> The question I have is can I disable the random number generator?s use of
> that instruction? I?d rather be on -current than years old.
Apart from the following hammer, I see no easy way to achieve this.
Index: i386/machdep.c
===================================================================
RCS file: /cvs/src/sys/arch/i386/i386/machdep.c,v
retrieving revision 1.536
diff -u -p -r1.536 machdep.c
--- i386/machdep.c 29 Mar 2014 18:09:29 -0000 1.536
+++ i386/machdep.c 26 Apr 2014 19:13:14 -0000
@@ -1964,7 +1964,8 @@ identifycpu(struct cpu_info *ci)
}
if (ci->ci_flags & CPUF_PRIMARY) {
- if (cpu_ecxfeature & CPUIDECX_RDRAND)
+ if (cpu_ecxfeature & CPUIDECX_RDRAND &&
+ vendor != CPUVENDOR_CYRIX)
has_rdrand = 1;
#ifndef SMALL_KERNEL
if (ci->ci_feature_sefflags & SEFF0EBX_SMAP)
