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authorLinus Torvalds <torvalds@linux-foundation.org>2013-09-04 09:38:10 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2013-09-04 09:38:10 -0700
commitaafcd5d75797ac423f6a03ce1f801933d4b114dc (patch)
tree138af0b67e456b5fc8aa4ecff7f160f79d355e70 /arch/x86/Kconfig
parent6832d9652f395f7d13003e3884942c40f52ac1fa (diff)
parenta02150610776f66b40257624822a879311592bb2 (diff)
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Merge branch 'x86-kaslr-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 relocation changes from Ingo Molnar: "This tree contains a single change, ELF relocation handling in C - one of the kernel randomization patches that makes sense even without randomization present upstream" * 'x86-kaslr-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: x86, relocs: Move ELF relocation handling to C
Diffstat (limited to 'arch/x86/Kconfig')
-rw-r--r--arch/x86/Kconfig8
1 files changed, 6 insertions, 2 deletions
diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index ff47e230d355..b710efdec9a0 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -1716,9 +1716,10 @@ config X86_NEED_RELOCS
depends on X86_32 && RELOCATABLE
config PHYSICAL_ALIGN
- hex "Alignment value to which kernel should be aligned" if X86_32
+ hex "Alignment value to which kernel should be aligned"
default "0x1000000"
- range 0x2000 0x1000000
+ range 0x2000 0x1000000 if X86_32
+ range 0x200000 0x1000000 if X86_64
---help---
This value puts the alignment restrictions on physical address
where kernel is loaded and run from. Kernel is compiled for an
@@ -1736,6 +1737,9 @@ config PHYSICAL_ALIGN
end result is that kernel runs from a physical address meeting
above alignment restrictions.
+ On 32-bit this value must be a multiple of 0x2000. On 64-bit
+ this value must be a multiple of 0x200000.
+
Don't change this unless you know what you are doing.
config HOTPLUG_CPU
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