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Subject[PATCH 00 of 55] xen64: implement 64-bit Xen support
Hi Ingo,

Here's the set of patches to implement 64-bit Xen support.

The first part of the series is some more (fairly minor) x86 arch
updates which here missed in the previous series.

Following that are the Xen-specific changes to implement 64-bit
support. It works fairly well, but I know of a couple of bugs:

- 32-bit emulation doesn't work properly yet. Something goes wrong
with %gs, and a userspace %gs: reference segfaults.

- It crashes when bringing up secondary CPUs under some combinations
of config. I think it isn't quite setting up all the CPU sibling
topology stuff for the various scheduler policies. It's trying to
set up the most simple of arrangements (every CPU is a singleton
with no shared cache or anything else). It was quite tricky to
arrange this...

I hope to have followup patches to address both of these in the next
couple of days. I expect both fixes will be small.


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