Re: [Xen-devel] [Patch] Fix for x86_64 boot failures due to bad segment setup for protected mode.

["Stephen C. Tweedie" <sct@xxxxxxxxxx>]

Hi,

On Thu, 2006-11-09 at 14:08 +0000, Keir Fraser wrote:

> A smaller patch might have been to implement those VMENTER sanity checks
> inside load_seg(). I'm sure they're quite simple. 

I checked, as that was going to be my first approach.  Turns out that
they are not actually all that simple, with all sorts of different rules
for base, size, access rights, type, flags and so on, dependent on which
segment it is, whether it's 16 or 32-bit, etc.  

They aren't _too_ tricky, but after looking at it some, there are enough
rules there that I was actually more worried about introducing a
regression going down that route than in the patch I ended up with.

Cheers,
 Stephen



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