From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932975AbZHUVsH (ORCPT ); Fri, 21 Aug 2009 17:48:07 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S932243AbZHUVsE (ORCPT ); Fri, 21 Aug 2009 17:48:04 -0400 Received: from jessica.hrz.tu-chemnitz.de ([134.109.132.47]:35861 "EHLO jessica.hrz.tu-chemnitz.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S933002AbZHUVr7 (ORCPT ); Fri, 21 Aug 2009 17:47:59 -0400 X-Greylist: delayed 2460 seconds by postgrey-1.27 at vger.kernel.org; Fri, 21 Aug 2009 17:47:59 EDT From: Tobias Doerffel To: linux-kernel@vger.kernel.org, hpa@zytor.com Cc: Tobias Doerffel Subject: [PATCH] x86: add specific support for Intel Atom architecture Date: Fri, 21 Aug 2009 23:06:23 +0200 Message-Id: <1250888783-9897-1-git-send-email-tobias.doerffel@gmail.com> X-Mailer: git-send-email 1.6.3.3 In-Reply-To: <4A8F0539.2000207@zytor.com> References: <4A8F0539.2000207@zytor.com> X-Spam-Score: -1.4 (-) X-Spam-Report: --- Start der SpamAssassin 3.2.5 Textanalyse (-1.4 Punkte) Fragen an/questions to: Postmaster TU Chemnitz -1.4 ALL_TRUSTED Nachricht wurde nur ueber vertrauenswuerdige Rechner weitergeleitet --- Ende der SpamAssassin Textanalyse X-Scan-Signature: 6bd8260dc2e41ed16fce2659cff4e067 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Add another option when selecting CPU family so the kernel can be optimized for Intel Atom CPUs. If GCC supports tuning options for Intel Atom they will be used. Signed-off-by: Tobias Doerffel --- arch/x86/Kconfig.cpu | 17 +++++++++++++---- arch/x86/Makefile | 2 ++ arch/x86/Makefile_32.cpu | 2 ++ arch/x86/include/asm/module.h | 2 ++ 4 files changed, 19 insertions(+), 4 deletions(-) diff --git a/arch/x86/Kconfig.cpu b/arch/x86/Kconfig.cpu index 8130334..8dba407 100644 --- a/arch/x86/Kconfig.cpu +++ b/arch/x86/Kconfig.cpu @@ -262,6 +262,15 @@ config MCORE2 family in /proc/cpuinfo. Newer ones have 6 and older ones 15 (not a typo) +config MATOM + bool "Intel Atom" + ---help--- + + Select this for the Intel Atom platform. Intel Atom CPUs have an + in-order pipelining architecture and thus can benefit from + accordingly optimized code. Use a recent GCC with specific Atom + support in order to fully benefit from selecting this option. + config GENERIC_CPU bool "Generic-x86-64" depends on X86_64 @@ -310,7 +319,7 @@ config X86_L1_CACHE_SHIFT default "7" if MPENTIUM4 || MPSC default "4" if X86_ELAN || M486 || M386 || MGEODEGX1 default "5" if MWINCHIP3D || MWINCHIPC6 || MCRUSOE || MEFFICEON || MCYRIXIII || MK6 || MPENTIUMIII || MPENTIUMII || M686 || M586MMX || M586TSC || M586 || MVIAC3_2 || MGEODE_LX - default "6" if MK7 || MK8 || MPENTIUMM || MCORE2 || MVIAC7 || X86_GENERIC || GENERIC_CPU + default "6" if MK7 || MK8 || MPENTIUMM || MCORE2 || MATOM || MVIAC7 || X86_GENERIC || GENERIC_CPU config X86_XADD def_bool y @@ -359,7 +368,7 @@ config X86_INTEL_USERCOPY config X86_USE_PPRO_CHECKSUM def_bool y - depends on MWINCHIP3D || MWINCHIPC6 || MCYRIXIII || MK7 || MK6 || MPENTIUM4 || MPENTIUMM || MPENTIUMIII || MPENTIUMII || M686 || MK8 || MVIAC3_2 || MEFFICEON || MGEODE_LX || MCORE2 + depends on MWINCHIP3D || MWINCHIPC6 || MCYRIXIII || MK7 || MK6 || MPENTIUM4 || MPENTIUMM || MPENTIUMIII || MPENTIUMII || M686 || MK8 || MVIAC3_2 || MEFFICEON || MGEODE_LX || MCORE2 || MATOM config X86_USE_3DNOW def_bool y @@ -387,7 +396,7 @@ config X86_P6_NOP config X86_TSC def_bool y - depends on ((MWINCHIP3D || MCRUSOE || MEFFICEON || MCYRIXIII || MK7 || MK6 || MPENTIUM4 || MPENTIUMM || MPENTIUMIII || MPENTIUMII || M686 || M586MMX || M586TSC || MK8 || MVIAC3_2 || MVIAC7 || MGEODEGX1 || MGEODE_LX || MCORE2) && !X86_NUMAQ) || X86_64 + depends on ((MWINCHIP3D || MCRUSOE || MEFFICEON || MCYRIXIII || MK7 || MK6 || MPENTIUM4 || MPENTIUMM || MPENTIUMIII || MPENTIUMII || M686 || M586MMX || M586TSC || MK8 || MVIAC3_2 || MVIAC7 || MGEODEGX1 || MGEODE_LX || MCORE2 || MATOM) && !X86_NUMAQ) || X86_64 config X86_CMPXCHG64 def_bool y @@ -397,7 +406,7 @@ config X86_CMPXCHG64 # generates cmov. config X86_CMOV def_bool y - depends on (MK8 || MK7 || MCORE2 || MPENTIUM4 || MPENTIUMM || MPENTIUMIII || MPENTIUMII || M686 || MVIAC3_2 || MVIAC7 || MCRUSOE || MEFFICEON || X86_64) + depends on (MK8 || MK7 || MCORE2 || MPENTIUM4 || MPENTIUMM || MPENTIUMIII || MPENTIUMII || M686 || MVIAC3_2 || MVIAC7 || MCRUSOE || MEFFICEON || X86_64 || MATOM) config X86_MINIMUM_CPU_FAMILY int diff --git a/arch/x86/Makefile b/arch/x86/Makefile index 1b68659..8a4c24c 100644 --- a/arch/x86/Makefile +++ b/arch/x86/Makefile @@ -55,6 +55,8 @@ else cflags-$(CONFIG_MCORE2) += \ $(call cc-option,-march=core2,$(call cc-option,-mtune=generic)) + cflags-$(CONFIG_MATOM) += $(call cc-option,-march=atom) \ + $(call cc-option,-mtune=atom,$(call cc-option,-mtune=generic)) cflags-$(CONFIG_GENERIC_CPU) += $(call cc-option,-mtune=generic) KBUILD_CFLAGS += $(cflags-y) diff --git a/arch/x86/Makefile_32.cpu b/arch/x86/Makefile_32.cpu index 80177ec..30e9a26 100644 --- a/arch/x86/Makefile_32.cpu +++ b/arch/x86/Makefile_32.cpu @@ -33,6 +33,8 @@ cflags-$(CONFIG_MCYRIXIII) += $(call cc-option,-march=c3,-march=i486) $(align)-f cflags-$(CONFIG_MVIAC3_2) += $(call cc-option,-march=c3-2,-march=i686) cflags-$(CONFIG_MVIAC7) += -march=i686 cflags-$(CONFIG_MCORE2) += -march=i686 $(call tune,core2) +cflags-$(CONFIG_MATOM) += $(call cc-option,-march=atom,$(call cc-option,-march=core2,-march=i686)) \ + $(call cc-option,-mtune=atom,$(call cc-option,-mtune=generic)) # AMD Elan support cflags-$(CONFIG_X86_ELAN) += -march=i486 diff --git a/arch/x86/include/asm/module.h b/arch/x86/include/asm/module.h index 47d6274..e959c4a 100644 --- a/arch/x86/include/asm/module.h +++ b/arch/x86/include/asm/module.h @@ -28,6 +28,8 @@ struct mod_arch_specific {}; #define MODULE_PROC_FAMILY "586MMX " #elif defined CONFIG_MCORE2 #define MODULE_PROC_FAMILY "CORE2 " +#elif defined CONFIG_MATOM +#define MODULE_PROC_FAMILY "ATOM " #elif defined CONFIG_M686 #define MODULE_PROC_FAMILY "686 " #elif defined CONFIG_MPENTIUMII -- 1.6.3.3