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

[pandora-kernel.git] / arch / x86 / Kconfig

diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index a1bd569..b867649 100644 (file)
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -1341,25 +1341,34 @@ config X86_BOOTPARAM_MEMORY_CORRUPTION_CHECK
          Set whether the default state of memory_corruption_check is
          on or off.
 
-config X86_RESERVE_LOW_64K
-       bool "Reserve low 64K of RAM on AMI/Phoenix BIOSen"
-       default y
-       ---help---
-         Reserve the first 64K of physical RAM on BIOSes that are known
-         to potentially corrupt that memory range. A numbers of BIOSes are
-         known to utilize this area during suspend/resume, so it must not
-         be used by the kernel.
-
-         Set this to N if you are absolutely sure that you trust the BIOS
-         to get all its memory reservations and usages right.
-
-         If you have doubts about the BIOS (e.g. suspend/resume does not
-         work or there's kernel crashes after certain hardware hotplug
-         events) and it's not AMI or Phoenix, then you might want to enable
-         X86_CHECK_BIOS_CORRUPTION=y to allow the kernel to check typical
-         corruption patterns.
-
-         Say Y if unsure.
+config X86_RESERVE_LOW
+       int "Amount of low memory, in kilobytes, to reserve for the BIOS"
+       default 64
+       range 4 640
+       ---help---
+         Specify the amount of low memory to reserve for the BIOS.
+
+         The first page contains BIOS data structures that the kernel
+         must not use, so that page must always be reserved.
+
+         By default we reserve the first 64K of physical RAM, as a
+         number of BIOSes are known to corrupt that memory range
+         during events such as suspend/resume or monitor cable
+         insertion, so it must not be used by the kernel.
+
+         You can set this to 4 if you are absolutely sure that you
+         trust the BIOS to get all its memory reservations and usages
+         right.  If you know your BIOS have problems beyond the
+         default 64K area, you can set this to 640 to avoid using the
+         entire low memory range.
+
+         If you have doubts about the BIOS (e.g. suspend/resume does
+         not work or there's kernel crashes after certain hardware
+         hotplug events) then you might want to enable
+         X86_CHECK_BIOS_CORRUPTION=y to allow the kernel to check
+         typical corruption patterns.
+
+         Leave this to the default value of 64 if you are unsure.
 
 config MATH_EMULATION
        bool