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| author | Andy Lutomirski <luto@kernel.org> | 2019-11-21 07:12:38 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2019-11-26 21:53:34 +0100 |
| commit | 93efbde2c331004d8053f04b4bf0ca3e630b474a (patch) | |
| tree | da94642f314fb062e92a555eca60d8d072e98ae7 /arch/x86/Kconfig.debug | |
| parent | lkdtm: Add a DOUBLE_FAULT crash type on x86 (diff) | |
| download | linux-93efbde2c331004d8053f04b4bf0ca3e630b474a.tar.xz linux-93efbde2c331004d8053f04b4bf0ca3e630b474a.zip | |
x86/traps: Disentangle the 32-bit and 64-bit doublefault code
The 64-bit doublefault handler is much nicer than the 32-bit one.
As a first step toward unifying them, make the 64-bit handler
self-contained. This should have no effect no functional effect
except in the odd case of x86_64 with CONFIG_DOUBLEFAULT=n in which
case it will change the logging a bit.
This also gets rid of CONFIG_DOUBLEFAULT configurability on 64-bit
kernels. It didn't do anything useful -- CONFIG_DOUBLEFAULT=n
didn't actually disable doublefault handling on x86_64.
Signed-off-by: Andy Lutomirski <luto@kernel.org>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'arch/x86/Kconfig.debug')
| -rw-r--r-- | arch/x86/Kconfig.debug | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/x86/Kconfig.debug b/arch/x86/Kconfig.debug index 409c00f74e60..c4eab8ed33a3 100644 --- a/arch/x86/Kconfig.debug +++ b/arch/x86/Kconfig.debug @@ -117,7 +117,7 @@ config DEBUG_WX config DOUBLEFAULT default y - bool "Enable doublefault exception handler" if EXPERT + bool "Enable doublefault exception handler" if EXPERT && X86_32 ---help--- This option allows trapping of rare doublefault exceptions that would otherwise cause a system to silently reboot. Disabling this |