config ARCH_HAS_CPU_RELAX
def_bool y
+config ARCH_HAS_DEFAULT_IDLE
+ def_bool y
+
config ARCH_HAS_CACHE_LINE_SIZE
def_bool y
# need this always selected by IOMMU for the VIA workaround
config SWIOTLB
- bool
+ def_bool y if X86_64
help
Support for software bounce buffers used on x86-64 systems
which don't have a hardware IOMMU (e.g. the current generation
low memory. Setting this option will put user-space page table
entries in high memory.
+config X86_RESERVE_LOW_64K
+ bool "Reserve low 64K of RAM on AMI/Phoenix BIOSen"
+ default y
+ help
+ Reserve the first 64K of physical RAM on BIOSes that are known
+ to potentially corrupt that memory range. A numbers of BIOSes are
+ known to utilize this area during suspend/resume, so it must not
+ be used by the kernel.
+
+ Set this to N if you are absolutely sure that you trust the BIOS
+ to get all its memory reservations and usages right.
+
+ If you have doubts about the BIOS (e.g. suspend/resume does not
+ work or there's kernel crashes after certain hardware hotplug
+ events) and it's not AMI or Phoenix, then you might want to enable
+ X86_CHECK_BIOS_CORRUPTION=y to allow the kernel to check typical
+ corruption patterns.
+
+ Say Y if unsure.
+
config MATH_EMULATION
bool
prompt "Math emulation" if X86_32