[libvirt] [PATCH v2 1/4] qemu: Add support for generic PCIe Root Ports

[Andrea Bolognani]

QEMU 2.9 introduces the pcie-root-port device, which is
a generic version of the existing ioh3420 device.

Make the new device available to libvirt users.
---
 docs/schemas/domaincommon.rng                    |  1 +
 src/conf/domain_conf.c                           |  4 +++-
 src/conf/domain_conf.h                           |  1 +
 src/qemu/qemu_capabilities.c                     |  2 ++
 src/qemu/qemu_capabilities.h                     |  1 +
 src/qemu/qemu_command.c                          | 18 +++++++++++++++---
 tests/qemucapabilitiesdata/caps_2.9.0.x86_64.xml |  1 +
 7 files changed, 24 insertions(+), 4 deletions(-)

diff --git a/docs/schemas/domaincommon.rng b/docs/schemas/domaincommon.rng
index 8be5e08..24d1edb 100644
--- a/docs/schemas/domaincommon.rng
+++ b/docs/schemas/domaincommon.rng
@@ -1904,6 +1904,7 @@
                     <value>i82801b11-bridge</value>
                     <!-- implementations of 'pcie-root-port' -->
                     <value>ioh3420</value>
+                    <value>pcie-root-port</value>
                     <!-- implementations of 'pcie-switch-upstream-port' -->
                     <value>x3130-upstream</value>
                     <!-- implementations of 'pcie-switch-downstream-port' -->
diff --git a/src/conf/domain_conf.c b/src/conf/domain_conf.c
index 11fde50..eaf46b2 100644
--- a/src/conf/domain_conf.c
+++ b/src/conf/domain_conf.c
@@ -338,7 +338,9 @@ VIR_ENUM_IMPL(virDomainControllerPCIModelName,
               "x3130-upstream",
               "xio3130-downstream",
               "pxb",
-              "pxb-pcie")
+              "pxb-pcie",
+              "pcie-root-port",
+);
 
 VIR_ENUM_IMPL(virDomainControllerModelSCSI, VIR_DOMAIN_CONTROLLER_MODEL_SCSI_LAST,
               "auto",
diff --git a/src/conf/domain_conf.h b/src/conf/domain_conf.h
index 826afb4..8e6d874 100644
--- a/src/conf/domain_conf.h
+++ b/src/conf/domain_conf.h
@@ -694,6 +694,7 @@ typedef enum {
     VIR_DOMAIN_CONTROLLER_PCI_MODEL_NAME_XIO3130_DOWNSTREAM,
     VIR_DOMAIN_CONTROLLER_PCI_MODEL_NAME_PXB,
     VIR_DOMAIN_CONTROLLER_PCI_MODEL_NAME_PXB_PCIE,
+    VIR_DOMAIN_CONTROLLER_PCI_MODEL_NAME_PCIE_ROOT_PORT,
 
     VIR_DOMAIN_CONTROLLER_PCI_MODEL_NAME_LAST
 } virDomainControllerPCIModelName;
diff --git a/src/qemu/qemu_capabilities.c b/src/qemu/qemu_capabilities.c
index 5200b39..b85ca71 100644
--- a/src/qemu/qemu_capabilities.c
+++ b/src/qemu/qemu_capabilities.c
@@ -360,6 +360,7 @@ VIR_ENUM_IMPL(virQEMUCaps, QEMU_CAPS_LAST,
               "virtio-net.host_mtu",
               "spice-rendernode",
               "nvdimm",
+              "pcie-root-port",
     );
 
 
@@ -1621,6 +1622,7 @@ struct virQEMUCapsStringFlags virQEMUCapsObjectTypes[] = {
     { "ivshmem-doorbell", QEMU_CAPS_DEVICE_IVSHMEM_DOORBELL },
     { "vhost-scsi", QEMU_CAPS_DEVICE_VHOST_SCSI },
     { "nvdimm", QEMU_CAPS_DEVICE_NVDIMM },
+    { "pcie-root-port", QEMU_CAPS_DEVICE_PCIE_ROOT_PORT },
 };
 
 static struct virQEMUCapsStringFlags virQEMUCapsObjectPropsVirtioBalloon[] = {
diff --git a/src/qemu/qemu_capabilities.h b/src/qemu/qemu_capabilities.h
index 1b4bcfb..ca8a517 100644
--- a/src/qemu/qemu_capabilities.h
+++ b/src/qemu/qemu_capabilities.h
@@ -395,6 +395,7 @@ typedef enum {
     QEMU_CAPS_VIRTIO_NET_HOST_MTU, /* virtio-net-*.host_mtu */
     QEMU_CAPS_SPICE_RENDERNODE, /* -spice rendernode */
     QEMU_CAPS_DEVICE_NVDIMM, /* -device nvdimm */
+    QEMU_CAPS_DEVICE_PCIE_ROOT_PORT, /* -device pcie-root-port */
 
     QEMU_CAPS_LAST /* this must always be the last item */
 } virQEMUCapsFlags;
diff --git a/src/qemu/qemu_command.c b/src/qemu/qemu_command.c
index 61d9eb9..878d088 100644
--- a/src/qemu/qemu_command.c
+++ b/src/qemu/qemu_command.c
@@ -2874,20 +2874,32 @@ qemuBuildControllerDevStr(const virDomainDef *domainDef,
                                def->opts.pciopts.modelName);
                 goto error;
             }
-            if (def->opts.pciopts.modelName
-                != VIR_DOMAIN_CONTROLLER_PCI_MODEL_NAME_IOH3420) {
+            if ((def->opts.pciopts.modelName !=
+                 VIR_DOMAIN_CONTROLLER_PCI_MODEL_NAME_IOH3420) &&
+                (def->opts.pciopts.modelName !=
+                 VIR_DOMAIN_CONTROLLER_PCI_MODEL_NAME_PCIE_ROOT_PORT)) {
                 virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
                                _("PCI controller model name '%s' "
                                  "is not valid for a pcie-root-port"),
                                modelName);
                 goto error;
             }
-            if (!virQEMUCapsGet(qemuCaps, QEMU_CAPS_DEVICE_IOH3420)) {
+            if ((def->opts.pciopts.modelName ==
+                 VIR_DOMAIN_CONTROLLER_PCI_MODEL_NAME_IOH3420) &&
+                !virQEMUCapsGet(qemuCaps, QEMU_CAPS_DEVICE_IOH3420)) {
                 virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
                                _("the pcie-root-port (ioh3420) "
                                  "controller is not supported in this QEMU binary"));
                 goto error;
             }
+            if ((def->opts.pciopts.modelName ==
+                 VIR_DOMAIN_CONTROLLER_PCI_MODEL_NAME_PCIE_ROOT_PORT) &&
+                !virQEMUCapsGet(qemuCaps, QEMU_CAPS_DEVICE_PCIE_ROOT_PORT)) {
+                virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
+                               _("the pcie-root-port (pcie-root-port) "
+                                 "controller is not supported in this QEMU binary"));
+                goto error;
+            }
 
             virBufferAsprintf(&buf, "%s,port=0x%x,chassis=%d,id=%s",
                               modelName, def->opts.pciopts.port,
diff --git a/tests/qemucapabilitiesdata/caps_2.9.0.x86_64.xml b/tests/qemucapabilitiesdata/caps_2.9.0.x86_64.xml
index 334f8e7..a397615 100644
--- a/tests/qemucapabilitiesdata/caps_2.9.0.x86_64.xml
+++ b/tests/qemucapabilitiesdata/caps_2.9.0.x86_64.xml
@@ -202,6 +202,7 @@
   <flag name='drive-iotune-group'/>
   <flag name='query-cpu-model-expansion'/>
   <flag name='virtio-net.host_mtu'/>
+  <flag name='pcie-root-port'/>
   <version>2008050</version>
   <kvmVersion>0</kvmVersion>
   <package> (v2.8.0-1961-g5b10b94bd5)</package>
-- 
2.7.4