Bug#995397: Dropped support for 32-bit Xen PV guests should be mentioned in i386 release notes

[Richard Lewis <richard.lewis.debian@googlemail.com>]

On Thu, 14 Oct 2021 15:48:07 +0200 Paul Gevers <elbrus@debian.org> wrote:
> On 30-09-2021 22:59, Andy Smith wrote:
> > Thanks. I am not sure whether it fits in "Items not limited to the
> > upgrade process" or under "Obsolescence and deprecation", but how
> > about:
>
> I think the second one makes more sense.
>
>
> > Anyway, all of this is only for the i386 release notes as amd64
> > support has not been dropped.
>
> Ack.

But the user could be reading the release notes form perspective of
the host, which could be running any arch, so i think safer to include
in every arch's release-notes

<section id="32bit-xen-pv-guest-not-supported">
 <title>32-bit Xen PV guests are not supported</section>
 <para>
   The Linux kernel (from version 5.9) not longer support 32-bit
<systemitem role="package">xen</systemitem>
   virtual machines using <ulink
url="https://wiki.xenproject.org/wiki/Virtualization_Spectrum";>PV
mode</ulink>.
   Such virtual machines need to be converted to the 64-bit amd64
architecture (see
   <xref linkwns="reference the bit about i386 support"/>).
 </para>
<para>
 You can check which mode a Xen guest is running (inside the virtual machine):
  <commandlisting>
$ cat /sys/hypervisor/guest_type
PV
  </commandlisting>
  Virtual machines that return, for example, <literal>PVH</literal> or
<literal>HVM</literal> are not affected. <!-- other options also
possible -->
</para>
</section>