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authorBorislav Petkov <bp@alien8.de>2018-01-27 16:24:33 +0000
committerThomas Gleixner <tglx@linutronix.de>2018-01-27 19:10:45 +0100
commit1dde7415e99933bb7293d6b2843752cbdb43ec11 (patch)
treed78520e6c433ab33c8edd45746895b9be08855b7 /arch/x86/lib/Makefile
parent2961298efe1ea1b6fc0d7ee8b76018fa6c0bcef2 (diff)
downloadlinux-1dde7415e99933bb7293d6b2843752cbdb43ec11.tar.bz2
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/lib/Makefile')
-rw-r--r--arch/x86/lib/Makefile1
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/x86/lib/Makefile b/arch/x86/lib/Makefile
index d435c89875c1..d0a3170e6804 100644
--- a/arch/x86/lib/Makefile
+++ b/arch/x86/lib/Makefile
@@ -27,6 +27,7 @@ lib-$(CONFIG_RWSEM_XCHGADD_ALGORITHM) += rwsem.o
lib-$(CONFIG_INSTRUCTION_DECODER) += insn.o inat.o
lib-$(CONFIG_RANDOMIZE_BASE) += kaslr.o
lib-$(CONFIG_RETPOLINE) += retpoline.o
+OBJECT_FILES_NON_STANDARD_retpoline.o :=y
obj-y += msr.o msr-reg.o msr-reg-export.o hweight.o