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Only crop the VPN on POWER4 and derivatives for TLBIE operations
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Authored by jhibbits on May 26 2018, 12:28 AM.

Details

Summary

PowerISA 2.03 and later require bits 14:65 in the RB register argument,
which is the full value of the vpn argument post-shift. Only POWER4, POWER4+,
and PPC970* need the upper 16 bits cropped.

With this change FreeBSD can boot to multi-user on POWER9.

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Repository
rS FreeBSD src repository
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Event Timeline

jhibbits created this revision.May 26 2018, 12:28 AM
nwhitehorn accepted this revision.May 26 2018, 12:29 AM

On POWER9, I think the lock is unnecessary (the ISA spec doesn't mention it).

This revision is now accepted and ready to land.May 26 2018, 12:29 AM

On POWER9, I think the lock is unnecessary (the ISA spec doesn't mention it).

I can revisit that later. First make it work, then make it fast.

This revision was automatically updated to reflect the committed changes.