[libvirt] [PATCH 06/13] conf: new pci controller model "pcie-root-port"
Laine Stump
laine at laine.org
Mon Jun 22 18:44:11 UTC 2015
This controller can be connected (at domain startup time only - not
hotpluggable) only to a port on the pcie root complex ("pcie-root" in
libvirt config), hence the new connect type
VIR_PCI_CONNECT_TYPE_PCIE_ROOT. It provides a hotpluggable port that
will accept any PCI or PCIe device.
---
docs/formatdomain.html.in | 16 +++++++++--
docs/schemas/domaincommon.rng | 1 +
src/conf/domain_addr.c | 10 +++++--
src/conf/domain_addr.h | 5 +++-
src/conf/domain_conf.c | 3 +-
src/conf/domain_conf.h | 1 +
.../qemuxml2argv-pcie-root-port.xml | 33 ++++++++++++++++++++++
tests/qemuxml2xmltest.c | 1 +
8 files changed, 64 insertions(+), 6 deletions(-)
create mode 100644 tests/qemuxml2argvdata/qemuxml2argv-pcie-root-port.xml
diff --git a/docs/formatdomain.html.in b/docs/formatdomain.html.in
index fb3e2fb..e6c140a 100644
--- a/docs/formatdomain.html.in
+++ b/docs/formatdomain.html.in
@@ -2997,10 +2997,11 @@
<p>
PCI controllers have an optional <code>model</code> attribute with
possible values <code>pci-root</code>, <code>pcie-root</code>,
- <code>pci-bridge</code>, or <code>dmi-to-pci-bridge</code>.
+ <code>pcie-root-port</code>, <code>pci-bridge</code>,
+ or <code>dmi-to-pci-bridge</code>.
(pci-root and pci-bridge <span class="since">since 1.0.5</span>,
pcie-root and dmi-to-pci-bridge <span class="since">since
- 1.1.2</span>)
+ 1.1.2</span>, pcie-root-port <span class="since">since 1.2.17</span>)
The root controllers (<code>pci-root</code> and <code>pcie-root</code>)
have an optional <code>pcihole64</code> element specifying how big
(in kilobytes, or in the unit specified by <code>pcihole64</code>'s
@@ -3054,6 +3055,17 @@
auto-determined by libvirt will be placed on this pci-bridge
device. (<span class="since">since 1.1.2</span>).
</p>
+ <p>
+ Domains with an implicit pcie-root can also add controllers
+ with <code>model='pcie-root-port'</code>. This is a simple type of
+ bridge device that can connect only to one of the 31 slots on
+ the pcie-root bus on its upstream side, and makes a single
+ (PCIe, hotpluggable) port (at slot='0') available on the
+ downstream side. This controller can be used to provide a single
+ slot to later hotplug a PCIe device (but is not itself
+ hotpluggable - it must be in the configuration when the domain
+ is started). (<span class="since">since 1.2.17</span>)
+ </p>
<pre>
...
<devices>
diff --git a/docs/schemas/domaincommon.rng b/docs/schemas/domaincommon.rng
index f0f7400..6139dfb 100644
--- a/docs/schemas/domaincommon.rng
+++ b/docs/schemas/domaincommon.rng
@@ -1751,6 +1751,7 @@
<choice>
<value>pci-bridge</value>
<value>dmi-to-pci-bridge</value>
+ <value>pcie-root-port</value>
</choice>
</attribute>
</group>
diff --git a/src/conf/domain_addr.c b/src/conf/domain_addr.c
index 2be98c5..4b5e81e 100644
--- a/src/conf/domain_addr.c
+++ b/src/conf/domain_addr.c
@@ -183,9 +183,9 @@ virDomainPCIAddressBusSetModel(virDomainPCIAddressBusPtr bus,
case VIR_DOMAIN_CONTROLLER_MODEL_PCIE_ROOT:
/* slots 1 - 31, no hotplug, PCIe only unless the address was
* specified in user config *and* the particular device being
- * attached also allows it
+ * attached also allows it.
*/
- bus->flags = VIR_PCI_CONNECT_TYPE_PCIE;
+ bus->flags = VIR_PCI_CONNECT_TYPE_PCIE | VIR_PCI_CONNECT_TYPE_PCIE_ROOT;
bus->minSlot = 1;
bus->maxSlot = VIR_PCI_ADDRESS_SLOT_LAST;
break;
@@ -196,6 +196,12 @@ virDomainPCIAddressBusSetModel(virDomainPCIAddressBusPtr bus,
bus->minSlot = 1;
bus->maxSlot = VIR_PCI_ADDRESS_SLOT_LAST;
break;
+ case VIR_DOMAIN_CONTROLLER_MODEL_PCIE_ROOT_PORT:
+ /* provides one slot which is pcie and hotpluggable */
+ bus->flags = VIR_PCI_CONNECT_TYPE_PCIE | VIR_PCI_CONNECT_HOTPLUGGABLE;
+ bus->minSlot = 1;
+ bus->maxSlot = 1;
+ break;
default:
virReportError(VIR_ERR_INTERNAL_ERROR,
_("Invalid PCI controller model %d"), model);
diff --git a/src/conf/domain_addr.h b/src/conf/domain_addr.h
index dcfd2e5..2a0ff96 100644
--- a/src/conf/domain_addr.h
+++ b/src/conf/domain_addr.h
@@ -39,6 +39,8 @@ typedef enum {
/* PCI devices can connect to this bus */
VIR_PCI_CONNECT_TYPE_PCIE = 1 << 3,
/* PCI Express devices can connect to this bus */
+ VIR_PCI_CONNECT_TYPE_PCIE_ROOT = 1 << 4,
+ /* for devices that can only connect to pcie-root (i.e. root-port) */
} virDomainPCIConnectFlags;
typedef struct {
@@ -70,7 +72,8 @@ typedef virDomainPCIAddressSet *virDomainPCIAddressSetPtr;
* allowed, e.g. PCI, PCIe, switch
*/
# define VIR_PCI_CONNECT_TYPES_MASK \
- (VIR_PCI_CONNECT_TYPE_PCI | VIR_PCI_CONNECT_TYPE_PCIE)
+ (VIR_PCI_CONNECT_TYPE_PCI | VIR_PCI_CONNECT_TYPE_PCIE | \
+ VIR_PCI_CONNECT_TYPE_PCIE_ROOT)
/* combination of all bits that could be used to connect a normal
* endpoint device (i.e. excluding the connection possible between an
diff --git a/src/conf/domain_conf.c b/src/conf/domain_conf.c
index ca55981..0bdd51e 100644
--- a/src/conf/domain_conf.c
+++ b/src/conf/domain_conf.c
@@ -323,7 +323,8 @@ VIR_ENUM_IMPL(virDomainControllerModelPCI, VIR_DOMAIN_CONTROLLER_MODEL_PCI_LAST,
"pci-root",
"pcie-root",
"pci-bridge",
- "dmi-to-pci-bridge")
+ "dmi-to-pci-bridge",
+ "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 ba17a8d..946210e 100644
--- a/src/conf/domain_conf.h
+++ b/src/conf/domain_conf.h
@@ -752,6 +752,7 @@ typedef enum {
VIR_DOMAIN_CONTROLLER_MODEL_PCIE_ROOT,
VIR_DOMAIN_CONTROLLER_MODEL_PCI_BRIDGE,
VIR_DOMAIN_CONTROLLER_MODEL_DMI_TO_PCI_BRIDGE,
+ VIR_DOMAIN_CONTROLLER_MODEL_PCIE_ROOT_PORT,
VIR_DOMAIN_CONTROLLER_MODEL_PCI_LAST
} virDomainControllerModelPCI;
diff --git a/tests/qemuxml2argvdata/qemuxml2argv-pcie-root-port.xml b/tests/qemuxml2argvdata/qemuxml2argv-pcie-root-port.xml
new file mode 100644
index 0000000..a1fc354
--- /dev/null
+++ b/tests/qemuxml2argvdata/qemuxml2argv-pcie-root-port.xml
@@ -0,0 +1,33 @@
+<domain type='qemu'>
+ <name>q35-test</name>
+ <uuid>11dbdcdd-4c3b-482b-8903-9bdb8c0a2774</uuid>
+ <memory unit='KiB'>2097152</memory>
+ <currentMemory unit='KiB'>2097152</currentMemory>
+ <vcpu placement='static' cpuset='0-1'>2</vcpu>
+ <os>
+ <type arch='x86_64' machine='q35'>hvm</type>
+ <boot dev='hd'/>
+ </os>
+ <clock offset='utc'/>
+ <on_poweroff>destroy</on_poweroff>
+ <on_reboot>restart</on_reboot>
+ <on_crash>destroy</on_crash>
+ <devices>
+ <emulator>/usr/libexec/qemu-kvm</emulator>
+ <disk type='block' device='disk'>
+ <source dev='/dev/HostVG/QEMUGuest1'/>
+ <target dev='sda' bus='sata'/>
+ <address type='drive' controller='0' bus='0' target='0' unit='0'/>
+ </disk>
+ <controller type='pci' index='0' model='pcie-root'/>
+ <controller type='pci' index='1' model='dmi-to-pci-bridge'/>
+ <controller type='pci' index='2' model='pci-bridge'/>
+ <controller type='pci' index='3' model='pcie-root-port'/>
+ <controller type='pci' index='4' model='pcie-root-port'/>
+ <controller type='sata' index='0'/>
+ <video>
+ <model type='qxl' ram='65536' vram='32768' vgamem='8192' heads='1'/>
+ </video>
+ <memballoon model='none'/>
+ </devices>
+</domain>
diff --git a/tests/qemuxml2xmltest.c b/tests/qemuxml2xmltest.c
index 44b388c..2acbae1 100644
--- a/tests/qemuxml2xmltest.c
+++ b/tests/qemuxml2xmltest.c
@@ -566,6 +566,7 @@ mymain(void)
DO_TEST_DIFFERENT("pci-autoadd-idx");
DO_TEST_DIFFERENT("pcie-root");
DO_TEST_DIFFERENT("q35");
+ DO_TEST("pcie-root-port");
DO_TEST("hostdev-scsi-lsi");
DO_TEST("hostdev-scsi-virtio-scsi");
--
2.1.0
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