Re: [win-pv-devel] Hi, a question about the checksum offload and WinDivert

[Paul Durrant <Paul.Durrant@xxxxxxxxxx>]

De-html-ing (again)...

From: Haohao Lee [mailto:hayatelee@xxxxxxxxx] 
Sent: 06 November 2018 18:21
To: Paul Durrant <Paul.Durrant@xxxxxxxxxx>
Cc: win-pv-devel@xxxxxxxxxxxxxxxxxxxx
Subject: Re: [win-pv-devel] Hi, a question about the checksum offload and 
WinDivert

[snip]
> > > > > The driver property does not mention IP or TCP, just checksum
> > offload (But our problem only occurs for TCP)
> > > > > Here I have a screenshot https://user-
> > http://images.githubusercontent.com/238419/47770931-46b6ad80-dd1c-11e8-8010-
> > 42d05baf018b.png
>
> Ok, that tells me you are not using Xen Project PV drivers. Where did you get 
> your PV drivers from?
> > It should be from Citrix Virtual Desktop solution. Here is a screenshot of 
> > the driver version
> > 
> >https://user-images.githubusercontent.com/238419/47770995-8087b400-dd1c-11e8-894b-9fd0c2188732.png

No, those drivers are nothing to do with Citrix. They are a set of drivers 
written for Windows guests running on upstream Xen with source released under 
the GPL, making them impossible to get logo signed by Microsoft... so unusable 
for Citrix customers in general. See 
https://wiki.xen.org/wiki/Xen_FAQ_Drivers,_Windows.

> > Can I use Xen Project PV drivers for Citrix Products for they are still Xen 
> > Server based anyway?

The Xen Project PV drivers are indeed derived from drivers written by myself 
and my colleagues at Citrix. They were originally just for XenServer but we 
made them open source (with BSD license to avoid logo signing issues) and they 
are now designed to work well on a vanilla upstream Xen installation as well as 
under XenServer, so you should have no problem using them in either 
environment. If you are running XenServer though then you really have no reason 
not to use the Citrix branded version of the drivers that come on the 
installation media.

For more information see the project front page at 
https://xenproject.org/developers/teams/windows-pv-drivers.html and you can 
find the latest set of (Linux Foundation) signed drivers at 
http://xenbits.xen.org/pvdrivers/win/8.2.1.

> >
> > Thanks for you kind response so far. 
>

No problem. Please note that neither the Xen Project or XenServer drivers are 
compatible with the GPLPV drivers so you will need to completely purge those 
drivers from your VM (and return to using emulated hardware) *before* 
attempting to install new drivers.

  Cheers,

    Paul
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