diff options
Diffstat (limited to 'sys/dev/random/ivy.c')
| -rw-r--r-- | sys/dev/random/ivy.c | 41 |
1 files changed, 36 insertions, 5 deletions
diff --git a/sys/dev/random/ivy.c b/sys/dev/random/ivy.c index f81c148..0b8da12 100644 --- a/sys/dev/random/ivy.c +++ b/sys/dev/random/ivy.c @@ -28,16 +28,19 @@ #include <sys/cdefs.h> __FBSDID("$FreeBSD$"); -#include "opt_cpu.h" - -#ifdef RDRAND_RNG - #include <sys/param.h> #include <sys/time.h> +#include <sys/kernel.h> #include <sys/lock.h> +#include <sys/module.h> #include <sys/mutex.h> #include <sys/selinfo.h> #include <sys/systm.h> + +#include <machine/md_var.h> +#include <machine/specialreg.h> + +#include <dev/random/random_adaptors.h> #include <dev/random/randomdev.h> #define RETRY_COUNT 10 @@ -46,7 +49,7 @@ static void random_ivy_init(void); static void random_ivy_deinit(void); static int random_ivy_read(void *, int); -struct random_systat random_ivy = { +struct random_adaptor random_ivy = { .ident = "Hardware, Intel IvyBridge+ RNG", .init = random_ivy_init, .deinit = random_ivy_deinit, @@ -114,4 +117,32 @@ random_ivy_read(void *buf, int c) return (c - count); } +static int +rdrand_modevent(module_t mod, int type, void *unused) +{ + + switch (type) { + case MOD_LOAD: + if (cpu_feature2 & CPUID2_RDRAND) { + random_adaptor_register("rdrand", &random_ivy); + EVENTHANDLER_INVOKE(random_adaptor_attach, &random_ivy); + return (0); + } else { +#ifndef KLD_MODULE + if (bootverbose) #endif + printf( + "%s: RDRAND feature is not present on this CPU\n", + random_ivy.ident); +#ifdef KLD_MODULE + return (ENXIO); +#else + return (0); +#endif + } + } + + return (EINVAL); +} + +RANDOM_ADAPTOR_MODULE(random_rdrand, rdrand_modevent, 1); |
