[Bug 292895] Reproducible ARM64/bhyve panic on CIX/Cortex-A720 platforms

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=292895

            Bug ID: 292895
           Summary: Reproducible ARM64/bhyve panic on CIX/Cortex-A720
                    platforms
           Product: Base System
           Version: 15.0-STABLE
          Hardware: arm64
                OS: Any
            Status: New
          Severity: Affects Some People
          Priority: ---
         Component: bhyve
          Assignee: virtualization@FreeBSD.org
          Reporter: editor@callfortesting.org

Created attachment 267719
  --> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=267719&action=edit
Text dump of panic

Target hardware: Minisforum MS-R1 and Orange Pi 6 with the Cortex-A720 CPU

Tested host versions: 15.0-STABLE from 2026-01 and 16.0-CURRENT 20260202

Expected behavior: 15.0-RELEASE VM-IMAGE boot per Ampere, ThunderX

Surprise behavior: Whole system freezes requiring reset, partial freeze,
network reset, console corruption, panic.

Prior to the 20260202 16.0-CURRENT snapshot, the results were very
unpredictable and never panicking. Pings in one console would stop upon VM boot
but but be resumable. top(1) would continue running. 'dwatch execve' would only
show the bhyve launch string. One console would expand 'top' to
'toppppppppppppppp'.

See the attached text dump. I can add photos of the hardware console panic if
it will help and am happy to retrieve other requested information.

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