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authorBorislav Petkov <bp@suse.de>2013-05-09 12:02:29 +0200
committerH. Peter Anvin <hpa@linux.intel.com>2013-05-13 13:42:44 -0700
commit4d067d8e056d76a3327f0517c7722db55e7888fc (patch)
tree995c147a839866f5d1c2c700c27214755054cd7d /arch/x86/Kconfig.debug
parentf722406faae2d073cc1d01063d1123c35425939e (diff)
downloadlinux-4d067d8e056d76a3327f0517c7722db55e7888fc.tar.gz
x86: Extend #DF debugging aid to 64-bit
It is sometimes very helpful to be able to pinpoint the location which causes a double fault before it turns into a triple fault and the machine reboots. We have this for 32-bit already so extend it to 64-bit. On 64-bit we get the register snapshot at #DF time and not from the first exception which actually causes the #DF. It should be close enough, though. [ hpa: and definitely better than nothing, which is what we have now. ] Signed-off-by: Borislav Petkov <bp@suse.de> Link: http://lkml.kernel.org/r/1368093749-31296-1-git-send-email-bp@alien8.de Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
Diffstat (limited to 'arch/x86/Kconfig.debug')
-rw-r--r--arch/x86/Kconfig.debug1
1 files changed, 0 insertions, 1 deletions
diff --git a/arch/x86/Kconfig.debug b/arch/x86/Kconfig.debug
index c198b7e13e7..b6a770132b6 100644
--- a/arch/x86/Kconfig.debug
+++ b/arch/x86/Kconfig.debug
@@ -122,7 +122,6 @@ config DEBUG_NX_TEST
config DOUBLEFAULT
default y
bool "Enable doublefault exception handler" if EXPERT
- depends on X86_32
---help---
This option allows trapping of rare doublefault exceptions that
would otherwise cause a system to silently reboot. Disabling this