bhyve/aarch64: Handle unknown exceptions

When an exception class is unhandled by the kernel we handle it in
userspace by exiting the process. Rather than exiting raise an unknown
reason exception in

bhyve/aarch64: Handle unknown exceptions

When an exception class is unhandled by the kernel we handle it in
userspace by exiting the process. Rather than exiting raise an unknown
reason exception in the guest. The guest can then handle the exception
as it wishes.

Reviewed by: markj
Sponsored by: Arm Ltd
Differential Revision: https://reviews.freebsd.org/D46511

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bhyve: Assert success in a couple of libvmmapi calls

- In vmexit_smccc(), copy an assertion from amd64.
- In fbsdrun_addcpu(), make sure that our vm_suspend_cpu() call is
succesful.

Reviewed by:

bhyve: Assert success in a couple of libvmmapi calls

- In vmexit_smccc(), copy an assertion from amd64.
- In fbsdrun_addcpu(), make sure that our vm_suspend_cpu() call is
succesful.

Reviewed by: jhb
MFC after: 2 weeks
Sponsored by: Innovate UK
Differential Revision: https://reviews.freebsd.org/D46197

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bhyve: Sleep for a short period after VM_EXITCODE_DEBUG exits

As on amd64, APs will repeatedly exit until they are brought online, so this
hack helps avoid burning CPU time during guest bootup.

Rev

bhyve: Sleep for a short period after VM_EXITCODE_DEBUG exits

As on amd64, APs will repeatedly exit until they are brought online, so this
hack helps avoid burning CPU time during guest bootup.

Reviewed by: jhb
MFC after: 2 weeks
Sponsored by: Innovate UK
Differential Revision: https://reviews.freebsd.org/D46195

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