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| author | Neil Leeder <nleeder@codeaurora.org> | 2019-03-26 18:17:51 +0300 |
|---|---|---|
| committer | Will Deacon <will.deacon@arm.com> | 2019-04-04 18:49:21 +0300 |
| commit | 7d839b4b9e00645e49345d6ce5dfa8edf53c1a21 (patch) | |
| tree | 38271bc1daf4fe24b78978e5f4ee6fa5f9fde43d /drivers/perf/Kconfig | |
| parent | 24e516049360eda85cf3fe9903221d43886c2689 (diff) | |
| download | linux-7d839b4b9e00645e49345d6ce5dfa8edf53c1a21.tar.xz | |
perf/smmuv3: Add arm64 smmuv3 pmu driver
Adds a new driver to support the SMMUv3 PMU and add it into the
perf events framework.
Each SMMU node may have multiple PMUs associated with it, each of
which may support different events.
SMMUv3 PMCG devices are named as smmuv3_pmcg_<phys_addr_page> where
<phys_addr_page> is the physical page address of the SMMU PMCG
wrapped to 4K boundary. For example, the PMCG at 0xff88840000 is
named smmuv3_pmcg_ff88840
Filtering by stream id is done by specifying filtering parameters
with the event. options are:
filter_enable - 0 = no filtering, 1 = filtering enabled
filter_span - 0 = exact match, 1 = pattern match
filter_stream_id - pattern to filter against
Example: perf stat -e smmuv3_pmcg_ff88840/transaction,filter_enable=1,
filter_span=1,filter_stream_id=0x42/ -a netperf
Applies filter pattern 0x42 to transaction events, which means events
matching stream ids 0x42 & 0x43 are counted as only upper StreamID
bits are required to match the given filter. Further filtering
information is available in the SMMU documentation.
SMMU events are not attributable to a CPU, so task mode and sampling
are not supported.
Signed-off-by: Neil Leeder <nleeder@codeaurora.org>
Signed-off-by: Shameer Kolothum <shameerali.kolothum.thodi@huawei.com>
Reviewed-by: Robin Murphy <robin.murphy@arm.com>
[will: fold in review feedback from Robin]
[will: rewrite Kconfig text and allow building as a module]
Signed-off-by: Will Deacon <will.deacon@arm.com>
Diffstat (limited to 'drivers/perf/Kconfig')
| -rw-r--r-- | drivers/perf/Kconfig | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/drivers/perf/Kconfig b/drivers/perf/Kconfig index af9bc178495d..a94e586a58b2 100644 --- a/drivers/perf/Kconfig +++ b/drivers/perf/Kconfig @@ -52,6 +52,15 @@ config ARM_PMU_ACPI depends on ARM_PMU && ACPI def_bool y +config ARM_SMMU_V3_PMU + tristate "ARM SMMUv3 Performance Monitors Extension" + depends on ARM64 && ACPI && ARM_SMMU_V3 + help + Provides support for the ARM SMMUv3 Performance Monitor Counter + Groups (PMCG), which provide monitoring of transactions passing + through the SMMU and allow the resulting information to be filtered + based on the Stream ID of the corresponding master. + config ARM_DSU_PMU tristate "ARM DynamIQ Shared Unit (DSU) PMU" depends on ARM64 |