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armvirt: update README with new image names

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The introduction of EFI support has changed how armvirt
images are generated. The kernel and filesystem binaries
can still be used as before with QEMU directly.

Signed-off-by: Mathew McBride <matt@traverse.com.au>
This commit is contained in:
Mathew McBride 2022-01-19 03:24:45 +00:00 committed by Petr Štetiar
parent eb0e61285d
commit 97c5d317f5
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1 changed files with 40 additions and 8 deletions
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48
target/linux/armvirt/README
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@ -1,21 +1,23 @@
This is intended to be used with OpenWrt project to provide image for use with
QEMU ARM virt machine.
This target generates images that can be used on ARM machines with EFI
support (e.g EDKII/TianoCore or U-Boot with bootefi).
The kernel and filesystem images can also be used directly by QEMU:
Run with qemu-system-arm
# boot with initramfs embedded in
qemu-system-arm -nographic -M virt -m 64 -kernel openwrt-armvirt-32-zImage-initramfs
qemu-system-arm -nographic -M virt -m 64 -kernel openwrt-armvirt-32-generic-initramfs-kernel.bin
# boot with accel=kvm
qemu-system-arm -nographic -M virt,accel=kvm -cpu host -m 64 -kernel
openwrt-armvirt-32-zImage-initramfs
openwrt-armvirt-32-generic-initramfs-kernel.bin
# boot with a separate rootfs
qemu-system-arm -nographic -M virt -m 64 -kernel openwrt-armvirt-32-zImage \
-drive file=openwrt-armvirt-32-root.ext4,format=raw,if=virtio -append 'root=/dev/vda rootwait'
qemu-system-arm -nographic -M virt -m 64 -kernel openwrt-armvirt-32-generic-kernel.bin \
-drive file=openwrt-armvirt-32-generic-ext4-rootfs.img,format=raw,if=virtio -append 'root=/dev/vda rootwait'
# boot with local dir as rootfs
qemu-system-arm -nographic -M virt -m 64 -kernel openwrt-armvirt-32-zImage \
qemu-system-arm -nographic -M virt -m 64 -kernel openwrt-armvirt-32-generic-kernel.bin \
-fsdev local,id=rootdev,path=root-armvirt/,security_model=none \
-device virtio-9p-pci,fsdev=rootdev,mount_tag=/dev/root \
-append 'rootflags=trans=virtio,version=9p2000.L,cache=loose rootfstype=9p'
@ -37,4 +39,34 @@ Run with kvmtool
The multi-platform ARMv8 target can be used with QEMU:
qemu-system-aarch64 -machine virt -cpu cortex-a57 -nographic \
-kernel openwrt-armvirt-64-Image-initramfs \
-kernel openwrt-armvirt-64-generic-initramfs-kernel.bin \
With a EDKII or U-Boot binary for the QEMU ARM virtual machines, you can use these
images in EFI mode:
32-bit:
gunzip -c bin/targets/armvirt/32/openwrt-armvirt-32-generic-ext4-combined.img.gz > openwrt-arm-32.img
qemu-system-arm -nographic \
-cpu cortex-a15 -machine virt \
-bios QEMU_EFI_32.fd \
-smp 1 -m 1024 \
-device virtio-rng-pci \
-drive file=openwrt-arm-32.img,format=raw,index=0,media=disk \
-netdev user,id=testlan -net nic,netdev=testlan \
-netdev user,id=testwan -net nic,netdev=testwan
64-bit:
gunzip -c bin/targets/armvirt/64/openwrt-armvirt-64-generic-ext4-combined.img.gz > openwrt-arm-64.img
qemu-system-aarch64 -nographic \
-cpu cortex-a53 -machine virt \
-bios QEMU_EFI_64.fd \
-smp 1 -m 1024 \
-device virtio-rng-pci \
-drive file=openwrt-arm-64.img,format=raw,index=0,media=disk \
-netdev user,id=testlan -net nic,netdev=testlan \
-netdev user,id=testwan -net nic,netdev=testwan
One can find EFI/BIOS binaries from:
- Compile mainline U-Boot for the QEMU ARM virtual machine (qemu_arm_defconfig/qemu_arm64_defconfig)
- From distribution packages (such as qemu-efi-arm and qemu-efi-aarch64 in Debian)
- Community builds, like retrage/edk2-nightly: https://retrage.github.io/edk2-nightly/