linux-kernel - [PATCH v3 0/6] enable CAAM's HWRNG as default

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Date:   Wed, 20 Nov 2019 08:53:35 -0800
From:   Andrey Smirnov <andrew.smirnov@...il.com>
To:     linux-crypto@...r.kernel.org
Cc:     Andrey Smirnov <andrew.smirnov@...il.com>,
        Chris Healy <cphealy@...il.com>,
        Lucas Stach <l.stach@...gutronix.de>,
        Horia Geantă <horia.geanta@....com>,
        Herbert Xu <herbert@...dor.apana.org.au>,
        Iuliana Prodan <iuliana.prodan@....com>,
        linux-kernel@...r.kernel.org, linux-imx@....com
Subject: [PATCH v3 0/6] enable CAAM's HWRNG as default

Everyone:

This series is a continuation of original [discussion]. I don't know
if what's in the series is enough to use CAAMs HWRNG system wide, but
I am hoping that with enough iterations and feedback it will be.


Changes since [v1]:

    - Original hw_random replaced with the one using output of TRNG directly

    - SEC4 DRNG IP block exposed via crypto API

    - Small fix regarding use of GFP_DMA added to the series

Chagnes since [v2]:

    - msleep in polling loop to avoid wasting CPU cycles

    - caam_trng_read() bails out early if 'wait' is set to 'false'

    - fixed typo in ZII's name

Feedback is welcome!

Thanks,
Andrey Smirnov

[discussion] https://patchwork.kernel.org/patch/9850669/
[v1] lore.kernel.org/lkml/20191029162916.26579-1-andrew.smirnov@...il.com
[v2] lore.kernel.org/lkml/20191118153843.28136-1-andrew.smirnov@...il.com

Andrey Smirnov (6):
  crypto: caam - RNG4 TRNG errata
  crypto: caam - enable prediction resistance in HRWNG
  crypto: caam - allocate RNG instantiation descriptor with GFP_DMA
  crypto: caam - move RNG presense check into a shared function
  crypto: caam - replace DRNG with TRNG for use with hw_random
  crypto: caam - expose SEC4 DRNG via crypto RNG API

 drivers/crypto/caam/Kconfig   |  15 +-
 drivers/crypto/caam/Makefile  |   3 +-
 drivers/crypto/caam/caamrng.c | 358 ----------------------------------
 drivers/crypto/caam/ctrl.c    |  29 ++-
 drivers/crypto/caam/desc.h    |   2 +
 drivers/crypto/caam/drng.c    | 175 +++++++++++++++++
 drivers/crypto/caam/intern.h  |  32 ++-
 drivers/crypto/caam/jr.c      |   3 +-
 drivers/crypto/caam/regs.h    |  14 +-
 drivers/crypto/caam/trng.c    |  89 +++++++++
 10 files changed, 338 insertions(+), 382 deletions(-)
 delete mode 100644 drivers/crypto/caam/caamrng.c
 create mode 100644 drivers/crypto/caam/drng.c
 create mode 100644 drivers/crypto/caam/trng.c

-- 
2.21.0