On 5/1/20 12:51 AM, Eric Biggers wrote:
From: Eric Biggers <ebiggers@xxxxxxxxxx> Add support for the Inline Crypto Engine (ICE) key programming interface that's needed for the ufs-qcom driver to use inline encryption on Snapdragon SoCs. This interface consists of two SCM calls: one to program a key into a keyslot, and one to invalidate a keyslot. Although the UFS specification defines a standard way to do this, on these SoCs the Linux kernel isn't permitted to access the needed crypto configuration registers directly; these SCM calls must be used instead. Signed-off-by: Eric Biggers <ebiggers@xxxxxxxxxx> --- drivers/firmware/qcom_scm.c | 101 ++++++++++++++++++++++++++++++++++++ drivers/firmware/qcom_scm.h | 4 ++ include/linux/qcom_scm.h | 19 +++++++ 3 files changed, 124 insertions(+) diff --git a/drivers/firmware/qcom_scm.c b/drivers/firmware/qcom_scm.c index 059bb0fbae9e5b..646f9613393612 100644 --- a/drivers/firmware/qcom_scm.c +++ b/drivers/firmware/qcom_scm.c @@ -926,6 +926,107 @@ int qcom_scm_ocmem_unlock(enum qcom_scm_ocmem_client id, u32 offset, u32 size) } EXPORT_SYMBOL(qcom_scm_ocmem_unlock);+/**+ * qcom_scm_ice_available() - Is the ICE key programming interface available? + * + * Return: true iff the SCM calls wrapped by qcom_scm_ice_invalidate_key() and/s/iff/if
-- Warm Regards Thara
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