linux-kernel - Re: [PATCH] x86: add optimisation option for k10 processors

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Message-ID: <20101220075454.GB25977@aftab>
Date:	Mon, 20 Dec 2010 08:54:54 +0100
From:	Borislav Petkov <borislav.petkov@....com>
To:	Benjamin <masterme120@...il.com>
CC:	<linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] x86: add optimisation option for k10 processors

On Sun, Dec 19, 2010 at 04:45:32PM -0500, Benjamin wrote:
> From: Benjamin Fair <masterme120@...il.com>
> 
> This adds a config option to optimise for AMD family-k10 processors.

They're called AMD F10h processors, no more K*.

> Signed-off-by: Benjamin Fair <masterme120@...il.com>
> 
> diff -uNr linux-2.6.37-rc6.vanilla/arch/x86/Kconfig.cpu
> linux-2.6.37-rc6/arch/x86/Kconfig.cpu
> --- linux-2.6.37-rc6.vanilla/arch/x86/Kconfig.cpu	2010-12-15
> 20:24:48.000000000 -0500
> +++ linux-2.6.37-rc6/arch/x86/Kconfig.cpu	2010-12-19 14:31:59.034429012
> -0500
> @@ -171,6 +171,13 @@
>  	  Enables use of some extended instructions, and passes appropriate
>  	  optimization flags to GCC.
>  
> +config MK10

config MF10H

> +	bool "Phenom/Phenom-II/Athlon-II/K10/10h"

	bool "Phenom/Phenom-II/Athlon-II, i.e. all F10h CPUs"

> +	---help---
> +	  Select this for an AMD K10-family processor.  Also known as Family
> +	  10h.  Enables use of some extended instructions, and passes
> +	  appropriate  optimization flags to GCC.
> +

ditto, no more K's.

[.. ]

> diff -uNr linux-2.6.37-rc6.vanilla/arch/x86/Makefile
> linux-2.6.37-rc6/arch/x86/Makefile
> --- linux-2.6.37-rc6.vanilla/arch/x86/Makefile	2010-12-15
> 20:24:48.000000000 -0500
> +++ linux-2.6.37-rc6/arch/x86/Makefile	2010-12-19 15:42:01.041429011
> -0500
> @@ -51,6 +51,7 @@
>  
>          # FIXME - should be integrated in Makefile.cpu
> (Makefile_32.cpu)
>          cflags-$(CONFIG_MK8) += $(call cc-option,-march=k8)
> +        cflags-$(CONFIG_MK10) += $(call cc-option,-march=amdfam10)

But before we do that, let me talk to the compiler guys first.

Thanks.

-- 
Regards/Gruss,
Boris.

Advanced Micro Devices GmbH
Einsteinring 24, 85609 Dornach
General Managers: Alberto Bozzo, Andrew Bowd
Registration: Dornach, Gemeinde Aschheim, Landkreis Muenchen
Registergericht Muenchen, HRB Nr. 43632

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