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From: Konstantin Belousov <kib@FreeBSD.org>
Date: Mon, 21 Aug 2017 09:04:43 +0000 (UTC)
To: src-committers@freebsd.org, svn-src-all@freebsd.org,
 svn-src-stable@freebsd.org, svn-src-stable-11@freebsd.org
Subject: svn commit: r322742 - stable/11/sys/amd64/include
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Author: kib
Date: Mon Aug 21 09:04:43 2017
New Revision: 322742
URL: https://svnweb.freebsd.org/changeset/base/322742

Log:
  MFC r322495:
  Add {rd,wr}{fs,gs}base C wrappers for instructions.

Modified:
  stable/11/sys/amd64/include/cpufunc.h
Directory Properties:
  stable/11/   (props changed)

Modified: stable/11/sys/amd64/include/cpufunc.h
==============================================================================
--- stable/11/sys/amd64/include/cpufunc.h	Mon Aug 21 09:03:20 2017	(r322741)
+++ stable/11/sys/amd64/include/cpufunc.h	Mon Aug 21 09:04:43 2017	(r322742)
@@ -651,6 +651,38 @@ load_gs(u_short sel)
 }
 #endif
 
+static __inline uint64_t
+rdfsbase(void)
+{
+	uint64_t x;
+
+	__asm __volatile("rdfsbase %0" : "=r" (x));
+	return (x);
+}
+
+static __inline void
+wrfsbase(uint64_t x)
+{
+
+	__asm __volatile("wrfsbase %0" : : "r" (x));
+}
+
+static __inline uint64_t
+rdgsbase(void)
+{
+	uint64_t x;
+
+	__asm __volatile("rdgsbase %0" : "=r" (x));
+	return (x);
+}
+
+static __inline void
+wrgsbase(uint64_t x)
+{
+
+	__asm __volatile("wrgsbase %0" : : "r" (x));
+}
+
 static __inline void
 bare_lgdt(struct region_descriptor *addr)
 {