select HAVE_STACKPROTECTOR if PPC64 && $(cc-option,-mstack-protector-guard=tls -mstack-protector-guard-reg=r13)
select HAVE_STACKPROTECTOR if PPC32 && $(cc-option,-mstack-protector-guard=tls -mstack-protector-guard-reg=r2)
select HAVE_CONTEXT_TRACKING if PPC64
- select HAVE_TIF_NOHZ if PPC64
select HAVE_DEBUG_KMEMLEAK
select HAVE_DEBUG_STACKOVERFLOW
select HAVE_DYNAMIC_FTRACE
Say N if you are unsure.
config PPC_QUEUED_SPINLOCKS
- bool "Queued spinlocks"
+ bool "Queued spinlocks" if EXPERT
depends on SMP
+ default PPC_BOOK3S_64
help
Say Y here to use queued spinlocks which give better scalability and
fairness on large SMP and NUMA systems without harming single threaded
performance.
- This option is currently experimental, the code is more complex and
- less tested so it defaults to "N" for the moment.
-
- If unsure, say "N".
-
config ARCH_CPU_PROBE_RELEASE
def_bool y
depends on HOTPLUG_CPU
def_bool y
depends on MEMORY_HOTPLUG
-config STDBINUTILS
- bool "Using standard binutils settings"
- depends on 44x
- default y
- help
- Turning this option off allows you to select 256KB PAGE_SIZE on 44x.
- Note, that kernel will be able to run only those applications,
- which had been compiled using binutils later than 2.17.50.0.3 with
- '-zmax-page-size' set to 256K (the default is 64K). Or, if using
- the older binutils, you can patch them with a trivial patch, which
- changes the ELF_MAXPAGESIZE definition from 0x10000 to 0x40000.
-
choice
prompt "Page size"
default PPC_4K_PAGES
select HAVE_ARCH_SOFT_DIRTY if PPC_BOOK3S_64
config PPC_256K_PAGES
- bool "256k page size"
- depends on 44x && !STDBINUTILS
+ bool "256k page size (Requires non-standard binutils settings)"
+ depends on 44x && !PPC_47x
help
Make the page size 256k.
- As the ELF standard only requires alignment to support page
- sizes up to 64k, you will need to compile all of your user
- space applications with a non-standard binutils settings
- (see the STDBINUTILS description for details).
-
- Say N unless you know what you are doing.
+ The kernel will only be able to run applications that have been
+ compiled with '-zmax-page-size' set to 256K (the default is 64K) using
+ binutils later than 2.17.50.0.3, or by patching the ELF_MAXPAGESIZE
+ definition from 0x10000 to 0x40000 in older versions.
endchoice