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Meta: Detect nested KVM support for WSL2 and use that when available

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This allows running QEMU inside WSL2 for hosts which have nested KVM
and WSLg support (e.g. Windows 11).

Running QEMU inside the WSL2 VM is slightly slower than running QEMU
on Windows, probably because of how WSLg handles screen updates.
This commit is contained in:
Gunnar Beutner 2021-08-04 06:22:38 +02:00 committed by Andreas Kling
parent 723c89af67
commit d9d2287a11
Notes: sideshowbarker 2024-07-18 07:28:59 +09:00 
Author: https://github.com/gunnarbeutner
Commit: https://github.com/SerenityOS/serenity/commit/d9d2287a11f
Pull-request: https://github.com/SerenityOS/serenity/pull/9199
1 changed files with 19 additions and 8 deletions
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27
Meta/run.sh
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@ -10,7 +10,8 @@ die() {
#SERENITY_PACKET_LOGGING_ARG="-object filter-dump,id=hue,netdev=breh,file=e1000.pcap"
[ -e /dev/kvm ] && [ -r /dev/kvm ] && [ -w /dev/kvm ] && SERENITY_VIRT_TECH_ARG="-enable-kvm"
KVM_SUPPORT="0"
[ -e /dev/kvm ] && [ -r /dev/kvm ] && [ -w /dev/kvm ] && KVM_SUPPORT="1"
[ -z "$SERENITY_BOCHS_BIN" ] && SERENITY_BOCHS_BIN="bochs"
@ -41,10 +42,14 @@ if [ -z "$SERENITY_QEMU_BIN" ]; then
if command -v wslpath >/dev/null; then
QEMU_INSTALL_DIR=$(reg.exe query 'HKLM\Software\QEMU' /v Install_Dir /t REG_SZ | grep '^ Install_Dir' | sed 's/ / /g' | cut -f4- -d' ')
if [ -z "$QEMU_INSTALL_DIR" ]; then
die "Could not determine where QEMU for Windows is installed. Please make sure QEMU is installed or set SERENITY_QEMU_BIN if it is already installed."
if [ "$KVM_SUPPORT" -eq "0" ]; then
die "Could not determine where QEMU for Windows is installed. Please make sure QEMU is installed or set SERENITY_QEMU_BIN if it is already installed."
fi
else
KVM_SUPPORT="0"
QEMU_BINARY_PREFIX="$(wslpath -- "${QEMU_INSTALL_DIR}" | tr -d '\r\n')/"
QEMU_BINARY_SUFFIX=".exe"
fi
QEMU_BINARY_PREFIX="$(wslpath -- "${QEMU_INSTALL_DIR}" | tr -d '\r\n')/"
QEMU_BINARY_SUFFIX=".exe"
fi
if command -v "${QEMU_BINARY_PREFIX}qemu-system-x86_64${QEMU_BINARY_SUFFIX}" >/dev/null; then
SERENITY_QEMU_BIN="${QEMU_BINARY_PREFIX}qemu-system-x86_64${QEMU_BINARY_SUFFIX}"
@ -56,6 +61,8 @@ if [ -z "$SERENITY_QEMU_BIN" ]; then
fi
fi
[ "$KVM_SUPPORT" -eq "1" ] && SERENITY_VIRT_TECH_ARG="-enable-kvm"
[ -z "$SERENITY_KERNEL_CMDLINE" ] && SERENITY_KERNEL_CMDLINE="hello"
[ -z "$SERENITY_RAM_SIZE" ] && SERENITY_RAM_SIZE=512M
@ -90,6 +97,8 @@ if [ "$installed_major_version" -lt "$SERENITY_QEMU_MIN_REQ_VERSION" ]; then
die
fi
NATIVE_WINDOWS_QEMU="0"
if command -v wslpath >/dev/null; then
case "$SERENITY_QEMU_BIN" in
/mnt/?/*)
@ -102,6 +111,8 @@ if command -v wslpath >/dev/null; then
fi
[ -z "$SERENITY_QEMU_CPU" ] && SERENITY_QEMU_CPU="max,vmx=off"
SERENITY_KERNEL_CMDLINE="$SERENITY_KERNEL_CMDLINE disable_virtio"
NATIVE_WINDOWS_QEMU="1"
;;
esac
fi
@ -115,7 +126,7 @@ fi
if [ "$(uname)" = "Darwin" ]; then
SERENITY_AUDIO_BACKEND="-audiodev coreaudio,id=snd0"
elif command -v wslpath >/dev/null; then
elif [ "$NATIVE_WINDOWS_QEMU" -eq "1" ]; then
SERENITY_AUDIO_BACKEND="-audiodev dsound,id=snd0"
elif "$SERENITY_QEMU_BIN" -audio-help 2>&1 | grep -- "-audiodev id=sdl" >/dev/null; then
SERENITY_AUDIO_BACKEND="-audiodev sdl,id=snd0"
@ -130,15 +141,15 @@ else
fi
SERENITY_SCREENS="${SERENITY_SCREENS:-1}"
if [ "$SERENITY_SPICE" ]; then
if [ "$SERENITY_SPICE" ]; then
SERENITY_QEMU_DISPLAY_BACKEND="${SERENITY_QEMU_DISPLAY_BACKEND:-spice-app}"
elif command -v wslpath >/dev/null; then
elif [ "$NATIVE_WINDOWS_QEMU" -eq "1" ]; then
# QEMU for windows does not like gl=on, so detect if we are building in wsl, and if so, disable it
# Also, when using the GTK backend we run into this problem: https://github.com/SerenityOS/serenity/issues/7657
SERENITY_QEMU_DISPLAY_BACKEND="${SERENITY_QEMU_DISPLAY_BACKEND:-sdl,gl=off}"
elif [ $SERENITY_SCREENS -gt 1 ] && "${SERENITY_QEMU_BIN}" --display help | grep -iq sdl; then
SERENITY_QEMU_DISPLAY_BACKEND="${SERENITY_QEMU_DISPLAY_BACKEND:-sdl,gl=off}"
elif ("${SERENITY_QEMU_BIN}" --display help | grep -iq sdl) && (ldconfig -p | grep -iq virglrenderer); then
elif ! command -v wslpath >/dev/null && ("${SERENITY_QEMU_BIN}" --display help | grep -iq sdl) && (ldconfig -p | grep -iq virglrenderer); then
SERENITY_QEMU_DISPLAY_BACKEND="${SERENITY_QEMU_DISPLAY_BACKEND:-sdl,gl=on}"
elif "${SERENITY_QEMU_BIN}" --display help | grep -iq cocoa; then
# QEMU for OSX seems to only support cocoa