Merge branch 'x86-apic-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git...

[cascardo/linux.git] / arch / x86 / Kconfig

diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index a39b7e5..ba397bd 100644 (file)
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -24,6 +24,7 @@ config X86
        select ARCH_MIGHT_HAVE_ACPI_PDC if ACPI
        select ARCH_HAS_DEBUG_STRICT_USER_COPY_CHECKS
        select ARCH_HAS_FAST_MULTIPLIER
+       select ARCH_HAS_GCOV_PROFILE_ALL
        select ARCH_MIGHT_HAVE_PC_PARPORT
        select ARCH_MIGHT_HAVE_PC_SERIO
        select HAVE_AOUT if X86_32
@@ -248,10 +249,6 @@ config HAVE_INTEL_TXT
        def_bool y
        depends on INTEL_IOMMU && ACPI
 
-config X86_INTEL_MPX
-       def_bool y
-       depends on CPU_SUP_INTEL
-
 config X86_32_SMP
        def_bool y
        depends on X86_32 && SMP
@@ -1593,6 +1590,32 @@ config X86_SMAP
 
          If unsure, say Y.
 
+config X86_INTEL_MPX
+       prompt "Intel MPX (Memory Protection Extensions)"
+       def_bool n
+       depends on CPU_SUP_INTEL
+       ---help---
+         MPX provides hardware features that can be used in
+         conjunction with compiler-instrumented code to check
+         memory references.  It is designed to detect buffer
+         overflow or underflow bugs.
+
+         This option enables running applications which are
+         instrumented or otherwise use MPX.  It does not use MPX
+         itself inside the kernel or to protect the kernel
+         against bad memory references.
+
+         Enabling this option will make the kernel larger:
+         ~8k of kernel text and 36 bytes of data on a 64-bit
+         defconfig.  It adds a long to the 'mm_struct' which
+         will increase the kernel memory overhead of each
+         process and adds some branches to paths used during
+         exec() and munmap().
+
+         For details, see Documentation/x86/intel_mpx.txt
+
+         If unsure, say N.
+
 config EFI
        bool "EFI runtime service support"
        depends on ACPI