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Make the FF-A bus on its own as a distinct module initialized at
subsys_initcall level when builtin.
Keep the FF-A driver core stack, together with any configured transport,
in a different module initialized as module_init level.
FF-A drivers initialization is now changed to module_init level.
Acked-by: Sebastian Ene <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Sudeep Holla <[email protected]>
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There are requests to keep the transport separate in order to allow
other possible transports like virtio. So let us keep the SMCCC transport
specific routines abstracted.
It is kept simple for now. Once we add another transport, we can develop
better abstraction.
Link: https://lore.kernel.org/r/[email protected]
Tested-by: Jens Wiklander <[email protected]>
Reviewed-by: Jens Wiklander <[email protected]>
Signed-off-by: Sudeep Holla <[email protected]>
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This just add a basic driver that sets up the transport(e.g. SMCCC),
checks the FFA version implemented, get the partition ID for self and
sets up the Tx/Rx buffers for communication.
Link: https://lore.kernel.org/r/[email protected]
Tested-by: Jens Wiklander <[email protected]>
Signed-off-by: Sudeep Holla <[email protected]>
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The Arm FF for Armv8-A specification has concept of endpoints or
partitions. In the Normal world, a partition could be a VM when
the Virtualization extension is enabled or the kernel itself.
In order to handle multiple partitions, we can create a FFA device for
each such partition on a dedicated FFA bus. Similarly, different drivers
requiring FFA transport can be registered on the same bus. We can match
the device and drivers using UUID. This is mostly for the in-kernel
users with FFA drivers.
Link: https://lore.kernel.org/r/[email protected]
Tested-by: Jens Wiklander <[email protected]>
Signed-off-by: Sudeep Holla <[email protected]>
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