arm64: add support for ioremap() block mappings

[linux-2.6-block.git] / arch / arm64 / Kconfig

diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig
index d6ebffdc6bb11dce0d2b6c96a87b976b4de5115b..cfa1cc90ebf46ea3b3e1822969e5a4e5a611eec0 100644 (file)
--- a/arch/arm64/Kconfig
+++ b/arch/arm64/Kconfig
@@ -3,6 +3,7 @@ config ARM64
        select ACPI_CCA_REQUIRED if ACPI
        select ACPI_GENERIC_GSI if ACPI
        select ACPI_REDUCED_HARDWARE_ONLY if ACPI
+       select ARCH_HAS_DEVMEM_IS_ALLOWED
        select ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE
        select ARCH_HAS_ELF_RANDOMIZE
        select ARCH_HAS_GCOV_PROFILE_ALL
@@ -13,6 +14,7 @@ config ARM64
        select ARCH_WANT_OPTIONAL_GPIOLIB
        select ARCH_WANT_COMPAT_IPC_PARSE_VERSION
        select ARCH_WANT_FRAME_POINTERS
+       select ARCH_HAS_UBSAN_SANITIZE_ALL
        select ARM_AMBA
        select ARM_ARCH_TIMER
        select ARM_GIC
@@ -48,9 +50,12 @@ config ARM64
        select HAVE_ALIGNED_STRUCT_PAGE if SLUB
        select HAVE_ARCH_AUDITSYSCALL
        select HAVE_ARCH_BITREVERSE
+       select HAVE_ARCH_HUGE_VMAP
        select HAVE_ARCH_JUMP_LABEL
        select HAVE_ARCH_KASAN if SPARSEMEM_VMEMMAP && !(ARM64_16K_PAGES && ARM64_VA_BITS_48)
        select HAVE_ARCH_KGDB
+       select HAVE_ARCH_MMAP_RND_BITS
+       select HAVE_ARCH_MMAP_RND_COMPAT_BITS if COMPAT
        select HAVE_ARCH_SECCOMP_FILTER
        select HAVE_ARCH_TRACEHOOK
        select HAVE_BPF_JIT
@@ -61,7 +66,6 @@ config ARM64
        select HAVE_DEBUG_BUGVERBOSE
        select HAVE_DEBUG_KMEMLEAK
        select HAVE_DMA_API_DEBUG
-       select HAVE_DMA_ATTRS
        select HAVE_DMA_CONTIGUOUS
        select HAVE_DYNAMIC_FTRACE
        select HAVE_EFFICIENT_UNALIGNED_ACCESS
@@ -106,6 +110,33 @@ config ARCH_PHYS_ADDR_T_64BIT
 config MMU
        def_bool y
 
+config ARCH_MMAP_RND_BITS_MIN
+       default 14 if ARM64_64K_PAGES
+       default 16 if ARM64_16K_PAGES
+       default 18
+
+# max bits determined by the following formula:
+#  VA_BITS - PAGE_SHIFT - 3
+config ARCH_MMAP_RND_BITS_MAX
+       default 19 if ARM64_VA_BITS=36
+       default 24 if ARM64_VA_BITS=39
+       default 27 if ARM64_VA_BITS=42
+       default 30 if ARM64_VA_BITS=47
+       default 29 if ARM64_VA_BITS=48 && ARM64_64K_PAGES
+       default 31 if ARM64_VA_BITS=48 && ARM64_16K_PAGES
+       default 33 if ARM64_VA_BITS=48
+       default 14 if ARM64_64K_PAGES
+       default 16 if ARM64_16K_PAGES
+       default 18
+
+config ARCH_MMAP_RND_COMPAT_BITS_MIN
+       default 7 if ARM64_64K_PAGES
+       default 9 if ARM64_16K_PAGES
+       default 11
+
+config ARCH_MMAP_RND_COMPAT_BITS_MAX
+       default 16
+
 config NO_IOPORT_MAP
        def_bool y if !PCI
 
@@ -508,6 +539,9 @@ config HOTPLUG_CPU
 source kernel/Kconfig.preempt
 source kernel/Kconfig.hz
 
+config ARCH_SUPPORTS_DEBUG_PAGEALLOC
+       def_bool y
+
 config ARCH_HAS_HOLES_MEMORYMODEL
        def_bool y if SPARSEMEM
 
@@ -723,10 +757,40 @@ config ARM64_LSE_ATOMICS
 
 endmenu
 
+config ARM64_UAO
+       bool "Enable support for User Access Override (UAO)"
+       default y
+       help
+         User Access Override (UAO; part of the ARMv8.2 Extensions)
+         causes the 'unprivileged' variant of the load/store instructions to
+         be overriden to be privileged.
+
+         This option changes get_user() and friends to use the 'unprivileged'
+         variant of the load/store instructions. This ensures that user-space
+         really did have access to the supplied memory. When addr_limit is
+         set to kernel memory the UAO bit will be set, allowing privileged
+         access to kernel memory.
+
+         Choosing this option will cause copy_to_user() et al to use user-space
+         memory permissions.
+
+         The feature is detected at runtime, the kernel will use the
+         regular load/store instructions if the cpu does not implement the
+         feature.
+
 endmenu
 
 menu "Boot options"
 
+config ARM64_ACPI_PARKING_PROTOCOL
+       bool "Enable support for the ARM64 ACPI parking protocol"
+       depends on ACPI
+       help
+         Enable support for the ARM64 ACPI parking protocol. If disabled
+         the kernel will not allow booting through the ARM64 ACPI parking
+         protocol even if the corresponding data is present in the ACPI
+         MADT table.
+
 config CMDLINE
        string "Default kernel command string"
        default ""