linux-kernel - Re: FP in kernelspace

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Message-ID: <44CCFAD3.2050607@argo.co.il>
Date:	Sun, 30 Jul 2006 21:30:43 +0300
From:	Avi Kivity <avi@...o.co.il>
To:	Andi Kleen <ak@...e.de>
CC:	Jiri Slaby <jirislaby@...il.com>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: FP in kernelspace

Andi Kleen wrote:
>
> >
> > Cannot work on x86-64, even disregarding fp exceptions, because
> > kernel_fpu_begin() doesn't save the sse state which is used by fp math.
> >
> > No?
>
> It does - FXSAVE saves everything.
>

I see.  Thanks for clearing it up.

-- 
Do not meddle in the internals of kernels, for they are subtle and quick to panic.

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