diff options
Diffstat (limited to 'sys/dev/random/nehemiah.c')
| -rw-r--r-- | sys/dev/random/nehemiah.c | 12 |
1 files changed, 11 insertions, 1 deletions
diff --git a/sys/dev/random/nehemiah.c b/sys/dev/random/nehemiah.c index e34cdfa03ba1..f91e228e1df5 100644 --- a/sys/dev/random/nehemiah.c +++ b/sys/dev/random/nehemiah.c @@ -35,6 +35,8 @@ __FBSDID("$FreeBSD$"); #include <sys/selinfo.h> #include <sys/systm.h> +#include <machine/pcb.h> + #include <dev/random/randomdev.h> #define RANDOM_BLOCK_SIZE 256 @@ -82,6 +84,8 @@ static uint8_t out[RANDOM_BLOCK_SIZE+7] __aligned(16); static union VIA_ACE_CW acw __aligned(16); +static struct fpu_kern_ctx fpu_ctx_save; + static struct mtx random_nehemiah_mtx; /* ARGSUSED */ @@ -142,11 +146,16 @@ random_nehemiah_deinit(void) static int random_nehemiah_read(void *buf, int c) { - int i; + int i, error; size_t count, ret; uint8_t *p; mtx_lock(&random_nehemiah_mtx); + error = fpu_kern_enter(curthread, &fpu_ctx_save, FPU_KERN_NORMAL); + if (error != 0) { + mtx_unlock(&random_nehemiah_mtx); + return (0); + } /* Get a random AES key */ count = 0; @@ -187,6 +196,7 @@ random_nehemiah_read(void *buf, int c) c = MIN(RANDOM_BLOCK_SIZE, c); memcpy(buf, out, (size_t)c); + fpu_kern_leave(curthread, &fpu_ctx_save); mtx_unlock(&random_nehemiah_mtx); return (c); } |