Jens Wiklander 6749e69c4d optee: add asynchronous notifications ... Adds support for asynchronous notifications from secure world to normal world. This allows a design with a top half and bottom half type of driver where the top half runs in secure interrupt context and a notifications tells normal world to schedule a yielding call to do the bottom half processing. The protocol is defined in optee_msg.h optee_rpc_cmd.h and optee_smc.h. A notification consists of a 32-bit value which normal world can retrieve using a fastcall into secure world. The value OPTEE_SMC_ASYNC_NOTIF_VALUE_DO_BOTTOM_HALF (0) has a special meaning. When this value is sent it means that normal world is supposed to make a yielding call OPTEE_MSG_CMD_DO_BOTTOM_HALF. Notification capability is negotiated while the driver is initialized. If both sides supports these notifications then they are enabled. An interrupt is used to notify the driver that there are asynchronous notifications pending. The maximum needed notification value is communicated at this stage. This allows scaling up when needed. Reviewed-by: Sumit Garg <sumit.garg@linaro.org> Acked-by: Ard Biesheuvel <ardb@kernel.org> Signed-off-by: Jens Wiklander <jens.wiklander@linaro.org>		2021-11-17 14:08:57 +01:00
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amdtee	tee: amdtee: unload TA only when its refcount becomes 0	2021-05-05 13:00:11 +02:00
optee	optee: add asynchronous notifications	2021-11-17 14:08:57 +01:00
Kconfig	tee: fix crypto select	2020-05-28 12:38:00 +02:00
Makefile	tee: add AMD-TEE driver	2020-01-04 13:49:51 +08:00
tee_core.c	tee: export teedev_open() and teedev_close_context()	2021-11-17 14:08:55 +01:00
tee_private.h	tee: don't assign shm id for private shms	2020-02-28 13:37:42 +01:00
tee_shm_pool.c	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 282	2019-06-05 17:36:37 +02:00
tee_shm.c	dma-buf: move dma-buf symbols into the DMA_BUF module namespace	2021-10-25 14:53:08 +02:00