Mirrors/opensbi
1
0
Fork 1
mirror of https://github.com/riscv-software-src/opensbi.git synced 2025-08-24 23:41:23 +01:00
Code Issues Packages Projects Releases Wiki Activity
Files
a1ffba1ac9b0cde0e9005fa79b36e45216646b9d
opensbi/docs/platform/qemu_virt.md
Alistair Francis 9f44d07df5 platform: qemu/virt: Move kernel start address to 4MB alligned 
In order to support 32-bit guests move the start address to a 4MB
allignment. As 64-bit kernels have a requirement on being 2MB alligned
let's just make this the default for both 32 and 64 bit kernels.

Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
2019-02-08 09:18:46 +05:30

2.2 KiB
Raw Blame History

QEMU RISC-V Virt Machine Platform

The QEMU RISC-V Virt Machine is virtual platform created for RISC-V software development and testing. It is also referred as QEMU RISC-V VirtIO machine because it uses VirtIO devices for network, storage, and other types of IO.

To build platform specific library and firmwares, provide the PLATFORM=qemu/virt 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 64bit

No Payload Case

Build:

make PLATFORM=qemu/virt

Run:

qemu-system-riscv64 -M virt -m 256M -display none -serial stdio \
	-kernel build/platform/qemu/virt/firmware/fw_payload.elf

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=qemu/virt FW_PAYLOAD_PATH=<uboot_build_directory>/u-boot.bin

Run:

qemu-system-riscv64 -M virt -m 256M -display none -serial stdio \
	-kernel build/platform/qemu/virt/firmware/fw_payload.elf

or

qemu-system-riscv64 -M virt -m 256M -display none -serial stdio \
	-kernel build/platform/qemu/virt/firmware/fw_jump.elf \
	-device loader,file=<uboot_build_directory>/u-boot.bin,addr=0x80400000

Linux Kernel Payload

Note: We assume that Linux kernel is compiled using arch/riscv/configs/defconfig.

Build:

make PLATFORM=qemu/virt FW_PAYLOAD_PATH=<linux_build_directory>/arch/riscv/boot/Image

Run:

qemu-system-riscv64 -M virt -m 256M -display none -serial stdio \
	-kernel build/platform/qemu/virt/firmware/fw_payload.elf \
	-drive file=<path_to_linux_rootfs>,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 -display none -serial stdio \
	-kernel build/platform/qemu/virt/firmware/fw_jump.elf \
	-device loader,file=<linux_build_directory>/arch/riscv/boot/Image,addr=0x80400000 \
	-drive file=<path_to_linux_rootfs>,format=raw,id=hd0 \
	-device virtio-blk-device,drive=hd0 \
	-append "root=/dev/vda rw console=ttyS0"