arm64/smmu: Support polling for sync completion
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Authored by andrew on Mon, Sep 7, 4:13 PM.

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Summary

When the hardware doesn't support MSIs we need to poll to wait for
sync operations to complete. Add support for this to support booting
on this hardware.

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Repository

rG FreeBSD src repository

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Build Status

Buildable 76635
Build 73518: arc lint + arc unit

Event Timeline

andrew created this revision.Mon, Sep 7, 4:13 PM

Herald added a reviewer: manu. · View Herald TranscriptMon, Sep 7, 4:13 PM

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

andrew requested review of this revision.Mon, Sep 7, 4:13 PM

Harbormaster completed remote builds in B76635: Diff 186139.Mon, Sep 7, 4:13 PM

andrew added a parent revision: D59487: arm64/smmu: Split out waiting for sync completion.Mon, Sep 7, 4:13 PM

andrew added a child revision: D59489: arm64/smmu: Only MSI poll when cache-coherent.

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sys/

arm64/

iommu/

smmu.c

39 lines

Diff 186139

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arm64/smmu: Support polling for sync completionNeeds ReviewPublicActions