Use the physical timer when able
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Authored by andrew on Mar 15 2023, 2:18 PM.

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imp
kevans

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ARM
arm64

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rG02f3d094aead: Use the arm physical timer when able

Summary

To allow bhyve manage the virtual timer while in a guest have FreeBSD
use the virtual timer only when bhyve will be unavailable due to not
starting at EL2 where the hypervisor switcher will run.

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Repository

rG FreeBSD src repository

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Build Status

Buildable 50381
Build 47272: arc lint + arc unit

Event Timeline

andrew created this revision.Mar 15 2023, 2:18 PM

Herald added a subscriber: imp. · View Herald TranscriptMar 15 2023, 2:18 PM

andrew requested review of this revision.Mar 15 2023, 2:18 PM

Harbormaster completed remote builds in B50378: Diff 118850.Mar 15 2023, 2:18 PM

Fix a typo

Harbormaster completed remote builds in B50381: Diff 118853.Mar 15 2023, 2:19 PM

Assuming we know the res is always non-null in these cases, I think we're good. I kinda think they should be, but that's just from a quick read.

sys/arm/arm/generic_timer.c
664	only question: are we guaranteed that these timers will be around in this case? Similar below...

This revision is now accepted and ready to land.Mar 15 2023, 2:55 PM

andrew added inline comments.Mar 15 2023, 3:27 PM

sys/arm/arm/generic_timer.c
664	We require the virtual and physical timer interrupts as they are marked non-optional in `arm_tmr_irq_defs`

kevans accepted this revision as: kevans.Mar 15 2023, 3:38 PM

Closed by commit rG02f3d094aead: Use the arm physical timer when able (authored by andrew). · Explain WhyMar 15 2023, 3:49 PM

This revision was automatically updated to reflect the committed changes.

andrew added a commit: rG02f3d094aead: Use the arm physical timer when able.

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sys/

arm/

generic_timer.c

18 lines

Diff 118853

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sys/arm/arm/generic_timer.c

Use the physical timer when ableClosedPublicActions