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authorJiri Olsa <jolsa@redhat.com>2012-10-10 12:53:11 (GMT)
committerIngo Molnar <mingo@kernel.org>2012-10-24 08:41:23 (GMT)
commita47473939db20e3961b200eb00acf5fcf084d755 (patch)
treeb588160c049ce2dd2755a44094d6cc1f9b5d9068 /arch/x86/kernel/cpu/perf_event.h
parentef8c029fa793423439e67ef0416b220d3fa3321a (diff)
downloadlinux-fsl-qoriq-a47473939db20e3961b200eb00acf5fcf084d755.tar.xz
perf/x86: Make hardware event translations available in sysfs
Add support to display hardware events translations available through the sysfs. Add 'events' group attribute under the sysfs x86 PMU record with attribute/file for each hardware event. This patch adds only backbone for PMUs to display config under 'events' directory. The specific PMU support itself will come in next patches, however this is how the sysfs group will look like: # ls /sys/devices/cpu/events/ branch-instructions branch-misses bus-cycles cache-misses cache-references cpu-cycles instructions ref-cycles stalled-cycles-backend stalled-cycles-frontend The file - hw event ID mapping is: file hw event ID --------------------------------------------------------------- cpu-cycles PERF_COUNT_HW_CPU_CYCLES instructions PERF_COUNT_HW_INSTRUCTIONS cache-references PERF_COUNT_HW_CACHE_REFERENCES cache-misses PERF_COUNT_HW_CACHE_MISSES branch-instructions PERF_COUNT_HW_BRANCH_INSTRUCTIONS branch-misses PERF_COUNT_HW_BRANCH_MISSES bus-cycles PERF_COUNT_HW_BUS_CYCLES stalled-cycles-frontend PERF_COUNT_HW_STALLED_CYCLES_FRONTEND stalled-cycles-backend PERF_COUNT_HW_STALLED_CYCLES_BACKEND ref-cycles PERF_COUNT_HW_REF_CPU_CYCLES Each file in the 'events' directory contains the term translation for the symbolic hw event for the currently running cpu model. # cat /sys/devices/cpu/events/stalled-cycles-backend event=0xb1,umask=0x01,inv,cmask=0x01 Suggested-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Signed-off-by: Jiri Olsa <jolsa@redhat.com> Cc: Arnaldo Carvalho de Melo <acme@ghostprotocols.net> Cc: Paul Mackerras <paulus@samba.org> Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Stephane Eranian <eranian@google.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/1349873598-12583-2-git-send-email-jolsa@redhat.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'arch/x86/kernel/cpu/perf_event.h')
-rw-r--r--arch/x86/kernel/cpu/perf_event.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/x86/kernel/cpu/perf_event.h b/arch/x86/kernel/cpu/perf_event.h
index 271d257..6f75b6a 100644
--- a/arch/x86/kernel/cpu/perf_event.h
+++ b/arch/x86/kernel/cpu/perf_event.h
@@ -354,6 +354,8 @@ struct x86_pmu {
int attr_rdpmc;
struct attribute **format_attrs;
+ ssize_t (*events_sysfs_show)(char *page, u64 config);
+
/*
* CPU Hotplug hooks
*/