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Draft: panfrost: Add a get_device_reset_status() implementation to the CSF backend

Boris Brezillon requested to merge bbrezillon/mesa:panfrost-reset-query into main

What does this MR do and why?

Panthor can report the group state, so let's provide a get_device_reset_status() querying this state and turning it into a pipe_reset_status status.

We also take this as an opportunity to add a fault-injection mechanism, so we can easily test the context recovery mechanism we have in the CSF backend.

Kernel changes are available here.

/cc @kusma @ericsmith

Edited by Boris Brezillon

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