Re: [Xen-devel] [PATCH] FP fix for x86-64 xenlinux

[Keir Fraser <Keir.Fraser@xxxxxxxxxxxx>]

On 6 Jun 2005, at 08:02, Nakajima, Jun wrote:

> > With this patch, # of testcase failures with LTP is < 5 (out of 800),
> > almost same results as the native x86-64 Linux. The other two patches
> > for LTP are coming soon; with these, all the testcases will pass
> > (except the ones that fail on the native x86-64 Linux).
Consider defining read/write_cr0 macros same as we do in arch/xen/i386. 
We set them the same as native (i.e., real accesses to %cr0) and then 
emulate in Xen. This will ensure that things like raid6 will work, 
which save/restore %cr0 as part of their fpu save/restore code.
 -- Keir


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