I personnaly needed the acs patch and add to make myself a custom kernel on fedora (hba card for zfs raid). Arch is easier for this since one guy is maitaining a patched kernel, you just have to download it. On Sun, 28 Feb 2016 at 10:14, Okky Hendriansyah <[email protected]> wrote:
> On February 28, 2016 at 15:42:05, stein van broekhoven ( > [email protected]) wrote: > >> ... >> > >> If anybody would attempt a build like this I would recommend Manjaro with >> plasma 5.5 (KDE) >> And follow this guide: >> https://wiki.archlinux.org/index.php/PCI_passthrough_via_OVMF >> Only difference is: >> # mkinitcpio -p linux >> # mkinitcpio -p linux41 >> >> You do NOT need the kernel patch from: >> https://aur.archlinux.org/packages/linux-vfio/ >> >> >> >> Sent from my iPhone >> > > Hi Stein, > > Please correct me if I am wrong, but I think the question of whether one > needs the kernel patches that linux-vfio incorporates or not, really > depends on one's setup and hardware. > > The Intel HD arbitration patch is still needed if legacy VGA assignment > (with Seabios) is still being used on Intel platforms with integrated Intel > HD Graphics. > > The PCIe ACS override patch is still needed if the platform does not > support ACS and using other available PCIe slots for the host. Although > I've seen in this list that sometimes not all ACS cases can be solved by > this patch. > > For instance, my previous platform was Haswell i7-4770 with a GTX 980, a > USB 3.0 card, and a NIC card passed to Windows 10 guest (OVMF) while having > a RAID card in the last PCIe slot for my Arch Linux host ZFS disk array. In > my case, I did not need the Intel HD arbitration patch since I use the > legacy-free approach with OVMF. But I still need the PCIe ACS override > patch since the default IOMMU grouping did not separate my RAID card with > other PCIe devices. > > Other example on one of the members here, had similar platform as mine. > But he only has a GPU on his slots, thus he did not need the PCIe ACS > override patch. > > Best regards, > Okky Hendriansyah > > > _______________________________________________ > vfio-users mailing list > [email protected] > https://www.redhat.com/mailman/listinfo/vfio-users >
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