Passthru a VF to Windows guest cause BSOD, chelsio T520BT, SR-IOV

[Peter Grehan]

> When I pass the same VF1 to Windows 10 guest, ver 1909, the guest got
> BSOD during installation. I also try to add VF1 post installation.
> also got BSOD.
> the message is IRQL_NOT_LESS_OR_EQUAL.
> I also try Windows server 2012, during installation of Chelsio Driver, BSOD too.
> 
> Any suggestions? driver issue or bhyve issue?

  Can you try disabling APIC acceleration (which should be available on 
that Xeon E5) ? This can be done on the fly using kenv and 
unloading/reloading vmm.ko (or loader.conf and rebooting)

kenv hw.vmm.vmx.use_tpr_shadowing=0
kldunload vmm
kldload vmm

later,

Peter.