finding out the boot cpu number from userspace

[Arjan van de Ven]

Hi,

assuming cpu 0 is the boot cpu sounds fragile/incorrect, but for irqbalanced
I'd like to find out which cpu is the boot cpu, is there a good way of doing
so ?

The reason for needing this is that some firmware only likes running on the
boot cpu so I need to bind firmware-related irq's to that cpu ideally.

Greetings,
    Arjan van de Ven

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