linux-kernel - Re: [patch] x86: add linux kernel support for YMM state

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Message-ID: <20090412111314.GF25392@elte.hu>
Date:	Sun, 12 Apr 2009 13:13:14 +0200
From:	Ingo Molnar <mingo@...e.hu>
To:	Suresh Siddha <suresh.b.siddha@...el.com>
Cc:	hpa@...ux.intel.com, tglx@...utronix.de,
	linux-kernel@...r.kernel.org
Subject: Re: [patch] x86: add linux kernel support for YMM state


* Suresh Siddha <suresh.b.siddha@...el.com> wrote:

> From: Suresh Siddha <suresh.b.siddha@...el.com>
> Subject: x86: add linux kernel support for YMM state
> 
> Intel Advanced Vector Extensions (AVX) introduce 256-bit vector 
> processing capability. More about AVX at 
> http://software.intel.com/sites/avx
> 
> Add OS support for YMM state management using xsave/xrstor 
> infrastructure to support AVX.
> 
> Signed-off-by: Suresh Siddha <suresh.b.siddha@...el.com>

This looks very straightforward - if a CPU announces this capability 
we save/restore that state via xsave/xrstor.

So i've applied it to x86/urgent - looks uncontroversial enough to 
still go into 2.6.30. Have you tested it on real silicon too?

	Ingo

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