Re: [Xen-users] PCI Passthrough of iwlwifi adapter into Windows HVM failed to start

[John Mok <a9121431@xxxxxxxxx>]

>Just to confirm, are you certain that the driver in question really does work 
>when it is running on baremetal ....?

Yes, the driver works on baremetal, but not try on other
virtualization passthrough.

>I'm just guessing here, but does dmesg/journalctl have anything to say on the 
>Dom0 side? In particular, an error about the driver >attempting to write to 
>read-only configuration space could indicate that you need the "permissive=1" 
>flag. See 
>http://wiki.xenproject.org/wiki/Xen_PCI_Passthrough#PV_guests_and_PCI_quirks

I do not see anything complaining driver failing to write to read-only
configuration space. But somehow the Windows 7 HVM guest could not
bring up the Intel AC 7265 driver with error code 10 (fail to start).

As the driver could run on baremetal, it should be a Xen PCI
passthrough problem.

I hope someone could advise how to solve the problem, or point me to
the right direction.

Thanks a lot.

John Mok

On Thu, Dec 31, 2015 at 6:01 AM,  <sm8ax1@xxxxxxxxxxx> wrote:
> Quoting "John Mok" <a9121431@xxxxxxxxx>:
>
>> Hi,
>>
>> I am using Xen 4.4.1 on Debian Jessie on Lenovo ThinkPad X250.
>>
>> I succeeded to passthrough the Intel AC 7265 adapter to the Windows
>> HVM. However, when I installed the Intel driver (with embedded
>> firmware), the device failed to start with code 10.
>>
>> I tried to switch between GPL PV driver and SuSE VMDP 2.2, and it made
>> no difference.
>>
>> I hope someone could point me how to pass through and make the Intel
>> AC 7265 adapter working on the Windows HVM.
>>
>> Thanks a lot.
>>
>> John Mok
>>
>> _______________________________________________
>> Xen-users mailing list
>> Xen-users@xxxxxxxxxxxxx
>> http://lists.xen.org/xen-users
>>
>>
>
> Just to confirm, are you certain that the driver in question really does
> work when it is running on baremetal or some other virtualization? I.e. this
> problem really is Xen related, and not a problem with the driver, OS, or
> device itself?
>
> I'm just guessing here, but does dmesg/journalctl have anything to say on
> the Dom0 side? In particular, an error about the driver attempting to write
> to read-only configuration space could indicate that you need the
> "permissive=1" flag. See
> http://wiki.xenproject.org/wiki/Xen_PCI_Passthrough#PV_guests_and_PCI_quirks
>
>
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