RE: [PATCH v3 5/6] scsi: ufs: core: Add UFSHCD_QUIRK_KEYS_IN_PRDT

["Alim Akhtar" <alim.akhtar@samsung.com>]

> -----Original Message-----
> From: Eric Biggers <ebiggers@kernel.org>
> Sent: Tuesday, July 9, 2024 5:23 AM
> To: linux-scsi@vger.kernel.org
> Cc: linux-samsung-soc@vger.kernel.org; linux-fscrypt@vger.kernel.org; Alim
> Akhtar <alim.akhtar@samsung.com>; Avri Altman <avri.altman@wdc.com>;
> Bart Van Assche <bvanassche@acm.org>; Martin K . Petersen
> <martin.petersen@oracle.com>; Peter Griffin <peter.griffin@linaro.org>;
> André Draszik <andre.draszik@linaro.org>; William McVicker
> <willmcvicker@google.com>
> Subject: [PATCH v3 5/6] scsi: ufs: core: Add UFSHCD_QUIRK_KEYS_IN_PRDT
> 
> From: Eric Biggers <ebiggers@google.com>
> 
> 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>
> ---
Reviewed-by: Alim Akhtar <alim.akhtar@samsung.com>