[Xen-devel] Re: [PATCH] Add XSAVE/XRSTOR support to Xen

[Keir Fraser <keir.fraser@xxxxxxxxxxxxx>]

On 26/11/08 09:43, "Cui, Dexuan" <dexuan.cui@xxxxxxxxx> wrote:

> The attached patch adds the support of XSAVE/XRSTOR infrastructure for x86.
> XSAVE/XRSTOR manages the existing and future processor extended states on x86
> architecture.
> 
> XSAVE/XRSTOR related stuff is defined in Intel SDMs (The latest version is
> Nov. 2008):
> http://www.intel.com/products/processor/manuals/
> 
> The patch uses the classical CR0.TS based lazy algorithm.
> For now only FPU/SSE states (The bit 0 and 1 of XCR0) is supported.
> 
> Signed-off-by: Dexuan Cui <dexuan.cui@xxxxxxxxx>

Ah, XSAVE is back. Again, as of right now, it's useful how?

 -- Keir



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