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Re: [Xen-devel] [PATCH] Add xsave/xrstor support to Xen

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Subject: Re: [Xen-devel] [PATCH] Add xsave/xrstor support to Xen
From: yuhong <yuhongbao_386@xxxxxxxxxxx>
Date: Fri, 3 Apr 2009 17:22:59 -0700 (PDT)
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Keir Fraser-3 wrote:
> I must say I am happy to wait until there are some actual extended state
> vectors to be saved. It's not clear that the XSAVE format is the right way
> to extend the HVM save/restore format. The right direction may depend on
> what types of new state are introduced, whether these are achitectural or
> vendor-specific, etc. It doesn't sound like there's a downside to sitting
> on
> the fence and doing nothing for now.
Fortunately, the additional state that will be saved by future processors
is already documented in the Intel AVX programming reference.
Basically, AVX is extending the XMM registers to 256-bit.
These extended registers are called the YMM registers.
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