diff options
| author | Borislav Petkov <bp@suse.de> | 2018-01-27 16:24:34 +0000 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2018-01-27 19:10:45 +0100 |
| commit | 64e16720ea0879f8ab4547e3b9758936d483909b (patch) | |
| tree | e8f8f39b1bfc79990ae218f451e035724d8e2d87 /arch/x86/include/asm/processor.h | |
| parent | 1dde7415e99933bb7293d6b2843752cbdb43ec11 (diff) | |
| download | lwn-64e16720ea0879f8ab4547e3b9758936d483909b.tar.gz lwn-64e16720ea0879f8ab4547e3b9758936d483909b.zip | |
x86/speculation: Simplify indirect_branch_prediction_barrier()
Make it all a function which does the WRMSR instead of having a hairy
inline asm.
[dwmw2: export it, fix CONFIG_RETPOLINE issues]
Signed-off-by: Borislav Petkov <bp@suse.de>
Signed-off-by: David Woodhouse <dwmw@amazon.co.uk>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: ak@linux.intel.com
Cc: dave.hansen@intel.com
Cc: karahmed@amazon.de
Cc: arjan@linux.intel.com
Cc: torvalds@linux-foundation.org
Cc: peterz@infradead.org
Cc: bp@alien8.de
Cc: pbonzini@redhat.com
Cc: tim.c.chen@linux.intel.com
Cc: gregkh@linux-foundation.org
Link: https://lkml.kernel.org/r/1517070274-12128-4-git-send-email-dwmw@amazon.co.uk
Diffstat (limited to 'arch/x86/include/asm/processor.h')
| -rw-r--r-- | arch/x86/include/asm/processor.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/arch/x86/include/asm/processor.h b/arch/x86/include/asm/processor.h index 9c18da64daa9..881ca3b1d6d4 100644 --- a/arch/x86/include/asm/processor.h +++ b/arch/x86/include/asm/processor.h @@ -970,4 +970,7 @@ bool xen_set_default_idle(void); void stop_this_cpu(void *dummy); void df_debug(struct pt_regs *regs, long error_code); + +void __ibp_barrier(void); + #endif /* _ASM_X86_PROCESSOR_H */ |