vm/app/lynx: move to monorepo path

1 files changed, 130 insertions, 0 deletions

diff --git a/vm/app/lynx/Makefile b/vm/app/lynx/Makefile
new file mode 100644
index 0000000..d68e287
--- /dev/null
+++ b/vm/app/lynx/Makefile
@@ -0,0 +1,130 @@
+# SPDX-License-Identifier: EUPL-1.2
+# SPDX-FileCopyrightText: 2021 Alyssa Ross <hi@alyssa.is>
+
+# qemu-kvm is non-standard, but is present in at least Fedora and
+# Nixpkgs.  If you don't have qemu-kvm, you'll need to set e.g.
+# QEMU_KVM = qemu-system-x86_64 -enable-kvm.
+QEMU_KVM = qemu-kvm
+CLOUD_HYPERVISOR = cloud-hypervisor
+
+VMM = qemu
+
+# These don't have the host/ prefix because they're not referring to
+# paths in the source tree.
+HOST_S6_RC_DIRECTORIES = s6-rc/appvm-lynx-vmm/env
+
+HOST_S6_RC_FILES = \
+	host/s6-rc/appvm-lynx-vmm/data/pid2mac \
+	host/s6-rc/appvm-lynx-vmm/dependencies \
+	host/s6-rc/appvm-lynx-vmm/notification-fd \
+	host/s6-rc/appvm-lynx-vmm/run \
+	host/s6-rc/appvm-lynx-vmm/type \
+	host/s6-rc/appvm-lynx/dependencies \
+	host/s6-rc/appvm-lynx/run \
+	host/s6-rc/appvm-lynx/type
+
+HOST_S6_RC_BUILD_FILES = \
+	build/host/data/appvm-lynx/rootfs.ext4 \
+	build/host/data/appvm-lynx/vmlinux
+
+# We produce an s6-rc source directory, but that doesn't play nice
+# with Make, because it won't know to update if some file in the
+# directory is changed, or a file is created or removed in a
+# subdirectory.  Using the whole source directory could also end up
+# including files that aren't intended to be part of the input, like
+# temporary editor files or .license files.  So for all these reasons,
+# only explicitly listed files are included in the build result.
+build/svc: $(HOST_S6_RC_FILES) $(HOST_S6_RC_BUILD_FILES)
+	rm -rf $@
+	mkdir -p $@
+
+	tar -c $(HOST_S6_RC_FILES) | tar -C $@ -x --strip-components 1
+	tar -c $(HOST_S6_RC_BUILD_FILES) | tar -C $@ -x --strip-components 2
+	cd $@ && mkdir -p $(HOST_S6_RC_DIRECTORIES)
+
+build/host/data/appvm-lynx/vmlinux: $(VMLINUX)
+	mkdir -p $$(dirname $@)
+	cp $(VMLINUX) $@
+
+# tar2ext4 will leave half a filesystem behind if it's interrupted
+# half way through.
+build/host/data/appvm-lynx/rootfs.ext4: build/rootfs.tar
+	mkdir -p $$(dirname $@)
+	tar2ext4 -i build/rootfs.tar -o $@.tmp
+	mv $@.tmp $@
+
+VM_FILES = \
+	etc/fstab \
+	etc/init \
+	etc/mdev.conf \
+	etc/mdev/iface \
+	etc/passwd \
+	etc/resolv.conf
+
+# These are separate because they need to be included, but putting
+# them as make dependencies would confuse make.
+VM_LINKS = bin etc/ssl/certs/ca-certificates.crt
+
+VM_BUILD_FILES = build/etc/s6-rc
+VM_MOUNTPOINTS = dev run proc sys
+
+build/rootfs.tar: $(PACKAGES_TAR) $(VM_FILES) $(VM_BUILD_FILES)
+	cp --no-preserve=mode -f $(PACKAGES_TAR) $@
+	tar $(TARFLAGS) --append -f $@ $(VM_FILES) $(VM_LINKS)
+	echo $(VM_BUILD_FILES) | cut -d/ -f2 | \
+	    tar $(TARFLAGS) --append -f $@ -C build -T -
+	for m in $(VM_MOUNTPOINTS); do \
+	    tar $(TARFLAGS) --append -hf $@ --xform="s,.*,$$m," /var/empty ; \
+	done
+	tar $(TARFLAGS) --append -hf $@ --xform='s,.*,etc/service,' /var/empty
+
+VM_S6_RC_FILES = \
+	etc/s6-rc/lynx/run \
+	etc/s6-rc/lynx/type \
+	etc/s6-rc/mdevd-coldplug/dependencies \
+	etc/s6-rc/mdevd-coldplug/type \
+	etc/s6-rc/mdevd-coldplug/up \
+	etc/s6-rc/mdevd/notification-fd \
+	etc/s6-rc/mdevd/run \
+	etc/s6-rc/mdevd/type \
+	etc/s6-rc/ok-all/contents \
+	etc/s6-rc/ok-all/type
+
+build/etc/s6-rc: $(VM_S6_RC_FILES)
+	mkdir -p $$(dirname $@)
+	rm -rf $@
+
+	dir=$$(mktemp -d) && \
+	    tar -c $(VM_S6_RC_FILES) | tar -C $$dir -x --strip-components 2 && \
+	    s6-rc-compile $@ $$dir; \
+	    exit=$$?; rm -r $$dir; exit $$exit
+
+run-qemu: build/host/data/appvm-lynx/rootfs.ext4
+	$(QEMU_KVM) -m 128 -cpu host -machine q35,kernel=$(KERNEL) -vga none \
+	  -drive file=build/host/data/appvm-lynx/rootfs.ext4,if=virtio,format=raw,readonly=on \
+	  -append "console=ttyS0 root=/dev/vda" \
+	  -netdev user,id=net0 \
+	  -device virtio-net,netdev=net0,mac=0A:B3:EC:00:00:00 \
+	  -chardev pty,id=virtiocon0 \
+	  -device virtio-serial-pci \
+	  -device virtconsole,chardev=virtiocon0
+.PHONY: run-qemu
+
+run-cloud-hypervisor: build/host/data/appvm-lynx/rootfs.ext4
+	$(CLOUD_HYPERVISOR) \
+	    --api-socket path=vmm.sock \
+	    --memory size=128M
+	    --disk path=build/host/data/appvm-lynx/rootfs.ext4,readonly=on \
+	    --net tap=tap0,mac=0A:B3:EC:00:00:00 \
+	    --kernel $(KERNEL) \
+	    --cmdline "console=ttyS0 root=/dev/vda" \
+	    --console pty \
+	    --serial tty
+.PHONY: run-cloud-hypervisor
+
+run: run-$(VMM)
+.PHONY: run
+
+clean:
+	rm -rf build
+.PHONY: clean