perf: Arm SMMU PMU driver
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b4 am [email protected]Versions newest first
- v1 Latest6 patches 3 repliesIn review
Patches in v1 No applies recorded yet
| # | Subject and files | Size | Replies | Applied |
|---|---|---|---|---|
| 1/6 | iommu/arm-smmu: Account for PMU interruptsdrivers/ drivers/ | +46 | 0 replies | |
| 2/6 | acpi/iort: Register SMMUv2 PMU interruptsdrivers/ drivers/ | +15 | 0 replies | |
| 3/6 | iommu/arm-smmu: Add DT PMU supportDocumentation/ drivers/ | +22 | 2 replies | |
| 4/6 | iommu/smmu: Create child devices for PMUsdrivers/ | +46 | 0 replies | |
| 5/6 | perf: Add ARM SMMU PMU driverdrivers/ drivers/ drivers/ | +748 | 0 replies | |
| 6/6 | arm64: dts: Add SMMU PMUs to Junoarch/ | +20 | 0 replies |
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No Reviewed-by, Acked-by or Tested-by trailers for v1 yet.
Cover letter [PATCH 0/6] perf: Arm SMMU PMU driver
Hi all,
Since our friends at Linaro had some interest in the area, I've dug up and finished off my old SMMUv1/v2 PMU driver, now with a slightly less terrible DT binding to boot. Patch #1 involves a general refactoring of the IRQ setup code in arm-smmu which also now serves to remove the general dependency on explicit IRQ resources for of_platform devices.
ACPI support via IORT (patch #2) is pleasingly trivial, but does have a hard dependency on the previous patch, otherwise SMMU context interrupts may get messed up.
The driver itself in patch #5 is still largely a time capsule of me learning the PMU APIs 5 years ago (as a warm-up for arm-cmn). I've mostly just added IRQ affinity support (which I didn't yet fully understand at the time) and tweaked a few comments. I'm pretty confident all the testing I did back then is still valid, so I've just run some quick sanity checks with patch #6 to verify the new DT binding.
Cheers,
Robin.
Robin Murphy (6):
iommu/arm-smmu: Account for PMU interrupts
acpi/iort: Register SMMUv2 PMU interrupts
iommu/arm-smmu: Add DT PMU support
iommu/smmu: Create child devices for PMUs
perf: Add ARM SMMU PMU driver
arm64: dts: Add SMMU PMUs to Juno
.../devicetree/bindings/iommu/arm,smmu.yaml | 19 +- arch/arm64/boot/dts/arm/juno-base.dtsi | 26 +- drivers/acpi/arm64/iort.c | 18 +- drivers/iommu/arm/arm-smmu/arm-smmu.c | 143 ++-- drivers/iommu/arm/arm-smmu/arm-smmu.h | 5 +- drivers/perf/Kconfig | 24 +- drivers/perf/Makefile | 1 + drivers/perf/arm-smmu-pmu.c | 732 ++++++++++++++++++ 8 files changed, 896 insertions(+), 72 deletions(-) create mode 100644 drivers/perf/arm-smmu-pmu.c
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