Adding support to parse non architectural event aliases
for given cpu. These aliases will be provided as single
files parsed by pmu_aliases_parse_multi function.
Signed-off-by: Jiri Olsa <jo...@redhat.com>
Cc: Corey Ashford <cjash...@linux.vnet.ibm.com>
Cc: Frederic Weisbecker <fweis...@gmail.com>
Cc: Ingo Molnar <mi...@elte.hu>
Cc: Namhyung Kim <namhy...@kernel.org>
Cc: Paul Mackerras <pau...@samba.org>
Cc: Peter Zijlstra <a.p.zijls...@chello.nl>
Cc: Arnaldo Carvalho de Melo <a...@redhat.com>
Cc: Andi Kleen <a...@linux.intel.com>
Cc: Stephane Eranian <eran...@google.com>
---
tools/perf/arch/x86/Makefile | 7 +++
tools/perf/arch/x86/util/pmu.c | 121 +++++++++++++++++++++++++++++++++++++++++
tools/perf/util/pmu.c | 16 ++++--
tools/perf/util/pmu.h | 2 +
4 files changed, 141 insertions(+), 5 deletions(-)
create mode 100644 tools/perf/arch/x86/util/pmu.c
diff --git a/tools/perf/arch/x86/Makefile b/tools/perf/arch/x86/Makefile
index 815841c..c175f65 100644
--- a/tools/perf/arch/x86/Makefile
+++ b/tools/perf/arch/x86/Makefile
@@ -6,3 +6,10 @@ ifndef NO_LIBUNWIND
LIB_OBJS += $(OUTPUT)arch/$(ARCH)/util/unwind.o
endif
LIB_OBJS += $(OUTPUT)arch/$(ARCH)/util/header.o
+LIB_OBJS += $(OUTPUT)arch/$(ARCH)/util/pmu.o
+
+$(OUTPUT)$(OUTPUT)arch/$(ARCH)/util/pmu.o: $(OUTPUT)arch/$(ARCH)/util/pmu.c
$(OUTPUT)PERF-CFLAGS
+ $(QUIET_CC)$(CC) -o $@ -c $(ALL_CFLAGS) \
+ '-DPERF_EXEC_PATH="$(perfexecdir_SQ)"' \
+ '-DPREFIX="$(prefix_SQ)"' \
+ $<
diff --git a/tools/perf/arch/x86/util/pmu.c b/tools/perf/arch/x86/util/pmu.c
new file mode 100644
index 0000000..a37da52
--- /dev/null
+++ b/tools/perf/arch/x86/util/pmu.c
@@ -0,0 +1,121 @@
+
+#include <linux/compiler.h>
+#include <linux/kernel.h>
+#include <stdio.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <unistd.h>
+#include "pmu.h"
+#include "util.h"
+#include "sysfs.h"
+
+static int add_aliases(struct list_head *head, char *path, const char **files)
+{
+ char file[PATH_MAX];
+ int ret = 0;
+
+ while (!ret && *files) {
+ scnprintf(file, PATH_MAX, "%s/%s", path, *files);
+ ret = pmu_aliases_parse_multi(file, head);
+ files++;
+ }
+
+ return ret;
+}
+
+#define ADD_ALIASES(...) \
+do { \
+ const char *__files[] = { __VA_ARGS__ , NULL }; \
+ return add_aliases(head, path, __files); \
+} while (0)
+
+static int get_path(const char *vendor, char *path, int size)
+{
+ struct stat st;
+
+ /* try local one first */
+ scnprintf(path, size, "./arch/x86/events/%s/", vendor);
+
+ if (stat(path, &st) < 0) {
+ /* and installed later */
+ scnprintf(path, size, "%s/%s/events/x86/%s/",
+ PREFIX, PERF_EXEC_PATH, vendor);
+
+ if (stat(path, &st) < 0)
+ return -1;
+ }
+
+ return 0;
+}
+
+static int intel_aliases(struct list_head *head, unsigned model)
+{
+ char path[PATH_MAX];
+
+ if (get_path("intel", path, PATH_MAX))
+ return -1;
+
+ switch (model) {
+ default:
+ ADD_ALIASES("");
+ break;
+ }
+
+ return 0;
+}
+
+static int cpu_specs(unsigned *vendor, unsigned *model)
+{
+ FILE *file;
+ struct stat st;
+ char path[PATH_MAX];
+ int ret = 0;
+
+ scnprintf(path, PATH_MAX, "%s/devices/system/cpu/modalias",
+ sysfs_find_mountpoint());
+
+ if (stat(path, &st) < 0)
+ return -ENOENT;
+
+ file = fopen(path, "r");
+ if (!file)
+ return -errno;
+
+ if (2 != fscanf(file, "x86cpu:vendor:%X:family:%*X:model:%X:",
+ vendor, model))
+ ret = -1;
+
+ fclose(file);
+ return ret;
+}
+
+static int cpu_aliases(struct list_head *head)
+{
+ unsigned vendol, model;
+ int ret;
+
+ ret = cpu_specs(&vendol, &model);
+ if (ret) {
+ pr_info("failed to get cpu aliases");
+ return 0;
+ }
+
+ switch (vendol) {
+ /* Intel */
+ case 0:
+ return intel_aliases(head, model);
+ default:
+ /* unknown vendor.. plenty to cover ;-) */
+ return 0;
+ }
+
+ return 0;
+}
+
+int arch_pmu_aliases(char *name, struct list_head *head)
+{
+ if (!strcmp(name, "cpu"))
+ return cpu_aliases(head);
+
+ return 0;
+}
diff --git a/tools/perf/util/pmu.c b/tools/perf/util/pmu.c
index 68d6c86..7c2908b 100644
--- a/tools/perf/util/pmu.c
+++ b/tools/perf/util/pmu.c
@@ -219,6 +219,13 @@ static int pmu_aliases_parse(char *dir, struct list_head
*head)
return ret;
}
+__attribute__((weak))
+int arch_pmu_aliases(char *name __maybe_unused,
+ struct list_head *head __maybe_unused)
+{
+ return 0;
+}
+
/*
* Reading the pmu event aliases definition, which should be located at:
* /sys/bus/event_source/devices/<dev>/events as sysfs group attributes.
@@ -236,13 +243,12 @@ static int pmu_aliases(char *name, struct list_head *head)
snprintf(path, PATH_MAX,
"%s/bus/event_source/devices/%s/events", sysfs, name);
- if (stat(path, &st) < 0)
- return 0; /* no error if 'events' does not exist */
-
- if (pmu_aliases_parse(path, head))
+ /* no error if 'events' does not exist */
+ if (!stat(path, &st) &&
+ pmu_aliases_parse(path, head))
return -1;
- return 0;
+ return arch_pmu_aliases(name, head);
}
static int pmu_alias_terms(struct perf_pmu_alias *alias,
diff --git a/tools/perf/util/pmu.h b/tools/perf/util/pmu.h
index add249b..aa049ea 100644
--- a/tools/perf/util/pmu.h
+++ b/tools/perf/util/pmu.h
@@ -45,5 +45,7 @@ char *perf_pmu__event_name(struct list_head *head_terms, bool
remove);
int pmu_aliases_parse_multi(char *path, struct list_head *head);
+int arch_pmu_aliases(char *name, struct list_head *head);
+
int perf_pmu__test(void);
#endif /* __PMU_H */
--
1.7.11.7
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