On 2011-05-09 08:45, Pasi Kärkkäinen wrote: > On Fri, May 06, 2011 at 04:18:14PM +0200, Robin Axelsson wrote: >> On 2011-05-06 08:03, Pasi Kärkkäinen wrote: >>> On Thu, May 05, 2011 at 07:48:36PM +0200, Robin Axelsson wrote: >>>> Hi, >>>> I have compiled Jeremy's kernel on Fedora 14 and it turned out that >>>> xen-pciback is compiled into the kernel as a module. So I made a >>>> "xen-pciback.conf" file in /etc/modprobe.d. The problem is that I have >>>> to get modprobe to load before the drivers to the PCI devices I want to >>>> hide are loaded. >>>> >>>> So my question is how do I locate the drivers and find the points in the >>>> boot scripts where I can put the modprobe so that it is loaded before >>>> them? I tried lsmod and modinfo but they don't give much information. I >>>> only managed to find the driver for the Intel EXPI9400PT adapter e1000e. >>>> >>>> I want to hide the graphics adapter (Radeon 5450), Two USB2.0 ports, the >>>> Intel adapter, the USB3.0 controller and the Audio device, their >>>> assignments on machine are as follows: >>>> >>>> pci_0000_00_02_0 (GPU) >>>> pci_0000_00_12_0 (USB 2.0 should give 2 ports) >>>> pci_0000_00_14_2 (Audio device) >>>> pci_0000_00_0a_0 (Intel Adapter) >>>> pci_0000_00_09_0 (USB 3.0 Interface) >>>> >>>> but the question is where can I locate their drivers and how can I tap >>>> into the boot sequence so that the xen-pciback driver is loaded >>>> beforehand? The page >>>> >>>> http://wiki.xensource.com/xenwiki/Assign_hardware_to_DomU_with_PCIBack_as_module >>>> >>>> gives no information about this. It mentions something about "install >>>> skge ... " but it doesn't say where this line is to be put and how you >>>> figure out that skge is the driver to be disabled. >>>> >>> You probably should add the modules to be loaded from initrd image. >>> >>> Are you using mkinitrd? If yes, there's an option to preload modules.. >>> >>> -- Pasi >> I issued the command >> >> mkinitrd -v -f --preload xen-pciback /boot/initramfs-2.6.32.39.img >> 2.6.32.39 >> >> and I noticed that the initramfs image file generated is considerably >> smaller than the initramfs imagefile generated by dracut. The dracut >> file is a bit over 80 MB whereas the new one is less than 8 MB. >> >> But the preload doesn't load the xen-pciback module. After the reboot >> when I list assignable PCI devices using xm, Xen returns nothing. If I >> issue 'modprobe xen-pciback' and then list the devices using xm I get >> one entry. What's wrong? >> > Hmm.. Is it possible that the other xen-related required modules > are not yet loaded at that point, so loading xen-pciback fails? > > You could always extract initramfs-2.6.32.39.img and read the 'init' > script in it and see what it's trying to do.. > > -- Pasi > Perhaps you know how to extract the initramfs? I'm unable to find the compression headers and I'm not sure what headers to look for. In the first step I tried to locate the gzip header: # grep -a -b --only-matching $'\x8B'$'\x08' \boot\initramfs-`uname -r`.img (offset1): (pattern) ... (offset<n>): (pattern) # dd if=/boot/intramfs-`uname -r`.img bs=1 skip=(offset1) | gunzip > myimagefile but I'm unable to get to the cpio file. I tried once again grepping for compression headers in myimagefile but I couldn't find anything. It appears not to be compressed with zx, bzip2 or gzip. I could not use cpio on the file directly either. Robin. >>>> I have set up the machine to init level 3 in the /etc/inittab (my >>>> install of F14 have no upstart targets). The xen-pciback module seems to >>>> be working. Something is wrong with the onboard sound chip. No drivers >>>> have ever successfully initiated it, neither in Windows nor Linux. So it >>>> is marked as an assignable device when looking it up with xm. >>>> >>>> Regards >>>> >>>> Robin. >>>> >>>> -- >>>> xen mailing list >>>> xen@xxxxxxxxxxxxxxxxxxxxxxx >>>> https://admin.fedoraproject.org/mailman/listinfo/xen >>> . >>> >> -- >> xen mailing list >> xen@xxxxxxxxxxxxxxxxxxxxxxx >> https://admin.fedoraproject.org/mailman/listinfo/xen > . > -- xen mailing list xen@xxxxxxxxxxxxxxxxxxxxxxx https://admin.fedoraproject.org/mailman/listinfo/xen
