Set PG_G global mapping bit on the trampoline mappings.
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Authored by kib on Apr 12 2018, 8:17 PM.

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alc
markj

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rS332504: Set PG_G global mapping bit on the trampoline ptes.

Summary

They are better treated as global since they are valid in all address spaces, even for PTI. pmap_invalidate_range() must work on global mappings for pti since kernel_pmap invalidations are really same as for non-PTI.

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rS FreeBSD src repository - subversion

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Event Timeline

kib created this revision.Apr 12 2018, 8:17 PM

Herald added a subscriber: imp. · View Herald TranscriptApr 12 2018, 8:17 PM

Harbormaster completed remote builds in B16119: Diff 41414.Apr 12 2018, 8:17 PM

alc accepted this revision.Apr 13 2018, 4:51 AM

This revision is now accepted and ready to land.Apr 13 2018, 4:51 AM

markj accepted this revision.Apr 13 2018, 3:00 PM

Tested with stress2 and a buildworld. No problems seen.

Closed by commit rS332504: Set PG_G global mapping bit on the trampoline ptes. (authored by kib). · Explain WhyApr 14 2018, 5:33 PM

This revision was automatically updated to reflect the committed changes.

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head/

sys/

amd64/

pmap.c

2 lines

Diff 41466

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head/sys/amd64/amd64/pmap.c

Set PG_G global mapping bit on the trampoline mappings.ClosedPublicActions