On Thu, Feb 14, 2013 at 08:23:04PM +0200, Avi Kivity wrote: > On Thu, Feb 14, 2013 at 8:12 PM, Michael S. Tsirkin <m...@redhat.com> wrote: > >> > >> Is there an actual real problem that needs fixing? > > > > Yes. Guests sometimes cause device BARs to temporary overlap > > the APIC range during BAR sizing. It works fine on a physical > > system but fails on KVM since pci has same priority. > > > > See the report: > > [BUG] Guest OS hangs on boot when 64bit BAR present > > > > Is PCI_COMMAND_MEMORY set while this is going on?
I think Linux never clears PCI_COMMAND_MEMORY because it's buggy in some devices.
