perf mem: Clean up perf_mem_events__ptr()

The mem_events can be retrieved from the struct perf_pmu now. An ARCH
specific perf_mem_events__ptr() is not required anymore. Remove all of
them.

The Intel hybrid has multiple mem-events-supported PMUs. But they share
the same mem_events. Other ARCHs only support one mem-events-supported
PMU. In the configuration, it's good enough to only configure the
mem_events for one PMU. Add perf_mem_events_find_pmu() which returns the
first mem-events-supported PMU.

In the perf_mem_events__init(), the perf_pmus__scan() is not required
anymore. It avoids checking the sysfs for every PMU on the system.

Make the perf_mem_events__record_args() more generic. Remove the
perf_mem_events__print_unsupport_hybrid().

Since pmu is added as a new parameter, rename perf_mem_events__ptr() to
perf_pmu__mem_events_ptr(). Several other functions also do a similar
rename.

Reviewed-by: Ian Rogers <irogers@google.com>
Reviewed-by: Kajol Jain <kjain@linux.ibm.com>
Tested-by: Ravi Bangoria <ravi.bangoria@amd.com>
Tested-by: Kajol jain <kjain@linux.ibm.com>
Signed-off-by: Kan Liang <kan.liang@linux.intel.com>
Cc: james.clark@arm.com
Cc: will@kernel.org
Cc: leo.yan@linaro.org
Cc: mike.leach@linaro.org
Cc: renyu.zj@linux.alibaba.com
Cc: yuhaixin.yhx@linux.alibaba.com
Cc: tmricht@linux.ibm.com
Cc: atrajeev@linux.vnet.ibm.com
Cc: linux-arm-kernel@lists.infradead.org
Cc: john.g.garry@oracle.com
Link: https://lore.kernel.org/r/20240123185036.3461837-3-kan.liang@linux.intel.com
Signed-off-by: Namhyung Kim <namhyung@kernel.org>

1 files changed, 1 insertions, 9 deletions

diff --git a/tools/perf/arch/arm64/util/mem-events.c b/tools/perf/arch/arm64/util/mem-events.c
index edf8207f7812..d3e69a520c2b 100644
--- a/tools/perf/arch/arm64/util/mem-events.c
+++ b/tools/perf/arch/arm64/util/mem-events.c
@@ -13,17 +13,9 @@ struct perf_mem_event perf_mem_events_arm[PERF_MEM_EVENTS__MAX] = {
 
 static char mem_ev_name[100];
 
-struct perf_mem_event *perf_mem_events__ptr(int i)
-{
-	if (i >= PERF_MEM_EVENTS__MAX)
-		return NULL;
-
-	return &perf_mem_events_arm[i];
-}
-
 const char *perf_mem_events__name(int i, const char *pmu_name __maybe_unused)
 {
-	struct perf_mem_event *e = perf_mem_events__ptr(i);
+	struct perf_mem_event *e = &perf_mem_events_arm[i];
 
 	if (i >= PERF_MEM_EVENTS__MAX)
 		return NULL;