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Re: Xenbus issues on Qubes OS / win10
Theres also registry overrides HKLM\System\CCS\Service\Xen\Parameters XenLogLevel that can be set to 0 to disable logging via the Xen debug port, and QemuLogLevel for the QEMU debug port.
Owen
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On 23/06/2023 16:37, Rafał Wojdyła wrote:
> Hello,
>
> I'm trying the latest PV drivers on Qubes OS (backend is Xen 4.14.5)
> with Windows 10 pro and having some issues. Mainly, xenbus fails to
> initialize properly. I've attached a debug output, the main issue seems
> to be this:
>
> xenbus|StoreAcquire: ====>
> xenbus|GnttabAcquire: ====>
> xenbus|RangeSetPop: fail3
> xenbus|RangeSetPop: fail2
> xenbus|RangeSetPop: fail1 (c000009a)
> xenbus|FdoAllocateHole: fail1 (c000009a)
> xenbus|GnttabAcquire: fail2
> xenbus|GnttabAcquire: fail1 (c000009a)
> xenbus|StoreAcquire: fail1 (c000009a)
> xenbus|FdoD3ToD0: fail6
>
> ...which seems pretty suspicious. It's been some years since I looked at
> the drivers' code so any ideas as to what may be causing this are
> welcome :)
>
> I've built the driver myself from commit b03c9c0.
>
> Btw, is there a way to tell the drivers to leave the xen's serial
> console alone? I'm using it for debugging because adding a second serial
> device is currently problematic in Qubes.
>
Logging will go via QEMU's and Xen's debug ports. You should be able to
turn off logging to Xen's by nopping out the call to
LogAddDisposition(...XEN_PORT...) in src/xen/driver.c.
Paul
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