diff options
author | Borislav Petkov <bp@alien8.de> | 2018-01-27 16:24:33 +0000 |
---|---|---|
committer | Thomas Gleixner <tglx@linutronix.de> | 2018-01-27 19:10:45 +0100 |
commit | 1dde7415e99933bb7293d6b2843752cbdb43ec11 (patch) | |
tree | d78520e6c433ab33c8edd45746895b9be08855b7 /arch/x86/include/asm/asm-prototypes.h | |
parent | 2961298efe1ea1b6fc0d7ee8b76018fa6c0bcef2 (diff) |
x86/retpoline: Simplify vmexit_fill_RSB()
Simplify it to call an asm-function instead of pasting 41 insn bytes at
every call site. Also, add alignment to the macro as suggested here:
https://support.google.com/faqs/answer/7625886
[dwmw2: Clean up comments, let it clobber %ebx and just tell the compiler]
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/1517070274-12128-3-git-send-email-dwmw@amazon.co.uk
Diffstat (limited to 'arch/x86/include/asm/asm-prototypes.h')
-rw-r--r-- | arch/x86/include/asm/asm-prototypes.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/arch/x86/include/asm/asm-prototypes.h b/arch/x86/include/asm/asm-prototypes.h index 1908214b9125..4d111616524b 100644 --- a/arch/x86/include/asm/asm-prototypes.h +++ b/arch/x86/include/asm/asm-prototypes.h @@ -38,4 +38,7 @@ INDIRECT_THUNK(dx) INDIRECT_THUNK(si) INDIRECT_THUNK(di) INDIRECT_THUNK(bp) +asmlinkage void __fill_rsb(void); +asmlinkage void __clear_rsb(void); + #endif /* CONFIG_RETPOLINE */ |