[libvirt] CAP_SYS_RAWIO missing for qemu-kvm device passthrough

[Gerd v. Egidy]

Hi Chris,

> > 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.
> 
> There is some pending work in KVM to deal with this.  It simply removes
> CAP_SYS_RAWIO.  Need to finish auditing this.  

Thanks for confirming the issue.

> Dropping all but
> CAP_SYS_RAWIO in libvirt isn't a good final solution since it
> drastically undermines the value of dropping privileges.

Wouldn't it make sense to do just that as a temporary solution until the real 
fix is finished?

Without a fix for this issue, Fedora 13 will, when released, not be able to do 
pci device passthrough or SR-IOV. This is a regression from F12, where SR-IOV 
was one of the key features (like device passthrough was in F11).

Kind regards,

Gerd