On Thu, Nov 12, 2020 at 11:40:03AM -0800, Eric Biggers wrote: > Hello, > > This patchset adds support for eMMC inline encryption, as specified by > the upcoming version of the eMMC specification and as already > implemented and used on many devices. Building on that, it then adds > Qualcomm ICE support and wires it up for the Snapdragon 630 SoC. > > Inline encryption hardware improves the performance of storage > encryption and reduces power usage. See > Documentation/block/inline-encryption.rst for more information about > inline encryption and the blk-crypto framework (upstreamed in v5.8) > which supports it. Most mobile devices already use UFS or eMMC inline > encryption hardware; UFS support was already upstreamed in v5.9. > > Patches 1-3 add support for the standard eMMC inline encryption. > > However, as with UFS, host controller-specific patches are needed on top > of the standard support. Therefore, patches 4-8 add Qualcomm ICE > (Inline Crypto Engine) support and wire it up on the Snapdragon 630 SoC. > > To test this I took advantage of the recently upstreamed support for the > Snapdragon 630 SoC, plus work-in-progress patches from the SoMainline > project (https://github.com/SoMainline/linux/tree/konrad/v5.10-rc3). In > particular, I was able to run the fscrypt xfstests for ext4 and f2fs in > a Debian chroot. Among other things, these tests verified that the > correct ciphertext is written to disk (the same as software encryption). > > It will also be possible to add support for Mediatek eMMC inline > encryption hardware in mtk-sd, and it should be easier than the Qualcomm > hardware since the Mediatek hardware follows the standard more closely. > I.e., patches 1-3 should be almost enough for the Mediatek hardware. > However, I don't have the hardware to do this yet. > > This patchset is based on v5.10-rc3, and it can also be retrieved from > tag "mmc-crypto-v1" of > https://git.kernel.org/pub/scm/linux/kernel/git/ebiggers/linux.git > > Note: the fscrypt inline encryption support is partially broken in > v5.10-rc3, so for testing a fscrypt fix needs to be applied too: > https://lkml.kernel.org/r/20201111015224.303073-1-ebiggers@xxxxxxxxxx > > Eric Biggers (8): > mmc: add basic support for inline encryption > mmc: cqhci: rename cqhci.c to cqhci-core.c > mmc: cqhci: add support for inline encryption > mmc: cqhci: add cqhci_host_ops::program_key > firmware: qcom_scm: update comment for ICE-related functions > dt-bindings: mmc: sdhci-msm: add ICE registers and clock > arm64: dts: qcom: sdm630: add ICE registers and clocks > mmc: sdhci-msm: add Inline Crypto Engine support Any comments on this patchset? - Eric
