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SubjectRe: [PATCH v5 1/1] x86/acpi, x86/boot: Add multiprocessor wake-up support
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On 5/23/21 11:40 PM, Mika Penttilä wrote:
>
> So this isn't supporting suspend/resume if AP cannot started again?

Yes. You are correct. It can be used only once per AP. Please find the
spec reference below.

/*
* According to the ACPI specification r6.4, sec 5.2.12.19, the
* mailbox-based wakeup mechanism cannot be used more than once
* for the same CPU, so skip sending wake commands to already
* awake CPU.
*/

--
Sathyanarayanan Kuppuswamy
Linux Kernel Developer

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