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

[Wanpeng Qian]

Hi Peter

>   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)

After disabling tpr_shadowing, the Windows 10 1909 client boots
without the IRQL_NOT_LESS_OR_EQUAL BSoD,
(Windows 10 is very slow without tpr shadowing)

But the driver didn't work.
With Windows 10 built in driver, device status is :

Windows is still setting up the class configuration for this device. (Code 56)

When installing chelsio driver, cause BSoD,
which is SYSTEM_THREAD_EXCEPTION_NOT_HANDLE (chnetx64.sys)

I also try Windows 2012, same as Windows 10, BSoD while installing driver.

And Windows 7 Pro, the chelsio driver didn't have a valid digial signed,
not working.

Thanks

Qian

On Fri, Mar 13, 2020 at 11:06 AM Peter Grehan <grehan at freebsd.org> wrote:
>
> > 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.
>