kernel/drivers/crypto/stm32/Kconfig, branch linux-rolling-stable

crypto: stm32 - remove crc32 and crc32c support

2025-06-30T16:31:56Z

Remove the crc32 and crc32c support from the stm32 driver. Since it's not wired up to the CRC library, almost no CRC user in the kernel can actually be taking advantage of it, so it's effectively dead code. Support for this hardware could be migrated to the CRC library, but there doesn't seem to be much point. This CRC engine is present only on a couple older SoCs that lacked CRC instructions. Even for those SoCs, it probably wouldn't be worthwhile. This driver has to deal with things like locking and runtime power management that do not exist in software CRC code and are a source of bugs (as is clear from the commit log) and add significant overhead to the processing of short messages, which are common. The patch that added this driver seemed to justify it based purely on a microbenchmark on Cortex-M7 on long messages, not a real use case. These days, if this driver were to be used at all it would likely be on Cortex-A7 instead. This CRC engine is also not supported by QEMU, making the driver not easily testable. Acked-by: Ard Biesheuvel Acked-by: Arnd Bergmann Cc: Alexandre Torgue Cc: Fabien Dessenne Cc: Lionel Debieve Cc: Maxime Coquelin Cc: linux-stm32@st-md-mailman.stormreply.com Link: https://lore.kernel.org/r/20250601193441.6913-1-ebiggers@kernel.org Signed-off-by: Eric Biggers

crypto: stm32 - add new algorithms support

2023-07-22T01:59:38Z

Add the all SHA-2 (up to 512) and SHA-3 algorithm support. Update compatible table to add stm32mp13. Signed-off-by: Thomas Bourgoin Signed-off-by: Herbert Xu

crypto: stm32 - enable drivers to be used on Ux500

2022-12-09T10:45:00Z

The Ux500 cryp and hash drivers are older versions of the hardware managed by the stm32 driver. Instead of trying to improve the Ux500 cryp and hash drivers, start to switch over to the modern and more well-maintained STM32 drivers. Cc: Maxime Coquelin Cc: Alexandre Torgue Acked-by: Lionel Debieve Signed-off-by: Linus Walleij Signed-off-by: Herbert Xu

crypto: stm32/crc32 - Avoid lock if hardware is already used

2020-09-25T07:48:14Z

If STM32 CRC device is already in use, calculate CRC by software. This will release CPU constraint for a concurrent access to the hardware, and avoid masking irqs during the whole block processing. Fixes: 7795c0baf5ac ("crypto: stm32/crc32 - protect from concurrent accesses") Signed-off-by: Nicolas Toromanoff Signed-off-by: Herbert Xu

crypto: Kconfig - Fix indentation

2019-12-11T08:36:05Z

Adjust indentation from spaces to tab (+optional two spaces) as in coding style with command like: $ sed -e 's/^ /\t/' -i */Kconfig Signed-off-by: Krzysztof Kozlowski Reviewed-by: Horia Geantă Signed-off-by: Herbert Xu

crypto: des - split off DES library from generic DES cipher driver

2019-08-22T04:57:33Z

Another one for the cipher museum: split off DES core processing into a separate module so other drivers (mostly for crypto accelerators) can reuse the code without pulling in the generic DES cipher itself. This will also permit the cipher interface to be made private to the crypto API itself once we move the only user in the kernel (CIFS) to this library interface. Signed-off-by: Ard Biesheuvel Signed-off-by: Herbert Xu

treewide: Add SPDX license identifier - Makefile/Kconfig

2019-05-21T08:50:46Z

Add SPDX license identifiers to all Make/Kconfig files which: - Have no license information of any form These files fall under the project license, GPL v2 only. The resulting SPDX license identifier is: GPL-2.0-only Signed-off-by: Thomas Gleixner Signed-off-by: Greg Kroah-Hartman

crypto: stm32/cryp - add weak key check for DES

2019-05-03T06:03:29Z

Add weak key test for des functions calling the generic des_ekey. Signed-off-by: Lionel Debieve Signed-off-by: Herbert Xu

crypto: stm32 - Use standard CONFIG name

2017-12-28T06:56:50Z

All hardware crypto devices have their CONFIG names using the following convention: CRYPTO_DEV_name_algo This patch apply this conventions on STM32 CONFIG names. Signed-off-by: Corentin Labbe Reviewed-by: Fabien Dessenne Signed-off-by: Herbert Xu

crypto: stm32 - Support for STM32 CRYP crypto module

2017-11-29T05:43:42Z

This module registers block cipher algorithms that make use of the STMicroelectronics STM32 crypto "CRYP1" hardware. The following algorithms are supported: - aes: ecb, cbc, ctr - des: ecb, cbc - tdes: ecb, cbc Signed-off-by: Fabien Dessenne Signed-off-by: Herbert Xu