Author: kib Date: Tue Feb 19 19:17:20 2019 New Revision: 344296 URL: https://svnweb.freebsd.org/changeset/base/344296
Log: Provide convenience C wrappers for RDPKRU and WRPKRU instructions. Reviewed by: markj Tested by: pho Sponsored by: The FreeBSD Foundation MFC after: 3 days Differential revision: https://reviews.freebsd.org/D18893 Modified: head/sys/amd64/include/cpufunc.h head/sys/i386/include/cpufunc.h Modified: head/sys/amd64/include/cpufunc.h ============================================================================== --- head/sys/amd64/include/cpufunc.h Tue Feb 19 19:16:28 2019 (r344295) +++ head/sys/amd64/include/cpufunc.h Tue Feb 19 19:17:20 2019 (r344296) @@ -627,6 +627,22 @@ cpu_mwait(u_long extensions, u_int hints) __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 Modified: head/sys/i386/include/cpufunc.h ============================================================================== --- head/sys/i386/include/cpufunc.h Tue Feb 19 19:16:28 2019 (r344295) +++ head/sys/i386/include/cpufunc.h Tue Feb 19 19:17:20 2019 (r344296) @@ -726,6 +726,22 @@ intr_restore(register_t eflags) 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); _______________________________________________ svn-src-head@freebsd.org mailing list https://lists.freebsd.org/mailman/listinfo/svn-src-head To unsubscribe, send any mail to "svn-src-head-unsubscr...@freebsd.org"
