[Bug 286467] bhyve: Failed to emulate instruction sequence 418b0289024883c408c333c0488974

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=286467

            Bug ID: 286467
           Summary: bhyve: Failed to emulate instruction sequence
                    418b0289024883c408c333c0488974
           Product: Base System
           Version: 14.2-RELEASE
          Hardware: amd64
                OS: Any
            Status: New
          Severity: Affects Only Me
          Priority: ---
         Component: bhyve
          Assignee: virtualization@FreeBSD.org
          Reporter: freebsd@talk2dom.com

Hi,

I am running a Windows 10 64-bit VM guest under bhyve and every so often bhyve
exits with code 134. Very rough estimate is every few days?

In the bhyve logs I see this:

Unhandled memory access to 0x81013814c
Failed to emulate instruction sequence [ 418b0289024883c408c333c0488974 ] at
0xfffff80173d26ea4

I am passing through:
ppt0       0/2/0        Yes          CoffeeLake-S GT2 [UHD Graphics 630]
ppt2       0/20/0       Yes          Cannon Lake PCH USB 3.1 xHCI Host
Controller
ppt1       3/0/0        Yes          Wi-Fi 6E(802.11ax) AX210/AX1675* 2x2
[Typhoon Peak]


System info:
Hardware: Lenovo ThinkCentre M720q Tiny
CPU: Intel i7-9700T
GPU: Intel HD Graphics 630
OS: FreeBSD 14.1-RELEASE-p2

# freebsd-version -kru
14.2-RELEASE-p1
14.2-RELEASE-p1
14.2-RELEASE-p2

Relevant packages:
edk2-bhyve-g202308_6           EDK2 Firmware for bhyve

For more info about my system, see bug 280286
or FreeBSD forum thread:

https://forums.freebsd.org/threads/experience-from-bhyve-freebsd-14-1-gpu-passthrough-with-windows-10-guest.94118/post-661914

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