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From: <security@xenproject.org>
Subject: x86/alternative: introduce alternative_2
It's based on alternative_io_2 without inputs or outputs but with an
added memory clobber.
This is part of XSA-321.
Acked-by: Jan Beulich <jbeulich@suse.com>
--- a/xen/include/asm-x86/alternative.h
+++ b/xen/include/asm-x86/alternative.h
@@ -114,6 +114,11 @@ extern void alternative_branches(void);
#define alternative(oldinstr, newinstr, feature) \
asm volatile (ALTERNATIVE(oldinstr, newinstr, feature) : : : "memory")
+#define alternative_2(oldinstr, newinstr1, feature1, newinstr2, feature2) \
+ asm volatile (ALTERNATIVE_2(oldinstr, newinstr1, feature1, \
+ newinstr2, feature2) \
+ : : : "memory")
+
/*
* Alternative inline assembly with input.
*
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