On Fri, Feb 25, 2011 at 12:06 AM, Chris Wright <chrisw@xxxxxxxxxxxx> wrote: > * James Neave (roboj1m@xxxxxxxxx) wrote: >> OK, here's my latest dmesg with amd_iommu_dump and debug with no quiet >> http://pastebin.com/JxEwvqRA > > Yeah, that's what I expected: > > [ Â Â0.724403] AMD-Vi: Â DEV_ALIAS_RANGE Â Â Â Â Â Â Â Â devid: 08:00.0 flags: 00 devid_to: 00:14.4 > [ Â Â0.724439] AMD-Vi: Â DEV_RANGE_END Â Â Â Â Â devid: 08:1f.7 > > That basically says 08:00.0 - 08:1f.7 will show up as 00:14.4 (and > should all go into same iommu domain). > >> I've just figured out a sequence of "echo DEV > PATH" commands to call >> for 14.4 gets me past the "claimed by pci-stub" error and gets me to >> the "failed to assign IRQ" error. >> I'm going to narrow down the required sequence and then post it. > > Kind of afraid to ask, but does it include: > > (assuming 1002 4384 is the pci to pci bridge) > echo 1002 4384 > /sys/bus/pci/drivers/pci-stub/new_id > echo 0000:00:14.4 > /sys/bus/pci/drivers/pci-stub/unbind > > (this has the side effect of detaching the bridge from its domain) > > thanks, > -chris > Exact sequence is: echo "1002 4384" > /sys/bus/pci/drivers/pci-stub/new_id echo "0000:00:14.4" > /sys/bus/pci/devices/0000:00:14.4/driver/unbind I take it this is a bad thing then? > I assume this means that 00:14.4 is still left claimed by pci-stub? Yes > How are you determining this? The lspci paste above has pci-stub for all > of them. The easiest thing might be to start with manually disabling > host driver and reassigning pci-stub to: 00:14.4, 08: 06.2,3 and 0e.0 > Then giving the guest only 08:06.1. I determined it by being half asleep and not reading it properly... >.< You're right, all 5 devices were using pci-stub >> libvirtError: this function is not supported by the connection driver: >> Unable to reset PCI device 0000:00:14.4: no FLR, PM reset or bus reset >> available > Right, libvirt is more restrictive than qemu-kvm (forgot you were using > libvirt here). What does that libvirt error mean? I can't find a definition. Am I limiting myself by using libvirt? Would not using it help and how would I go about not using it? > Trouble now is that > with shared IRQ we don't have a good way to handle that right now. Game over then? I've tried assigning the USB devices before, I couldn't do it because qemu doesn't support USB2 devices. I don't really understand where this IRQ conflict is, the firewire and the USB2 device share IRQ22 but I'm assigning them both to the VM? Is that still a problem? I don't suppose there's any way to change which IRQ they use in the BIOS or with a command is there? I don't know if it means anything but this page: http://linuxtv.org/wiki/index.php/Hauppauge_WinTV-HVR-2200 Has the lspci output for the HVR-2200 which mentions MSI and IRQ255. My knowledge it very limited on this subject so I don't know if that's meaningless looking at the output from another person's lspci. Anything left to try? Regardless, many thanks for your help, James. -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
