[amdkfd] where are AQL packets processed after writing the userspace doorbell

[Smith John]

Hi! I noticed that the AQL packets are more concise compared with PM4
packets. It seemed that AQL packets need more post-processing than PM4
packets.
I was wondering where the AQL packets are processed, such like calculating
the code address using code_entry_offset, resetting packets' headers into
INVALID, and writing values to the completion signal when finished.
Are all these operations done by the firmware?
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