tree 971c4a48a90fc03a1ae3b3c743fd59d8bbbc1907
parent 778d1799397e1353b69f16547d359f944fb49ea6
author Michael S. Tsirkin <mst@redhat.com> 1315144255 +0300
committer Michael S. Tsirkin <mst@redhat.com> 1316456550 +0300

pci: implement bridge filtering

Support bridge filtering on top of the memory
API as suggested by Avi Kivity:

Create a memory region for the bridge's address space.  This region is
not directly added to system_memory or its descendants.  Devices under
the bridge see this region as its pci_address_space().  The region is
as large as the entire address space - it does not take into account
any windows.

For each of the three windows (pref, non-pref, vga), create an alias
with the appropriate start and size.  Map the alias into the bridge's
parent's pci_address_space(), as subregions.

Signed-off-by: Michael S. Tsirkin <mst@redhat.com>