Disable superpage use for stage 2 arm64 mappings
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Authored by andrew on Nov 7 2022, 11:32 AM.

Details

Reviewers

alc
markj
kib
manu

Group Reviewers

arm64

Commits

rG339990879cf4: Disable superpage use for stage 2 arm64 mappings
rG0b976be033c2: Disable superpage use for stage 2 arm64 mappings

Summary

When modifying a stage 2 mapping we may need to call into the
hypervisor to invalidate the TLB. Until it is known if the cost of
this operation is less than the performance gains superpages offers
disable their use.

Sponsored by: Innovate UK
Sponsored by: The FreeBSD Foundation

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Repository

rG FreeBSD src repository

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Tests Not Applicable

Event Timeline

andrew created this revision.Nov 7 2022, 11:32 AM

Herald added a reviewer: manu. · View Herald TranscriptNov 7 2022, 11:32 AM

Herald added subscribers: emaste, imp. · View Herald Transcript

andrew requested review of this revision.Nov 7 2022, 11:32 AM

Harbormaster completed remote builds in B48204: Diff 112720.Nov 7 2022, 11:32 AM

andrew mentioned this in D37254: Support arm64 stage2 TLB invalidation.Nov 7 2022, 4:20 PM

kib accepted this revision.Nov 8 2022, 10:14 PM

This revision is now accepted and ready to land.Nov 8 2022, 10:14 PM

markj accepted this revision.Nov 14 2022, 4:41 PM

Closed by commit rG0b976be033c2: Disable superpage use for stage 2 arm64 mappings (authored by andrew). · Explain WhyNov 15 2022, 12:39 PM

This revision was automatically updated to reflect the committed changes.

andrew added a commit: rG0b976be033c2: Disable superpage use for stage 2 arm64 mappings.

andrew added a commit: rG339990879cf4: Disable superpage use for stage 2 arm64 mappings.Jan 23 2023, 12:38 PM

Revision Contents
Changeset List

Path

Size

sys/

arm64/

pmap.c

9 lines

Diff 113138

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Disable superpage use for stage 2 arm64 mappingsClosedPublicActions