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| author | Madhavan Srinivasan <maddy@linux.vnet.ibm.com> | 2017-04-11 04:51:07 +0300 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2017-04-19 13:00:22 +0300 |
| commit | 170a315f41c647ce826e389c64047ee1f4cd2dde (patch) | |
| tree | f6c44d6b0e61a224f426654e7df6591eb33e8604 /arch/powerpc/perf/isa207-common.c | |
| parent | 79e96f8f930d425ab48c511f8a6db16ca7fc68b1 (diff) | |
| download | linux-170a315f41c647ce826e389c64047ee1f4cd2dde.tar.xz | |
powerpc/perf: Support to export MMCRA[TEC*] field to userspace
Threshold feature when used with MMCRA [Threshold Event Counter Event],
MMCRA[Threshold Start event] and MMCRA[Threshold End event] will update
MMCRA[Threashold Event Counter Exponent] and MMCRA[Threshold Event
Counter Multiplier] with the corresponding threshold event count values.
Patch to export MMCRA[TECX/TECM] to userspace in 'weight' field of
struct perf_sample_data.
Signed-off-by: Madhavan Srinivasan <maddy@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'arch/powerpc/perf/isa207-common.c')
| -rw-r--r-- | arch/powerpc/perf/isa207-common.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/arch/powerpc/perf/isa207-common.c b/arch/powerpc/perf/isa207-common.c index a8b100ef8e6c..8125160be7bc 100644 --- a/arch/powerpc/perf/isa207-common.c +++ b/arch/powerpc/perf/isa207-common.c @@ -221,6 +221,14 @@ void isa207_get_mem_data_src(union perf_mem_data_src *dsrc, u32 flags, } } +void isa207_get_mem_weight(u64 *weight) +{ + u64 mmcra = mfspr(SPRN_MMCRA); + u64 exp = MMCRA_THR_CTR_EXP(mmcra); + u64 mantissa = MMCRA_THR_CTR_MANT(mmcra); + + *weight = mantissa << (2 * exp); +} int isa207_get_constraint(u64 event, unsigned long *maskp, unsigned long *valp) { |