Merge tag 'dma-mapping-5.4' of git://git.infradead.org/users/hch/dma-mapping

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

diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig
index dab9dda34206478dd75037e9bfea7245715fc2e0..835a1509882bf076c4ad9b9bbbc01bfba1c4de67 100644 (file)
--- a/arch/arm64/Kconfig
+++ b/arch/arm64/Kconfig
@@ -147,6 +147,7 @@ config ARM64
        select HAVE_FAST_GUP
        select HAVE_FTRACE_MCOUNT_RECORD
        select HAVE_FUNCTION_TRACER
+       select HAVE_FUNCTION_ERROR_INJECTION
        select HAVE_FUNCTION_GRAPH_TRACER
        select HAVE_GCC_PLUGINS
        select HAVE_HW_BREAKPOINT if PERF_EVENTS
@@ -285,7 +286,7 @@ config PGTABLE_LEVELS
        int
        default 2 if ARM64_16K_PAGES && ARM64_VA_BITS_36
        default 2 if ARM64_64K_PAGES && ARM64_VA_BITS_42
-       default 3 if ARM64_64K_PAGES && (ARM64_VA_BITS_48 || ARM64_USER_VA_BITS_52)
+       default 3 if ARM64_64K_PAGES && (ARM64_VA_BITS_48 || ARM64_VA_BITS_52)
        default 3 if ARM64_4K_PAGES && ARM64_VA_BITS_39
        default 3 if ARM64_16K_PAGES && ARM64_VA_BITS_47
        default 4 if !ARM64_64K_PAGES && ARM64_VA_BITS_48
@@ -296,6 +297,21 @@ config ARCH_SUPPORTS_UPROBES
 config ARCH_PROC_KCORE_TEXT
        def_bool y
 
+config KASAN_SHADOW_OFFSET
+       hex
+       depends on KASAN
+       default 0xdfffa00000000000 if (ARM64_VA_BITS_48 || ARM64_VA_BITS_52) && !KASAN_SW_TAGS
+       default 0xdfffd00000000000 if ARM64_VA_BITS_47 && !KASAN_SW_TAGS
+       default 0xdffffe8000000000 if ARM64_VA_BITS_42 && !KASAN_SW_TAGS
+       default 0xdfffffd000000000 if ARM64_VA_BITS_39 && !KASAN_SW_TAGS
+       default 0xdffffffa00000000 if ARM64_VA_BITS_36 && !KASAN_SW_TAGS
+       default 0xefff900000000000 if (ARM64_VA_BITS_48 || ARM64_VA_BITS_52) && KASAN_SW_TAGS
+       default 0xefffc80000000000 if ARM64_VA_BITS_47 && KASAN_SW_TAGS
+       default 0xeffffe4000000000 if ARM64_VA_BITS_42 && KASAN_SW_TAGS
+       default 0xefffffc800000000 if ARM64_VA_BITS_39 && KASAN_SW_TAGS
+       default 0xeffffff900000000 if ARM64_VA_BITS_36 && KASAN_SW_TAGS
+       default 0xffffffffffffffff
+
 source "arch/arm64/Kconfig.platforms"
 
 menu "Kernel Features"
@@ -743,13 +759,14 @@ config ARM64_VA_BITS_47
 config ARM64_VA_BITS_48
        bool "48-bit"
 
-config ARM64_USER_VA_BITS_52
-       bool "52-bit (user)"
+config ARM64_VA_BITS_52
+       bool "52-bit"
        depends on ARM64_64K_PAGES && (ARM64_PAN || !ARM64_SW_TTBR0_PAN)
        help
          Enable 52-bit virtual addressing for userspace when explicitly
-         requested via a hint to mmap(). The kernel will continue to
-         use 48-bit virtual addresses for its own mappings.
+         requested via a hint to mmap(). The kernel will also use 52-bit
+         virtual addresses for its own mappings (provided HW support for
+         this feature is available, otherwise it reverts to 48-bit).
 
          NOTE: Enabling 52-bit virtual addressing in conjunction with
          ARMv8.3 Pointer Authentication will result in the PAC being
@@ -762,7 +779,7 @@ endchoice
 
 config ARM64_FORCE_52BIT
        bool "Force 52-bit virtual addresses for userspace"
-       depends on ARM64_USER_VA_BITS_52 && EXPERT
+       depends on ARM64_VA_BITS_52 && EXPERT
        help
          For systems with 52-bit userspace VAs enabled, the kernel will attempt
          to maintain compatibility with older software by providing 48-bit VAs
@@ -779,7 +796,8 @@ config ARM64_VA_BITS
        default 39 if ARM64_VA_BITS_39
        default 42 if ARM64_VA_BITS_42
        default 47 if ARM64_VA_BITS_47
-       default 48 if ARM64_VA_BITS_48 || ARM64_USER_VA_BITS_52
+       default 48 if ARM64_VA_BITS_48
+       default 52 if ARM64_VA_BITS_52
 
 choice
        prompt "Physical address space size"
@@ -1109,6 +1127,15 @@ config ARM64_SW_TTBR0_PAN
          zeroed area and reserved ASID. The user access routines
          restore the valid TTBR0_EL1 temporarily.
 
+config ARM64_TAGGED_ADDR_ABI
+       bool "Enable the tagged user addresses syscall ABI"
+       default y
+       help
+         When this option is enabled, user applications can opt in to a
+         relaxed ABI via prctl() allowing tagged addresses to be passed
+         to system calls as pointer arguments. For details, see
+         Documentation/arm64/tagged-address-abi.txt.
+
 menuconfig COMPAT
        bool "Kernel support for 32-bit EL0"
        depends on ARM64_4K_PAGES || EXPERT
@@ -1262,6 +1289,7 @@ config ARM64_PAN
 
 config ARM64_LSE_ATOMICS
        bool "Atomic instructions"
+       depends on JUMP_LABEL
        default y
        help
          As part of the Large System Extensions, ARMv8.1 introduces new
@@ -1466,6 +1494,7 @@ endif
 
 config RELOCATABLE
        bool
+       select ARCH_HAS_RELR
        help
          This builds the kernel as a Position Independent Executable (PIE),
          which retains all relocation metadata required to relocate the