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9769635423
linux/drivers/char/hw_random
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Marco Felsch 9769635423 hwrng: imx-rngc - add quality to use it as kernel entropy pool 
The RNGB can generate 2^20 words (1 word == 4 byte) of 'random' data
after the seed pool was initialized. The pool needs to be reseeded if
more words are required. The reseeding is done automatically since
commit 3acd9ea933 ("hwrng: imx-rngc - use automatic seeding").

We can't retrieve the TRNG values directly so we need a other way to get
the quality level. We know that the PRNG uses 20.000 entropy samples
from the TRNG to generate 2^20 words (1MiB) and the quality level is
defined as (in bits of entropy per 1024 bits of input). So the quality
level can be calculated by:

   20.000 * 1024
   ------------- = ~ 19.5
        2^20

Signed-off-by: Marco Felsch <m.felsch@pengutronix.de>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2020-09-11 14:39:14 +10:00
..
amd-rng.c hwrng: amd - Revert managed API changes 2017-03-16 17:43:10 +08:00
atmel-rng.c hwrng: atmel - add new platform support for sam9x60 2019-11-15 13:44:17 +08:00
ba431-rng.c hwrng: ba431 - Include kernel.h 2020-07-16 21:49:01 +10:00
bcm2835-rng.c hwrng: bcm2835 - Constify bcm2835_rng_devtype[] 2020-07-09 18:25:21 +10:00
cavium-rng-vf.c hwrng: drivers - Use device-managed registration API 2019-08-02 14:44:33 +10:00
cavium-rng.c hwrng: cavium - make two functions static 2018-03-09 22:45:34 +08:00
cctrng.c hwrng: cctrn - Simplify with dev_err_probe() 2020-09-04 17:57:15 +10:00
cctrng.h hwrng: cctrng - introduce Arm CryptoCell driver 2020-04-16 16:49:20 +10:00
core.c hwrng: core - remove redundant initialization of variable ret 2020-07-31 18:25:29 +10:00
exynos-trng.c hwrng: exynos - use devm_platform_ioremap_resource() to simplify code 2019-10-26 02:09:53 +11:00
geode-rng.c hwrng: geode - Revert managed API changes 2017-03-16 17:43:11 +08:00
hisi-rng.c hwrng: hisi - Fix W=1 unused variable warning 2020-07-09 18:25:12 +10:00
hisi-trng-v2.c hwrng: hisi - add HiSilicon TRNG driver support 2019-11-08 23:15:51 +08:00
imx-rngc.c hwrng: imx-rngc - add quality to use it as kernel entropy pool 2020-09-11 14:39:14 +10:00
ingenic-rng.c crypto: ingenic - Add hardware RNG for Ingenic JZ4780 and X1000 2020-07-31 18:25:28 +10:00
intel-rng.c hwrng: intel - cleanup initialization 2020-08-21 14:47:49 +10:00
iproc-rng200.c hwrng: iproc-rng200 - Add support for BCM2711 2019-12-11 16:34:45 +08:00
ixp4xx-rng.c IXP4xx: HW pseudo-random generator is available on IXP45x/46x only. 2012-11-22 03:35:39 +00:00
Kconfig crypto: ingenic - Add hardware RNG for Ingenic JZ4780 and X1000 2020-07-31 18:25:28 +10:00
ks-sa-rng.c hwrng: ks-sa - Replace HTTP links with HTTPS ones 2020-07-16 21:49:06 +10:00
Makefile crypto: ingenic - Add hardware RNG for Ingenic JZ4780 and X1000 2020-07-31 18:25:28 +10:00
meson-rng.c hwrng: meson - use devm_platform_ioremap_resource() to simplify code 2019-10-26 02:09:55 +11:00
mtk-rng.c hwrng: mediatek - Use devm_platform_ioremap_resource() in mtk_rng_probe() 2019-10-05 01:06:18 +10:00
mxc-rnga.c hwrng: mxc-rnga - use devm_platform_ioremap_resource() to simplify code 2019-07-27 21:08:32 +10:00
n2-asm.S License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
n2-drv.c hwrng: n2-drv - fix typo 2019-08-08 12:07:49 +10:00
n2rng.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
nomadik-rng.c hwrng: nomadik - Constify nmk_rng_ids[] 2020-07-09 18:25:21 +10:00
npcm-rng.c hwrng: npcm - Fix W=1 unused variable warning 2020-07-09 18:25:11 +10:00
octeon-rng.c hwrng: octeon - Fix sparse warnings 2020-07-09 18:25:14 +10:00
omap3-rom-rng.c change email address for Pali Rohár 2020-04-10 15:36:22 -07:00
omap-rng.c hwrng: omap - Fix W=1 unused variable warning 2020-07-09 18:25:11 +10:00
optee-rng.c hwrng: optee - fix wait use case 2020-08-21 14:45:28 +10:00
pasemi-rng.c hwrng: pasemi - use devm_platform_ioremap_resource() to simplify code 2019-10-26 02:09:56 +11:00
pic32-rng.c hwrng: pic32 - Fix W=1 unused variable warning 2020-07-09 18:25:13 +10:00
powernv-rng.c hwrng: drivers - Use device-managed registration API 2019-08-02 14:44:33 +10:00
pseries-rng.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 333 2019-06-05 17:37:06 +02:00
s390-trng.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 376 2019-06-05 17:37:10 +02:00
st-rng.c hwrng: st - Fix W=1 unused variable warning 2020-07-09 18:25:12 +10:00
stm32-rng.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 110 2019-05-24 17:39:01 +02:00
timeriomem-rng.c hwrng: timeriomem - relax check on memory resource size 2019-09-05 14:37:30 +10:00
tx4939-rng.c hwrng: tx4939 - use devm_platform_ioremap_resource() to simplify code 2019-10-26 02:09:57 +11:00
via-rng.c hwrng: via_rng: Convert to new X86 CPU match macros 2020-03-24 21:36:26 +01:00
virtio-rng.c hwrng: virtio - Constify id_table[] 2020-07-09 18:25:21 +10:00
xgene-rng.c hwrng: xgene - Delete an error message in xgene_rng_probe() 2020-04-16 16:49:22 +10:00