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powerpc/pseries: EOI interrupts in XICS by setting lowest priority
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Authored by jhibbits on Sep 30 2018, 2:06 AM.

Details

Summary

Discussing with Benjamin Herrenschmidt, OPAL_INT_GET_XIRR masks the
returned priority, so must be resumed before more interrupts can be
handled at this priority. Since there are only two priorities used in
FreeBSD, we know that the previous priority in an EOI will always be
0xff (lowest priority).

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rS FreeBSD src repository
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Event Timeline

jhibbits created this revision.Sep 30 2018, 2:06 AM
nwhitehorn accepted this revision.Oct 5 2018, 9:41 PM
This revision is now accepted and ready to land.Oct 5 2018, 9:41 PM
This revision was automatically updated to reflect the committed changes.