Re: [PATCH] Mutilated form of Andi Kleen's AMD prefetch errata patch
From: H. Peter Anvin (hpa_at_zytor.com)
Date: 09/30/03
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- In reply to: Andi Kleen: "Re: [PATCH] Mutilated form of Andi Kleen's AMD prefetch errata patch"
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To: linux-kernel@vger.kernel.org Date: 30 Sep 2003 13:08:21 -0700
Followup to: <p73pthiyu0e.fsf@oldwotan.suse.de>
By author: Andi Kleen <ak@suse.de>
In newsgroup: linux.dev.kernel
>
> I implemented it for long mode on x86-64.
>
> It has to be done before the vesafb is initialized too, otherwise
> you cannot see the error message.
>
> You could copy the code from arch/x86_64/boot/setup.S
> (starting with /* check for long mode. */) and change it to
> check for the CPUID bits you want. x86-64 checks a basic collection
> that has been determined to be the base set of x86-64 supporting CPUs.
> But it could be less or more.
>
Do it in boot/setup.S so that you can still issue a message via the
BIOS. However, don't forget you might need bug fixes/workarounds like
the P6 SEP in there, too. From that perspective it would be nice to
have something that can be written in C. Recent binutils actually
allow gcc-generated .s-files to be assembled for a 16-bit environment
(with lots of overrides.)
-hpa
-- <hpa@transmeta.com> at work, <hpa@zytor.com> in private! If you send me mail in HTML format I will assume it's spam. "Unix gives you enough rope to shoot yourself in the foot." Architectures needed: ia64 m68k mips64 ppc ppc64 s390 s390x sh v850 x86-64 - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
- Previous message: Knezevic Nikola: "Re: PROBLEM: <oops when unplugging USB Flash disk, somewhere in SCSI subsystem>"
- In reply to: Andi Kleen: "Re: [PATCH] Mutilated form of Andi Kleen's AMD prefetch errata patch"
- Messages sorted by: [ date ] [ thread ] [ subject ] [ author ]
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