diff options
| author | Rob Herring <robh@kernel.org> | 2021-04-14 11:07:37 -0500 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2021-04-15 16:38:51 -0300 |
| commit | 6cd70754f262e593febc06a02d7ea637c927ea42 (patch) | |
| tree | 865f27aa65b22331f996dd08bdec689daf91f113 /tools/lib/perf/libperf.map | |
| parent | 2fc83c2cd77703cfcfc1ffaa092614fb1f837292 (diff) | |
| download | linux-6cd70754f262e593febc06a02d7ea637c927ea42.tar.bz2 | |
libperf: Add evsel mmap support
In order to support usersapce access, an event must be mmapped. While
there's already mmap support for evlist, the usecase is a bit different
than the self monitoring with userspace access. So let's add new
perf_evsel__mmap()/perf_evsel_munmap() functions to mmap/munmap an
evsel. This allows implementing userspace access as a fastpath for
perf_evsel__read().
The mmapped address is returned by perf_evsel__mmap_base() which
primarily for users/tests to check if userspace access is enabled.
Signed-off-by: Rob Herring <robh@kernel.org>
Acked-by: Jiri Olsa <jolsa@redhat.com>
Acked-by: Namhyung Kim <namhyung@kernel.org>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Itaru Kitayama <itaru.kitayama@gmail.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Will Deacon <will@kernel.org>
Link: http://lore.kernel.org/lkml/20210414155412.3697605-2-robh@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/lib/perf/libperf.map')
| -rw-r--r-- | tools/lib/perf/libperf.map | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/tools/lib/perf/libperf.map b/tools/lib/perf/libperf.map index 7be1af8a546c..c0c7ceb11060 100644 --- a/tools/lib/perf/libperf.map +++ b/tools/lib/perf/libperf.map @@ -23,6 +23,9 @@ LIBPERF_0.0.1 { perf_evsel__disable; perf_evsel__open; perf_evsel__close; + perf_evsel__mmap; + perf_evsel__munmap; + perf_evsel__mmap_base; perf_evsel__read; perf_evsel__cpus; perf_evsel__threads; |