tests: Test generic PCIe Root Ports

We want pcie-root-ports to be used when available in QEMU,
but at the same time we need to ensure that hosts running
older QEMU releases keep working and that the user can
override the default at any time.

Add a comment for the original pcie-root-port test cases
to make it clear how these new test cases are different.

tests/qemuxml2argvdata/qemuxml2argv-pcie-root-port-model-generic.args

+LC_ALL=C \
+PATH=/bin \
+HOME=/home/test \
+USER=test \
+LOGNAME=test \
+QEMU_AUDIO_DRV=none \
+/usr/bin/qemu-system-x86_64 \
+-name guest \
+-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-guest/monitor.sock,server,nowait \
+-no-acpi \
+-boot c \
+-device pcie-root-port,port=0x10,chassis=1,id=pci.1,bus=pcie.0,\
+multifunction=on,addr=0x2 \
+-device pcie-root-port,port=0x11,chassis=2,id=pci.2,bus=pcie.0,addr=0x2.0x1 \
+-device ioh3420,port=0x12,chassis=3,id=pci.3,bus=pcie.0,addr=0x2.0x2

tests/qemuxml2argvdata/qemuxml2argv-pcie-root-port-model-generic.xml

+<domain type='qemu'>
+  <name>guest</name>
+  <uuid>11dbdcdd-4c3b-482b-8903-9bdb8c0a2774</uuid>
+  <memory unit='KiB'>2097152</memory>
+  <currentMemory unit='KiB'>2097152</currentMemory>
+  <vcpu placement='static'>2</vcpu>
+  <os>
+    <type arch='x86_64' machine='q35'>hvm</type>
+  </os>
+  <devices>
+    <emulator>/usr/bin/qemu-system-x86_64</emulator>
+    <controller type='pci' index='0' model='pcie-root'/>
+    <controller type='pci' index='1' model='pcie-root-port'/>
+    <controller type='pci' index='2' model='pcie-root-port'>
+      <model name='pcie-root-port'/>
+    </controller>
+    <controller type='pci' index='3' model='pcie-root-port'>
+      <model name='ioh3420'/>
+    </controller>
+    <memballoon model='none'/>
+  </devices>
+</domain>

tests/qemuxml2argvdata/qemuxml2argv-pcie-root-port-model-ioh3420.args

+LC_ALL=C \
+PATH=/bin \
+HOME=/home/test \
+USER=test \
+LOGNAME=test \
+QEMU_AUDIO_DRV=none \
+/usr/bin/qemu-system-x86_64 \
+-name guest \
+-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-guest/monitor.sock,server,nowait \
+-no-acpi \
+-boot c \
+-device ioh3420,port=0x10,chassis=1,id=pci.1,bus=pcie.0,multifunction=on,\
+addr=0x2 \
+-device ioh3420,port=0x11,chassis=2,id=pci.2,bus=pcie.0,addr=0x2.0x1

tests/qemuxml2argvdata/qemuxml2argv-pcie-root-port-model-ioh3420.xml

+<domain type='qemu'>
+  <name>guest</name>
+  <uuid>11dbdcdd-4c3b-482b-8903-9bdb8c0a2774</uuid>
+  <memory unit='KiB'>2097152</memory>
+  <currentMemory unit='KiB'>2097152</currentMemory>
+  <vcpu placement='static'>2</vcpu>
+  <os>
+    <type arch='x86_64' machine='q35'>hvm</type>
+  </os>
+  <devices>
+    <emulator>/usr/bin/qemu-system-x86_64</emulator>
+    <controller type='pci' index='0' model='pcie-root'/>
+    <controller type='pci' index='1' model='pcie-root-port'/>
+    <controller type='pci' index='2' model='pcie-root-port'>
+      <model name='ioh3420'/>
+    </controller>
+    <memballoon model='none'/>
+  </devices>
+</domain>

tests/qemuxml2argvtest.c

@@ -2011,12 +2011,26 @@ mymain(void)
             QEMU_CAPS_DEVICE_QXL,
             QEMU_CAPS_HDA_DUPLEX,
             QEMU_CAPS_USB_REDIR);
+
+    /* Test automatic and manual setting of pcie-root-port attributes */
     DO_TEST("pcie-root-port",
             QEMU_CAPS_DEVICE_IOH3420,
             QEMU_CAPS_ICH9_AHCI,
             QEMU_CAPS_PCI_MULTIFUNCTION,
             QEMU_CAPS_DEVICE_VIDEO_PRIMARY,
             QEMU_CAPS_DEVICE_QXL);
+
+    /* Make sure the default model for PCIe Root Ports is picked correctly
+     * based on QEMU binary capabilities. We use x86/q35 for the test, but
+     * any PCIe machine type (such as aarch64/virt) will behave the same */
+    DO_TEST("pcie-root-port-model-generic",
+            QEMU_CAPS_DEVICE_PCIE_ROOT_PORT,
+            QEMU_CAPS_DEVICE_IOH3420,
+            QEMU_CAPS_PCI_MULTIFUNCTION);
+    DO_TEST("pcie-root-port-model-ioh3420",
+            QEMU_CAPS_DEVICE_IOH3420,
+            QEMU_CAPS_PCI_MULTIFUNCTION);
+
     DO_TEST("autoindex",
             QEMU_CAPS_DEVICE_PCI_BRIDGE,
             QEMU_CAPS_DEVICE_DMI_TO_PCI_BRIDGE,

tests/qemuxml2xmloutdata/qemuxml2xmlout-pcie-root-port-model-generic.xml

+<domain type='qemu'>
+  <name>guest</name>
+  <uuid>11dbdcdd-4c3b-482b-8903-9bdb8c0a2774</uuid>
+  <memory unit='KiB'>2097152</memory>
+  <currentMemory unit='KiB'>2097152</currentMemory>
+  <vcpu placement='static'>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/bin/qemu-system-x86_64</emulator>
+    <controller type='pci' index='0' model='pcie-root'/>
+    <controller type='pci' index='1' model='pcie-root-port'>
+      <model name='pcie-root-port'/>
+      <target chassis='1' port='0x10'/>
+      <address type='pci' domain='0x0000' bus='0x00' slot='0x02' function='0x0' multifunction='on'/>
+    </controller>
+    <controller type='pci' index='2' model='pcie-root-port'>
+      <model name='pcie-root-port'/>
+      <target chassis='2' port='0x11'/>
+      <address type='pci' domain='0x0000' bus='0x00' slot='0x02' function='0x1'/>
+    </controller>
+    <controller type='pci' index='3' model='pcie-root-port'>
+      <model name='ioh3420'/>
+      <target chassis='3' port='0x12'/>
+      <address type='pci' domain='0x0000' bus='0x00' slot='0x02' function='0x2'/>
+    </controller>
+    <controller type='sata' index='0'>
+      <address type='pci' domain='0x0000' bus='0x00' slot='0x1f' function='0x2'/>
+    </controller>
+    <input type='mouse' bus='ps2'/>
+    <input type='keyboard' bus='ps2'/>
+    <memballoon model='none'/>
+  </devices>
+</domain>

tests/qemuxml2xmloutdata/qemuxml2xmlout-pcie-root-port-model-ioh3420.xml

+<domain type='qemu'>
+  <name>guest</name>
+  <uuid>11dbdcdd-4c3b-482b-8903-9bdb8c0a2774</uuid>
+  <memory unit='KiB'>2097152</memory>
+  <currentMemory unit='KiB'>2097152</currentMemory>
+  <vcpu placement='static'>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/bin/qemu-system-x86_64</emulator>
+    <controller type='pci' index='0' model='pcie-root'/>
+    <controller type='pci' index='1' model='pcie-root-port'>
+      <model name='ioh3420'/>
+      <target chassis='1' port='0x10'/>
+      <address type='pci' domain='0x0000' bus='0x00' slot='0x02' function='0x0' multifunction='on'/>
+    </controller>
+    <controller type='pci' index='2' model='pcie-root-port'>
+      <model name='ioh3420'/>
+      <target chassis='2' port='0x11'/>
+      <address type='pci' domain='0x0000' bus='0x00' slot='0x02' function='0x1'/>
+    </controller>
+    <controller type='sata' index='0'>
+      <address type='pci' domain='0x0000' bus='0x00' slot='0x1f' function='0x2'/>
+    </controller>
+    <input type='mouse' bus='ps2'/>
+    <input type='keyboard' bus='ps2'/>
+    <memballoon model='none'/>
+  </devices>
+</domain>

tests/qemuxml2xmltest.c

@@ -884,12 +884,26 @@ mymain(void)
             QEMU_CAPS_ICH9_AHCI,
             QEMU_CAPS_DEVICE_VIDEO_PRIMARY,
             QEMU_CAPS_DEVICE_QXL);
+
+    /* Test automatic and manual setting of pcie-root-port attributes */
     DO_TEST("pcie-root-port",
             QEMU_CAPS_DEVICE_IOH3420,
             QEMU_CAPS_ICH9_AHCI,
             QEMU_CAPS_PCI_MULTIFUNCTION,
             QEMU_CAPS_DEVICE_VIDEO_PRIMARY,
             QEMU_CAPS_DEVICE_QXL);
+
+    /* Make sure the default model for PCIe Root Ports is picked correctly
+     * based on QEMU binary capabilities. We use x86/q35 for the test, but
+     * any PCIe machine type (such as aarch64/virt) will behave the same */
+    DO_TEST("pcie-root-port-model-generic",
+            QEMU_CAPS_DEVICE_PCIE_ROOT_PORT,
+            QEMU_CAPS_DEVICE_IOH3420,
+            QEMU_CAPS_PCI_MULTIFUNCTION);
+    DO_TEST("pcie-root-port-model-ioh3420",
+            QEMU_CAPS_DEVICE_IOH3420,
+            QEMU_CAPS_PCI_MULTIFUNCTION);
+
     DO_TEST("pcie-switch-upstream-port",
             QEMU_CAPS_DEVICE_IOH3420,
             QEMU_CAPS_DEVICE_X3130_UPSTREAM,