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authorEric Biggers <ebiggers@google.com>2021-01-26 03:14:48 +0300
committerUlf Hansson <ulf.hansson@linaro.org>2021-02-01 14:02:33 +0300
commit93f1c150cb0d043e1e8985db7824b4e2e1ac653f (patch)
tree5c999fb86e72da2a2a12b871c122588ff5907598 /drivers/mmc/core/Kconfig
parentd76d9d7d1009968dd3a0fc30e5f5ee9fbffc1350 (diff)
downloadlinux-93f1c150cb0d043e1e8985db7824b4e2e1ac653f.tar.xz
mmc: core: Add basic support for inline encryption
In preparation for adding CQHCI crypto engine (inline encryption) support, add the code required to make mmc_core and mmc_block aware of inline encryption. Specifically: - Add a capability flag MMC_CAP2_CRYPTO to struct mmc_host. Drivers will set this if the host and driver support inline encryption. - Embed a blk_keyslot_manager in struct mmc_host. Drivers will initialize this (as a device-managed resource) if the host and driver support inline encryption. mmc_block registers this keyslot manager with the request_queue of any MMC card attached to the host. - Make mmc_block copy the crypto keyslot and crypto data unit number from struct request to struct mmc_request, so that drivers will have access to them. - If the MMC host is reset, reprogram all the keyslots to ensure that the software state stays in sync with the hardware state. Co-developed-by: Satya Tangirala <satyat@google.com> Signed-off-by: Satya Tangirala <satyat@google.com> Acked-by: Adrian Hunter <adrian.hunter@intel.com> Reviewed-by: Satya Tangirala <satyat@google.com> Reviewed-and-tested-by: Peng Zhou <peng.zhou@mediatek.com> Signed-off-by: Eric Biggers <ebiggers@google.com> Link: https://lore.kernel.org/r/20210126001456.382989-2-ebiggers@kernel.org Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Diffstat (limited to 'drivers/mmc/core/Kconfig')
-rw-r--r--drivers/mmc/core/Kconfig8
1 files changed, 8 insertions, 0 deletions
diff --git a/drivers/mmc/core/Kconfig b/drivers/mmc/core/Kconfig
index c12fe13e4b14..ae8b69aee619 100644
--- a/drivers/mmc/core/Kconfig
+++ b/drivers/mmc/core/Kconfig
@@ -81,3 +81,11 @@ config MMC_TEST
This driver is only of interest to those developing or
testing a host driver. Most people should say N here.
+config MMC_CRYPTO
+ bool "MMC Crypto Engine Support"
+ depends on BLK_INLINE_ENCRYPTION
+ help
+ Enable Crypto Engine Support in MMC.
+ Enabling this makes it possible for the kernel to use the crypto
+ capabilities of the MMC device (if present) to perform crypto
+ operations on data being transferred to/from the device.