On 2023-08-03 16:33, Ard Biesheuvel wrote:
On Wed, 26 Jul 2023 at 20:45, Kun Qin <kuqi...@gmail.com> wrote:
Hi Ard,
Our current use case is around AP core suspension and wake-ups.
The program can suspend the secondary cores through PSCI interfaces
(after powering
them on). BSP can then wake up the suspended cores through SGI on demand.
The use of PSCI is already dubious in the context of UEFI - combining
it with the use of SGIs for communication between cores seems like a
slippery slope I don't think we should be going down.
Well, UEFI has no concept of multiple cores, so I don't think there's
anything fishy about using PSCI to bring up/down APs. But I agree adding
interrupt support, not considered by either UEFI nor PI, feels off.
What is the fundamental use-case? (Pre-)silicon testing?
/
Leif
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