linux-kernel - Re: 2.6.22-rc1 does not boot on VIA C3_2 cause of X86

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <alpine.LFD.0.98.0705162012340.3890@woody.linux-foundation.org>
Date:	Wed, 16 May 2007 20:16:11 -0700 (PDT)
From:	Linus Torvalds <torvalds@...ux-foundation.org>
To:	"H. Peter Anvin" <hpa@...or.com>
cc:	Christian <haveaniceday@...sv.de>, linux-kernel@...r.kernel.org
Subject: Re: 2.6.22-rc1 does not boot on VIA C3_2 cause of X86_CMPXCHG64

On Wed, 16 May 2007, H. Peter Anvin wrote:
> 
> It gets turned on by the code in arch/i386/kernel/cpu.  It's just that
> the new code that Andi added runs during setup, i.e. in real mode, so
> *way* earlier than that.

Ahh. Do we really need it that early?

Now, it's easy enough to just turn off CONFIG_X86_CMPXCHG64 (it really 
should be "8B" instead of "64", but that's another issue) for those 
things, and nobody should really care, but still, maybe we could re-do the 
early bits to be more polite to those VIA CPU's?

I thought the cmpxchg8b stuff was just used to page table setup. Do those 
things even _support_ PAE?

What else uses it? Early setup in real mode? What am I missing? My grep 
powers are waning..

		Linus
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/