[libvirt] [PATCH v14 48/49] add hostdev pci backend type for xen

[Chunyan Liu]

Add VIR_DOMAIN_HOSTDEV_PCI_BACKEND_XEN. For legacy xen, it will use "pciback" as
stub driver.

Signed-off-by: Chunyan Liu <cyliu at suse.com>
---
 docs/schemas/domaincommon.rng |  1 +
 src/conf/domain_conf.c        |  3 ++-
 src/conf/domain_conf.h        |  1 +
 src/libxl/libxl_domain.c      |  9 +++++++++
 src/qemu/qemu_command.c       |  3 +--
 src/qemu/qemu_hostdev.c       |  1 +
 src/qemu/qemu_hotplug.c       |  4 +---
 src/util/virhostdev.c         | 10 ++++++++++
 8 files changed, 26 insertions(+), 6 deletions(-)

diff --git a/docs/schemas/domaincommon.rng b/docs/schemas/domaincommon.rng
index 601e7ac..bcd8142 100644
--- a/docs/schemas/domaincommon.rng
+++ b/docs/schemas/domaincommon.rng
@@ -3421,6 +3421,7 @@
             <choice>
               <value>kvm</value>
               <value>vfio</value>
+              <value>xen</value>
             </choice>
           </attribute>
           <empty/>
diff --git a/src/conf/domain_conf.c b/src/conf/domain_conf.c
index 1d5cc14..6d778a5 100644
--- a/src/conf/domain_conf.c
+++ b/src/conf/domain_conf.c
@@ -627,7 +627,8 @@ VIR_ENUM_IMPL(virDomainHostdevSubsysPciBackend,
               VIR_DOMAIN_HOSTDEV_PCI_BACKEND_TYPE_LAST,
               "default",
               "kvm",
-              "vfio")
+              "vfio",
+              "xen")
 
 VIR_ENUM_IMPL(virDomainHostdevCaps, VIR_DOMAIN_HOSTDEV_CAPS_TYPE_LAST,
               "storage",
diff --git a/src/conf/domain_conf.h b/src/conf/domain_conf.h
index 2467f65..2840539 100644
--- a/src/conf/domain_conf.h
+++ b/src/conf/domain_conf.h
@@ -415,6 +415,7 @@ typedef enum {
     VIR_DOMAIN_HOSTDEV_PCI_BACKEND_DEFAULT, /* detect automaticaly, prefer VFIO */
     VIR_DOMAIN_HOSTDEV_PCI_BACKEND_KVM,    /* force legacy kvm style */
     VIR_DOMAIN_HOSTDEV_PCI_BACKEND_VFIO,   /* force vfio */
+    VIR_DOMAIN_HOSTDEV_PCI_BACKEND_XEN,    /* force legacy xen style, use pciback */
 
     VIR_DOMAIN_HOSTDEV_PCI_BACKEND_TYPE_LAST
 } virDomainHostdevSubsysPciBackendType;
diff --git a/src/libxl/libxl_domain.c b/src/libxl/libxl_domain.c
index fdc4661..274fb6c 100644
--- a/src/libxl/libxl_domain.c
+++ b/src/libxl/libxl_domain.c
@@ -478,6 +478,15 @@ libxlDomainDeviceDefPostParse(virDomainDeviceDefPtr dev,
         STRNEQ(def->os.type, "hvm"))
         dev->data.chr->targetType = VIR_DOMAIN_CHR_CONSOLE_TARGET_TYPE_XEN;
 
+    if (dev->type == VIR_DOMAIN_DEVICE_HOSTDEV) {
+        virDomainHostdevDefPtr hostdev = dev->data.hostdev;
+
+        if (hostdev->mode == VIR_DOMAIN_HOSTDEV_MODE_SUBSYS &&
+            hostdev->source.subsys.type == VIR_DOMAIN_HOSTDEV_SUBSYS_TYPE_PCI &&
+            hostdev->source.subsys.u.pci.backend == VIR_DOMAIN_HOSTDEV_PCI_BACKEND_DEFAULT)
+            hostdev->source.subsys.u.pci.backend = VIR_DOMAIN_HOSTDEV_PCI_BACKEND_XEN;
+    }
+
     return 0;
 }
 
diff --git a/src/qemu/qemu_command.c b/src/qemu/qemu_command.c
index 611d21d..0c3a024 100644
--- a/src/qemu/qemu_command.c
+++ b/src/qemu/qemu_command.c
@@ -5547,8 +5547,7 @@ qemuBuildPCIHostdevDevStr(virDomainDefPtr def,
         virBufferAddLit(&buf, "vfio-pci");
         break;
 
-    case VIR_DOMAIN_HOSTDEV_PCI_BACKEND_DEFAULT:
-    case VIR_DOMAIN_HOSTDEV_PCI_BACKEND_TYPE_LAST:
+    default:
         virReportError(VIR_ERR_INTERNAL_ERROR,
                        _("invalid PCI passthrough type '%s'"),
                        virDomainHostdevSubsysPciBackendTypeToString(backend));
diff --git a/src/qemu/qemu_hostdev.c b/src/qemu/qemu_hostdev.c
index 88907b1..f966ca2 100644
--- a/src/qemu/qemu_hostdev.c
+++ b/src/qemu/qemu_hostdev.c
@@ -205,6 +205,7 @@ qemuPrepareHostdevPCICheckSupport(virDomainHostdevDefPtr *hostdevs,
 
             break;
 
+        case VIR_DOMAIN_HOSTDEV_PCI_BACKEND_XEN:
         case VIR_DOMAIN_HOSTDEV_PCI_BACKEND_TYPE_LAST:
             break;
         }
diff --git a/src/qemu/qemu_hotplug.c b/src/qemu/qemu_hotplug.c
index 420cb28..216727c 100644
--- a/src/qemu/qemu_hotplug.c
+++ b/src/qemu/qemu_hotplug.c
@@ -1192,9 +1192,7 @@ qemuDomainAttachHostPciDevice(virQEMUDriverPtr driver,
         virProcessSetMaxMemLock(vm->pid, memKB * 1024);
         break;
 
-    case VIR_DOMAIN_HOSTDEV_PCI_BACKEND_DEFAULT:
-    case VIR_DOMAIN_HOSTDEV_PCI_BACKEND_KVM:
-    case VIR_DOMAIN_HOSTDEV_PCI_BACKEND_TYPE_LAST:
+    default:
         break;
     }
 
diff --git a/src/util/virhostdev.c b/src/util/virhostdev.c
index 5f61bfc..c112f95 100644
--- a/src/util/virhostdev.c
+++ b/src/util/virhostdev.c
@@ -173,6 +173,12 @@ virHostdevGetPciHostDeviceList(virDomainHostdevDefPtr *hostdevs, int nhostdevs)
                 virObjectUnref(list);
                 return NULL;
             }
+        } else if (hostdev->source.subsys.u.pci.backend
+                   == VIR_DOMAIN_HOSTDEV_PCI_BACKEND_XEN) {
+            if (virPCIDeviceSetStubDriver(dev, "pciback") < 0) {
+                virObjectUnref(list);
+                return NULL;
+            }
         } else {
             if (virPCIDeviceSetStubDriver(dev, "pci-stub") < 0) {
                 virObjectUnref(list);
@@ -828,6 +834,10 @@ virHostdevUpdateActivePciHostdevs(virHostdevManagerPtr mgr,
             == VIR_DOMAIN_HOSTDEV_PCI_BACKEND_VFIO) {
             if (virPCIDeviceSetStubDriver(dev, "vfio-pci") < 0)
                 goto cleanup;
+        } else if (hostdev->source.subsys.u.pci.backend
+                   == VIR_DOMAIN_HOSTDEV_PCI_BACKEND_XEN) {
+            if (virPCIDeviceSetStubDriver(dev, "pciback") < 0)
+                goto cleanup;
         } else {
             if (virPCIDeviceSetStubDriver(dev, "pci-stub") < 0)
                 goto cleanup;
-- 
1.9.0