On 21/11/14 14:39, Juergen Gross wrote: > Hi, > > again a fallout from my "linear p2m list" tests: > > Trying to do PCI-passthrough with a 32-bit pv-domain I passed the > wrong device to the domain. The MMIO address was too large for a > MFN of a 32-bit system (it was 380003200000-3800036fffff). > > Instead of rejecting the operation Xen tried to perform it resulting > in a (quite understandable) failure in the domU. > > I think either the hypervisor or the tools should refuse to do > PCI-passthrough in this case. >
What actually goes wrong? Does the 32bit guest truncate the MMIO region to 44 bits and try to map that? I would completely agree that something (libxl?) should refuse this attempt to do passthrough, but I think pci-front should also kick up a fuss if it is able to detect this error. ~Andrew _______________________________________________ Xen-devel mailing list Xen-devel@lists.xen.org http://lists.xen.org/xen-devel
