QEMU RISC-V Virt Machine Platform ================================= The **QEMU RISC-V Virt Machine** is a virtual platform created for RISC-V software development and testing. It is also referred to as *QEMU RISC-V VirtIO machine* because it uses VirtIO devices for network, storage, and other types of IO. To build the platform-specific library and firmware images, provide the *PLATFORM=generic* parameter to the top level `make` command. Platform Options ---------------- The *QEMU RISC-V Virt Machine* platform does not have any platform-specific options. Execution on QEMU RISC-V 64-bit ------------------------------- **No Payload Case** Build: ``` make PLATFORM=generic ``` Run: ``` qemu-system-riscv64 -M virt -m 256M -nographic \ -bios build/platform/generic/firmware/fw_payload.bin ``` **U-Boot Payload** Note: the command line examples here assume that U-Boot was compiled using the `qemu-riscv64_smode_defconfig` configuration. Build: ``` make PLATFORM=generic FW_PAYLOAD_PATH=/u-boot.bin ``` Run: ``` qemu-system-riscv64 -M virt -m 256M -nographic \ -bios build/platform/generic/firmware/fw_payload.elf ``` or ``` qemu-system-riscv64 -M virt -m 256M -nographic \ -bios build/platform/generic/firmware/fw_jump.bin \ -kernel /u-boot.bin ``` **Linux Kernel Payload** Note: We assume that the Linux kernel is compiled using *arch/riscv/configs/defconfig*. Build: ``` make PLATFORM=generic FW_PAYLOAD_PATH=/arch/riscv/boot/Image ``` Run: ``` qemu-system-riscv64 -M virt -m 256M -nographic \ -bios build/platform/generic/firmware/fw_payload.elf \ -drive file=,format=raw,id=hd0 \ -device virtio-blk-device,drive=hd0 \ -append "root=/dev/vda rw console=ttyS0" ``` or ``` qemu-system-riscv64 -M virt -m 256M -nographic \ -bios build/platform/generic/firmware/fw_jump.bin \ -kernel /arch/riscv/boot/Image \ -drive file=,format=raw,id=hd0 \ -device virtio-blk-device,drive=hd0 \ -append "root=/dev/vda rw console=ttyS0" ``` Execution on QEMU RISC-V 32-bit ------------------------------- **No Payload Case** Build: ``` make PLATFORM=generic PLATFORM_RISCV_XLEN=32 ``` Run: ``` qemu-system-riscv32 -M virt -m 256M -nographic \ -bios build/platform/generic/firmware/fw_payload.bin ``` **U-Boot Payload** Note: the command line examples here assume that U-Boot was compiled using the `qemu-riscv32_smode_defconfig` configuration. Build: ``` make PLATFORM=generic PLATFORM_RISCV_XLEN=32 FW_PAYLOAD_PATH=/u-boot.bin ``` Run: ``` qemu-system-riscv32 -M virt -m 256M -nographic \ -bios build/platform/generic/firmware/fw_payload.elf ``` or ``` qemu-system-riscv32 -M virt -m 256M -nographic \ -bios build/platform/generic/firmware/fw_jump.bin \ -kernel /u-boot.bin ``` **Linux Kernel Payload** Note: We assume that the Linux kernel is compiled using *arch/riscv/configs/rv32_defconfig*. Build: ``` make PLATFORM=generic PLATFORM_RISCV_XLEN=32 FW_PAYLOAD_PATH=/arch/riscv/boot/Image ``` Run: ``` qemu-system-riscv32 -M virt -m 256M -nographic \ -bios build/platform/generic/firmware/fw_payload.elf \ -drive file=,format=raw,id=hd0 \ -device virtio-blk-device,drive=hd0 \ -append "root=/dev/vda rw console=ttyS0" ``` or ``` qemu-system-riscv32 -M virt -m 256M -nographic \ -bios build/platform/generic/firmware/fw_jump.bin \ -kernel /arch/riscv/boot/Image \ -drive file=,format=raw,id=hd0 \ -device virtio-blk-device,drive=hd0 \ -append "root=/dev/vda rw console=ttyS0" ```