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-rw-r--r--arch/arm/mm/Kconfig26
1 files changed, 24 insertions, 2 deletions
diff --git a/arch/arm/mm/Kconfig b/arch/arm/mm/Kconfig
index 5bd7c89a6045..346ae14824a5 100644
--- a/arch/arm/mm/Kconfig
+++ b/arch/arm/mm/Kconfig
@@ -572,6 +572,8 @@ config CPU_TLB_V6
config CPU_TLB_V7
bool
+config VERIFY_PERMISSION_FAULT
+ bool
endif
config CPU_HAS_ASID
@@ -760,7 +762,8 @@ config CACHE_FEROCEON_L2_WRITETHROUGH
config CACHE_L2X0
bool "Enable the L2x0 outer cache controller"
depends on REALVIEW_EB_ARM11MP || MACH_REALVIEW_PB11MP || MACH_REALVIEW_PB1176 || \
- REALVIEW_EB_A9MP || ARCH_MX35 || ARCH_MX31 || MACH_REALVIEW_PBX || ARCH_NOMADIK || ARCH_OMAP4
+ REALVIEW_EB_A9MP || ARCH_MX35 || ARCH_MX31 || MACH_REALVIEW_PBX || \
+ ARCH_NOMADIK || ARCH_OMAP4 || ARCH_U8500 || ARCH_VEXPRESS_CA9X4
default y
select OUTER_CACHE
select OUTER_CACHE_SYNC
@@ -769,7 +772,7 @@ config CACHE_L2X0
config CACHE_TAUROS2
bool "Enable the Tauros2 L2 cache controller"
- depends on ARCH_DOVE
+ depends on (ARCH_DOVE || ARCH_MMP)
default y
select OUTER_CACHE
help
@@ -789,6 +792,25 @@ config ARM_L1_CACHE_SHIFT
default 6 if ARM_L1_CACHE_SHIFT_6
default 5
+config ARM_DMA_MEM_BUFFERABLE
+ bool "Use non-cacheable memory for DMA" if CPU_V6 && !CPU_V7
+ default y if CPU_V6 || CPU_V7
+ help
+ Historically, the kernel has used strongly ordered mappings to
+ provide DMA coherent memory. With the advent of ARMv7, mapping
+ memory with differing types results in unpredictable behaviour,
+ so on these CPUs, this option is forced on.
+
+ Multiple mappings with differing attributes is also unpredictable
+ on ARMv6 CPUs, but since they do not have aggressive speculative
+ prefetch, no harm appears to occur.
+
+ However, drivers may be missing the necessary barriers for ARMv6,
+ and therefore turning this on may result in unpredictable driver
+ behaviour. Therefore, we offer this as an option.
+
+ You are recommended say 'Y' here and debug any affected drivers.
+
config ARCH_HAS_BARRIERS
bool
help
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