D18893.diff
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	Index: head/sys/amd64/include/cpufunc.h
	===================================================================
	--- head/sys/amd64/include/cpufunc.h
	+++ head/sys/amd64/include/cpufunc.h
	@@ -627,6 +627,22 @@
	__asm __volatile("mwait" : : "a" (hints), "c" (extensions));
	}

	+static __inline uint32_t
	+rdpkru(void)
	+{
	+ uint32_t res;
	+
	+ __asm __volatile("rdpkru" : "=a" (res) : "c" (0) : "edx");
	+ return (res);
	+}
	+
	+static __inline void
	+wrpkru(uint32_t mask)
	+{
	+
	+ __asm __volatile("wrpkru" : : "a" (mask), "c" (0), "d" (0));
	+}
	+
	#ifdef _KERNEL
	/* This is defined in <machine/specialreg.h> but is too painful to get to */
	#ifndef MSR_FSBASE
	Index: head/sys/i386/include/cpufunc.h
	===================================================================
	--- head/sys/i386/include/cpufunc.h
	+++ head/sys/i386/include/cpufunc.h
	@@ -726,6 +726,22 @@
	write_eflags(eflags);
	}

	+static __inline uint32_t
	+rdpkru(void)
	+{
	+ uint32_t res;
	+
	+ __asm __volatile("rdpkru" : "=a" (res) : "c" (0) : "edx");
	+ return (res);
	+}
	+
	+static __inline void
	+wrpkru(uint32_t mask)
	+{
	+
	+ __asm __volatile("wrpkru" : : "a" (mask), "c" (0), "d" (0));
	+}
	+
	#else /* !(__GNUCLIKE_ASM && __CC_SUPPORTS___INLINE) */

	int breakpoint(void);