From: "H. Peter Anvin" <hpa@zytor.com>
To: Dave Jones <davej@redhat.com>, Christian <haveaniceday@cv-sv.de>,
linux-kernel@vger.kernel.org, ak@suse.de
Subject: Re: 2.6.22-rc1 does not boot on VIA C3_2 cause of X86_CMPXCHG64
Date: Wed, 16 May 2007 18:15:56 -0700 [thread overview]
Message-ID: <464BACCC.7070504@zytor.com> (raw)
In-Reply-To: <20070517004209.GE16810@redhat.com>
Dave Jones wrote:
>
> The C3s all have cx8, but it needs to be enabled in an MSR first.
> (See arch/i386/kernel/cpu/centaur.c , search for CX8)
>
> Did we add code that uses cmpxchg8b before identify_cpu() gets run ?
> I've not been paying attention to .22rc (busy trying to beat .21 into shape for F7)
> so I may have missed something obvious. Andi?
>
Andi added code to verify that we can actually execute on the processor
before protected mode (so we can still get a message out through the
BIOS.) That code presumably doesn't know of the MSR that needs to be
touched.
That code is in assembly in Andi's version, my rewritten version has it
in C. I should add this code.
-hpa
next prev parent reply other threads:[~2007-05-17 1:16 UTC|newest]
Thread overview: 44+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-05-17 0:09 2.6.22-rc1 does not boot on VIA C3_2 cause of X86_CMPXCHG64 Christian
2007-05-17 0:42 ` Dave Jones
2007-05-17 1:15 ` H. Peter Anvin [this message]
2007-05-17 1:55 ` H. Peter Anvin
2007-05-17 1:39 ` Christian
2007-05-17 21:28 ` Christian Volkmann
2007-05-17 21:47 ` Dave Jones
2007-05-17 21:59 ` Christian Volkmann
2007-05-31 5:22 ` [RFC: 2.6 patch] i386: remove support for the Rise CPU Adrian Bunk
2007-05-31 13:31 ` Dave Jones
2007-05-31 17:37 ` Christian Volkmann
2007-05-31 17:48 ` Dave Jones
2007-05-19 10:22 ` 2.6.22-rc1 does not boot on VIA C3_2 cause of X86_CMPXCHG64 Hans de Bruin
2007-05-17 8:56 ` Alan Cox
2007-05-17 11:51 ` Andi Kleen
2007-05-17 15:02 ` Dave Jones
2007-05-17 22:14 ` H. Peter Anvin
2007-05-19 5:53 ` 2.6.22-rc1 does not boot on VIA C3_2 cause of X86_CMPXCHG64 II Andi Kleen
2007-05-19 6:02 ` Dave Jones
2007-05-19 11:47 ` Andi Kleen
2007-05-19 17:23 ` Dave Jones
2007-05-19 8:22 ` Claas Langbehn
2007-05-19 18:10 ` H. Peter Anvin
2007-05-19 11:42 ` Christian Volkmann
2007-05-19 11:54 ` Andi Kleen
2007-05-23 21:50 ` H. Peter Anvin
2007-05-19 17:26 ` Claas Langbehn
2007-05-19 20:22 ` Via C3: other flags possible ? Christian Volkmann
2007-05-19 22:36 ` Christian Volkmann
2007-05-19 22:52 ` Via C3/C7: " Simon Arlott
2007-05-20 8:19 ` Claas Langbehn
2007-05-20 13:14 ` Christian Volkmann
2007-05-20 12:59 ` Via C3: " Andi Kleen
2007-05-19 17:54 ` 2.6.22-rc1 does not boot on VIA C3_2 cause of X86_CMPXCHG64 II Claas Langbehn
2007-05-17 1:10 ` 2.6.22-rc1 does not boot on VIA C3_2 cause of X86_CMPXCHG64 Linus Torvalds
2007-05-17 1:25 ` Christian
2007-05-17 2:21 ` Linus Torvalds
2007-05-17 3:05 ` H. Peter Anvin
2007-05-17 3:16 ` Linus Torvalds
2007-05-17 4:51 ` H. Peter Anvin
2007-05-17 6:18 ` Dave Jones
2007-05-17 6:31 ` H. Peter Anvin
2007-05-17 6:17 ` Dave Jones
2007-05-17 9:22 ` Hans de Bruin
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