[libvirt] CAP_SYS_RAWIO missing for qemu-kvm device passthrough

Hi, I'm running current git libvirt on Fedora 13 beta. I enabled the use of libcap-ng as it is done in the regular F13 .spec. When I now pass a pci card through to a qemu-kvm guest using vt-d I get this error from qemu-kvm: Failed to assign irq for "hostdev0": Operation not permitted Perhaps you are assigning a device that shares an IRQ with another device? I'm running qemu-kvm as root. But that doesn't seem to be enough: I traced the issue down to a missing CAP_SYS_RAWIO.The kvm kernel module requires CAP_SYS_RAWIO to use the KVM_ASSIGN_DEV_IRQ ioctl. When I remove the capability-dropping from libvirt like this everything works as expected: --- libvirt/src/qemu/qemu_driver.c 2010-05-13 22:50:13.000000000 +0200 +++ libvirt.new/src/qemu/qemu_driver.c 2010-05-13 23:18:49.286311290 +0200 @@ -3359,7 +3359,7 @@ ret = virExecDaemonize(argv, progenv, &keepfd, &child, stdin_fd, &logfile, &logfile, - VIR_EXEC_NONBLOCK | VIR_EXEC_CLEAR_CAPS, + VIR_EXEC_NONBLOCK, qemudSecurityHook, &hookData, pidfile); VIR_FREE(pidfile); Is there a better solution to get device passthrough to work? Kind regards, Gerd