diff options
Diffstat (limited to 'arch/powerpc/Kconfig')
| -rw-r--r-- | arch/powerpc/Kconfig | 52 |
1 files changed, 32 insertions, 20 deletions
diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig index c33e3ad2c8fd..38f3b7e47ec5 100644 --- a/arch/powerpc/Kconfig +++ b/arch/powerpc/Kconfig @@ -114,7 +114,6 @@ config PPC select HAVE_PERF_EVENTS select HAVE_REGS_AND_STACK_ACCESS_API select HAVE_HW_BREAKPOINT if PERF_EVENTS && PPC_BOOK3S_64 - select HAVE_GENERIC_HARDIRQS select ARCH_WANT_IPC_PARSE_VERSION select SPARSE_IRQ select IRQ_DOMAIN @@ -138,6 +137,7 @@ config PPC select ARCH_USE_BUILTIN_BSWAP select OLD_SIGSUSPEND select OLD_SIGACTION if PPC32 + select HAVE_DEBUG_STACKOVERFLOW config EARLY_PRINTK bool @@ -298,7 +298,7 @@ config HUGETLB_PAGE_SIZE_VARIABLE config MATH_EMULATION bool "Math emulation" - depends on 4xx || 8xx || E200 || PPC_MPC832x || E500 + depends on 4xx || 8xx || PPC_MPC832x || BOOKE ---help--- Some PowerPC chips designed for embedded applications do not have a floating-point unit and therefore do not implement the @@ -307,6 +307,30 @@ config MATH_EMULATION unit, which will allow programs that use floating-point instructions to run. + This is also useful to emulate missing (optional) instructions + such as fsqrt on cores that do have an FPU but do not implement + them (such as Freescale BookE). + +choice + prompt "Math emulation options" + default MATH_EMULATION_FULL + depends on MATH_EMULATION + +config MATH_EMULATION_FULL + bool "Emulate all the floating point instructions" + ---help--- + Select this option will enable the kernel to support to emulate + all the floating point instructions. If your SoC doesn't have + a FPU, you should select this. + +config MATH_EMULATION_HW_UNIMPLEMENTED + bool "Just emulate the FPU unimplemented instructions" + ---help--- + Select this if you know there does have a hardware FPU on your + SoC, but some floating point instructions are not implemented by that. + +endchoice + config PPC_TRANSACTIONAL_MEM bool "Transactional Memory support for POWERPC" depends on PPC_BOOK3S_64 @@ -315,17 +339,6 @@ config PPC_TRANSACTIONAL_MEM ---help--- Support user-mode Transactional Memory on POWERPC. -config 8XX_MINIMAL_FPEMU - bool "Minimal math emulation for 8xx" - depends on 8xx && !MATH_EMULATION - help - Older arch/ppc kernels still emulated a few floating point - instructions such as load and store, even when full math - emulation is disabled. Say "Y" here if you want to preserve - this behavior. - - It is recommended that you build a soft-float userspace instead. - config IOMMU_HELPER def_bool PPC64 @@ -341,7 +354,7 @@ config SWIOTLB config HOTPLUG_CPU bool "Support for enabling/disabling CPUs" - depends on SMP && HOTPLUG && (PPC_PSERIES || \ + depends on SMP && (PPC_PSERIES || \ PPC_PMAC || PPC_POWERNV || (PPC_85xx && !PPC_E500MC)) ---help--- Say Y here to be able to disable and re-enable individual @@ -375,9 +388,9 @@ config KEXEC It is an ongoing process to be certain the hardware in a machine is properly shutdown, so do not be surprised if this code does not - initially work for you. It may help to enable device hotplugging - support. As of this writing the exact hardware interface is - strongly in flux, so no good recommendation can be made. + initially work for you. As of this writing the exact hardware + interface is strongly in flux, so no good recommendation can be + made. config CRASH_DUMP bool "Build a kdump crash kernel" @@ -572,7 +585,7 @@ config SCHED_SMT config PPC_DENORMALISATION bool "PowerPC denormalisation exception handling" depends on PPC_BOOK3S_64 - default "n" + default "y" if PPC_POWERNV ---help--- Add support for handling denormalisation of single precision values. Useful for bare metal only. If unsure say Y here. @@ -674,7 +687,6 @@ config SBUS config FSL_SOC bool - select HAVE_CAN_FLEXCAN if NET && CAN config FSL_PCI bool @@ -734,7 +746,6 @@ config PCI default y if !40x && !CPM2 && !8xx && !PPC_83xx \ && !PPC_85xx && !PPC_86xx && !GAMECUBE_COMMON default PCI_QSPAN if !4xx && !CPM2 && 8xx - select ARCH_SUPPORTS_MSI select GENERIC_PCI_IOMAP help Find out whether your system includes a PCI bus. PCI is the name of @@ -986,6 +997,7 @@ config RELOCATABLE must live at a different physical address than the primary kernel. +# This value must have zeroes in the bottom 60 bits otherwise lots will break config PAGE_OFFSET hex default "0xc000000000000000" |