[PATCH 00/24] Add basic ACPI support for RISC-V

[Rafael J. Wysocki]

On Mon, Jan 30, 2023 at 7:22 PM Sunil V L <sunilvl at ventanamicro.com> wrote:
>
> This patch series enables the basic ACPI infrastructure for RISC-V.
> Supporting external interrupt controllers is in progress and hence it is
> tested using polling based HVC SBI console and RAM disk.
>
> The series depends on Anup's IPI improvement series.
> https://github.com/avpatel/linux/commits/riscv_ipi_imp_v17
>
> These changes are available at
> https://github.com/vlsunil/linux/commits/acpi_b1_us_review_ipi17
>
> Testing:
> 1) Build Qemu with ACPI support using below branch
> https://github.com/vlsunil/qemu/tree/acpi_b1_us_review
>
> 2) Build EDK2 as per instructions in
> https://github.com/vlsunil/riscv-uefi-edk2-docs/wiki/RISC-V-Qemu-Virt-support
>
> 3) Build Linux after enabling SBI HVC and SBI earlycon
> CONFIG_RISCV_SBI_V01=y
> CONFIG_SERIAL_EARLYCON_RISCV_SBI=y
> CONFIG_HVC_RISCV_SBI=y
>
> 4) Build buildroot.
>
> Run with below command.
> qemu-system-riscv64   -nographic \
> -drive file=Build/RiscVVirtQemu/RELEASE_GCC5/FV/RISCV_VIRT.fd,if=pflash,format=raw,unit=1 \
> -machine virt,acpi=on -smp 16 -m 2G \
> -kernel arch/riscv/boot/Image \
> -initrd buildroot/output/images/rootfs.cpio \
> -append "root=/dev/ram ro console=hvc0 earlycon=sbi"
>
> Jisheng Zhang (1):
>   riscv: move sbi_init() earlier before jump_label_init()
>
> Sunil V L (23):
>   ACPICA: MADT: Add RISC-V INTC interrupt controller
>   ACPICA: Add structure definitions for RISC-V RHCT
>   RISC-V: ACPI: Add empty headers to enable ACPI core
>   RISC-V: ACPI: Add basic functions to build ACPI core
>   RISC-V: ACPI: Add PCI functions to build ACPI core
>   RISC-V: ACPI: Enable ACPI build infrastructure
>   ACPI: Enable ACPI_PROCESSOR for RISC-V
>   ACPI: OSL: Make should_use_kmap() 0 for RISC-V.
>   ACPI: processor_core: RISC-V: Enable mapping processor to the hartid
>   RISC-V: ACPI: irqchip/riscv-intc: Add ACPI support
>   RISC-V: ACPI: smpboot: Create wrapper smp_setup()
>   RISC-V: ACPI: smpboot: Add ACPI support in smp_setup()
>   RISC-V: ACPI: smpboot: Add function to retrieve the hartid
>   clocksource/timer-riscv: Refactor riscv_timer_init_dt()
>   RISC-V: ACPI: clocksource/timer-riscv: Add ACPI support
>   ACPI: RISC-V: drivers/acpi: Add RHCT related code
>   RISC-V: ACPI: time.c: Add ACPI support for time_init()
>   RISC-V: ACPI: cpufeature: Add ACPI support in riscv_fill_hwcap()
>   RISC-V: ACPI: cpu: Enable cpuinfo for ACPI systems
>   RISC-V: ACPI: Add ACPI initialization in setup_arch()
>   RISC-V: ACPI: Enable ACPI in defconfig
>   MAINTAINERS: Add entry for drivers/acpi/riscv
>   Documentation/kernel-parameters.txt: Add RISC-V for ACPI parameter

The series looks fine to me from the ACPI perspective, so please feel
free to add

Acked-by: Rafael J. Wysocki <rafael.j.wysocki at intel.com>

to it and route it via RISC-V.

Thanks!