From: Doug Ledford <dledford@redhat.com>
To: Andi Kleen <ak@suse.de>
Cc: "H. Peter Anvin" <hpa@zytor.com>, linux-kernel@vger.kernel.org
Subject: Re: SSE related security hole
Date: Fri, 19 Apr 2002 14:00:31 -0400 [thread overview]
Message-ID: <20020419140031.A25519@redhat.com> (raw)
In-Reply-To: <20020418183639.20946.qmail@science.horizon.com.suse.lists.linux.kernel> <a9ncgs$2s2$1@cesium.transmeta.com.suse.lists.linux.kernel> <p73662naili.fsf@oldwotan.suse.de>
On Fri, Apr 19, 2002 at 04:06:17PM +0200, Andi Kleen wrote:
> "H. Peter Anvin" <hpa@zytor.com> writes:
> >
> > Perhaps the right thing to do is to have a description in data of the
> > desired initialization state and just F[NX]RSTOR it?
>
> Sounds like the cleanest solution. The state could be saved at CPU bootup
> with just MXCSR initialized.
>
> I'll implement that for x86-64.
Ummm...last I knew, fxrstor is *expensive*. The fninit/xor regs setup is
likely *very* much faster. Someone should check this before we sacrifice
100 cycles needlessly or something.
--
Doug Ledford <dledford@redhat.com> 919-754-3700 x44233
Red Hat, Inc.
1801 Varsity Dr.
Raleigh, NC 27606
next prev parent reply other threads:[~2002-04-19 18:00 UTC|newest]
Thread overview: 61+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20020418183639.20946.qmail@science.horizon.com.suse.lists.linux.kernel>
[not found] ` <a9ncgs$2s2$1@cesium.transmeta.com.suse.lists.linux.kernel>
2002-04-19 14:06 ` SSE related security hole Andi Kleen
2002-04-19 18:00 ` Doug Ledford [this message]
2002-04-19 21:04 ` Andrea Arcangeli
2002-04-19 21:35 ` H. Peter Anvin
2002-04-19 21:42 ` Andi Kleen
2002-04-20 3:23 ` Andrea Arcangeli
2002-04-19 23:12 ` [PATCH] " Brian Gerst
2002-04-19 23:41 ` Linus Torvalds
2002-04-20 0:01 ` H. Peter Anvin
2002-04-20 0:09 ` Linus Torvalds
2002-04-20 0:11 ` Brian Gerst
2002-04-20 0:19 ` H. Peter Anvin
2002-04-20 0:29 ` Linus Torvalds
2002-04-20 0:31 ` Alan Cox
2002-04-20 0:08 ` Brian Gerst
2002-04-20 0:21 ` Linus Torvalds
2002-04-20 4:21 ` Andrea Arcangeli
2002-04-20 4:35 ` Linus Torvalds
2002-04-20 5:07 ` Andrea Arcangeli
2002-04-20 16:27 ` Linus Torvalds
2002-04-20 17:27 ` Andrea Arcangeli
2002-04-20 17:38 ` Linus Torvalds
2002-04-20 18:12 ` Andrea Arcangeli
2002-04-20 19:30 ` Linus Torvalds
2002-04-20 19:41 ` Andi Kleen
2002-04-20 21:28 ` Andrea Arcangeli
2002-04-20 22:43 ` H. Peter Anvin
2002-04-21 2:09 ` Andrea Arcangeli
2002-04-20 23:23 ` Linus Torvalds
2002-04-21 2:08 ` Andrea Arcangeli
2002-04-20 23:13 ` Linus Torvalds
2002-04-23 19:21 ` Linus Torvalds
2002-04-23 20:05 ` H. Peter Anvin
2002-04-24 0:32 ` Andrea Arcangeli
2002-04-24 2:10 ` Linus Torvalds
2002-04-26 9:13 ` Pavel Machek
2002-04-26 11:55 ` Andrea Arcangeli
2002-04-19 22:18 ` Jan Hubicka
2002-04-22 22:24 Saxena, Sunil
[not found] <200204182320.53095.nahshon@actcom.co.il>
2002-04-19 11:22 ` Alan Cox
-- strict thread matches above, loose matches on Subject: below --
2002-04-18 18:36 linux
2002-04-18 18:53 ` Richard B. Johnson
2002-04-21 19:52 ` Pavel Machek
2002-04-21 22:11 ` David Wagner
2002-04-18 21:06 ` H. Peter Anvin
2002-04-17 23:42 Doug Ledford
2002-04-18 5:26 ` Andrea Arcangeli
2002-04-18 9:10 ` Arjan van de Ven
2002-04-18 11:18 ` Alan Cox
2002-04-18 11:14 ` Andi Kleen
2002-04-18 11:53 ` Alan Cox
2002-04-18 11:46 ` Andi Kleen
2002-04-18 11:55 ` Andi Kleen
2002-04-18 13:44 ` Doug Ledford
2002-04-18 19:20 ` Pavel Machek
2002-04-18 19:32 ` Doug Ledford
2002-04-21 19:54 ` Pavel Machek
2002-04-18 8:22 ` Andi Kleen
2002-04-17 14:51 Jan Hubicka
2002-04-17 15:23 ` Jan Hubicka
2002-04-18 14:57 ` Denis Vlasenko
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