Enable SVM emulation on x86

Signed-off-by: Stefano Stabellini <sstabellini@kernel.org>

Work-around Xen crash at boot time in QEMU without VMX emulation

and disable VMX emulation and KVM by default in the runtime scripts.

Signed-off-by: Stefano Stabellini <sstabellini@kernel.org>

Introduce runtime support for aarch64

Introduce two new containers:
- qemu-system-aarch64-builder: it builds a qemu system binary capable
  of running Xen on ARM
- qemu-system-aarch64: the runnable container with the
  qemu-system-aarch64 binary and the run script

Signed-off-by: Stefano Stabellini <sstabellini@kernel.org>

Add support for runtime QEMU containers

Introduce an option to build an Alpine based container with QEMU to run
the output image (nested virtualization).

Signed-off-by: Stefano Stabellini <sstabellini@kernel.org>

Introduce a second domain build

Signed-off-by: Stefano Stabellini <sstabellini@kernel.org>

Add flex and bison as QEMU build dependencies

Signed-off-by: Stefano Stabellini <sstabellini@kernel.org>

The Linux build doesn't depend on the Xen and QEMU build. Make it independent.

Signed-off-by: Stefano Stabellini <sstabellini@kernel.org>

Clearly specify Alpine Linux version to use

Signed-off-by: Stefano Stabellini <sstabellini@kernel.org>

Use LinuxKit for the build, when available

Signed-off-by: Stefano Stabellini <sstabellini@kernel.org>

Make the build system LinuxKit ready

Signed-off-by: Stefano Stabellini <sstabellini@kernel.org>

Add support for overlayfs

Signed-off-by: Stefano Stabellini <sstabellini@kernel.org>

Build each container in in its own subdir

Not only it is cleaner, but it makes linuxkit integration easier.

Signed-off-by: Stefano Stabellini <sstabellini@kernel.org>

Rename build.docker to Dockerfile

It will make it easier to use linuxkit for versioning in the future

Signed-off-by: Stefano Stabellini <sstabellini@kernel.org>

Add clean_all scripts to remove all build containers.

Signed-off-by: Stefano Stabellini <sstabellini@kernel.org>

Parametrize mkimage build

Signed-off-by: Stefano Stabellini <sstabellini@kernel.org>

Parametrize the alpine-dom0 build

Use a series file to get the build order, rather than hardcoding it in
build.sh.

Signed-off-by: Stefano Stabellini <sstabellini@kernel.org>

Match containers labels with directory names

Signed-off-by: Stefano Stabellini <sstabellini@kernel.org>

Run xencommons at boot time

OpenRC doesn't support xencommons. For now, add a local.d script to
start xencommons manually at boot.

Signed-off-by: Stefano Stabellini <sstabellini@kernel.org>

Fix QEMU installation

qemu-xen is run from /usr/lib/xen/bin.

Signed-off-by: Stefano Stabellini <sstabellini@kernel.org>

Fix indentation and rc-update initializations

Signed-off-by: Stefano Stabellini <sstabellini@kernel.org>

sync after writing image to avoid corruptions

Signed-off-by: Stefano Stabellini <sstabellini@kernel.org>

Make dom0 rootfs rw and rename to MojoOS

Signed-off-by: Stefano Stabellini <sstabellini@kernel.org>

Use "getconf _NPROCESSORS_ONLN" instead of hardcoding -j4

Signed-off-by: Stefano Stabellini <sstabellini@kernel.org>

Split dom0 build and mkimage build in smaller pieces

Signed-off-by: Stefano Stabellini <sstabellini@kernel.org>

Split out dom0 and mkimage builds from the main build script

Signed-off-by: Stefano Stabellini <sstabellini@kernel.org>

Various renames to clarify the purpose of each component

Signed-off-by: Stefano Stabellini <sstabellini@kernel.org>

Fix getty listening terminals

Add hvc0 to both securetty and inittab.

Signed-off-by: Stefano Stabellini <sstabellini@kernel.org>

Don't export dom0 rootfs to the host

Don't export the dom0 rootfs to the host, use COPY --from to import it
directly from the previous build container.

Signed-off-by: Stefano Stabellini <sstabellini@kernel.org>

Build Xen, tools and kernel from Docker build

No need to run "xen-builder" anymore. The build is done at "docker
build" time. The output is not copied back to the host, it is imported
directly into the dom0 container using COPY --from.

Signed-off-by: Stefano Stabellini <sstabellini@kernel.org>

More consistent containers label names

Signed-off-by: Stefano Stabellini <sstabellini@kernel.org>

Use out/ consistently

All build products go to the out/ directory

Signed-off-by: Stefano Stabellini <sstabellini@kernel.org>

Rename grub-build to image-build

Signed-off-by: Stefano Stabellini <sstabellini@kernel.org>

Remove unused scripts and lib.sh

Signed-off-by: Stefano Stabellini <sstabellini@kernel.org>

Fix image build: include dom0 rootfs

Signed-off-by: Stefano Stabellini <sstabellini@kernel.org>

Build Linux kernel as part of the Dom0 build

Signed-off-by: Stefano Stabellini <sstabellini@kernel.org>

Containerized image build

Signed-off-by: Stefano Stabellini <sstabellini@kernel.org>
Signed-off-by: Gianluca Guida <gianluca@zededa.com>

Rename dockerfiles to dom0

Signed-off-by: Stefano Stabellini <sstabellini@kernel.org>

Don't allocate the image disk twice

Signed-off-by: Stefano Stabellini <sstabellini@kernel.org>

Fix alpine-build-script

Download release tarball instead of git clone.
Apply patches as necessary.
Build QEMU against the Xen install dir (as oppused to the Xen build
dir).

Signed-off-by: Stefano Stabellini <sstabellini@kernel.org>

Add curl to alpine-build

So that we can download release tarballs at build time.

Signed-off-by: Stefano Stabellini <sstabellini@kernel.org>

Fix alpine-build syntax

Add missing continuation marks.

Signed-off-by: Stefano Stabellini <sstabellini@kernel.org>

Add sleep script as a workaround to save a Docker image

It will be used to start the container "sleeping", so that we can use
docker export and extract a rootfs from it.

Signed-off-by: Stefano Stabellini <sstabellini@kernel.org>

Improve image build

Signed-off-by: Stefano Stabellini <sstabellini@kernel.org>

Add networking setup

Signed-off-by: Stefano Stabellini <sstabellini@kernel.org>

Import library functions and utils for image management

Signed-off-by: Stefano Stabellini <sstabellini@kernel.org>

Add LICENSE file

Signed-off-by: Stefano Stabellini <sstabellini@kernel.org>

Initial commit: Alpine Linux based Xen builder

Signed-off-by: Stefano Stabellini <sstabellini@kernel.org>