this guide was working well a few years ago with slackware 14.2. but with recent XEN versions, python 3 is required. also, we now have GCC 11 in slackware current. also, python-ninja is now required by xen or qemu-xen.
see the new guide for building all this on current
Compilation was done on some enterprise-class IBM servers dating 2007 with 4x4 Xeon processors and 96 GB to 128 GB of RAM. For 16 cores in total and with 1 thread per core (lscpu), I obtained the fastest results with -j16 for xen versus -j24 for tools and stubdom. Anyway, tune the number of make jobs according to your hardware.
assuming the essential tools for building software installed already
in case you’re running a minimal system
slackpkg install \
bison \
dev86 \
cmake-3 \
flex \
gc \
git \
glibc-2 \
libarchive \
lzo \
openssl \
patch-2 \
pixman \
pciutils \
python3 \
texinfo \
zlib-1
pexpect \
ptyprocess \
python3-ninja \
python3-skbuild \
syslinux \
ucl \
upx \
wheel \
and additional packages from SBo
sbopkg -i acpica
sbopkg -i yajl
ver=4.x.x
fetch the latest release tarball
wget https://downloads.xenproject.org/release/xen/$ver/xen-$ver.tar.gz wget https://downloads.xenproject.org/release/xen/$ver/xen-$ver.tar.gz.sig gpg --keyserver keyserver.ubuntu.com --recv-key 57E82BD9 gpg xen-$ver.tar.gz.sig
with fingerpring
Primary key fingerprint: 23E3 222C 145F 4475 FA80 60A7 83FE 14C9 57E8 2BD9
extract and build the release with the good old cxenstored instead of oxenstored
tar xzf xen-$ver.tar.gz cd xen-$ver/ ./configure \ --sysconfdir=/etc \ --localstatedir=/var \ --with-xenstored=xenstored \ --disable-sdl \ --disable-xsmpolicy \ --disable-systemd \ --disable-seabios \ --disable-stubdom \ --disable-ioemu-stubdom \ --disable-pv-grub \ --disable-xenstore-stubdom \ --disable-ocamltools \ --disable-qemu-traditional \ --disable-ovmf \ --with-extra-qemuu-configure-args="--sysconfdir=/etc --audio-drv-list= --disable-slirp --disable-blobs --without-default-features"
and since we are using a minimal system
--disable-docs \
more options
# --disable-rombios already disabled by --disable-qemu-traditional # --disable-debug # --disable-pvshim
finally proceed with the build!
echo $MAKEFLAGS
# make clean-xen >/dev/null && echo CLEAN
time make xen > ../xen.log && echo BUILT
# 0m34.370s on bravo
make install-xen > ../install-xen-${HOSTNAME%%.*}.log && echo DEPLOYED
ln -s boot/xen.gz /xen.gz
cd ../
slackpkg install gettext-tools pkg-config glib2 pcre google-go-lang
Fetch ipxe & seabios GIT repos through https://
export PATH=$PATH:/usr/lib64/bcc which bcc-cpp
installing the latest ACPICA for xen tools to build
wget https://acpica.org/sites/acpica/files/acpica-unix2-20210730.tar.gz tar xzf acpica-unix2-20210730.tar.gz cd acpica-unix2-20210730/ echo $MAKEFLAGS make > ../acpica.log && echo BUILT make install > ../make.acpica.install.log && echo INSTALLED cd ../
(configure was done above) #make distclean #time make world > ../world.$HOSTNAME.log && echo WORLD #make clean-tools echo $MAKEFLAGS time make tools > ../tools.log && echo BUILT make install-tools > ../install-tools.log && echo DEPLOYED #make clean-stubdom #time make stubdom > stubdom.log && echo BUILT #time make install-stubdom cp -pi /etc/ld.so.conf /etc/ld.so.conf.dist cat >> /etc/ld.so.conf <<-EOF /usr/local/lib EOF cat /etc/ld.so.conf ldconfig
without autoballoon nor anything specific (default network type is bridge already)
#mv -i /etc/xen/xl.conf /etc/xen/xl.conf.dist #grep -vE '^[[:space:]]*(#|$)' /etc/xen/xl.conf.dist #empty #vi /etc/xen/xl.conf #https://xenbits.xen.org/docs/4.11-testing/man/xl.conf.5.html #https://xenbits.xen.org/docs/unstable/man/xl.conf.5.html #autoballoon="on" #vif.default.bridge="xenbr0" #vif.default.script="vif-bridge" #vif.default.script="vif-openvswitch"
now we want to enable the XEN daemons at boot time alright.
ls -lF /etc/init.d/xen* vi /etc/rc.d/rc.local
we keep using xendomains because otherwise, guests live alone while dom0 shuts down. also, the default scheduler is now Credit2, since 4.10 or 4.12 – load it AFTER
xencommons!
echo XEN /etc/init.d/xencommons start /etc/init.d/xendomains start /usr/local/sbin/xl sched-credit2 --domain=0 --weight=512 /usr/local/sbin/xl sched-credit2 echo
and shutdown
vi /etc/rc.d/rc.local_shutdown #!/bin/sh echo XEN DOWN /etc/init.d/xendomains stop /etc/init.d/xencommons stop echo chmod +x /etc/rc.d/rc.local_shutdown grep rc.local_shutdown /etc/rc.d/rc.*
slackpkg search kernel
No need for those
removepkg kernel-huge removepkg kernel-modules removepkg kernel-source
but it’s good to keep those
slackpkg install kernel-firmware slackpkg install kernel-headers
and you can now proceed with dom0 kernel building
Choose either GRUB2 or SYSLINUX – LILO is not an option here (unless you want to play with mbootpack)
Index of /booting/ https://pub.nethence.com/booting/
see network
cat /sys/hypervisor/properties/capabilities cat /proc/xen/capabilities /etc/init.d/xencommons status xl li
It took me a while to figure out with my slackware/XEN servers were lagging and even refusing to provide a prompt when NFS was failing. It was because I had the bad idea to put /data/xen in the PATH. And that was on the NFS share. Therefore it is better to have a separate copy of the repository on each node (here in /root/).
cd ~/ git clone git@github.com:pbraun9/xen.git git clone https://github.com/pbraun9/xen.git
max_loop=128
Xen dom0 complains about not enough free loop devices when trying to start a new domU or when trying to “mount -o loop” from the cmdline https://wiki.xenproject.org/wiki/Xen_Common_Problems#Xen_dom0_complains_about_not_enough_free_loop_devices_when_trying_to_start_a_new_domU_or_when_trying_to_.22mount_-o_loop.22_from_the_cmdline
How to add more /dev/loop* devices on Fedora 19 https://unix.stackexchange.com/questions/98742/how-to-add-more-dev-loop-devices-on-fedora-19
\3. Adding Support for More Loop Devices https://www.tldp.org/HOWTO/CDServer-HOWTO/addloops.html
slackpkg install libpciaccess sbopkg -i libvirt sbopkg -i libvirt-python sbopkg -i virt-manager sbopkg -i virt-viewer cat /etc/sysctl.d/60-libvirtd.conf sysctl fs.aio-max-nr=1048576 /usr/sbin/libvirtd -d cat >> /etc/rc.local <<-EOF echo -n starting libvirt... /usr/sbin/libvirtd -d && echo done EOF virsh list
mounted by xencommons,
cat >> /etc/fstab <<-EOF xenfs /proc/xen xenfs defaults 0 0 EOF mount /proc/xen/
eventually fix an anoying bug into seabios,
grep -r BXSSDTSUSP * vi tools/firmware/seabios-dir-remote/src/fw/ssdt-misc.dsl BXSSDTSUSP --> BXSSDTSU grep -r BXSSDTPCIHP * vi tools/firmware/seabios-dir-remote/src/fw/ssdt-pcihp.dsl BXSSDTPCIHP --> BXSSDTPC
/data/host/xen-4.12.3/tools/libxl/dsdt_pvh.asl 3339: Processor ( PR7F, 127, 0x0000b010, 0x06 ) {
Warning 3168 - ^ Legacy Processor() keyword detected. Use Device() keyword instead.
/tmp/cc7ADtII.s: Assembler messages:
/tmp/cc7ADtII.s:3: Error: junk at end of line, first unrecognized character is `{'
Makefile:88: Test harness not built, use newer compiler than "gcc"
while building tools
ERROR: Cannot find Ninja
–> pip install ninja
while booting dom0
(XEN) ERROR: Will only load images built for the generic loader or Linux images (Not '' and '') or with PHYS32_ENTRY set
–> dom0 kernel is not XEN-capable
Dom0 Kernels for Xen https://wiki.xenproject.org/wiki/Dom0_Kernels_for_Xen
Compiling Xen https://wiki.xenproject.org/wiki/Compiling_Xen
Compiling Xen From Source https://wiki.xenproject.org/wiki/Compiling_Xen_From_Source
Xen Project Repositories https://wiki.xenproject.org/wiki/Xen_Project_Repositories
Getting Started with Xen on Slackware http://amree.github.io/2012/09/12/getting-started-with-xen-on-slackware/
Xen Documentation https://xenbits.xen.org/docs/unstable/