arm64: gic: disable the ITS if it's enabled prior to configuration
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Authored by kevans on Mar 14 2022, 4:46 AM.

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Reviewers

andrew
manu

Group Reviewers

arm64

Commits

rG1236b04bb704: arm64: gic: disable the ITS if it's enabled prior to configuration

Summary

The ITS is defined to be disabled on a warm reset, but we may be coming
in via another kernel/hypervisor type setup where the ITS has been
previously configured then relinquished to the next kernel in the chain.

If it's enabled, the later configuration of GITS_BASER will almost
certainly fail -- clear it to prevent that.

Sponsored by: Ampere Computing
Submitted by: Klara, Inc.

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Repository

rG FreeBSD src repository

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Tests Not Applicable

Event Timeline

kevans created this revision.Mar 14 2022, 4:46 AM

Herald added a reviewer: manu. · View Herald TranscriptMar 14 2022, 4:46 AM

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

kevans requested review of this revision.Mar 14 2022, 4:46 AM

Harbormaster completed remote builds in B44761: Diff 103812.Mar 14 2022, 4:47 AM

andrew accepted this revision.Mar 14 2022, 2:45 PM

This revision is now accepted and ready to land.Mar 14 2022, 2:45 PM

Closed by commit rG1236b04bb704: arm64: gic: disable the ITS if it's enabled prior to configuration (authored by kevans). · Explain WhyMar 19 2022, 3:47 AM

This revision was automatically updated to reflect the committed changes.

kevans added a commit: rG1236b04bb704: arm64: gic: disable the ITS if it's enabled prior to configuration.

Revision Contents
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Size

sys/

arm64/

gicv3_its.c

17 lines

Diff 104007

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sys/arm64/arm64/gicv3_its.c

arm64: gic: disable the ITS if it's enabled prior to configurationClosedPublicActions