This series adds the basic ACPI support for the RISC-V virt machine. Currently only INTC interrupt controller specification is approved by the UEFI forum. External interrupt controller support in ACPI is in progress.
The basic infrstructure changes are mostly leveraged from ARM. This adds support for INTC and RHCT tables as specified in below ECR links which are approved by UEFI forum. RINTC - https://drive.google.com/file/d/1R6k4MshhN3WTT-hwqAquu5nX6xSEqK2l/view RHCT - https://drive.google.com/file/d/1nP3nFiH4jkPMp6COOxP6123DCZKR-tia/view These changes are also available @ https://github.com/vlsunil/qemu/tree/acpi_b1_us_review The series is tested using SBI HVC console and initrd. Test instructions: 1) Build Qemu with ACPI support (this series) 2) Build EDK2 as per instructions in https://github.com/vlsunil/riscv-uefi-edk2-docs/wiki/RISC-V-Qemu-Virt-support 3) Build Linux with ACPI support using below branch https://github.com/vlsunil/linux/commits/acpi_b1_us_review_ipi17 after enabling SBI HVC and SBI earlycon options. 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" Sunil V L (10): hw/riscv/virt: Add OEM_ID and OEM_TABLE_ID fields hw/riscv/virt: Add a switch to enable/disable ACPI hw/riscv/virt: Add memmap pointer to RiscVVirtState hw/riscv/virt: virt-acpi-build.c: Add basic ACPI tables hw/riscv/virt: virt-acpi-build.c: Add RINTC in MADT hw/riscv/virt: virt-acpi-build.c: Add RHCT Table hw/riscv: meson.build: Build virt-acpi-build.c hw/riscv/Kconfig: virt: Enable ACPI config options hw/riscv/virt.c: Initialize the ACPI tables MAINTAINERS: Add entry for RISC-V ACPI MAINTAINERS | 6 + hw/riscv/Kconfig | 3 + hw/riscv/meson.build | 1 + hw/riscv/virt-acpi-build.c | 391 +++++++++++++++++++++++++++++++++++++ hw/riscv/virt.c | 48 +++++ include/hw/riscv/virt.h | 6 + 6 files changed, 455 insertions(+) create mode 100644 hw/riscv/virt-acpi-build.c -- 2.38.0
