diff options
author | 2019-05-24 11:34:52 -0600 | |
---|---|---|
committer | 2019-06-10 15:50:01 -0300 | |
commit | 3399ad9ac234364396f75531203c38be5d2872c7 (patch) | |
tree | 2db48e78aa87210926eb36fc54fefa972e77efa1 /tools/perf/util/cs-etm.h | |
parent | perf evsel: Remove superfluous nthreads system_wide setup in alloc_fd() (diff) | |
download | linux-3399ad9ac234364396f75531203c38be5d2872c7.tar.gz linux-3399ad9ac234364396f75531203c38be5d2872c7.tar.bz2 linux-3399ad9ac234364396f75531203c38be5d2872c7.zip |
perf cs-etm: Configure contextID tracing in CPU-wide mode
When operating in CPU-wide mode being notified of contextID changes is
required so that the decoding mechanic is aware of the process context
switch.
Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Reviewed-by: Suzuki Poulouse <suzuki.poulose@arm.com>
Tested-by: Leo Yan <leo.yan@linaro.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Suzuki Poulouse <suzuki.poulose@arm.com>
Cc: coresight@lists.linaro.org
Cc: linux-arm-kernel@lists.infradead.org
Link: http://lkml.kernel.org/r/20190524173508.29044-2-mathieu.poirier@linaro.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/util/cs-etm.h')
-rw-r--r-- | tools/perf/util/cs-etm.h | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/tools/perf/util/cs-etm.h b/tools/perf/util/cs-etm.h index 0e97c196147a..826c9eedaf5c 100644 --- a/tools/perf/util/cs-etm.h +++ b/tools/perf/util/cs-etm.h @@ -103,6 +103,18 @@ struct intlist *traceid_list; #define KiB(x) ((x) * 1024) #define MiB(x) ((x) * 1024 * 1024) +/* + * Create a contiguous bitmask starting at bit position @l and ending at + * position @h. For example + * GENMASK_ULL(39, 21) gives us the 64bit vector 0x000000ffffe00000. + * + * Carbon copy of implementation found in $KERNEL/include/linux/bitops.h + */ +#define GENMASK(h, l) \ + (((~0UL) - (1UL << (l)) + 1) & (~0UL >> (BITS_PER_LONG - 1 - (h)))) + +#define BMVAL(val, lsb, msb) ((val & GENMASK(msb, lsb)) >> lsb) + #define CS_ETM_HEADER_SIZE (CS_HEADER_VERSION_0_MAX * sizeof(u64)) #define __perf_cs_etmv3_magic 0x3030303030303030ULL |