Page MenuHomeFreeBSD
Differential D35613

Allow the kernel to emulate the physical counter on arm64
ClosedPublic
Actions

Authored by andrew on Jun 27 2022, 3:48 PM.
Tags
None
Referenced Files
Unknown Object (File)
Thu, Aug 13, 6:22 PM
Unknown Object (File)
Thu, Aug 13, 6:21 PM
Unknown Object (File)
Thu, Aug 13, 5:55 PM
Unknown Object (File)
Wed, Aug 12, 6:39 AM
Unknown Object (File)
Tue, Aug 11, 8:07 AM
Unknown Object (File)
Mon, Aug 10, 11:43 PM
Unknown Object (File)
Sat, Jul 25, 10:50 PM
Unknown Object (File)
Fri, Jul 24, 5:07 PM
View All 90 Files
Subscribers
imp

Details

Reviewers
kib
markj
Group Reviewers
arm64
Commits
rG278111b8a541: Allow the kernel to emulate the physical counter on arm64
Summary

When running under a VM we don't have access to the physical counter.
Add support to emulate this instruction by handling the trap in the
kernel. As it is slow only enable when the hw.emulate_phys_counter
tunable is set on boot.

Diff Detail

Repository
rS FreeBSD src repository - subversion
Lint
Lint Passed
Unit
No Test Coverage
Build Status
Buildable 46134
Build 43023: arc lint + arc unit

Event Timeline

andrew created this revision.Jun 27 2022, 3:48 PM
Herald added a subscriber: imp. · View Herald TranscriptJun 27 2022, 3:48 PM
andrew requested review of this revision.Jun 27 2022, 3:48 PM
Harbormaster completed remote builds in B46134: Diff 107435.Jun 27 2022, 3:48 PM
This revision was not accepted when it landed; it landed in state Needs Review.Aug 25 2022, 11:18 AM
Closed by commit rG278111b8a541: Allow the kernel to emulate the physical counter on arm64 (authored by andrew). · Explain Why
This revision was automatically updated to reflect the committed changes.
andrew added a commit: rG278111b8a541: Allow the kernel to emulate the physical counter on arm64.

Revision Contents
Changeset List

PathSize
sys/
arm/
arm/
46 lines

Diff 107435

View Options

sys/arm/arm/generic_timer.c

Loading...