This patch series contains the changes for a minimal Linux on Apple Silicon boot, including SMP.
(sorry for the resubmission, I didn't attach the drivers to the ones beforehand, and didn't submit it properly) The changes: - Support for FIQ interrupts in-kernel This is required for the timer and IPIs on Apple SoCs. - WFI hook Apple processors do not keep register state across WFI. As such, put a mechanism in cpu_ops to put a custom sleep function instead. - use nGnRnE instead of nGnRE on Apple processors Device-nGnRE writes go to nowhere on Apple processors, as such use MAIR to change those to Device-nGnRE writes. - Apple AIC driver Driver for the Apple AIC interrupt controller. - Apple CPU start driver On Apple Macs, RVBAR is locked by the bootloader. And the hardware doesn't have EL3 to provide PSCI as an option either. This also implements the workaround for WFI on the hardware. What is not present: - Device tree, will be present in a future version of this patchset - More devices. Thank you, Mohamed Mediouni (1): arm64: mm: use nGnRnE instead of nGnRE on Apple processors Stan Skowronek (6): arm64: kernel: FIQ support arm64: kernel: Add a WFI hook. irqchip/apple-aic: Add support for Apple AIC arm64/Kconfig: Add Apple Silicon SoC platform arm64: kernel: Apple CPU start driver irqchip/apple-aic: add SMP support to the Apple AIC driver. .../devicetree/bindings/arm/cpus.yaml | 1 + .../interrupt-controller/apple,aic.yaml | 49 +++ MAINTAINERS | 6 + arch/arm64/Kconfig.platforms | 7 + arch/arm64/include/asm/arch_gicv3.h | 2 +- arch/arm64/include/asm/assembler.h | 8 +- arch/arm64/include/asm/cpu_ops.h | 2 + arch/arm64/include/asm/daifflags.h | 4 +- arch/arm64/include/asm/irq.h | 4 + arch/arm64/include/asm/irqflags.h | 6 +- arch/arm64/kernel/Makefile | 1 + arch/arm64/kernel/apple_cpustart.c | 153 ++++++++ arch/arm64/kernel/cpu_ops.c | 6 + arch/arm64/kernel/entry.S | 74 +++- arch/arm64/kernel/irq.c | 14 + arch/arm64/kernel/process.c | 13 +- arch/arm64/mm/proc.S | 26 ++ drivers/irqchip/Kconfig | 6 + drivers/irqchip/Makefile | 1 + drivers/irqchip/irq-apple-aic.c | 364 ++++++++++++++++++ 20 files changed, 728 insertions(+), 19 deletions(-) create mode 100644 Documentation/devicetree/bindings/interrupt-controller/apple,aic.yaml create mode 100644 arch/arm64/kernel/apple_cpustart.c create mode 100644 drivers/irqchip/irq-apple-aic.c -- 2.29.2
