Differential D46078

arm64/vmm: Teach the switcher about new registers
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Authored by andrew on Jul 23 2024, 11:20 AM.

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arm64
bhyve

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rG7861ecd18b6f: arm64/vmm: Teach the switcher about new registers

Summary

To support booting the kernel in EL2 some of the EL0 and EL1 registers
are changed to point to an EL2 version. To get access to the EL0/EL1
version of these registers we need to use the new EL02 and EL12
registers, e.g. to access elr_el1 from the host we would use elr_el12.

Add macros that can be different on VHE vs non-VHE code so these
registers can be accessed in the correct way.

Sponsored by: Arm Ltd

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rG FreeBSD src repository

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Event Timeline

andrew created this revision.Jul 23 2024, 11:20 AM

Herald added a reviewer: manu. · View Herald TranscriptJul 23 2024, 11:20 AM

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

andrew requested review of this revision.Jul 23 2024, 11:20 AM

Harbormaster completed remote builds in B58776: Diff 141259.Jul 23 2024, 11:20 AM

andrew added a parent revision: D46077: arm64/vmm: Restore hcr_el2 earlier.Jul 23 2024, 11:20 AM

andrew added a child revision: D46079: arm64/vmm: Only store the guest par_el1.

This revision was not accepted when it landed; it landed in state Needs Review.Aug 20 2024, 9:03 AM

Closed by commit rG7861ecd18b6f: arm64/vmm: Teach the switcher about new registers (authored by andrew). · Explain Why

This revision was automatically updated to reflect the committed changes.

andrew added a commit: rG7861ecd18b6f: arm64/vmm: Teach the switcher about new registers.

Revision Contents
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Path

Size

sys/

arm64/

vmm/

89 lines

4 lines

Diff 142241

sys/arm64/vmm/vmm_hyp.c

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sys/arm64/vmm/vmm_nvhe.c

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