Merge branch 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull perf updates from Thomas Gleixner:
 "Kernel:
   - Improve kallsyms coverage
   - Add x86 entry trampolines to kcore
   - Fix ARM SPE handling
   - Correct PPC event post processing

  Tools:
   - Make the build system more robust
   - Small fixes and enhancements all over the place
   - Update kernel ABI header copies
   - Preparatory work for converting libtraceevnt to a shared library
   - License cleanups"

* 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (100 commits)
  tools arch: Update arch/x86/lib/memcpy_64.S copy used in 'perf bench mem memcpy'
  tools arch x86: Update tools's copy of cpufeatures.h
  perf python: Fix pyrf_evlist__read_on_cpu() interface
  perf mmap: Store real cpu number in 'struct perf_mmap'
  perf tools: Remove ext from struct kmod_path
  perf tools: Add gzip_is_compressed function
  perf tools: Add lzma_is_compressed function
  perf tools: Add is_compressed callback to compressions array
  perf tools: Move the temp file processing into decompress_kmodule
  perf tools: Use compression id in decompress_kmodule()
  perf tools: Store compression id into struct dso
  perf tools: Add compression id into 'struct kmod_path'
  perf tools: Make is_supported_compression() static
  perf tools: Make decompress_to_file() function static
  perf tools: Get rid of dso__needs_decompress() call in __open_dso()
  perf tools: Get rid of dso__needs_decompress() call in symbol__disassemble()
  perf tools: Get rid of dso__needs_decompress() call in read_object_code()
  tools lib traceevent: Change to SPDX License format
  perf llvm: Allow passing options to llc in addition to clang
  perf parser: Improve error message for PMU address filters
  ...

1 files changed, 30 insertions, 18 deletions

diff --git a/tools/perf/util/bpf-loader.c b/tools/perf/util/bpf-loader.c
index 3d02ae38ec56..47aac41349a2 100644
--- a/tools/perf/util/bpf-loader.c
+++ b/tools/perf/util/bpf-loader.c
@@ -1529,13 +1529,13 @@ int bpf__apply_obj_config(void)
 	bpf_object__for_each_safe(obj, objtmp)	\
 		bpf_map__for_each(pos, obj)
 
-#define bpf__for_each_stdout_map(pos, obj, objtmp)	\
+#define bpf__for_each_map_named(pos, obj, objtmp, name)	\
 	bpf__for_each_map(pos, obj, objtmp) 		\
 		if (bpf_map__name(pos) && 		\
-			(strcmp("__bpf_stdout__", 	\
+			(strcmp(name, 			\
 				bpf_map__name(pos)) == 0))
 
-int bpf__setup_stdout(struct perf_evlist *evlist)
+struct perf_evsel *bpf__setup_output_event(struct perf_evlist *evlist, const char *name)
 {
 	struct bpf_map_priv *tmpl_priv = NULL;
 	struct bpf_object *obj, *tmp;
@@ -1544,11 +1544,11 @@ int bpf__setup_stdout(struct perf_evlist *evlist)
 	int err;
 	bool need_init = false;
 
-	bpf__for_each_stdout_map(map, obj, tmp) {
+	bpf__for_each_map_named(map, obj, tmp, name) {
 		struct bpf_map_priv *priv = bpf_map__priv(map);
 
 		if (IS_ERR(priv))
-			return -BPF_LOADER_ERRNO__INTERNAL;
+			return ERR_PTR(-BPF_LOADER_ERRNO__INTERNAL);
 
 		/*
 		 * No need to check map type: type should have been
@@ -1561,49 +1561,61 @@ int bpf__setup_stdout(struct perf_evlist *evlist)
 	}
 
 	if (!need_init)
-		return 0;
+		return NULL;
 
 	if (!tmpl_priv) {
-		err = parse_events(evlist, "bpf-output/no-inherit=1,name=__bpf_stdout__/",
-				   NULL);
+		char *event_definition = NULL;
+
+		if (asprintf(&event_definition, "bpf-output/no-inherit=1,name=%s/", name) < 0)
+			return ERR_PTR(-ENOMEM);
+
+		err = parse_events(evlist, event_definition, NULL);
+		free(event_definition);
+
 		if (err) {
-			pr_debug("ERROR: failed to create bpf-output event\n");
-			return -err;
+			pr_debug("ERROR: failed to create the \"%s\" bpf-output event\n", name);
+			return ERR_PTR(-err);
 		}
 
 		evsel = perf_evlist__last(evlist);
 	}
 
-	bpf__for_each_stdout_map(map, obj, tmp) {
+	bpf__for_each_map_named(map, obj, tmp, name) {
 		struct bpf_map_priv *priv = bpf_map__priv(map);
 
 		if (IS_ERR(priv))
-			return -BPF_LOADER_ERRNO__INTERNAL;
+			return ERR_PTR(-BPF_LOADER_ERRNO__INTERNAL);
 		if (priv)
 			continue;
 
 		if (tmpl_priv) {
 			priv = bpf_map_priv__clone(tmpl_priv);
 			if (!priv)
-				return -ENOMEM;
+				return ERR_PTR(-ENOMEM);
 
 			err = bpf_map__set_priv(map, priv, bpf_map_priv__clear);
 			if (err) {
 				bpf_map_priv__clear(map, priv);
-				return err;
+				return ERR_PTR(err);
 			}
 		} else if (evsel) {
 			struct bpf_map_op *op;
 
 			op = bpf_map__add_newop(map, NULL);
 			if (IS_ERR(op))
-				return PTR_ERR(op);
+				return ERR_PTR(PTR_ERR(op));
 			op->op_type = BPF_MAP_OP_SET_EVSEL;
 			op->v.evsel = evsel;
 		}
 	}
 
-	return 0;
+	return evsel;
+}
+
+int bpf__setup_stdout(struct perf_evlist *evlist)
+{
+	struct perf_evsel *evsel = bpf__setup_output_event(evlist, "__bpf_stdout__");
+	return IS_ERR(evsel) ? PTR_ERR(evsel) : 0;
 }
 
 #define ERRNO_OFFSET(e)		((e) - __BPF_LOADER_ERRNO__START)
@@ -1780,8 +1792,8 @@ int bpf__strerror_apply_obj_config(int err, char *buf, size_t size)
 	return 0;
 }
 
-int bpf__strerror_setup_stdout(struct perf_evlist *evlist __maybe_unused,
-			       int err, char *buf, size_t size)
+int bpf__strerror_setup_output_event(struct perf_evlist *evlist __maybe_unused,
+				     int err, char *buf, size_t size)
 {
 	bpf__strerror_head(err, buf, size);
 	bpf__strerror_end(buf, size);