Messages in this thread | | | From | Björn Töpel <> | Subject | Re: [PATCH v12 00/25] Linux RISC-V AIA Support | Date | Wed, 07 Feb 2024 13:55:39 +0100 |
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Björn Töpel <bjorn@kernel.org> writes:
>>> Hmm, seems like we're talking past each other, or at least I get the >>> feeling I can't get my opinions out right. I'll try to do a quick PoC, >>> to show you what I mean. That's probably easier than just talking about >>> it. ...and maybe I'll come realizing I'm all wrong! >> >> I suggest to wait for my v13 and try something on top of that >> otherwise we might duplicate efforts. > > OK!
I did some really rough code sketching, and I'm confident that you can get rid of all ids_enabled_bitmap, hwirqs_used_bitmap, and the corresponding functions/locks. I'd say one lock is enough, and the key is having the per-cpu imsic_local_priv.vectors change from struct imsic_vector * to struct imsic_vector **.
Using smp_call_function_single() to IPI enable (and disable if you don't want to use the lazy timer disable mechanism) seems feasible as well!
(Let me know if you don't have the spare cycles, and I can help out.)
Björn
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