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xen-devel
RE: [Xen-devel] [PATCH 3/3 v2] XSAVE/XRSTOR: enable guest AVX
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To: |
Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>, "Han, Weidong" <weidong.han@xxxxxxxxx> |
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Subject: |
RE: [Xen-devel] [PATCH 3/3 v2] XSAVE/XRSTOR: enable guest AVX |
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From: |
"Li, Xin" <xin.li@xxxxxxxxx> |
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Date: |
Wed, 1 Sep 2010 22:22:43 +0800 |
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zh-CN, en-US |
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Cc: |
Xen-devel <xen-devel@xxxxxxxxxxxxxxxxxxx>, Keir Fraser <keir.fraser@xxxxxxxxxxxxx>, Jan Beulich <JBeulich@xxxxxxxxxx> |
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Wed, 01 Sep 2010 07:23:30 -0700 |
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ActJ3lQKR34dVG2CTKa9ORGPWXDg5gAAHLEw |
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Thread-topic: |
[Xen-devel] [PATCH 3/3 v2] XSAVE/XRSTOR: enable guest AVX |
> 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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