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On some systems the SCMI platform to agent(p2a) communication can be fully interrupt driven. The notification(p2a) channel needs completion interrupt to drive its notification queue at the platform. Without it, the platform notification will not work as the platform will wait for agent indication of clearing the channel via interrupt unlike few platforms which can poll instead. To support such systems, an optional unidirectional mailbox channel for p2a reply communication. If the platform sets channel INTR flag set indicating that it expects the agent to trigger the interrupt to acknowledge the reciept of the notification or any p2a message, and the completion interrupt channel is provided, send a mailbox message to the platform after the p2a message is read and channel is freed to accept new notifications or p2a messages. Signed-off-by: Peng Fan <peng.fan@nxp.com> Link: https://lore.kernel.org/r/20240510-scmi-notify-v2-2-e994cf14ef86@nxp.com Reviewed-by: Cristian Marussi <cristian.marussi@arm.com> Signed-off-by: Sudeep Holla <sudeep.holla@arm.com> |
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Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the reStructuredText markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.