diff options
| author | Thomas Gleixner <tglx@linutronix.de> | 2018-01-18 18:28:26 +0300 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2018-01-19 18:31:28 +0300 |
| commit | 6f41c34d69eb005e7848716bbcafc979b35037d5 (patch) | |
| tree | b5f5f6275ac19cc185a127c2f8a913f46019d705 /arch/x86/include/asm/traps.h | |
| parent | 6cfb521ac0d5b97470883ff9b7facae264b7ab12 (diff) | |
| download | linux-6f41c34d69eb005e7848716bbcafc979b35037d5.tar.xz | |
x86/mce: Make machine check speculation protected
The machine check idtentry uses an indirect branch directly from the low
level code. This evades the speculation protection.
Replace it by a direct call into C code and issue the indirect call there
so the compiler can apply the proper speculation protection.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by:Borislav Petkov <bp@alien8.de>
Reviewed-by: David Woodhouse <dwmw@amazon.co.uk>
Niced-by: Peter Zijlstra <peterz@infradead.org>
Cc: stable@vger.kernel.org
Link: https://lkml.kernel.org/r/alpine.DEB.2.20.1801181626290.1847@nanos
Diffstat (limited to 'arch/x86/include/asm/traps.h')
| -rw-r--r-- | arch/x86/include/asm/traps.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/x86/include/asm/traps.h b/arch/x86/include/asm/traps.h index 31051f35cbb7..3de69330e6c5 100644 --- a/arch/x86/include/asm/traps.h +++ b/arch/x86/include/asm/traps.h @@ -88,6 +88,7 @@ dotraplinkage void do_simd_coprocessor_error(struct pt_regs *, long); #ifdef CONFIG_X86_32 dotraplinkage void do_iret_error(struct pt_regs *, long); #endif +dotraplinkage void do_mce(struct pt_regs *, long); static inline int get_si_code(unsigned long condition) { |