arm64/vmm: Disable fine grained trapping of range-based TLBI instructions
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Authored by sarah.walker2_arm.com on Thu, Oct 1, 10:24 AM.

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Reviewers

andrew
manu

Summary

vmm passes the FEAT_TLBIRANGE field of ID_AA64ISAR0_EL1 to the guest, but also
enables fine-grained traps in the range-based TLBI instructions. This didn't
cause a problem until commit 5549785
("arm64 pmap: use range-based TLBI instructions"); following this commit, the VM
will exit with VM_EXITCODE_REG_EMUL during boot if the host supports FEAT_FGT and
FEAT_TLBIRANGE.

This commit disables fine-grained trapping of these instructions.

Diff Detail

Repository

rG FreeBSD src repository

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Unit

Tests Skipped

Build Status

Buildable 77577
Build 74460: arc lint + arc unit

Event Timeline

sarah.walker2_arm.com created this revision.Thu, Oct 1, 10:24 AM

Herald added a reviewer: andrew. · View Herald TranscriptThu, Oct 1, 10:24 AM

Herald added a reviewer: andrew. · View Herald Transcript

Herald added a reviewer: manu. · View Herald Transcript

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sarah.walker2_arm.com requested review of this revision.Thu, Oct 1, 10:24 AM

Harbormaster completed remote builds in B77575: Diff 188302.Thu, Oct 1, 10:24 AM

sarah.walker2_arm.com retitled this revision from arm64/vmm: Don't trap range-based TLBI instructions if FEAT_TLBIRANGE present to arm64/vmm: Disable fine grained trapping of range-based TLBI instructions.Thu, Oct 1, 12:32 PM

sarah.walker2_arm.com edited the summary of this revision. (Show Details)