stubdom: PCI passthrough support via PV-PCI

Signed-off-by: Samuel Thibault <samuel.thibault@eu.citrix.com>

tools/ioemu/Makefile.target

@@ -358,7 +358,7 @@ VL_OBJS+=tap-win32.o
 endif
 
 ifdef CONFIG_STUBDOM
-#CONFIG_PASSTHROUGH=1
+CONFIG_PASSTHROUGH=1
 else
   ifeq (,$(wildcard /usr/include/pci))
 $(warning *** pciutils-devl package not found - missing /usr/include/pci)

tools/ioemu/hw/pass-through.c

@@ -515,6 +515,7 @@ struct pt_dev * register_real_device(PCIBus *e_bus,
         PT_LOG("Error: couldn't locate device in libpci structures\n");
         return NULL;
     }
+    pci_fill_info(pci_dev, PCI_FILL_IRQ | PCI_FILL_BASES | PCI_FILL_ROM_BASE | PCI_FILL_SIZES);
 
     if ( e_devfn == PT_VIRT_DEVFN_AUTO ) {
         /*indicate a static assignment(not hotplug), so find a free PCI hot plug slot */

tools/ioemu/xenstore.c

@@ -320,7 +320,7 @@ void xenstore_parse_domain_config(int hvm_domid)
 
     /* get the pci pass-through parameter */
     if (pasprintf(&buf, "/local/domain/0/backend/pci/%u/%u/num_devs",
-                  domid, pci_devid) == -1)
+                  hvm_domid, pci_devid) == -1)
         goto out;
 
     free(params);
@@ -331,7 +331,7 @@ void xenstore_parse_domain_config(int hvm_domid)
 
     for ( i = 0; i < num; i++ ) {
         if (pasprintf(&buf, "/local/domain/0/backend/pci/%u/%u/dev-%d",
-                    domid, pci_devid, i) != -1) {
+                    hvm_domid, pci_devid, i) != -1) {
             free(dev);
             dev = xs_read(xsh, XBT_NULL, buf, &len);