Hello, Is there a way that the document mentioned here could be published: https://github.com/open-power/hostboot/blob/master/src/usr/intr/intrrp.H#L307 We faced some deadlock during porting coreboot to POWER9. Possibly, we lack some interrupt handling [1]. [1] https://lists.ozlabs.org/pipermail/openpower-firmware/2021-August/000651.html