arm64: Also populate tpidr_el2
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Authored by andrew on Oct 22 2024, 5:37 PM.

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Subscribers

emaste

imp

Details

Reviewers

manu

Group Reviewers

arm64

Summary

When enabling the Software Delegated Exception Interface (SDEI) the
firmware may trash tpidr_el1. As this is used to store the per-cpu
data pointer this causes issues when we need to access this memory,
e.g. in a non-SDEI exception.

Fix this by also storing the per-CPU pointer value in tpidr_el2 when
in VHE as this isn't trashed.

Diff Detail

Repository

rG FreeBSD src repository

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Unit

Tests Skipped

Build Status

Buildable 60155
Build 57039: arc lint + arc unit

Event Timeline

andrew created this revision.Oct 22 2024, 5:37 PM

Herald added a reviewer: manu. · View Herald TranscriptOct 22 2024, 5:37 PM

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

andrew requested review of this revision.Oct 22 2024, 5:37 PM

Harbormaster completed remote builds in B60155: Diff 145358.Oct 22 2024, 5:37 PM

andrew added a child revision: D47245: dev/psci: Allow smccc.h to be included from asm.Oct 22 2024, 5:37 PM

Revision Contents
Changeset List

Path

Size

sys/

arm64/

machdep.c

6 lines

mp_machdep.c

4 lines

Diff 145358

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sys/arm64/arm64/machdep.c