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The interrupt code rests on hardware behavior that the code cannot show
on its own: how GIN, the GPU's interrupt controller, records and
delivers interrupts, what edge-triggered delivery requires of a handler,
and how the GSP signals the CPU. Some of those requirements come from
OpenRM rather than from the hardware manuals.
Add a design document that records that behavior, the rules that
nova-core follows because of it, and the terms that the code uses for
it. The code comments cite the document by section rather than repeating
it.
Assisted-by: LLM
Signed-off-by: John Hubbard <jhubbard@nvidia.com>
Acked-by: Danilo Krummrich <dakr@kernel.org>
Link: https://patch.msgid.link/20260930034148.590687-16-jhubbard@nvidia.com
[acourbot: cut the last 3 sections.]
Signed-off-by: Alexandre Courbot <acourbot@nvidia.com>
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