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Hi,

The "8.4.3pre-shim-comet" branch on xenbits.xen.org/xen.git contains a
backport of PVH to Xen 4.8 (and comet shim as the top 3-4 patches). In
practice this is mostly about libxl changes (type="pvh" instead of
device_model_version="none"), but there are also few fixes for other
code, like ACPI tables builder. Those do fix some existing minor bugs.
For example wrongly advertised i8042 controller, causing ~1s delay on
Linux boot.

It seems like the type="pvh" is what Xen is going to support and
device_model_version="none" is abandoned in new versions. This means
that it may be harder to backport further PVH-related patches, and also
upstream our patches to Xen. There is not much changes on libxl side,
but still.
This also means that our libvirt patch in its current shape will be
rejected, and we'll need to maintain it separately.

Changing this that late in the release cycle may not be a good idea, but
changing it later, or having to maintain duplicated set of patches
and having additional difficulty with backporting other patches may also
be a pain.

Simon, can you take a look at this? What do you think about this? And if
you think it worth changing it now, please create appropriate pull
requests.

- -- 
Best Regards,
Marek Marczykowski-Górecki
Invisible Things Lab
A: Because it messes up the order in which people normally read text.
Q: Why is top-posting such a bad thing?
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