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List:       qubes-devel
Subject:    [qubes-devel] Re: Xen 4.10/4.11 for Qubes 4.1
From:       Simon Gaiser <simon () invisiblethingslab ! com>
Date:       2018-05-16 9:34:00
Message-ID: 22dca8e5-4ab5-6393-ebe6-ae21fac2f763 () invisiblethingslab ! com
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Marek Marczykowski-Górecki:
> Hi Simon,
> 
> I'd like to start merging things for Qubes 4.1, but for that, I need
> a new branch in vmm-xen repo. I consider using 4.11 for that - it is
> still in rc phase, but until we'll be anywhere near R4.1, Xen 4.11 will
> be out.
> 
> Do you know anything I should be careful about while updating 4.8->4.11?
> Some Xen changes I should be aware of?

At the moment I can't think of something specific (But I'm not sure if
I'm forgetting something obvious).

That being said there has been a lot of changes. For when example
backporting the suspend fix from staging I first run into a compile
error [1] because of changes to the alternatives macros (easy to spot
and fix) and then into a OOB read [2] since details of the cpuinfo_x86
struct handling changed (not that easy to find). So you probably will
run into some problems due to changes.

OTOH, looking at our patches we can drop a lot of them since they are
already included in 4.11: backports section, pvh backports, security
fixes, gcc fixes, python3 fixes.

Simon

[1]: https://lists.xenproject.org/archives/html/xen-devel/2018-04/msg01095.html
[2]: https://lists.xenproject.org/archives/html/xen-devel/2018-04/msg01100.html
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