From 8d02c2110b3fb8e2700b31596a582a2989fd72ba Mon Sep 17 00:00:00 2001 From: Thomas Petazzoni Date: Tue, 5 Aug 2008 11:45:19 +0200 Subject: [PATCH] x86: configuration options to compile out x86 CPU support code This patch adds some configuration options that allow to compile out CPU vendor-specific code in x86 kernels (in arch/x86/kernel/cpu). The new configuration options are only visible when CONFIG_EMBEDDED is selected, as they are mostly interesting for space savings reasons. An example of size saving, on x86 with only Intel CPU support: text data bss dec hex filename 1125479 118760 212992 1457231 163c4f vmlinux.old 1121355 116536 212992 1450883 162383 vmlinux -4124 -2224 0 -6348 -18CC +/- However, I'm not exactly sure that the Kconfig wording is correct with regard to !64BIT / 64BIT. [ mingo@elte.hu: convert macro to inline ] Signed-off-by: Thomas Petazzoni Signed-off-by: Ingo Molnar --- arch/x86/Kconfig.cpu | 70 ++++++++++++++++++++++++++++++++++++ arch/x86/kernel/cpu/Makefile | 19 +++++----- include/asm-x86/bugs.h | 5 +++ 3 files changed, 85 insertions(+), 9 deletions(-) diff --git a/arch/x86/Kconfig.cpu b/arch/x86/Kconfig.cpu index 2c518fbc52ec..6156ac25ff8c 100644 --- a/arch/x86/Kconfig.cpu +++ b/arch/x86/Kconfig.cpu @@ -415,3 +415,73 @@ config X86_MINIMUM_CPU_FAMILY config X86_DEBUGCTLMSR def_bool y depends on !(MK6 || MWINCHIPC6 || MWINCHIP2 || MWINCHIP3D || MCYRIXIII || M586MMX || M586TSC || M586 || M486 || M386) + +menuconfig PROCESSOR_SELECT + default y + bool "Supported processor vendors" if EMBEDDED + help + This lets you choose what x86 vendor support code your kernel + will include. + +config CPU_SUP_INTEL_32 + default y + bool "Support Intel processors" if PROCESSOR_SELECT + depends on !64BIT + help + This enables extended support for Intel processors + +config CPU_SUP_INTEL_64 + default y + bool "Support Intel processors" if PROCESSOR_SELECT + depends on 64BIT + help + This enables extended support for Intel processors + +config CPU_SUP_CYRIX_32 + default y + bool "Support Cyrix processors" if PROCESSOR_SELECT + depends on !64BIT + help + This enables extended support for Cyrix processors + +config CPU_SUP_AMD_32 + default y + bool "Support AMD processors" if PROCESSOR_SELECT + depends on !64BIT + help + This enables extended support for AMD processors + +config CPU_SUP_AMD_64 + default y + bool "Support AMD processors" if PROCESSOR_SELECT + depends on 64BIT + help + This enables extended support for AMD processors + +config CPU_SUP_CENTAUR_32 + default y + bool "Support Centaur processors" if PROCESSOR_SELECT + depends on !64BIT + help + This enables extended support for Centaur processors + +config CPU_SUP_CENTAUR_64 + default y + bool "Support Centaur processors" if PROCESSOR_SELECT + depends on 64BIT + help + This enables extended support for Centaur processors + +config CPU_SUP_TRANSMETA_32 + default y + bool "Support Transmeta processors" if PROCESSOR_SELECT + depends on !64BIT + help + This enables extended support for Transmeta processors + +config CPU_SUP_UMC_32 + default y + bool "Support UMC processors" if PROCESSOR_SELECT + depends on !64BIT + help + This enables extended support for UMC processors diff --git a/arch/x86/kernel/cpu/Makefile b/arch/x86/kernel/cpu/Makefile index 25b4c063fbf6..a0fc6c144384 100644 --- a/arch/x86/kernel/cpu/Makefile +++ b/arch/x86/kernel/cpu/Makefile @@ -7,15 +7,16 @@ obj-y += proc.o feature_names.o obj-$(CONFIG_X86_32) += common.o bugs.o cmpxchg.o obj-$(CONFIG_X86_64) += common_64.o bugs_64.o -obj-$(CONFIG_X86_32) += amd.o -obj-$(CONFIG_X86_64) += amd_64.o -obj-$(CONFIG_X86_32) += cyrix.o -obj-$(CONFIG_X86_32) += centaur.o -obj-$(CONFIG_X86_64) += centaur_64.o -obj-$(CONFIG_X86_32) += transmeta.o -obj-$(CONFIG_X86_32) += intel.o -obj-$(CONFIG_X86_64) += intel_64.o -obj-$(CONFIG_X86_32) += umc.o + +obj-$(CONFIG_CPU_SUP_AMD_32) += amd.o +obj-$(CONFIG_CPU_SUP_AMD_64) += amd_64.o +obj-$(CONFIG_CPU_SUP_CYRIX_32) += cyrix.o +obj-$(CONFIG_CPU_SUP_CENTAUR_32) += centaur.o +obj-$(CONFIG_CPU_SUP_CENTAUR_64) += centaur_64.o +obj-$(CONFIG_CPU_SUP_TRANSMETA_32) += transmeta.o +obj-$(CONFIG_CPU_SUP_INTEL_32) += intel.o +obj-$(CONFIG_CPU_SUP_INTEL_64) += intel_64.o +obj-$(CONFIG_CPU_SUP_UMC_32) += umc.o obj-$(CONFIG_X86_MCE) += mcheck/ obj-$(CONFIG_MTRR) += mtrr/ diff --git a/include/asm-x86/bugs.h b/include/asm-x86/bugs.h index 021cbdd5f258..00e4a0cd6f28 100644 --- a/include/asm-x86/bugs.h +++ b/include/asm-x86/bugs.h @@ -2,6 +2,11 @@ #define _ASM_X86_BUGS_H extern void check_bugs(void); + +#ifdef CONFIG_CPU_SUP_INTEL_32 int ppro_with_ram_bug(void); +#else +static inline int ppro_with_ram_bug(void) { return 0; } +#endif #endif /* _ASM_X86_BUGS_H */