Vulkan 1.3 and Steam support on Ubuntu Asahi

Recently on XDC 2024, Alyssa Rosenzweig announced support for Vulkan 1.3 in Mesa, as well as gaming in Steam, using muvm (ex krunvm) and FEX: https://asahilinux.org/2024/10/aaa-gaming-on-asahi-linux/

Vulkan

To get started, you need to run apt update && apt upgrade and should get:
mesa 24.2.0~pre20241006-1asahi2.24.04

Mesa should bring you Vulkan 1.3 support:

$ vulkaninfo | grep -C1 HoneykrispWARNING:
 driverID         = DRIVER_ID_MESA_AGXV
 driverName       = Honeykrisp
 driverInfo       = Mesa 24.2.0~pre20241006-1asahi2.24.04

Steam

Steam is a bit more complicated, as it depends on multiple components, which are not all packaged in Ubuntu yet.
We'll install them to /usr/local for now.

Virglrenderer

apt install virglrenderer should install virglrenderer 1.0.1~asahi-20240925-1asahi1.24.04

Sommelier

Based on https://src.fedoraproject.org/rpms/chromiumos-platform/blob/rawhide/f/chromiumos-platform.spec

$ mkdir -p asahi
$ cd asahi
$ git clone https://chromium.googlesource.com/chromiumos/platform2.git sommelier
$ cd sommelier
$ git checkout 67bc17ea79b4ff1b449053e5fcf3375ff6b30690
$ cd sommelier/vm_tools/sommelier

$ wget https://src.fedoraproject.org/rpms/chromiumos-platform/raw/rawhide/f/0001-Revert-sommelier-bump-up-CROSS_DOMAIN_MAX_IDENTIFIER.patch
$ wget https://src.fedoraproject.org/rpms/chromiumos-platform/raw/rawhide/f/0002-vm_tools-sommelier-align-mem-operations-to-16K.patch
$ wget https://src.fedoraproject.org/rpms/chromiumos-platform/raw/rawhide/f/0003-vm_tools-sommelier-don-t-call-to-fixup_plane0.patch
$ wget https://src.fedoraproject.org/rpms/chromiumos-platform/raw/rawhide/f/0004-vm_tools-sommelier-Do-not-assert-on-unsued-wayland-i.patch
$ patch -p3 <0001-Revert-sommelier-bump-up-CROSS_DOMAIN_MAX_IDENTIFIER.patch 
$ patch -p3 <0002-vm_tools-sommelier-align-mem-operations-to-16K.patch 
$ patch -p3 <0003-vm_tools-sommelier-don-t-call-to-fixup_plane0.patch 
$ patch -p3 <0004-vm_tools-sommelier-Do-not-assert-on-unsued-wayland-i.patch

$ mkdir build
$ meson -Dxwayland_path=/usr/bin/Xwayland -Dgamepad=true -Dquirks=true -Dwith_tests=false build
$ ninja -C build
$ sudo cp build/sommelier /usr/local/bin/sommelier

Rust

$ curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh -s -- -y
$ . "$HOME/.cargo/env"

libkrunfw

$ cd asahi
$ git clone https://github.com/containers/libkrunfw.git
$ cd libkrunfw
$ GPU=1 VIRGL_RESOURCE_MAP2=1 BLK=1 NET=1 SND=1 make
$ sudo make install

libkrun

$ cd asahi
$ git clone https://github.com/containers/libkrun.git
$ cd libkrun
$ echo '    println!("cargo:rustc-link-arg=-L/usr/local/lib64");' >> src/libkrun/build.rs
$ make
$ sudo make install

muvm

$ cd asahi
$ git clone https://github.com/AsahiLinux/muvm.git
$ cd muvm
$ echo '    println!("cargo:rustc-link-arg=-L/usr/local/lib64");' >> crates/krun-sys/build.rs
$ cargo build --release
$ sudo cp target/release/muvm /usr/local/bin/
$ sudo cp target/release/muvm-guest /usr/local/bin/
$ sudo cp target/release/muvm-server /usr/local/bin/

hidpipe

$ cd asahi
$ git clone https://github.com/AsahiLinux/hidpipe.git
$ cd hidpipe
$ cargo build --release
$ sudo cp target/release/hidpipe-client /usr/local/bin/
$ sudo cp target/release/hidpipe-server /usr/local/bin/

FEX

$ sudo add-apt-repository ppa:fex-emu/fex
$ sudo apt install fex-emu-armv8.4 fex-emu-binfmt64 fex-emu-binfmt32

FEX root fileystem

FEX needs a root filesystem based on the same Ubuntu release that is running locally, but with i386 and amd64 packages, in order to support 32 and 64 bit applications.

A FEX root fs can be created with https://github.com/FEX-Emu/RootFS but needs to few customizations, in order to have the same mesa version in the VM as locally.

TODO

Steam

Based on https://pagure.io/fedora-asahi/steam/blob/main/f/steam.spec

$ cd asahi
$ git clone https://pagure.io/fedora-asahi/steam.git
$ sudo apt install python3-pyqt6

Launch Steam

Run a Python wrapper to start hidpipe, FEXBash inside muvm and execute Steam's launch script at ~/.local/share/fex-steam/steam-launcher/bin_steam.sh

$ LD_LIBRARY_PATH=/usr/local/lib64 python3 asahi/steam/shim.py

Unfortunately, this doesn't work properly yet, because the FEX root fs has a known bug causing dhcpcd to not create /etc/resolv.conf, resulting in failing DNS resolution in FEX. So you won't be able to install/update anything in Steam.

For now, we'll have to do things a bit manually:

$ echo '~/.local/share/fex-steam/steam-launcher/bin_steam.sh -cef-force-occlusion -cef-force-opaque-backgrounds -gamepadui' >~/.local/share/fex-steam/steam-launcher/launch.sh
$ chmod +x ~/.local/share/fex-steam/steam-launcher/launch.sh
$ hidpipe-server &
$ LD_LIBRARY_PATH=/usr/local/lib64 muvm bash
$ echo "nameserver 1.1.1.1" >/etc/resolv.conf
$ FEXBash -c ~/.local/share/fex-steam/steam-launcher/launch.sh