Re: [Xen-devel] PCI passthrough will cause unknown device appearance in device manager of Windows OS via xenstore keys

[Stefano Stabellini <sstabellini@xxxxxxxxxx>]

On Thu, 13 Apr 2017, Roger Pau Monné wrote:
> On Thu, Apr 13, 2017 at 09:41:03AM +0100, Wei Liu wrote:
> > On Wed, Apr 12, 2017 at 04:21:42PM -0400, Konrad Rzeszutek Wilk wrote:
> > > On Wed, Apr 12, 2017 at 04:46:33PM +0100, Wei Liu wrote:
> > > > On Mon, Apr 10, 2017 at 09:43:13AM -0400, Konrad Rzeszutek Wilk wrote:
> > > > [...]
> > > > > 
> > > > > .. Except that we need some way of doing FLR and Pciback
> > > > > is the one doing it.
> > > > > 
> > > > > The right way would be to expand pciback to support the do_flr ioctl
> > > > > and combine it with your patch.
> > > > > 
> > > > 
> > > > OK. Does that mean the bug is in Linux and I should just take Ross's
> > > 
> > > Please don't.
> > > 
> > > Or if you would like I can do
> > > 
> > > Nacked-by: Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>
> > > 
> > 
> > Please correct me if I'm wrong: current libxl code is broken in one way and
> > taking that patch means to break it in another way?
> > 
> > What is the way forward? Do you want me to wait until those kernel
> > patches are upstreamed?
> 
> Julien was looking into moving all this reset logic into the hypervisor 
> itself,
> so that ARM and PVHv2 passthrough doesn't use pciback at all. Maybe it could 
> be
> done now? AFAICT this would solve the issue under discussion here.
 
That is a medium to long term goal and I wouldn't rely on it to fix an
outstanding bug.

_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxx
https://lists.xen.org/xen-devel