RE: [Xen-devel] [PATCH 3/3 v2] XSAVE/XRSTOR: enable guest AVX

["Li, Xin" <xin.li@xxxxxxxxx>]

> On Tue, Aug 31, 2010 at 10:52:38PM +0800, Han, Weidong wrote:
> > This patch enables Intel(R) Advanced Vector Extension (AVX) for guest.
> 
> I thought that this would also work on the AMD Bulldozer's CPUs? Or is the
> Intel AVX incompatible with AMD AVX?

The code just checks if a feature is available thru CPUID before using, no 
matter it's Intel CPU or AMD.

There are 2 approaches to provide a new feature, use a compatible way the other 
side is using thus reuse the code/binary, or a complete new way.  There are 
many examples you can find in Linux/Xen code.

AMD people can comment if they will implement the AVX like feature.  If yes, if 
it's in a software compatible way or totally new.

Thanks!
-Xin

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