[vfio-users] Installing Catalyst prevents VM from booting.
Bronek Kozicki
brok at spamcop.net
Thu Dec 27 20:31:20 UTC 2018
Huh. Good point. Admittedly you might want to reuse very similar VM for both Windows and Linux.
--
Bronek Kozicki
brok at spamcop.net
On Thu, 27 Dec 2018, at 8:25 PM, Brett Foster wrote:
> Wait, we're talking about Linux +ati drivers? Alright, then I have no
> idea... but if it's windows, try the 440 and see if that helps.
>
> Brett
>
> Sent from my BlackBerry - the most secure mobile device
>
> Original Message
> From: brok at spamcop.net
> Sent: December 27, 2018 12:21 PM
> To: fosterb at edgeandvertex.org; erratic at yourstruly.sx; vfio-users at redhat.com
> Subject: Re: [vfio-users] Installing Catalyst prevents VM from booting.
>
> Some Linuxes do not boot on 440FX (at least, not for me with booting
> with UEFI, which is recommended for GPU passthrough).
>
>
> B.
>
>
> On Thu, 27 Dec 2018, at 8:18 PM, Brett Foster wrote:
> > Why use q35? I always thought that wasn't recommended. At least a couple
> > years ago, that was my impression.
> >
> >
> > Sent from my BlackBerry - the most secure mobile device
> >
> > Original Message
> > From: erratic at yourstruly.sx
> > Sent: December 27, 2018 12:12 PM
> > To: fosterb at edgeandvertex.org; brok at spamcop.net
> > Cc: vfio-users at redhat.com
> > Subject: Re: [vfio-users] Installing Catalyst prevents VM from booting.
> >
> >
> > BTW I think the specific reason you want to separate your pcie endpoints
> > on q35 from the root complex using a switch or up/downstream ports is
> > due to the fact that the root complex has direct access to memory. I
> > can't find anything more specific regarding why that might be
> > problematic but I know that pcie addressing is different for devices
> > downstream as opposed to being connected directly to the root complex. I
> > arrived at the conclusion that the amd driver works now with q35 because
> > changed the topology as per the advice I read somewhere regarding how it
> > should be done. I'd like to know for sure but I don't really understand
> > PCIe well enough and I think as far as the driver is concerned its up to
> > a guess as to why one configuration works and the other doesn't (unless
> > you have better luck getting the windows remote kernel debugging to work
> > than I have.)
> > ________________________________________
> > From: vfio-users-bounces at redhat.com <vfio-users-bounces at redhat.com> on
> > behalf of Brett Foster <fosterb at edgeandvertex.org>
> > Sent: Wednesday, December 26, 2018 11:24:48 AM
> > To: Bronek Kozicki
> > Cc: vfio-users
> > Subject: Re: [vfio-users] Installing Catalyst prevents VM from booting.
> >
> > I have been using AMD via i440fx for like 5 years or so (across
> > different hardware and graphics cards). The drivers that work are the
> > ones that come via Windows Update. The drivers distributed by AMD do
> > not. Not sure why since presumably they come from the same place. lol.
> >
> > On Tue, Dec 25, 2018 at 9:51 AM Bronek Kozicki
> > <brok at spamcop.net<mailto:brok at spamcop.net>> wrote:
> > On Tue, 25 Dec 2018, at 4:21 PM, Paige Thompson wrote:
> > > Hey,
> > >
> > > From what I understand in general connecting devices straight to the
> > > root complex is problematic and they should be connected to a bridge. I
> > > was kind of wondering if anybody had any knowledge of this. I find the
> > > configuration really confusing. I still cant really tell how the
> > > topology works.
> >
> >
> > Hope Alex will shed some light on it when he's back from the holiday break.
> >
> >
> > --
> > Bronek Kozicki
> > brok at spamcop.net<mailto:brok at spamcop.net>
> >
> > _______________________________________________
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> > vfio-users at redhat.com<mailto:vfio-users at redhat.com>
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