Differential D38944

Allow forcing non-posted memory on arm64
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Authored by andrew on Mar 7 2023, 2:48 PM.

Details

Reviewers

manu

Group Reviewers

arm64

Commits

rGf7acb7ed41f2: Allow forcing non-posted memory on arm64

Summary

To allow for debugging after changing the arm64 VM_MEMATTR_DEVICE
memory type add a new set of tunables to tell the kernel to use
non-posted memory.

This adds the following tunables:

kern.force_nonposted: When set to non-zero the kernel will use non-posted memory for all device allocations.
hint.<dev>.<unit>.force_nonposted: As above, however only forces non-posted memory on the named device.

Diff Detail

Repository

rG FreeBSD src repository

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Lint Not Applicable

Unit

Tests Not Applicable

Event Timeline

andrew created this revision.Mar 7 2023, 2:48 PM

Herald added a reviewer: manu. · View Herald TranscriptMar 7 2023, 2:48 PM

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

andrew requested review of this revision.Mar 7 2023, 2:48 PM

Harbormaster completed remote builds in B50187: Diff 118453.Mar 7 2023, 2:48 PM

andrew added a child revision: D38945: Switch the arm64 VM_MEMATTR_DEVICE to nGnRE.Mar 7 2023, 2:48 PM

This revision was not accepted when it landed; it landed in state Needs Review.Mar 16 2023, 4:46 PM

Closed by commit rGf7acb7ed41f2: Allow forcing non-posted memory on arm64 (authored by andrew). · Explain Why

This revision was automatically updated to reflect the committed changes.

andrew added a commit: rGf7acb7ed41f2: Allow forcing non-posted memory on arm64.

Revision Contents
Changeset List

Path

Size

sys/

arm64/

nexus.c

14 lines

Diff 118931

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Allow forcing non-posted memory on arm64ClosedPublicActions