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| author | Andy Lutomirski <luto@kernel.org> | 2017-07-11 10:33:38 -0500 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2017-07-18 10:56:22 +0200 |
| commit | 1d3e53e8624a3ec85f4041ca6d973da7c1575938 (patch) | |
| tree | b8e2bb366529b5eb91c54cbd15bf437c8434dd0a /arch/x86/Kconfig.debug | |
| parent | cb8c65ccff7f77d0285f1b126c72d37b2572c865 (diff) | |
| download | linux-0-day-1d3e53e8624a3ec85f4041ca6d973da7c1575938.tar.gz linux-0-day-1d3e53e8624a3ec85f4041ca6d973da7c1575938.tar.xz | |
x86/entry/64: Refactor IRQ stacks and make them NMI-safe
This will allow IRQ stacks to nest inside NMIs or similar entries
that can happen during IRQ stack setup or teardown.
The new macros won't work correctly if they're invoked with IRQs on.
Add a check under CONFIG_DEBUG_ENTRY to detect that.
Signed-off-by: Andy Lutomirski <luto@kernel.org>
[ Use %r10 instead of %r11 in xen_do_hypervisor_callback to make objtool
and ORC unwinder's lives a little easier. ]
Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Denys Vlasenko <dvlasenk@redhat.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Jiri Slaby <jslaby@suse.cz>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: live-patching@vger.kernel.org
Link: http://lkml.kernel.org/r/b0b2ff5fb97d2da2e1d7e1f380190c92545c8bb5.1499786555.git.jpoimboe@redhat.com
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, 0 insertions, 2 deletions
diff --git a/arch/x86/Kconfig.debug b/arch/x86/Kconfig.debug index fcb7604172cec..353ed09f5fba7 100644 --- a/arch/x86/Kconfig.debug +++ b/arch/x86/Kconfig.debug @@ -305,8 +305,6 @@ config DEBUG_ENTRY Some of these sanity checks may slow down kernel entries and exits or otherwise impact performance. - This is currently used to help test NMI code. - If unsure, say N. config DEBUG_NMI_SELFTEST |