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-rw-r--r--arch/x86/Kconfig66
1 files changed, 54 insertions, 12 deletions
diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index 46c3bff3ced2..79795af59810 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -22,6 +22,8 @@ config X86
def_bool y
select HAVE_AOUT if X86_32
select HAVE_UNSTABLE_SCHED_CLOCK
+ select ARCH_SUPPORTS_NUMA_BALANCING
+ select ARCH_WANTS_PROT_NUMA_PROT_NONE
select HAVE_IDE
select HAVE_OPROFILE
select HAVE_PCSPKR_PLATFORM
@@ -69,8 +71,8 @@ config X86
select HAVE_PERF_USER_STACK_DUMP
select HAVE_DEBUG_KMEMLEAK
select ANON_INODES
- select HAVE_ALIGNED_STRUCT_PAGE if SLUB && !M386
- select HAVE_CMPXCHG_LOCAL if !M386
+ select HAVE_ALIGNED_STRUCT_PAGE if SLUB
+ select HAVE_CMPXCHG_LOCAL
select HAVE_CMPXCHG_DOUBLE
select HAVE_ARCH_KMEMCHECK
select HAVE_USER_RETURN_NOTIFIER
@@ -106,12 +108,12 @@ config X86
select KTIME_SCALAR if X86_32
select GENERIC_STRNCPY_FROM_USER
select GENERIC_STRNLEN_USER
- select HAVE_RCU_USER_QS if X86_64
+ select HAVE_CONTEXT_TRACKING if X86_64
select HAVE_IRQ_TIME_ACCOUNTING
- select GENERIC_KERNEL_THREAD
- select GENERIC_KERNEL_EXECVE
select MODULES_USE_ELF_REL if X86_32
select MODULES_USE_ELF_RELA if X86_64
+ select CLONE_BACKWARDS if X86_32
+ select GENERIC_SIGALTSTACK
config INSTRUCTION_DECODER
def_bool y
@@ -171,13 +173,8 @@ config ARCH_MAY_HAVE_PC_FDC
def_bool y
depends on ISA_DMA_API
-config RWSEM_GENERIC_SPINLOCK
- def_bool y
- depends on !X86_XADD
-
config RWSEM_XCHGADD_ALGORITHM
def_bool y
- depends on X86_XADD
config GENERIC_CALIBRATE_DELAY
def_bool y
@@ -310,7 +307,7 @@ config X86_X2APIC
If you don't know what to do here, say N.
config X86_MPPARSE
- bool "Enable MPS table" if ACPI
+ bool "Enable MPS table" if ACPI || SFI
default y
depends on X86_LOCAL_APIC
---help---
@@ -374,6 +371,7 @@ config X86_NUMACHIP
depends on NUMA
depends on SMP
depends on X86_X2APIC
+ depends on PCI_MMCONFIG
---help---
Adds support for Numascale NumaChip large-SMP systems. Needed to
enable more than ~168 cores.
@@ -1100,7 +1098,7 @@ config HIGHMEM4G
config HIGHMEM64G
bool "64GB"
- depends on !M386 && !M486
+ depends on !M486
select X86_PAE
---help---
Select this if you have a 32-bit processor and more than 4
@@ -1698,6 +1696,50 @@ config HOTPLUG_CPU
automatically on SMP systems. )
Say N if you want to disable CPU hotplug.
+config BOOTPARAM_HOTPLUG_CPU0
+ bool "Set default setting of cpu0_hotpluggable"
+ default n
+ depends on HOTPLUG_CPU && EXPERIMENTAL
+ ---help---
+ Set whether default state of cpu0_hotpluggable is on or off.
+
+ Say Y here to enable CPU0 hotplug by default. If this switch
+ is turned on, there is no need to give cpu0_hotplug kernel
+ parameter and the CPU0 hotplug feature is enabled by default.
+
+ Please note: there are two known CPU0 dependencies if you want
+ to enable the CPU0 hotplug feature either by this switch or by
+ cpu0_hotplug kernel parameter.
+
+ First, resume from hibernate or suspend always starts from CPU0.
+ So hibernate and suspend are prevented if CPU0 is offline.
+
+ Second dependency is PIC interrupts always go to CPU0. CPU0 can not
+ offline if any interrupt can not migrate out of CPU0. There may
+ be other CPU0 dependencies.
+
+ Please make sure the dependencies are under your control before
+ you enable this feature.
+
+ Say N if you don't want to enable CPU0 hotplug feature by default.
+ You still can enable the CPU0 hotplug feature at boot by kernel
+ parameter cpu0_hotplug.
+
+config DEBUG_HOTPLUG_CPU0
+ def_bool n
+ prompt "Debug CPU0 hotplug"
+ depends on HOTPLUG_CPU && EXPERIMENTAL
+ ---help---
+ Enabling this option offlines CPU0 (if CPU0 can be offlined) as
+ soon as possible and boots up userspace with CPU0 offlined. User
+ can online CPU0 back after boot time.
+
+ To debug CPU0 hotplug, you need to enable CPU0 offline/online
+ feature by either turning on CONFIG_BOOTPARAM_HOTPLUG_CPU0 during
+ compilation or giving cpu0_hotplug kernel parameter at boot.
+
+ If unsure, say N.
+
config COMPAT_VDSO
def_bool y
prompt "Compat VDSO support"