWMON_MASK | \
+					PERF_TOOL_PMU_TYPE_DRM_MASK)
 };
 static unsigned int read_pmu_types;
 
@@ -172,6 +177,8 @@ struct perf_pmu *perf_pmus__find(const char *name)
 	/* Looking up an individual perf event PMU failed, check if a tool PMU should be read. */
 	if (!strncmp(name, "hwmon_", 6))
 		to_read_pmus |= PERF_TOOL_PMU_TYPE_HWMON_MASK;
+	else if (!strncmp(name, "drm_", 4))
+		to_read_pmus |= PERF_TOOL_PMU_TYPE_DRM_MASK;
 	else if (!strcmp(name, "tool"))
 		to_read_pmus |= PERF_TOOL_PMU_TYPE_TOOL_MASK;
 
@@ -272,6 +279,10 @@ skip_pe_pmus:
 	    (read_pmu_types & PERF_TOOL_PMU_TYPE_HWMON_MASK) == 0)
 		perf_pmus__read_hwmon_pmus(&other_pmus);
 
+	if ((to_read_types & PERF_TOOL_PMU_TYPE_DRM_MASK) != 0 &&
+	    (read_pmu_types & PERF_TOOL_PMU_TYPE_DRM_MASK) == 0)
+		perf_pmus__read_drm_pmus(&other_pmus);
+
 	list_sort(NULL, &other_pmus, pmus_cmp);
 
 	read_pmu_types |= to_read_types;
@@ -304,6 +315,8 @@ struct perf_pmu *perf_pmus__find_by_type(unsigned int type)
 	if (type >= PERF_PMU_TYPE_PE_START && type <= PERF_PMU_TYPE_PE_END) {
 		to_read_pmus = PERF_TOOL_PMU_TYPE_PE_CORE_MASK |
 			PERF_TOOL_PMU_TYPE_PE_OTHER_MASK;
+	} else if (type >= PERF_PMU_TYPE_DRM_START && type <= PERF_PMU_TYPE_DRM_END) {
+		to_read_pmus = PERF_TOOL_PMU_TYPE_DRM_MASK;
 	} else if (type >= PERF_PMU_TYPE_HWMON_START && type <= PERF_PMU_TYPE_HWMON_END) {
 		to_read_pmus = PERF_TOOL_PMU_TYPE_HWMON_MASK;
 	} else {
@@ -350,6 +363,92 @@ struct perf_pmu *perf_pmus__scan_core(struct perf_pmu *pmu)
 	return NULL;
 }
 
+struct perf_pmu *perf_pmus__scan_for_event(struct perf_pmu *pmu, const char *event)
+{
+	bool use_core_pmus = !pmu || pmu->is_core;
+
+	if (!pmu) {
+		/* Hwmon filename values that aren't used. */
+		enum hwmon_type type;
+		int number;
+		/*
+		 * Core PMUs, other sysfs PMUs and tool PMU can take all event
+		 * types or aren't wother optimizing for.
+		 */
+		unsigned int to_read_pmus =  PERF_TOOL_PMU_TYPE_PE_CORE_MASK |
+			PERF_TOOL_PMU_TYPE_PE_OTHER_MASK |
+			PERF_TOOL_PMU_TYPE_TOOL_MASK;
+
+		/* Could the event be a hwmon event? */
+		if (parse_hwmon_filename(event, &type, &number, /*item=*/NULL, /*alarm=*/NULL))
+			to_read_pmus |= PERF_TOOL_PMU_TYPE_HWMON_MASK;
+
+		/* Could the event be a DRM event? */
+		if (strlen(event) > 4 && strncmp("drm-", event, 4) == 0)
+			to_read_pmus |= PERF_TOOL_PMU_TYPE_DRM_MASK;
+
+		pmu_read_sysfs(to_read_pmus);
+		pmu = list_prepare_entry(pmu, &core_pmus, list);
+	}
+	if (use_core_pmus) {
+		list_for_each_entry_continue(pmu, &core_pmus, list)
+			return pmu;
+
+		pmu = NULL;
+		pmu = list_prepare_entry(pmu, &other_pmus, list);
+	}
+	list_for_each_entry_continue(pmu, &other_pmus, list)
+		return pmu;
+	return NULL;
+}
+
+struct perf_pmu *perf_pmus__scan_matching_wildcard(struct perf_pmu *pmu, const char *wildcard)
+{
+	bool use_core_pmus = !pmu || pmu->is_core;
+
+	if (!pmu) {
+		/*
+		 * Core PMUs, other sysfs PMUs and tool PMU can have any name or
+		 * aren't wother optimizing for.
+		 */
+		unsigned int to_read_pmus =  PERF_TOOL_PMU_TYPE_PE_CORE_MASK |
+			PERF_TOOL_PMU_TYPE_PE_OTHER_MASK |
+			PERF_TOOL_PMU_TYPE_TOOL_MASK;
+
+		/*
+		 * Hwmon PMUs have an alias from a sysfs name like hwmon0,
+		 * hwmon1, etc. or have a name of hwmon_<name>. They therefore
+		 * can only have a wildcard match if the wildcard begins with
+		 * "hwmon". Similarly drm PMUs must start "drm_", avoid reading
+		 * such events unless the PMU could match.
+		 */
+		if (strisglob(wildcard)) {
+			to_read_pmus |= PERF_TOOL_PMU_TYPE_HWMON_MASK |
+				PERF_TOOL_PMU_TYPE_DRM_MASK;
+		} else if (strlen(wildcard) >= 4 && strncmp("drm_", wildcard, 4) == 0) {
+			to_read_pmus |= PERF_TOOL_PMU_TYPE_DRM_MASK;
+		} else if (strlen(wildcard) >= 5 && strncmp("hwmon", wildcard, 5) == 0) {
+			to_read_pmus |= PERF_TOOL_PMU_TYPE_HWMON_MASK;
+		}
+
+		pmu_read_sysfs(to_read_pmus);
+		pmu = list_prepare_entry(pmu, &core_pmus, list);
+	}
+	if (use_core_pmus) {
+		list_for_each_entry_continue(pmu, &core_pmus, list) {
+			if (perf_pmu__wildcard_match(pmu, wildcard))
+				return pmu;
+		}
+		pmu = NULL;
+		pmu = list_prepare_entry(pmu, &other_pmus, list);
+	}
+	list_for_each_entry_continue(pmu, &other_pmus, list) {
+		if (perf_pmu__wildcard_match(pmu, wildcard))
+			return pmu;
+	}
+	return NULL;
+}
+
 static struct perf_pmu *perf_pmus__scan_skip_duplicates(struct perf_pmu *pmu)
 {
 	bool use_core_pmus = !pmu || pmu->is_core;
@@ -546,6 +645,7 @@ void perf_pmus__print_pmu_events(const struct print_callbacks *print_cb, void *p
 		print_cb->print_event(print_state,
 				aliases[j].topic,
 				aliases[j].pmu_name,
+				aliases[j].pmu->type,
 				aliases[j].name,
 				aliases[j].alias,
 				aliases[j].scale_unit,
@@ -650,6 +750,7 @@ void perf_pmus__print_raw_pmu_events(const struct print_callbacks *print_cb, voi
 		print_cb->print_event(print_state,
 				/*topic=*/NULL,
 				/*pmu_name=*/NULL,
+				pmu->type,
 				format_args.short_string.buf,
 				/*event_alias=*/NULL,
 				/*scale_unit=*/NULL,
@@ -715,24 +816,18 @@ bool perf_pmus__supports_extended_type(void)
 	return perf_pmus__do_support_extended_type;
 }
 
-struct perf_pmu *evsel__find_pmu(const struct evsel *evsel)
+struct perf_pmu *perf_pmus__find_by_attr(const struct perf_event_attr *attr)
 {
-	struct perf_pmu *pmu = evsel->pmu;
-	bool legacy_core_type;
-
-	if (pmu)
-		return pmu;
+	struct perf_pmu *pmu = perf_pmus__find_by_type(attr->type);
+	u32 type = attr->type;
+	bool legacy_core_type = type == PERF_TYPE_HARDWARE || type == PERF_TYPE_HW_CACHE;
 
-	pmu = perf_pmus__find_by_type(evsel->core.attr.type);
-	legacy_core_type =
-		evsel->core.attr.type == PERF_TYPE_HARDWARE ||
-		evsel->core.attr.type == PERF_TYPE_HW_CACHE;
 	if (!pmu && legacy_core_type && perf_pmus__supports_extended_type()) {
-		u32 type = evsel->core.attr.config >> PERF_PMU_TYPE_SHIFT;
+		type = attr->config >> PERF_PMU_TYPE_SHIFT;
 
 		pmu = perf_pmus__find_by_type(type);
 	}
-	if (!pmu && (legacy_core_type || evsel->core.attr.type == PERF_TYPE_RAW)) {
+	if (!pmu && (legacy_core_type || type == PERF_TYPE_RAW)) {
 		/*
 		 * For legacy events, if there was no extended type info then
 		 * assume the PMU is the first core PMU.
@@ -743,6 +838,17 @@ struct perf_pmu *evsel__find_pmu(const struct evsel *evsel)
 		 */
 		pmu = perf_pmus__find_core_pmu();
 	}
+	return pmu;
+}
+
+struct perf_pmu *evsel__find_pmu(const struct evsel *evsel)
+{
+	struct perf_pmu *pmu = evsel->pmu;
+
+	if (pmu)
+		return pmu;
+
+	pmu = perf_pmus__find_by_attr(&evsel->core.attr);
 	((struct evsel *)evsel)->pmu = pmu;
 	return pmu;
 }
@@ -762,7 +868,7 @@ struct perf_pmu *perf_pmus__add_test_pmu(int test_sysfs_dirfd, const char *name)
 	return perf_pmu__lookup(&other_pmus, test_sysfs_dirfd, name, /*eager_load=*/true);
 }
 
-struct perf_pmu *perf_pmus__add_test_hwmon_pmu(int hwmon_dir,
+struct perf_pmu *perf_pmus__add_test_hwmon_pmu(const char *hwmon_dir,
 					       const char *sysfs_name,
 					       const char *name)
 {