[PATCH v8 00/21] drivers/perf: apple_m1: Add Apple A7-A11, T2 SoC support

[Nick Chan <towinchenmi@gmail.com>]

This series adds support for the CPU PMU in the older Apple A7-A11, T2
SoCs. These PMUs may have a different event layout, less counters, or
deliver their interrupts via IRQ instead of a FIQ. Since some of those
older SoCs support 32-bit EL0, counting for 32-bit EL0 also need to
be enabled by the driver where applicable.

Patch 1 adds the DT bindings.
Patch 2-7 prepares the driver to allow adding support for those
older SoCs.
Patch 8-12 adds support for the older SoCs.
Patch 13-21 are the DT changes.

Signed-off-by: Nick Chan <towinchenmi@gmail.com>
---
Changes in v8:
- Rebased on top of v6.17-rc1
- Collect Ivaylo's Tested-by
- Drop #define PMCR1_COUNT_A64_EL3_0_7
- Reword reason to not initialize PMUv3 remap in EL1
- Link to v7: https://lore.kernel.org/r/20250510-apple-cpmu-v7-0-bd505cb6c520@gmail.com

Changes in v7:
- Fix a W=1 compile warning in apple_pmu_get_event_idx() as appearently using GENMASK()
in a function prototype causes a warning in GCC.
- Link to v6: https://lore.kernel.org/r/20250407-apple-cpmu-v6-0-ae8c2f225c1f@gmail.com

Changes in v6:
- Rebased on top of v6.15-rc1 (Conflict with FEAT_PMUv3 support for KVM on Apple Hardware)
- Add patch to skip initialization of PMUv3 remap in EL1 even though not strictly needed
- Include DT patches
- Link to v5: https://lore.kernel.org/r/20250228-apple-cpmu-v5-0-9e124cd28ed4@gmail.com

Changes in v5:
- Slightly change "drivers/perf: apple_m1: Add Apple A11 Support", to keep things in
chronological order.
- Link to v4: https://lore.kernel.org/r/20250214-apple-cpmu-v4-0-ffca0e45147e@gmail.com

Changes in v4:
- Support per-implementation event attr group
- Fix Apple A7 event attr groups
- Link to v3: https://lore.kernel.org/r/20250213-apple-cpmu-v3-0-be7f8aded81f@gmail.com

Changes in v3:
- Configure PMC8 and PMC9 for 32-bit EL0
- Remove redundant _common suffix from shared functions
- Link to v2: https://lore.kernel.org/r/20250213-apple-cpmu-v2-0-87b361932e88@gmail.com

Changes in v2:
- Remove unused flags parameter from apple_pmu_init_common()
- Link to v1: https://lore.kernel.org/r/20250212-apple-cpmu-v1-0-f8c7f2ac1743@gmail.com

---
Nick Chan (21):
      dt-bindings: arm: pmu: Add Apple A7-A11 SoC CPU PMU compatibles
      drivers/perf: apple_m1: Only init PMUv3 remap when EL2 is available
      drivers/perf: apple_m1: Support per-implementation event tables
      drivers/perf: apple_m1: Support a per-implementation number of counters
      drivers/perf: apple_m1: Support configuring counters for 32-bit EL0
      drivers/perf: apple_m1: Support per-implementation PMU startup
      drivers/perf: apple_m1: Support per-implementation event attr group
      drivers/perf: apple_m1: Add Apple A7 support
      drivers/perf: apple_m1: Add Apple A8/A8X support
      drivers/perf: apple_m1: Add A9/A9X support
      drivers/perf: apple_m1: Add Apple A10/A10X/T2 Support
      drivers/perf: apple_m1: Add Apple A11 Support
      arm64: dts: apple: s5l8960x: Add CPU PMU nodes
      arm64: dts: apple: t7000: Add CPU PMU nodes
      arm64: dts: apple: t7001: Add CPU PMU nodes
      arm64: dts: apple: s800-0-3: Add CPU PMU nodes
      arm64: dts: apple: s8001: Add CPU PMU nodes
      arm64: dts: apple: t8010: Add CPU PMU nodes
      arm64: dts: apple: t8011: Add CPU PMU nodes
      arm64: dts: apple: t8012: Add CPU PMU nodes
      arm64: dts: apple: t8015: Add CPU PMU nodes

 Documentation/devicetree/bindings/arm/pmu.yaml |   6 +
 arch/arm64/boot/dts/apple/s5l8960x.dtsi        |   8 +
 arch/arm64/boot/dts/apple/s800-0-3.dtsi        |   8 +
 arch/arm64/boot/dts/apple/s8001.dtsi           |   8 +
 arch/arm64/boot/dts/apple/t7000.dtsi           |   8 +
 arch/arm64/boot/dts/apple/t7001.dtsi           |   9 +
 arch/arm64/boot/dts/apple/t8010.dtsi           |   8 +
 arch/arm64/boot/dts/apple/t8011.dtsi           |   9 +
 arch/arm64/boot/dts/apple/t8012.dtsi           |   8 +
 arch/arm64/boot/dts/apple/t8015.dtsi           |  24 +
 arch/arm64/include/asm/apple_m1_pmu.h          |   2 +
 drivers/perf/apple_m1_cpu_pmu.c                | 807 +++++++++++++++++++++++--
 12 files changed, 870 insertions(+), 35 deletions(-)
---
base-commit: 8f5ae30d69d7543eee0d70083daf4de8fe15d585
change-id: 20250211-apple-cpmu-5a5a3da39483

Best regards,
-- 
Nick Chan <towinchenmi@gmail.com>