On 29.03.2010, at 19:23, Kenni Lund wrote: >>> 2010/1/9 Alexander Graf <agraf@xxxxxxx>: >>>> >>>> On 09.01.2010, at 03:45, Ryan C. Underwood wrote: >>>> >>>>> >>>>> I have a multifunction PCI device that I'd like to pass through to KVM. >>>>> In order to do that, I'm reading that the PCI memory region must be >>>>> 4K-page >>>>> aligned and the PCI memory resources itself must also be exact multiples >>>>> of 4K pages. >>>>> >>>>> I have added the following on my kernel command line: >>>>> reassign_resources reassigndev=08:09.0,08:09.1,08:09.2,08:09.3,08:09.4 >>>>> >>>>> But I don't know if it has any effect. The resources are still not >>>>> sized in 4K pages. Also, this seems to screw up the last device. >>>> >>>> I submitted a patch to qemu-kvm recently that got rid of that limitation. >>>> Please try out if the current git head works for you. >>>> >>>> Alex-- >>> >>> I just upgraded to kernel 2.6.32.10 with qemu-kvm 0.12.3 and I still >>> get the following error when trying to pass through a dedicated PCI >>> USB card: >>> >>> "Unable to assign device: PCI region 0 at address 0xe9403000 has size >>> 0x100, which is not a multiple of 4K >>> Error initializing device pci-assign" >>> >>> Didn't the above patch make it into qemu-kvm? I don't know why, but I >>> was under the impression that this was fixed when I upgraded to >>> qemu-kvm 0.12.3. >>> >> It's only in qemu-kvm.git. Maybe it should go into qemu-kvm-0.12.4 if there >> is one > > That would be highly appriciated...with the current USB support in > QEMU, PCI passthrough is the only way to get USB 2.0 support. I've > bought two dedicated PCI USB cards for this, but none of them works > due to the above limitation. > > Perhaps a developer can comment on this? Are there any plans on > including this patch in the stable releases in the near future? Please first try out to build the current git snapshot of qemu-kvm. If it works properly for you then I agree that we should take this into 0.12-stable. I wrote the support for a card that still didn't work even with this patch. So having someone say it makes things work for him is definitely a must :-). Alex-- 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
