linux-kernel - Re: [ 174/262] x86, avx: dont use avx instructions with "noxsave" boot param

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Message-ID: <1349658957.16173.160.camel@deadeye.wl.decadent.org.uk>
Date:	Mon, 08 Oct 2012 02:15:57 +0100
From:	Ben Hutchings <ben@...adent.org.uk>
To:	"H. Peter Anvin" <hpa@...or.com>
Cc:	Suresh Siddha <suresh.b.siddha@...el.com>,
	linux-kernel@...r.kernel.org, stable@...r.kernel.org,
	alan@...rguk.ukuu.org.uk,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Subject: Re: [ 174/262] x86, avx: dont use avx instructions with "noxsave"
 boot param

On Mon, 2012-10-08 at 07:55 +0800, H. Peter Anvin wrote:
> Userland should use a different query mechanism.  On the other hand,
> it will not hurt either.  On pre-xsave kernels AVX is a non-option.
[...]

OK, having looked at what the SDM says I agree that there shouldn't be a
problem for userland.

Ben.

-- 
Ben Hutchings
Who are all these weirdos? - David Bowie, about L-Space IRC channel #afp

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