diff options
Diffstat (limited to 'sys/arch/amd64/include/cpufunc.h')
| -rw-r--r-- | sys/arch/amd64/include/cpufunc.h | 12 |
1 files changed, 11 insertions, 1 deletions
diff --git a/sys/arch/amd64/include/cpufunc.h b/sys/arch/amd64/include/cpufunc.h index 23f1d51d6b9..b5eeacaec53 100644 --- a/sys/arch/amd64/include/cpufunc.h +++ b/sys/arch/amd64/include/cpufunc.h @@ -1,4 +1,4 @@ -/* $OpenBSD: cpufunc.h,v 1.11 2014/03/29 18:09:28 guenther Exp $ */ +/* $OpenBSD: cpufunc.h,v 1.12 2015/03/21 20:42:38 kettenis Exp $ */ /* $NetBSD: cpufunc.h,v 1.3 2003/05/08 10:27:43 fvdl Exp $ */ /*- @@ -309,6 +309,16 @@ mwait(u_long extensions, u_int hints) __asm volatile("mwait" : : "a" (hints), "c" (extensions)); } +static __inline void +xsetbv(uint32_t reg, uint64_t mask) +{ + uint32_t lo, hi; + + lo = mask; + hi = mask >> 32; + __asm volatile("xsetbv" :: "c" (reg), "a" (lo), "d" (hi) : "memory"); +} + /* Break into DDB/KGDB. */ static __inline void breakpoint(void) |