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@xxxxxxxxx
[v2] https://lore.kernel.org/lkml/20191118153843.28136-1-andrew.smirnov@xxxxxxxxx
[v3] https://lore.kernel.org/lkml/20191120165341.32669-1-andrew.smirnov@xxxxxxxxx
[v4] https://lore.kernel.org/lkml/20191121155554.1227-1-andrew.smirnov@xxxxxxxxx
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
