The M1 SoC embeds a per-CPU PMU that has a very different programming
interface compared to the architected PMUv3 that is normally present
on standard implementations.
This small series adds a driver for this HW by leveraging the arm_pmu
infrastructure, resulting in a rather simple driver.
Of course, we know next to nothing about the actual events this PMU
counts, aside from CPU cycles and instructions. Everything else is
undocumented.
My hope is that this driver will help people to explore the event
space and propose possible interpretations for these events using
reproducible test cases.
Marc Zyngier (8):
dt-bindings: arm-pmu: Document Apple PMU compatible strings
dt-bindings: apple,aic: Add CPU PMU per-cpu pseudo-interrupts
irqchip/apple-aic: Add cpumasks for E and P cores
irqchip/apple-aic: Wire PMU interrupts
irqchip/apple-aic: Move PMU-specific registers to their own include
file
arm64: apple: t8301: Add PMU nodes
drivers/perf: arm_pmu: Handle 47 bit counters
drivers/perf: Add Apple icestorm/firestorm CPU PMU driver
.../devicetree/bindings/arm/pmu.yaml | 2 +
.../interrupt-controller/apple,aic.yaml | 2 +
arch/arm64/boot/dts/apple/t8103.dtsi | 12 +
arch/arm64/include/asm/apple_m1_pmu.h | 64 ++
drivers/irqchip/irq-apple-aic.c | 59 +-
drivers/perf/Kconfig | 7 +
drivers/perf/Makefile | 1 +
drivers/perf/apple_m1_cpu_pmu.c | 632 ++++++++++++++++++
drivers/perf/arm_pmu.c | 2 +
.../interrupt-controller/apple-aic.h | 2 +
include/linux/perf/arm_pmu.h | 2 +
11 files changed, 763 insertions(+), 22 deletions(-)
create mode 100644 arch/arm64/include/asm/apple_m1_pmu.h
create mode 100644 drivers/perf/apple_m1_cpu_pmu.c
--
2.30.2
