Re: [PATCH 2/2] hwrng: exynos - Set the quality value

[Stephan Mueller]

Am Donnerstag, 14. Mai 2020, 21:07:34 CEST schrieb Łukasz Stelmach:

Hi Łukasz,

> The value has been estimaded by obtainig 1024 chunks of data 128 bytes
> (1024 bits) each from the generator and finding chunk with minimal
> entropy using the ent(1) tool. The value was 6.332937 bits of entropy
> in each 8 bits of data.

Dto - see the other comment.

Ciao
Stephan

[PATCH 2/2] hwrng: exynos - Set the quality value

[Łukasz Stelmach]

The value has been estimaded by obtainig 1024 chunks of data 128 bytes
(1024 bits) each from the generator and finding chunk with minimal
entropy using the ent(1) tool. The value was 6.332937 bits of entropy
in each 8 bits of data.

Signed-off-by: Łukasz Stelmach 
---
 drivers/char/hw_random/exynos-trng.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/char/hw_random/exynos-trng.c 
b/drivers/char/hw_random/exynos-trng.c
index 8e1fe3f8dd2d..ff6739272bf5 100644
--- a/drivers/char/hw_random/exynos-trng.c
+++ b/drivers/char/hw_random/exynos-trng.c
@@ -123,6 +123,7 @@ static int exynos_trng_probe(struct platform_device *pdev)
trng->rng.init = exynos_trng_init;
trng->rng.read = exynos_trng_do_read;
trng->rng.priv = (unsigned long) trng;
+   trng->rng.quality = 800;
 
platform_set_drvdata(pdev, trng);
trng->dev = >dev;
-- 
2.25.0