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Xen i386 support on Debian wheezy-LTS

According to Bastian Blank the the fix for XSA 173 breaks i386
support. The HVM domains die immediately due to a triple fault.  His
working theory is that invalid bits slip into the initial page table of
the domain. He is recommending that we drop support for i386 in order
that we can continue patching Xen in wheezy with the latest security

> Every change makes it worse.  Also there is no room for additional flags
> on x86-32.
> So right now it's either:
> - drop the fix,
> - make 32-bit hvm unsupported or
> - drop 32-bit hypervisor altogether.

I have CCed the people involved in
https://bugs.launchpad.net/ubuntu/+source/xen/+bug/1581420; just
wondering if you noticed the same problem, and if so what you did to
resolve it?
Brian May <brian@linuxpenguins.xyz>

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