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| author | Eric Biggers <ebiggers@google.com> | 2024-07-09 01:53:29 +0200 |
|---|---|---|
| committer | Martin K. Petersen <martin.petersen@oracle.com> | 2024-07-11 04:32:30 +0200 |
| commit | 4c45dba50a3750a0834353c4187e7896b158bc0c (patch) | |
| tree | 4155b7b267dccc57450440736128b1ba207a2b1e /include/ufs | |
| parent | scsi: ufs: core: Add fill_crypto_prdt variant op (diff) | |
| download | linux-4c45dba50a3750a0834353c4187e7896b158bc0c.tar.xz linux-4c45dba50a3750a0834353c4187e7896b158bc0c.zip | |
scsi: ufs: core: Add UFSHCD_QUIRK_KEYS_IN_PRDT
Since the nonstandard inline encryption support on Exynos SoCs requires
that raw cryptographic keys be copied into the PRDT, it is desirable to
zeroize those keys after each request to keep them from being left in
memory. Therefore, add a quirk bit that enables the zeroization.
We could instead do the zeroization unconditionally. However, using a
quirk bit avoids adding the zeroization overhead to standard devices.
Reviewed-by: Bart Van Assche <bvanassche@acm.org>
Reviewed-by: Peter Griffin <peter.griffin@linaro.org>
Signed-off-by: Eric Biggers <ebiggers@google.com>
Link: https://lore.kernel.org/r/20240708235330.103590-6-ebiggers@kernel.org
Reviewed-by: Alim Akhtar <alim.akhtar@samsung.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Diffstat (limited to 'include/ufs')
| -rw-r--r-- | include/ufs/ufshcd.h | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/include/ufs/ufshcd.h b/include/ufs/ufshcd.h index fb791d1a6d00..80accfbe48aa 100644 --- a/include/ufs/ufshcd.h +++ b/include/ufs/ufshcd.h @@ -665,6 +665,14 @@ enum ufshcd_quirks { * host controller initialization fails if that bit is set. */ UFSHCD_QUIRK_BROKEN_CRYPTO_ENABLE = 1 << 23, + + /* + * This quirk needs to be enabled if the host controller driver copies + * cryptographic keys into the PRDT in order to send them to hardware, + * and therefore the PRDT should be zeroized after each request (as per + * the standard best practice for managing keys). + */ + UFSHCD_QUIRK_KEYS_IN_PRDT = 1 << 24, }; enum ufshcd_caps { |