Paths

Table of Contentst

Differential D56599

arm64: VM/PMAP changes for CCA guest support
ClosedPublic
Actions

Authored by sarah.walker2_arm.com on Apr 23 2026, 10:30 AM.

Tags

None

Referenced Files

	F168046027: D56599.id176244.diff
	Wed, Aug 26, 3:03 AM

	Unknown Object (File)
	Tue, Aug 25, 5:56 AM

	Unknown Object (File)
	Tue, Aug 25, 5:39 AM

	Unknown Object (File)
	Fri, Aug 21, 10:16 PM

	Unknown Object (File)
	Sun, Aug 16, 4:14 PM

	Unknown Object (File)
	Fri, Aug 14, 7:42 AM

	Unknown Object (File)
	Sat, Aug 8, 4:41 PM

	Unknown Object (File)
	Sat, Aug 8, 4:02 PM

View All 59 Files

Subscribers

Details

Reviewers

andrew
manu
alc
markj
kib

Commits

rG56abdbc5f709: arm64: VM/PMAP changes for CCA guest support

Summary

When in a realm:

Mappings with mode VM_MEMATTR_DEVICE and VM_MEMATTR_DEVICE_NP are unprotected
Imported busdma buffers in protected memory are always bounced
If EARLY_PRINTK is in use, the UART physical address must be in the unprotected address space

Sponsored by: Arm Ltd

Diff Detail

Repository

rG FreeBSD src repository

Lint

Lint Not Applicable

Unit

Tests Not Applicable

Event Timeline

sarah.walker2_arm.com created this revision.Apr 23 2026, 10:30 AM

Herald added a reviewer: andrew. · View Herald TranscriptApr 23 2026, 10:30 AM

Herald added a reviewer: andrew. · View Herald Transcript

Herald added a reviewer: manu. · View Herald Transcript

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

sarah.walker2_arm.com requested review of this revision.Apr 23 2026, 10:30 AM

Harbormaster completed remote builds in B72465: Diff 176244.Apr 23 2026, 10:30 AM

sarah.walker2_arm.com added a parent revision: D56598: arm64: Add RSI detection for CCA.Apr 23 2026, 10:30 AM

sarah.walker2_arm.com added a child revision: D56600: arm64: Load SOCDEV_PA as a literal rather than an immediate.

sarah.walker2_arm.com mentioned this in D56520: arm64: Add CCA guest support.Apr 23 2026, 10:31 AM

andrew added reviewers: alc, markj, kib.Apr 23 2026, 3:49 PM

andrew added inline comments.

sys/arm64/arm64/efirt_machdep.c
233	Needs to be on `pa` not page table entry
sys/arm64/arm64/pmap.c
4237
5454–5455	This should be applied to `pa` as it may be wrong under FEAT_LPA2
5774	Is this correct when entering a large page, e.g. when `psind == 2` a level 2 block will be created

Address review comments

Harbormaster completed remote builds in B72488: Diff 176274.Apr 23 2026, 5:26 PM

andrew accepted this revision.May 5 2026, 2:02 PM

This revision is now accepted and ready to land.May 5 2026, 2:02 PM

Closed by commit rG56abdbc5f709: arm64: VM/PMAP changes for CCA guest support (authored by sarah.walker2_arm.com, committed by andrew). · Explain WhyMay 12 2026, 4:56 PM

This revision was automatically updated to reflect the committed changes.

andrew added a commit: rG56abdbc5f709: arm64: VM/PMAP changes for CCA guest support.

Revision Contents
Changeset List

Path

Size

sys/

arm64/

arm64/

busdma_bounce.c

68 lines

efirt_machdep.c

10 lines

40 lines

conf/

1 line

vm/

8 lines

Diff 177688

sys/arm64/arm64/busdma_bounce.c

Loading...

sys/arm64/arm64/efirt_machdep.c

Loading...

sys/arm64/arm64/pmap.c

Loading...

sys/conf/files.arm64

Loading...

sys/vm/vm_page.c

Loading...