arm64: disable the EL2 MMU in early boot
ClosedPublic
Actions

Authored by kevans on Mar 23 2022, 3:20 PM.

Tags

None

Referenced Files

	Unknown Object (File)
	Thu, May 2, 12:06 AM

	Unknown Object (File)
	Thu, Apr 25, 6:19 AM

	Unknown Object (File)
	Mar 18 2024, 7:19 PM

	Unknown Object (File)
	Mar 2 2024, 6:43 AM

	Unknown Object (File)
	Feb 10 2024, 2:49 PM

	Unknown Object (File)
	Feb 9 2024, 2:22 AM

	Unknown Object (File)
	Jan 14 2024, 8:58 AM

	Unknown Object (File)
	Dec 23 2023, 1:57 AM

View All 18 Files

Subscribers

emaste

imp

Details

Reviewers

andrew
manu

Group Reviewers

arm64

Commits

rG51adf913e881: arm64: disable the EL2 MMU before dropping to EL1

Summary

An earlier stage may have set HCR_EL2.E2H, the clearing of which may
break address translation. We don't need the EL2 MMU at this point, so
we can avoid re-enabling it for now and just drop to EL1 as usual.

Author: andrew
Tested by: kevans

Diff Detail

Repository

rG FreeBSD src repository

Lint

Lint Not Applicable

Unit

Tests Not Applicable

Event Timeline

kevans created this revision.Mar 23 2022, 3:20 PM

Herald added a reviewer: manu. · View Herald TranscriptMar 23 2022, 3:20 PM

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

kevans requested review of this revision.Mar 23 2022, 3:20 PM

Harbormaster completed remote builds in B44864: Diff 104114.Mar 23 2022, 3:21 PM

andrew accepted this revision.Mar 23 2022, 3:29 PM

This revision is now accepted and ready to land.Mar 23 2022, 3:29 PM

Closed by commit rG51adf913e881: arm64: disable the EL2 MMU before dropping to EL1 (authored by kevans). · Explain WhyMay 13 2022, 3:08 AM

This revision was automatically updated to reflect the committed changes.

kevans added a commit: rG51adf913e881: arm64: disable the EL2 MMU before dropping to EL1.

Revision Contents
Changeset List

Path

Size

sys/

arm64/

locore.S

10 lines

Diff 105936

View Options

arm64: disable the EL2 MMU in early bootClosedPublicActions