I bought M1 MacBook Air. It is the fastest computer I have, and I have been a GNOME/GNU/Linux user for long time. It is obvious conclusion that I need practical Linux desktop environment on Apple Silicon.
Fortunately, Linux already works on Apple Silicon/M1. But how practical is it?
- Two native ports exist.
- Corellium. It is obsolete. https://corellium.com/blog/linux-m1
- Asahi Linux. It is greatly improving and may be usable for certain workloads, but it lacks e.g. graphics acceleration for now. https://asahilinux.org
- QEMU can run code on CPU natively. But what about GPU? Unfortunately, QEMU is also not optimized so much for macOS.
As I needed Linux desktop right now, I decided to hack QEMU. The most difficult challenge is obviously accelerated graphics, but there is Virgil 3D; a bridge to expose host OpenGL to the guest. https://virgil3d.github.io
It unfortunately didn't work on macOS host. So I just made it work. That's it. Here is a video demonstrating OpenGL on Linux on Apple Silicon/M1:
https://www.youtube.com/watch?v=k0bVlVQU2JQ&list=PLesZxBYUPr3wdU3sONUv4Q7UDOg1Dn_Ue&index=4
- Added OpenGL support.
- Enforced pixel by pixel display.
- Added cursor composition.
- Improved key mappings (e.g. Japanese IME keys, 2021-06-17)
- File locking on macOS is fixed. (2021-07-07, Add
file.locking=ontodriveto prevent drive breakage in case you concurrently launch the same virtual machine by mistake.)
- Fix device change (2022-02-26)
Improved OpenGL ES support.
It is independently maintained so may be a bit older, but you may still find it useful.
https://github.com/knazarov/homebrew-qemu-virgl
1. Open a terminal.
2. Install GLib, Meson, Pixman, pkg-config and spice-protocol with Homebrew.
brew install glib meson pixman pkg-config spice-protocol3. Make a empty directory and change the working directory to it.
4.
curl -L https://gist.github.com/akihikodaki/87df4149e7ca87f18dc56807ec5a1bc5/raw/0a71a44d97f2d8e5199b529b00b2d00721f32f59/run.sh | bash -5.
bin/qemu-img create var/virtio.raw 64GIt doesn't consume the physical space until it has data, so you can make the image very large. However, you will see odd behavior if you try to write data more than the physical disk allows.
6.
curl -LO https://download.fedoraproject.org/pub/alt/releases/39/respins/Silverblue/aarch64/Fedora-Silverblue-ostree-aarch64-39-1.5-respin.iso8.
./run -cdrom Fedora-Silverblue-ostree-aarch64-39-1.5-respin.isoProceed the installation process, and now you can run Fedora by executing ./run.
Note: you won't get keyboard to work before Linux boots because TianoCore, the UEFI firmware does not support virtio-keyboard used in this configuration.
Just download the latest run.sh and execute it in your workspace directory.
Edit run.
gl=offwill disable Virgil 3D GPU. Most stable but laggy.gl=corewill enable OpenGL.framework. Unstable.gl=eswill enable ANGLE. Stable and fast.
Upstreaming is in progress. Hopefully the features I implemented will work just
by running brew install qemu in the future.
- Epoxy: anholt/libepoxy#239
- QEMU: https://patchew.org/search?q=project%3AQEMU+from%3Aakihiko.odaki%40gmail.com
- Virgil 3D renderer: https://gitlab.freedesktop.org/virgl/virglrenderer/-/merge_requests?scope=all&utf8=✓&state=all&author_username=akihiko.odaki
This QEMU modification is not secure. The graphics acceleration code lives in the same process with everything else of the virtual machine and it is huge; the graphics stack involves LLVM for shader compilation, and a simple bug in the stack can lead to complete takeover of the guest.
vhost-user-gpu provides graphics acceleration isolation, but it needs modifications to run outside Linux because:
- historically, vhost-user is a re-implementation of Linux kernel's vhost interface, and it relies on kernel headers for interface definitions and
- vhost-user uses eventfd which is only available on Linux.
It shouldn't be difficult, but I'm satisfied even without process isolation so I don't. The graphics acceleration process would be still shared and it would remain possible that one graphical process exploit leads to disclosure of the entire graphics output anyway.
As I described here, such a virtualization software is practical and efficient approach to run Linux desktop. The performance overhead is also acceptable for daily use, and it even provides better integration of Linux and macOS. For example, you can switch macOS and Linux with three-finger gesture on trackpad. You can use VirtFS.
However, there are complexities that such a virtualization adds. It basically means sharing one hardware with two systems, so you have to allocate the resource properly or it ends up with bad user experience. The allocation problem happens everywhere (HID like keyboard, computing resource like CPU, power management, etc.). This approach is efficient but not the best.
In long term, native Linux port is the best option. Asahi Linux is promising and you may find it favorable than my modified QEMU for your use case even today.
I checked
qemu/meson.build, foundvhost-user can be explicitly enabled on macOS. Not bad, until...
Oppps! vhost-user-gpu available only on Linux!