Docs: init section QEMU Guest in chapter Profiles

nixos/doc/manual/configuration/profiles.xml

@@ -35,4 +35,5 @@
  <xi:include href="profiles/headless.xml" />
  <xi:include href="profiles/installation-device.xml" />
  <xi:include href="profiles/minimal.xml" />
+ <xi:include href="profiles/qemu-guest.xml" />
 </chapter>

nixos/doc/manual/configuration/profiles/qemu-guest.xml

@@ -0,0 +1,16 @@
+<section xmlns="http://docbook.org/ns/docbook"
+         xmlns:xlink="http://www.w3.org/1999/xlink"
+         xmlns:xi="http://www.w3.org/2001/XInclude"
+         version="5.0"
+         xml:id="sec-profile-qemu-guest">
+ <title>QEMU Guest</title>
+ <para>
+  This profile contains common configuration for virtual machines running under
+  QEMU (using virtio).
+ </para>
+ <para>
+  It makes virtio modules available on the initrd, sets the system time from
+  the hardware clock to work around a bug in qemu-kvm, and
+  <link linkend="opt-security.rngd.enable">enables rngd</link>.
+ </para>
+</section>