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: erra...@yourstruly.sx > Sent: December 27, 2018 12:12 PM > To: fost...@edgeandvertex.org; b...@spamcop.net > Cc: vfio-users@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-boun...@redhat.com <vfio-users-boun...@redhat.com> on > behalf of Brett Foster <fost...@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 > <b...@spamcop.net<mailto:b...@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 > b...@spamcop.net<mailto:b...@spamcop.net> > > _______________________________________________ > vfio-users mailing list > vfio-users@redhat.com<mailto:vfio-users@redhat.com> > https://www.redhat.com/mailman/listinfo/vfio-users _______________________________________________ vfio-users mailing list vfio-users@redhat.com https://www.redhat.com/mailman/listinfo/vfio-users
