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Differential D48964

arm64: Add a sysctl to read the current exception level
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Authored by markj on Feb 12 2025, 3:32 PM.
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andrew
manu
Summary

This is useful for determining whether VHE is enabled.

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rG FreeBSD src repository
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Buildable 62395
Build 59279: arc lint + arc unit

Event Timeline

markj created this revision.Feb 12 2025, 3:32 PM
Herald added a reviewer: manu. · View Herald TranscriptFeb 12 2025, 3:32 PM
Herald added subscribers: emaste, imp. · View Herald Transcript
markj requested review of this revision.Feb 12 2025, 3:32 PM
Harbormaster completed remote builds in B62395: Diff 150908.Feb 12 2025, 3:32 PM
markj added a child revision: D48965: arm64/vmm: Don't set MDSCR_KDE in the guest when single stepping.Feb 12 2025, 3:32 PM
andrew added a comment.Feb 13 2025, 6:16 PM

What in userspace needs to know about it?

markj added a comment.Feb 14 2025, 3:28 PM
In D48964#1117173, @andrew wrote:

What in userspace needs to know about it?

Nothing in particular, I just wanted a way to tell whether VHE is in use. Is there another way to determine that?

andrew accepted this revision.Feb 18 2025, 5:16 PM
In D48964#1117399, @markj wrote:
In D48964#1117173, @andrew wrote:

What in userspace needs to know about it?

Nothing in particular, I just wanted a way to tell whether VHE is in use. Is there another way to determine that?

No, but most things shouldn't care

This revision is now accepted and ready to land.Feb 18 2025, 5:16 PM

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sys/
arm64/
arm64/
16 lines

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sys/arm64/arm64/machdep.c

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