From 2594045cdd0bedc46d4d30693bd7cda4f94b8fda Mon Sep 17 00:00:00 2001
From: Manuel Bentele
Date: Thu, 30 Sep 2021 14:01:50 +0200
Subject: [qemu-src] Add module for QEMU source build

---
 .../multi-user.target.wants/qemu-kvm.service       |  1 +
 .../data/lib/systemd/system/qemu-kvm.service       | 16 ++++
 .../data/usr/share/qemu/init/qemu-kvm-init         | 89 ++++++++++++++++++++++
 core/modules/qemu-src/module.build                 | 61 +++++++++++++++
 core/modules/qemu-src/module.conf                  |  8 ++
 core/modules/qemu-src/module.conf.ubuntu           | 50 ++++++++++++
 .../qemu/data/etc/systemd/system/qemu.service      |  3 +
 core/modules/qemu/module.build                     |  3 -
 core/modules/qemu/module.conf                      |  1 +
 core/modules/qemu/module.conf.ubuntu               |  8 --
 core/targets/qemu/qemu-src                         |  1 +
 11 files changed, 230 insertions(+), 11 deletions(-)
 create mode 120000 core/modules/qemu-src/data/lib/systemd/system/multi-user.target.wants/qemu-kvm.service
 create mode 100644 core/modules/qemu-src/data/lib/systemd/system/qemu-kvm.service
 create mode 100644 core/modules/qemu-src/data/usr/share/qemu/init/qemu-kvm-init
 create mode 100644 core/modules/qemu-src/module.build
 create mode 100644 core/modules/qemu-src/module.conf
 create mode 100644 core/modules/qemu-src/module.conf.ubuntu
 create mode 120000 core/targets/qemu/qemu-src

diff --git a/core/modules/qemu-src/data/lib/systemd/system/multi-user.target.wants/qemu-kvm.service b/core/modules/qemu-src/data/lib/systemd/system/multi-user.target.wants/qemu-kvm.service
new file mode 120000
index 00000000..cd3c10f2
--- /dev/null
+++ b/core/modules/qemu-src/data/lib/systemd/system/multi-user.target.wants/qemu-kvm.service
@@ -0,0 +1 @@
+../qemu-kvm.service
\ No newline at end of file
diff --git a/core/modules/qemu-src/data/lib/systemd/system/qemu-kvm.service b/core/modules/qemu-src/data/lib/systemd/system/qemu-kvm.service
new file mode 100644
index 00000000..f35e3e98
--- /dev/null
+++ b/core/modules/qemu-src/data/lib/systemd/system/qemu-kvm.service
@@ -0,0 +1,16 @@
+[Unit]
+Description=QEMU KVM preparation - module, ksm, hugepages
+DefaultDependencies=no
+After=local-fs.target
+Before=shutdown.target
+Conflicts=shutdown.target
+RequiresMountsFor=/usr
+
+[Service]
+Type=oneshot
+RemainAfterExit=yes
+ExecStart=/usr/share/qemu/init/qemu-kvm-init start
+ExecReload=/usr/share/qemu/init/qemu-kvm-init start
+
+[Install]
+WantedBy=multi-user.target
diff --git a/core/modules/qemu-src/data/usr/share/qemu/init/qemu-kvm-init b/core/modules/qemu-src/data/usr/share/qemu/init/qemu-kvm-init
new file mode 100644
index 00000000..af00b718
--- /dev/null
+++ b/core/modules/qemu-src/data/usr/share/qemu/init/qemu-kvm-init
@@ -0,0 +1,89 @@
+#!/bin/sh
+
+# Detect our host arch
+arch=$(arch)
+test -z "$arch" && exit 0
+
+modlist=""
+case "$arch" in
+    x86_64 | i686)
+        kvm=/usr/bin/qemu-system-x86_64
+        if grep -qs "^flags.* vmx" /proc/cpuinfo; then
+            modlist="kvm_intel $KVM_NESTED"
+        elif grep -qs "^flags.* svm" /proc/cpuinfo; then
+            modlist="kvm_amd"
+        fi
+        ;;
+    ppc*)
+        SMT=$(/usr/sbin/ppc64_cpu --smt 2>&1 | grep "SMT=[248]")
+        if [ -n "$SMT" ]
+        then
+          if grep -q -e '^cpu\s*:\s*POWER8'  /proc/cpuinfo; then
+            echo "Error: You must disable SMT if you want to run QEMU/KVM on Power8 based ppc64le architecture"
+            echo "In order to disable SMT, run: # ppc64_cpu --smt=off"
+          fi
+        fi
+        kvm=/usr/bin/qemu-system-ppc64
+        if [ "$(uname -m)" != "ppc64le" ]; then
+            exit 0
+        fi
+        if systemd-detect-virt --quiet --vm; then
+            echo "Info: second level virtualization not supported, kvm-hv load might fail"
+        fi
+        modlist="kvm-hv"
+        ;;
+esac
+
+# Silently exit if the package isn't installed anymore
+if [ -z "$kvm" -o ! -e "$kvm" ]; then
+    exit 0
+fi
+
+# shellcheck disable=SC1091
+[ -r /etc/default/qemu-kvm ] && . /etc/default/qemu-kvm
+
+start() {
+    if [ -n "$modlist" ]; then
+        modprobe -b $modlist || true
+    fi
+
+    if systemd-detect-virt --quiet --container; then
+        mknod /dev/kvm c 10 232 || true
+        chown root:kvm /dev/kvm || true
+        chmod g+rw /dev/kvm || true
+    fi
+
+    # Determine if we are running inside a VM
+    IS_VM=0
+    if command -v systemd-detect-virt >/dev/null 2>&1; then
+        systemd-detect-virt -vq && IS_VM=1
+    fi
+
+    # Enable KSM, respecting the default configuration file. If 'AUTO' is
+    # set, enable only if we aren't running inside a VM.
+    if [ "$KSM_ENABLED" = "1" ] || [ "$KSM_ENABLED" = "AUTO" ] && [ "$IS_VM" = "0" ]; then
+        # shellcheck disable=SC2015
+        [ -w /sys/kernel/mm/ksm/run ] && echo 1 > /sys/kernel/mm/ksm/run || true
+        if [ -w /sys/kernel/mm/ksm/sleep_millisecs ]; then
+            if [ -n "$SLEEP_MILLISECS" ]; then
+                echo "$SLEEP_MILLISECS" > /sys/kernel/mm/ksm/sleep_millisecs || true
+            fi
+        fi
+    else
+        # shellcheck disable=SC2015
+        [ -w /sys/kernel/mm/ksm/run ] && echo 0 > /sys/kernel/mm/ksm/run || true
+    fi
+}
+
+# See how we were called.
+case "$1" in
+    start)
+        start
+    ;;
+
+    *)
+        exit 0
+    ;;
+esac
+
+exit $?
diff --git a/core/modules/qemu-src/module.build b/core/modules/qemu-src/module.build
new file mode 100644
index 00000000..5f3fce34
--- /dev/null
+++ b/core/modules/qemu-src/module.build
@@ -0,0 +1,61 @@
+#!/bin/bash
+fetch_source() {
+	autoclone
+	git -C "${MODULE_WORK_DIR}/src/qemu" submodule update --init || perror "Failed to init and update submodules!"
+
+	# patch EDK2 version to retrieve EDK2 submodules
+	git -C "${MODULE_WORK_DIR}/src/qemu/roms/edk2" checkout edk2-stable202108 || perror "Failed to checkout new EDK2 version!"
+	git -C "${MODULE_WORK_DIR}/src/qemu" commit -a -m "Update EDK2 to 08.2021 release" || perror "Failed to update EDK2 version!"
+
+	git -C "${MODULE_WORK_DIR}/src/qemu" submodule update --recursive || perror "Failed to update submodules recursivly!"
+}
+
+build() {
+	local SRCDIR="${MODULE_WORK_DIR}/src/qemu"
+	local DSTDIR="${MODULE_BUILD_DIR}"
+	cde "${SRCDIR}"
+
+	# install meson (>= 0.54.0) since packaged version is too old
+	pip3 install "meson>=0.54.0"
+
+	./configure \
+		--prefix="/usr" \
+		--sysconfdir="/etc" \
+		--libexecdir="/usr/libexec" \
+		--localstatedir="/var" \
+		--target-list=x86_64-softmmu \
+		--enable-kvm \
+		--disable-xen \
+		--enable-gnutls \
+		--enable-gtk \
+		--enable-vnc \
+		--enable-spice \
+		--enable-libusb \
+		--enable-usb-redir \
+		--enable-lzo \
+		--enable-zstd \
+		--enable-linux-aio \
+		--enable-opengl \
+		--enable-virglrenderer \
+		--enable-vhost-net \
+		--enable-vhost-user \
+		--enable-libudev \
+		--enable-brlapi \
+		--audio-drv-list="pa alsa" \
+		--enable-modules || perror "'configure' failed."
+	make || perror "'make' failed."
+	DESTDIR="${DSTDIR}" make install || perror "'make install' failed."
+
+	# change permissions for the bridge helper
+	chmod u+s "${DSTDIR}/usr/libexec/qemu-bridge-helper"
+
+	# change permission of setup script
+	chmod +x "${DSTDIR}/usr/share/qemu/init/qemu-kvm-init"
+
+	# delete empty run folder to prevent mltk from stopping
+	rm -rf "${DSTDIR}/var/run"
+}
+
+post_copy() {
+	:
+}
diff --git a/core/modules/qemu-src/module.conf b/core/modules/qemu-src/module.conf
new file mode 100644
index 00000000..3de2a5ec
--- /dev/null
+++ b/core/modules/qemu-src/module.conf
@@ -0,0 +1,8 @@
+#!/bin/bash
+
+REQUIRED_GIT="
+	https://gitlab.com/qemu-project/qemu.git||v6.1.0
+"
+
+# copy everything since there is a clean installation done by 'make install'
+REQUIRED_DIRECTORIES="/"
diff --git a/core/modules/qemu-src/module.conf.ubuntu b/core/modules/qemu-src/module.conf.ubuntu
new file mode 100644
index 00000000..9125813b
--- /dev/null
+++ b/core/modules/qemu-src/module.conf.ubuntu
@@ -0,0 +1,50 @@
+#!/bin/bash
+REQUIRED_INSTALLED_PACKAGES="
+	gcc
+	debhelper
+	device-tree-compiler
+	python3
+	python3-pip
+	ninja-build
+	libaio-dev
+	libpulse-dev
+	libasound2-dev
+	libbrlapi-dev
+	libcap-ng-dev
+	libcurl4-gnutls-dev
+	libfdt-dev
+	libgnutls28-dev
+	libgtk-3-dev
+	libvte-2.91-dev
+	libiscsi-dev
+	libncursesw5-dev
+	libvirglrenderer-dev
+	libepoxy-dev
+	libdrm-dev
+	libgbm-dev
+	libnuma-dev
+	libcacard-dev
+	libpixman-1-dev
+	librbd-dev
+	libsasl2-dev
+	libseccomp-dev
+	libslirp-dev
+	libspice-server-dev
+	librdmacm-dev
+	libibverbs-dev
+	libibumad-dev
+	libusb-1.0-0-dev
+	libusbredirparser-dev
+	libssh-dev
+	nettle-dev
+	uuid-dev
+	xfslibs-dev
+	zlib1g-dev
+	libudev-dev
+	libjpeg-dev
+	libpng-dev
+	libpmem-dev
+	libzstd-dev
+	libbz2-dev
+	libfuse3-dev
+"
diff --git a/core/modules/qemu/data/etc/systemd/system/qemu.service b/core/modules/qemu/data/etc/systemd/system/qemu.service
index 4d0e7a19..1776d63c 100644
--- a/core/modules/qemu/data/etc/systemd/system/qemu.service
+++ b/core/modules/qemu/data/etc/systemd/system/qemu.service
@@ -11,3 +11,6 @@ After=qemu-kvm.service
 Type=oneshot
 RemainAfterExit=yes
 ExecStart=/opt/openslx/scripts/systemd-qemu_env start
+
+[Install]
+WantedBy=graphical.target
diff --git a/core/modules/qemu/module.build b/core/modules/qemu/module.build
index 801d1d4b..cc7eaee0 100644
--- a/core/modules/qemu/module.build
+++ b/core/modules/qemu/module.build
@@ -25,7 +25,4 @@ post_copy() {
 	# change access rights of the qemu bridge helper config
 	chown root:kvm /etc/qemu/bridge.conf
 	chmod 0664 /etc/qemu/bridge.conf
-
-	# set UID to avoid operation not permitted errors
-	chmod u+s /usr/lib/qemu/qemu-bridge-helper
 }
diff --git a/core/modules/qemu/module.conf b/core/modules/qemu/module.conf
index 1e272eb4..d4169c39 100644
--- a/core/modules/qemu/module.conf
+++ b/core/modules/qemu/module.conf
@@ -1,6 +1,7 @@
 #!/bin/bash
 
 REQUIRED_MODULES="
+	qemu-src
 	libvirt
 	openjdk-8-jre-headless
 	looking-glass-client
diff --git a/core/modules/qemu/module.conf.ubuntu b/core/modules/qemu/module.conf.ubuntu
index 8edc5df4..1853bdf8 100644
--- a/core/modules/qemu/module.conf.ubuntu
+++ b/core/modules/qemu/module.conf.ubuntu
@@ -6,13 +6,5 @@ REQUIRED_INSTALLED_PACKAGES="
 "
 
 REQUIRED_CONTENT_PACKAGES="
-	qemu
-	qemu-kvm
-	qemu-system-common
-	qemu-system-arm
-	qemu-system-x86
-	qemu-utils
-	seabios
-	ovmf
 	jq
 "
diff --git a/core/targets/qemu/qemu-src b/core/targets/qemu/qemu-src
new file mode 120000
index 00000000..d50a48b1
--- /dev/null
+++ b/core/targets/qemu/qemu-src
@@ -0,0 +1 @@
+../../modules/qemu-src
\ No newline at end of file
-- 
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