Documentation and structure
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Imbus
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1 changed files with 47 additions and 23 deletions
70
makefile
70
makefile
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# Inspired by https://www.codemadness.org/openbsd-riscv64-vm.html
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# mirror list: https://www.openbsd.org/ftp.html
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# mirror := https://mirror.hs-esslingen.de/pub/OpenBSD/
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mirror := https://ftp.lysator.liu.se/pub/OpenBSD/
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# Version of OpenBSD to install
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release := 7.5
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release_short := $(shell echo ${release} | sed 's/\.//g')# Without dots (7.5 -> 75)
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diskname := openBSD$(release_short).qcow2
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# Name of the disk image, named after the release
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vmname := openBSD$(release_short)
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diskname := $(vmname).qcow2
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# Timestamp used for backup
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UNIXTIME := $(shell date +%s)
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# These are the packages that will be fetched from the OpenBSD mirror
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opensbiname := opensbi-1.2.tgz
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ubootname := u-boot-riscv64-2021.10p8.tgz
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# PK used for release (not package, apparently) verification.
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# Note that this is explicitly fetched from the OpenBSD mirror.
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release_pubkey := openbsd-$(release_short)-base.pub
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release_pubkey_url := https://ftp.openbsd.org/pub/OpenBSD/7.5/$(release_pubkey)
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release_pubkey_url := https://ftp.openbsd.org/pub/OpenBSD/$(release)/$(release_pubkey)
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# Specify how we want curl to behave
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CURL := @curl --progress-bar -O
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# The miniroot image is the installer image
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minirootname := miniroot$(release_short).img
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# QEMU arguments
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QEMU_ARGS := -machine virt -nographic -m 2048M -smp 2
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QEMU_ARGS += -bios share/opensbi/generic/fw_jump.bin
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QEMU_ARGS += -kernel share/u-boot/qemu-riscv64_smode/u-boot.bin
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QEMU_ARGS += -netdev user,id=net0,ipv6=off -device virtio-net-device,netdev=net0
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QEMU_ARGS += -drive file=$(diskname),format=qcow2,id=hd0 -device virtio-blk-device,drive=hd0
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# Fetch the public key used to verify the release
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$(release_pubkey):
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$(CURL) ${release_pubkey_url}
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# Fetch the miniroot image and its checksums -> verify with signify
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$(minirootname): $(release_pubkey)
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$(CURL) ${mirror}/${release}/riscv64/${minirootname}
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$(CURL) ${mirror}/${release}/riscv64/SHA256
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$(CURL) ${mirror}/${release}/riscv64/SHA256.sig
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signify -C -p ${release_pubkey} -x SHA256.sig $(minirootname)
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# Allocate a qcow2 disk image, this is analogous to a hard drive
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$(diskname):
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qemu-img create -f qcow2 ${diskname} 10G
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# Fetches the amd64 repository keys and checksums
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repokeys: $(release_pubkey)
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$(CURL) ${mirror}/${release}/packages/amd64/SHA256
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$(CURL) ${mirror}/${release}/packages/amd64/SHA256.sig
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# Verify the checksums of the packages in the current directory
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checksums: repokeys
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cksum -a sha256 --ignore-missing -c SHA256
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# Fetch OpenSBI
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$(opensbiname): repokeys
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$(CURL) ${mirror}/${release}/packages/amd64/${opensbiname}
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@# signify -C -p ${release_pubkey} -x SHA256.sig $(opensbiname)
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@tar -xzf ${opensbiname} share/opensbi/generic/fw_jump.bin
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# Fetch U-Boot
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$(ubootname): repokeys
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$(CURL) ${mirror}/${release}/packages/amd64/${ubootname}
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@# signify -C -p ${release_pubkey} -x SHA256.sig $(ubootname)
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@tar -xzf ${ubootname} share/u-boot/qemu-riscv64_smode/u-boot.bin
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# Installer pulls all the pieces together and starts the VM with the installer attached as a drive (with correct boot order)
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installer: $(minirootname) $(diskname) $(opensbiname) $(ubootname)
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make checksums
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@echo "Starting VM with installer..."
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@qemu-system-riscv64 \
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-machine virt \
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-nographic \
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-m 2048M \
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-smp 2 \
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-bios share/opensbi/generic/fw_jump.bin \
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-kernel share/u-boot/qemu-riscv64_smode/u-boot.bin \
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-drive file=$(minirootname),format=raw,id=cd0 -device virtio-blk-device,drive=cd0 \
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-drive file=$(diskname),format=qcow2,id=hd0 -device virtio-blk-device,drive=hd0 \
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-netdev user,id=net0,ipv6=off -device virtio-net-device,netdev=net0
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@qemu-system-riscv64 -drive file=$(minirootname),format=raw,id=cd0 -device virtio-blk-device,drive=cd0 $(QEMU_ARGS)
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# Run doesn't fetch anything, it just starts the VM with the disk (qcow2) image
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run:
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@echo "Starting VM from disk image..."
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@qemu-system-riscv64 \
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-machine virt \
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-nographic \
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-m 2048M \
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-smp 2 \
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-bios share/opensbi/generic/fw_jump.bin \
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-kernel share/u-boot/qemu-riscv64_smode/u-boot.bin \
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-drive file=$(diskname),format=qcow2,id=hd0 -device virtio-blk-device,drive=hd0 \
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-netdev user,id=net0,ipv6=off -device virtio-net-device,netdev=net0
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@qemu-system-riscv64 $(QEMU_ARGS)
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# Creates a compressed archive of the disk image
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backup:
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@echo "Backing up disk image..."
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qemu-img convert -c -O qcow2 $(diskname) $(vmname)_$(UNIXTIME).qcow2
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qemu-img info $(vmname)_$(UNIXTIME).qcow2
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tar -czvf $(vmname)_$(UNIXTIME).tar.gz $(vmname)_$(UNIXTIME).qcow2
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# Clean up the directory
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clean:
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rm -f ${minirootname} ${diskname} ${opensbiname} ${ubootname} ${release_pubkey} SHA256 SHA256.sig
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rm -rf share
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.PHONY: installer run clean
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# Clean, but also remove backups and disk images
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superclean: clean
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rm -f $(vmname)_*.qcow2 $(vmname)_*.tar.gz
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.PHONY: installer run clean backup
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