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hw/misc/exynos4210_rng: Use qemu_guest_getrandom

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The random number is intended for use by the guest.  As such, we should
honor the -seed argument for reproducibility.

Reviewed-by: Laurent Vivier <lvivier@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
This commit is contained in:
Richard Henderson
2019-05-22 12:38:54 -04:00
parent 3090c980ed
commit e8196d2111
1 changed files with 4 additions and 7 deletions
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hw/misc/exynos4210_rng.c
+4 -7
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@@ -18,10 +18,10 @@
*/
#include "qemu/osdep.h"
#include "crypto/random.h"
#include "hw/sysbus.h"
#include "qapi/error.h"
#include "qemu/log.h"
#include "qemu/guest-random.h"
#define DEBUG_EXYNOS_RNG 0
@@ -109,7 +109,6 @@ static void exynos4210_rng_set_seed(Exynos4210RngState *s, unsigned int i,
static void exynos4210_rng_run_engine(Exynos4210RngState *s)
{
Error *err = NULL;
int ret;
/* Seed set? */
if ((s->reg_status & EXYNOS4210_RNG_STATUS_SEED_SETTING_DONE) == 0) {
@@ -127,13 +126,11 @@ static void exynos4210_rng_run_engine(Exynos4210RngState *s)
}
/* Get randoms */
ret = qcrypto_random_bytes((uint8_t *)s->randr_value,
sizeof(s->randr_value), &err);
if (!ret) {
if (qemu_guest_getrandom(s->randr_value, sizeof(s->randr_value), &err)) {
error_report_err(err);
} else {
/* Notify that PRNG is ready */
s->reg_status |= EXYNOS4210_RNG_STATUS_PRNG_DONE;
} else {
error_report_err(err);
}
out: