genode/tool/run/power_on/xen
Christian Prochaska ee352abc56 run: add Xen support
When building Genode on a Linux system running in a Xen Dom0, the 'xen'
run target can run a Genode scenario in a Xen DomU.

Usage: in build/x86_*/etc/build.conf, define:

RUN_OPT = --include boot_dir/$(KERNEL) --include image/iso --include power_on/xen --include log/xen --include power_off/xen

The Xen DomU runs in HVM mode and loads Genode from an ISO image. Serial
log output is printed to the console and graphical output is shown in an
SDL window.

The Xen DomU ist managed using the 'xl' command line tool and it is
possible to add configuration options in the 'xen_args' variable in a run
script. Common options are:

- disabling the graphical output:

  append xen_args { sdl="0" }

- configuring a network device:

  append xen_args { vif=\["model=e1000,mac=02:00:00:00:01:01,bridge=xenbr0"\] }

- configuring USB input devices:

  append xen_args { usbdevice=\["mouse","keyboard"\] }

Note: the 'xl' tool requires super-user permissions and interactive
password input can be troublesome in combination with 'expect' and is not
practical for automatic tests. For this reason, the current implementation
assumes that no password input is needed when running 'sudo xl', which can
be achieved by creating a file '/etc/sudoers.d/xl' with the content
'user ALL=(root) NOPASSWD: /usr/sbin/xl'
(where 'user' is the Linux user name).

Fixes #2504
2017-08-28 16:49:48 +02:00

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##
# Reset the target machine or rather run the scenario as Xen DomU
#
source [genode_dir]/tool/run/xen.inc
##
# Execute scenario using xl
#
proc run_power_on { } {
global xen_args
global xen_spawn_id
#
# Back out on platforms w/o Xen support
#
if {![is_xen_available]} { return 0 }
set xen_base_args { \
builder="hvm"\; \
name="genode-hvm"\; \
cpus="1"\; \
memory="512"\; \
serial="pty"\; \
sdl="1"\; \
vnc="0"\; \
disk=\["file:[run_dir].iso,hdc:cdrom,r"\]\; \
boot="d"\; \
}
eval spawn sudo xl create -c /dev/null $xen_base_args $xen_args
set xen_spawn_id $spawn_id
return true
}