And last but not least the whole thing seems to work. After adding pci = ['09:04.0'] to domU and installing pciutils in that domU I see the device listed there. But I'm still unsure if it is okay to have it in lspci of dom0 too. Has someone else tried to use pciback as a module? Regrds, Günter Zimmermann Günter Zimmermann schrieb: > Hi, > > after thinking about modules and modprobe.conf I added this line to > modprobe.conf: > options pciback hide=(09:04.0) > > and rebuilt initrd. > mkinitrd -v --with=pciback /boot/initrd-2.6.18-164.6.1.el5xen_pcipt > 2.6.18-164.6.1.el5xen > > after a reboot I found this message in dmesg: > pciback 0000:09:04.0: seizing device > > looks like it works, but I still have the device in lspci in dom0. > Should it be listed in lspci if pciback is working or not? > > Regards > Günter Zimmermann > > > Günter Zimmermann schrieb: > >> Good morning, >> >> I need to use pciback.hide to hide a pci card because I want to pci >> passthrough that card to a domU. My hardware neither supports Intel-Vt-d >> nor AMD's IOMMU. Unfortunately this doesn't seem to work in Centos 54 >> anymore. I guess it doesn't work because it is not compiled into the >> kernel, but as a module. I got the following error in dmesg and the pci >> device is still listed in dom0 in lspci. >> >> Bootdata ok (command line is ro root=/dev/dom0/root pciback.hide=(09:04.0)) >> Kernel command line: ro root=/dev/dom0/root pciback.hide=(09:04.0) >> Unknown boot option `pciback.hide=(09:04.0)': ignoring >> >> I also tried to update initrd to include the module but got the same >> error message as above. >> >> mkinitrd --with=pciback /boot/initrd-2.6.18-164.6.1.el5xen_pcipt >> 2.6.18-164.6.1.el5xen >> title CentOS (2.6.18-164.6.1.el5xen PCI PT) >> root (hd1,0) >> kernel /xen.gz-2.6.18-164.6.1.el5 >> module /vmlinuz-2.6.18-164.6.1.el5xen ro root=/dev/dom0/root >> pciback.hide=(09:04.0) >> module /boot/initrd-2.6.18-164.6.1.el5xen_pcipt >> >> Is there any option to use pciback.hide kernel parameter without >> compiling a custom kernel? >> >> Thanks in advance >> Günter Zimmermann >> >> >> > _______________________________________________ > CentOS-virt mailing list > CentOS-virt at centos.org > http://lists.centos.org/mailman/listinfo/centos-virt > >