linux-kernel - [PATCH v5 0/4] enable CAAM's HWRNG as default

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Date:   Tue,  3 Dec 2019 08:23:53 -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 v5 0/4] 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

Changes since [v3]:

    - DRNG's .cra_name is now "stdrng"

    - collected Reviewd-by tag from Lucas

    - typo fixes in commit messages of the series

Changes since [v4]:

    - Dropped "crypto: caam - RNG4 TRNG errata" and "crypto: caam -
      enable prediction resistance in HRWNG" to limit the scope of the
      series. Those two patches are not yet ready and can be submitted
      separately later.

    - Collected Tested-by from Chris

Feedback is welcome!

Thanks,
Andrey Smirnov

[discussion] https://patchwork.kernel.org/patch/9850669/
[v1] https://lore.kernel.org/lkml/20191029162916.26579-1-andrew.smirnov@gmail.com
[v2] https://lore.kernel.org/lkml/20191118153843.28136-1-andrew.smirnov@gmail.com
[v3] https://lore.kernel.org/lkml/20191120165341.32669-1-andrew.smirnov@gmail.com
[v4] https://lore.kernel.org/lkml/20191121155554.1227-1-andrew.smirnov@gmail.com

Andrey Smirnov (4):
  crypto: caam - allocate RNG instantiation descriptor with GFP_DMA
  crypto: caam - move RNG presence 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    |  10 +-
 drivers/crypto/caam/drng.c    | 174 +++++++++++++++++
 drivers/crypto/caam/intern.h  |  32 ++-
 drivers/crypto/caam/jr.c      |   3 +-
 drivers/crypto/caam/regs.h    |  11 +-
 drivers/crypto/caam/trng.c    |  89 +++++++++
 9 files changed, 320 insertions(+), 375 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