10:44 a.m.
The code is entirely correct, but it still managed to trip me
up when I first ran into it because I did not realize right away
that VIR_PCI_CONNECT_TYPES_ENDPOINT was not a single flag, but
rather a mask including both VIR_PCI_CONNECT_TYPE_PCI_DEVICE and
VIR_PCI_CONNECT_TYPE_PCIE_DEVICE.
In order to save the next distracted traveler in PCI Address Land
some time, document this fact with a comment. Add a test case for
the behavior as well.
---
src/conf/domain_addr.c | 4 +-
.../qemuxml2argv-q35-pci-force-address.args | 25 +++++++++++
.../qemuxml2argv-q35-pci-force-address.xml | 32 +++++++++++++++
tests/qemuxml2argvtest.c | 7 ++++
.../qemuxml2xmlout-q35-pci-force-address.xml | 48 ++++++++++++++++++++++
tests/qemuxml2xmltest.c | 7 ++++
6 files changed, 122 insertions(+), 1 deletion(-)
create mode 100644 tests/qemuxml2argvdata/qemuxml2argv-q35-pci-force-address.args
create mode 100644 tests/qemuxml2argvdata/qemuxml2argv-q35-pci-force-address.xml
create mode 100644 tests/qemuxml2xmloutdata/qemuxml2xmlout-q35-pci-force-address.xml
diff --git a/src/conf/domain_addr.c b/src/conf/domain_addr.c
index 0406b50..bbeb611 100644
--- a/src/conf/domain_addr.c
+++ b/src/conf/domain_addr.c
@@ -100,7 +100,9 @@ virDomainPCIAddressFlagsCompatible(virPCIDeviceAddressPtr addr,
if (fromConfig) {
/* If the requested connection was manually specified in
* config, allow a PCI device to connect to a PCIe slot, or
- * vice versa.
+ * vice versa. In order to do so, we add *both* the PCI_DEVICE
+ * and the PCIE_DEVICE flags to the bus if it already has either
+ * of them, using the ENDPOINT mask.
*/
if (busFlags & VIR_PCI_CONNECT_TYPES_ENDPOINT)
busFlags |= VIR_PCI_CONNECT_TYPES_ENDPOINT;
diff --git a/tests/qemuxml2argvdata/qemuxml2argv-q35-pci-force-address.args
b/tests/qemuxml2argvdata/qemuxml2argv-q35-pci-force-address.args
new file mode 100644
index 0000000..9ca342b
--- /dev/null
+++ b/tests/qemuxml2argvdata/qemuxml2argv-q35-pci-force-address.args
@@ -0,0 +1,25 @@
+LC_ALL=C \
+PATH=/bin \
+HOME=/home/test \
+USER=test \
+LOGNAME=test \
+QEMU_AUDIO_DRV=none \
+/usr/libexec/qemu-kvm \
+-name q35-test \
+-S \
+-M q35 \
+-m 2048 \
+-smp 2,sockets=2,cores=1,threads=1 \
+-uuid 11dbdcdd-4c3b-482b-8903-9bdb8c0a2774 \
+-nographic \
+-nodefaults \
+-monitor unix:/tmp/lib/domain--1-q35-test/monitor.sock,server,nowait \
+-no-acpi \
+-boot c \
+-device i82801b11-bridge,id=pci.1,bus=pcie.0,addr=0x1e \
+-device pci-bridge,chassis_nr=2,id=pci.2,bus=pci.1,addr=0x0 \
+-device ioh3420,port=0x10,chassis=3,id=pci.3,bus=pcie.0,addr=0x2 \
+-device e1000e,vlan=0,id=net0,mac=52:54:00:aa:bf:ef,bus=pci.2,addr=0x1 \
+-net user,vlan=0,name=hostnet0 \
+-device intel-hda,id=sound0,bus=pci.3,addr=0x0 \
+-device hda-duplex,id=sound0-codec0,bus=sound0.0,cad=0
diff --git a/tests/qemuxml2argvdata/qemuxml2argv-q35-pci-force-address.xml
b/tests/qemuxml2argvdata/qemuxml2argv-q35-pci-force-address.xml
new file mode 100644
index 0000000..34ec7c7
--- /dev/null
+++ b/tests/qemuxml2argvdata/qemuxml2argv-q35-pci-force-address.xml
@@ -0,0 +1,32 @@
+<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>
+ <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'/>
+ <sound model='ich6'>
+ <address type='pci' domain='0x0000' bus='0x03'
slot='0x00' function='0x0'/>
+ </sound>
+ <interface type='user'>
+ <model type='e1000e'/>
+ <mac address='52:54:00:aa:bf:ef'/>
+ <address type='pci' domain='0x0000' bus='0x02'
slot='0x01' function='0x0'/>
+ </interface>
+ <controller type='usb' model='none'/>
+ <memballoon model='none'/>
+ </devices>
+</domain>
diff --git a/tests/qemuxml2argvtest.c b/tests/qemuxml2argvtest.c
index b996182..fc18317 100644
--- a/tests/qemuxml2argvtest.c
+++ b/tests/qemuxml2argvtest.c
@@ -1749,6 +1749,13 @@ mymain(void)
QEMU_CAPS_ICH9_AHCI,
QEMU_CAPS_PCI_MULTIFUNCTION, QEMU_CAPS_ICH9_USB_EHCI1,
QEMU_CAPS_NEC_USB_XHCI);
+ /* Make sure the user can always override libvirt's default device
+ * placement policy by providing an explicit PCI address */
+ DO_TEST("q35-pci-force-address",
+ QEMU_CAPS_DEVICE_PCI_BRIDGE,
+ QEMU_CAPS_DEVICE_DMI_TO_PCI_BRIDGE,
+ QEMU_CAPS_DEVICE_IOH3420,
+ QEMU_CAPS_HDA_DUPLEX);
DO_TEST_PARSE_ERROR("q35-wrong-root",
QEMU_CAPS_DEVICE_PCI_BRIDGE,
diff --git a/tests/qemuxml2xmloutdata/qemuxml2xmlout-q35-pci-force-address.xml
b/tests/qemuxml2xmloutdata/qemuxml2xmlout-q35-pci-force-address.xml
new file mode 100644
index 0000000..c0332d4
--- /dev/null
+++ b/tests/qemuxml2xmloutdata/qemuxml2xmlout-q35-pci-force-address.xml
@@ -0,0 +1,48 @@
+<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>
+ <controller type='pci' index='0' model='pcie-root'/>
+ <controller type='pci' index='1'
model='dmi-to-pci-bridge'>
+ <model name='i82801b11-bridge'/>
+ <address type='pci' domain='0x0000' bus='0x00'
slot='0x1e' function='0x0'/>
+ </controller>
+ <controller type='pci' index='2' model='pci-bridge'>
+ <model name='pci-bridge'/>
+ <target chassisNr='2'/>
+ <address type='pci' domain='0x0000' bus='0x01'
slot='0x00' function='0x0'/>
+ </controller>
+ <controller type='pci' index='3'
model='pcie-root-port'>
+ <model name='ioh3420'/>
+ <target chassis='3' port='0x10'/>
+ <address type='pci' domain='0x0000' bus='0x00'
slot='0x02' function='0x0'/>
+ </controller>
+ <controller type='usb' index='0' model='none'/>
+ <controller type='sata' index='0'>
+ <address type='pci' domain='0x0000' bus='0x00'
slot='0x1f' function='0x2'/>
+ </controller>
+ <interface type='user'>
+ <mac address='52:54:00:aa:bf:ef'/>
+ <model type='e1000e'/>
+ <address type='pci' domain='0x0000' bus='0x02'
slot='0x01' function='0x0'/>
+ </interface>
+ <input type='mouse' bus='ps2'/>
+ <input type='keyboard' bus='ps2'/>
+ <sound model='ich6'>
+ <address type='pci' domain='0x0000' bus='0x03'
slot='0x00' function='0x0'/>
+ </sound>
+ <memballoon model='none'/>
+ </devices>
+</domain>
diff --git a/tests/qemuxml2xmltest.c b/tests/qemuxml2xmltest.c
index 62bff8c..95c0bf2 100644
--- a/tests/qemuxml2xmltest.c
+++ b/tests/qemuxml2xmltest.c
@@ -727,6 +727,13 @@ mymain(void)
QEMU_CAPS_DEVICE_XIO3130_DOWNSTREAM, QEMU_CAPS_ICH9_AHCI,
QEMU_CAPS_PCI_MULTIFUNCTION, QEMU_CAPS_ICH9_USB_EHCI1,
QEMU_CAPS_NEC_USB_XHCI);
+ /* Make sure the user can always override libvirt's default device
+ * placement policy by providing an explicit PCI address */
+ DO_TEST("q35-pci-force-address",
+ QEMU_CAPS_DEVICE_PCI_BRIDGE,
+ QEMU_CAPS_DEVICE_DMI_TO_PCI_BRIDGE,
+ QEMU_CAPS_DEVICE_IOH3420,
+ QEMU_CAPS_HDA_DUPLEX);
DO_TEST("hostdev-scsi-lsi",
QEMU_CAPS_VIRTIO_SCSI, QEMU_CAPS_SCSI_LSI,
--
2.7.4