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Message-Id: <11941338813105-git-send-email-sam@ravnborg.org> Date: Sun, 4 Nov 2007 00:51:17 +0100 From: Sam Ravnborg <sam@...nborg.org> To: Thomas Gleixner <tglx@...utronix.de>, Ingo Molnar <mingo@...hat.com>, "H. Peter Anvin" <hpa@...or.com>, LKML <linux-kernel@...r.kernel.org> Cc: Sam Ravnborg <sam@...nborg.org> Subject: [PATCH 07/10] x86: add remaning bits from x86_64 to Kconfig.i386 A few symbols remained in Kconfig.x86_64 where the dependencies were different or the help text was different from the i386 one. Modify all relevant Kconfig.i386 symbols such that they have X86_64 dependencies for x86_64 specific items and update the help text as appropriate. Signed-off-by: Sam Ravnborg <sam@...nborg.org> --- arch/x86/Kconfig.i386 | 51 ++++++++++++++++++++++++++++++++++++++++-------- 1 files changed, 42 insertions(+), 9 deletions(-) diff --git a/arch/x86/Kconfig.i386 b/arch/x86/Kconfig.i386 index 890c258..4984904 100644 --- a/arch/x86/Kconfig.i386 +++ b/arch/x86/Kconfig.i386 @@ -307,9 +307,17 @@ source "arch/x86/Kconfig.cpu" config HPET_TIMER bool prompt "HPET Timer Support" if X86_32 + default y if X86_64 help - This enables the use of the HPET for the kernel's internal timer. + Use the IA-PC HPET (High Precision Event Timer) to manage + time in preference to the PIT and RTC, if a HPET is + present. HPET is the next generation timer replacing legacy 8254s. + The HPET provides a stable time base on SMP + systems, unlike the TSC, but it is more expensive to access, + as it is off-chip. You can find the HPET spec at + <http://www.intel.com/hardwaredesign/hpetspec.htm>. + You can safely choose Y here. However, HPET will only be activated if the platform and the BIOS support this feature. Otherwise the 8254 will be used for timing services. @@ -377,8 +385,8 @@ config NR_CPUS default "8" help This allows you to specify the maximum number of CPUs which this - kernel will support. The maximum supported value is 255 and the - minimum value which makes sense is 2. + kernel will support. Current maximum is 255 CPUs due to + APIC addressing limits. Less depending on the hardware. This is purely to save memory - each supported CPU adds approximately eight kilobytes to the kernel image. @@ -444,8 +452,10 @@ config X86_VISWS_APIC default y config X86_MCE - bool "Machine Check Exception" + bool + prompt "Machine Check Exception" if X86_32 || (X86_64 && EMBEDDED) depends on !X86_VOYAGER + default y if X86_64 ---help--- Machine Check Exception support allows the processor to notify the kernel if it detects a problem (e.g. overheating, component failure). @@ -459,6 +469,9 @@ config X86_MCE problem on some new non-standard machine, you can boot with "nomce" to disable it. MCE support simply ignores non-MCE processors like the 386 and 486, so nearly everyone can say Y here. + This version for x86_64 will require the mcelog utility to decode + some machine check error logs. See + ftp://ftp.x86-64.org/pub/linux/tools/mcelog config X86_MCE_NONFATAL tristate "Check for non-fatal errors on AMD Athlon/Duron / Intel Pentium 4" @@ -577,6 +590,8 @@ config MICROCODE To compile this driver as a module, choose M here: the module will be called microcode. + If you use modprobe or kmod you may also want to add the line + 'alias char-major-10-184 microcode' to your /etc/modules.conf file. config MICROCODE_OLD_INTERFACE bool @@ -722,13 +737,19 @@ config X86_PAE # Common NUMA Features config NUMA bool "Numa Memory Allocation and Scheduler Support (EXPERIMENTAL)" - depends on X86_32 && SMP && HIGHMEM64G && (X86_NUMAQ || (X86_SUMMIT || X86_GENERICARCH) && ACPI) && EXPERIMENTAL + depends on (X86_32 && SMP && HIGHMEM64G && (X86_NUMAQ || (X86_SUMMIT || X86_GENERICARCH) && ACPI) && EXPERIMENTAL) || (X86_64 && SMP) default n if X86_PC default y if (X86_NUMAQ || X86_SUMMIT) help - NUMA support for i386. This is currently highly experimental - and should be only used for kernel development. It might also - cause boot failures. + NUMA (Non Uniform Memory Access) support. + For i386 this is currently highly experimental and should be + only used for kernel development. It might also cause boot failures. + NUMA support for X86_64 is working fine. The kernel + will try to allocate memory used by a CPU on the local memory + controller of the CPU and add some more NUMA awareness to the kernel. + This code is recommended on all multiprocessor Opteron systems. + If the system is EM64T, you should say N unless your system is EM64T + NUMA. comment "NUMA (Summit) requires SMP, 64GB highmem support, ACPI" depends on X86_32 && X86_SUMMIT && (!HIGHMEM64G || !ACPI) @@ -879,6 +900,8 @@ config MTRR You can safely say Y even if your machine doesn't have MTRRs, you'll just add about 9 KB to your kernel. + For x86_64 you should just say Y here, all x86_64 machines + support MTRRs. See <file:Documentation/mtrr.txt> for more information. @@ -977,7 +1000,7 @@ config KEXEC config CRASH_DUMP bool "kernel crash dumps (EXPERIMENTAL)" depends on EXPERIMENTAL - depends on HIGHMEM + depends on X86_64 || HIGHMEM help Generate crash dump after being started by kexec. This should be normally only set in special crash dump kernels @@ -992,6 +1015,7 @@ config CRASH_DUMP config PHYSICAL_START hex "Physical address where the kernel is loaded" if (EMBEDDED || CRASH_DUMP) default "0x1000000" if X86_NUMAQ + default "0x200000" if X86_64 default "0x100000" help This gives the physical address where the kernel is loaded. @@ -1044,6 +1068,10 @@ config RELOCATABLE must live at a different physical address than the primary kernel. + Note: If CONFIG_RELOCATABLE=y, then the kernel runs from the address + it has been loaded at and the compile time physical address + (CONFIG_PHYSICAL_START) is ignored. + config PHYSICAL_ALIGN hex prompt "Alignment value to which kernel should be aligned" if X86_32 @@ -1075,6 +1103,11 @@ config HOTPLUG_CPU Say Y here to experiment with turning CPUs off and on, and to enable suspend on SMP systems. CPUs can be controlled through /sys/devices/system/cpu. + This is also required for suspend/hibernation on SMP systems. + + Say N if you want to disable CPU hotplug and don't need to + suspend. + config COMPAT_VDSO bool "Compat VDSO support" -- 1.5.3.4.1157.g0e74-dirty - 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/
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