Basic inline encryption support for ufs-exynos [LWN.net]

From:		Eric Biggers <ebiggers-AT-kernel.org>
To:		linux-scsi-AT-vger.kernel.org
Subject:		[PATCH v3 0/6] Basic inline encryption support for ufs-exynos
Date:		Mon, 08 Jul 2024 16:53:24 -0700
Message-ID:		<20240708235330.103590-1-ebiggers@kernel.org>
Cc:		linux-samsung-soc-AT-vger.kernel.org, linux-fscrypt-AT-vger.kernel.org, Alim Akhtar <alim.akhtar-AT-samsung.com>, Avri Altman <avri.altman-AT-wdc.com>, Bart Van Assche <bvanassche-AT-acm.org>, "Martin K . Petersen" <martin.petersen-AT-oracle.com>, Peter Griffin <peter.griffin-AT-linaro.org>, André Draszik <andre.draszik-AT-linaro.org>, William McVicker <willmcvicker-AT-google.com>
Archive-link:		Article

Add support for Flash Memory Protector (FMP), which is the inline
encryption hardware on Exynos and Exynos-based SoCs.

Specifically, add support for the "traditional FMP mode" that works on
many Exynos-based SoCs including gs101.  This is the mode that uses
"software keys" and is compatible with the upstream kernel's existing
inline encryption framework in the block and filesystem layers.  I plan
to add support for the wrapped key support on gs101 at a later time.

Tested on gs101 (specifically Pixel 6) by running the 'encrypt' group of
xfstests on a filesystem mounted with the 'inlinecrypt' mount option.

This patchset applies to v6.10-rc6, and it has no prerequisites that
aren't already upstream.

Changed in v3:
  - Made the FMP support depend on EXYNOS_UFS_OPT_UFSPR_SECURE, since
    the !EXYNOS_UFS_OPT_UFSPR_SECURE case has not yet been tested
  - Replaced LOG2_DATA_UNIT_SIZE with ilog2(DATA_UNIT_SIZE)
  - Added Reviewed-by tags

Changed in v2:
  - Added DATA_UNIT_SIZE macro
  - Changed a comment into kerneldoc
  - Used ARM_SMCCC_CALL_VAL() to define SMC codes
  - Used arm_smccc_smc() directly instead of via a wrapper function

Eric Biggers (6):
  scsi: ufs: core: Add UFSHCD_QUIRK_CUSTOM_CRYPTO_PROFILE
  scsi: ufs: core: fold ufshcd_clear_keyslot() into its caller
  scsi: ufs: core: Add UFSHCD_QUIRK_BROKEN_CRYPTO_ENABLE
  scsi: ufs: core: Add fill_crypto_prdt variant op
  scsi: ufs: core: Add UFSHCD_QUIRK_KEYS_IN_PRDT
  scsi: ufs: exynos: Add support for Flash Memory Protector (FMP)

 drivers/ufs/core/ufshcd-crypto.c |  34 +++--
 drivers/ufs/core/ufshcd-crypto.h |  36 +++++
 drivers/ufs/core/ufshcd.c        |   3 +-
 drivers/ufs/host/ufs-exynos.c    | 240 ++++++++++++++++++++++++++++++-
 include/ufs/ufshcd.h             |  28 ++++
 5 files changed, 320 insertions(+), 21 deletions(-)


base-commit: 22a40d14b572deb80c0648557f4bd502d7e83826
-- 
2.45.2