* gnu/services/virtualization.scm (sanitize-hurd-vm-configuration-type): New procedure.
(hurd-vm-confiuration): Add type field.
(hurd-vm-disk-image): Use it.
* doc/guix.texi (hurd-vm-configuration): Document it.
* gnu/tests/virtualization.scm (%childhurd64-os): New variable.
(run-childhurd-test): Add the os a parameter.
(%test-childhurd): Adjust accordingly.
(%test-childhurd64): New system test.
Change-Id: Ie1c55a9414657ced4bf8b4324527037f1a1f78f4
Signed-off-by: Ludovic Courtès <ludo@gnu.org>
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