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Subject[PATCH v5 0/4] enable CAAM's HWRNG as default

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!

Andrey Smirnov


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


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