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qemu: don't add pci-bridge to Q35/arm domains unless it's needed

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Until now, a Q35 domain (or arm/virt, or any other domain that has a
pcie-root bus) would always have a pci-bridge added, so that there
would be a hotpluggable standard PCI slot available to plug in any PCI
devices that might be added. This patch removes the explicit add,
instead relying on the pci-bridge being auto-added during PCI address
assignment (it will add a pci-bridge if there are no free slots).

This doesn't eliminate the dmi-to-pci-bridge controller that is
explicitly added whether or not a standard PCI slot is required (and
that is almost never used as anything other than a converter between
pcie.0's PCIe slots and standard PCI). That will be done separately.
This commit is contained in:
Laine Stump 2016-04-22 17:01:33 -04:00
parent 97b215a450
commit d5fb8f4564
6 changed files with 1 additions and 18 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
src/qemu/qemu_domain.c
View File

@ -1959,10 +1959,6 @@ qemuDomainDefAddDefaultDevices(virDomainDefPtr def,
!virDomainDefAddController(def, VIR_DOMAIN_CONTROLLER_TYPE_PCI, 1,
VIR_DOMAIN_CONTROLLER_MODEL_DMI_TO_PCI_BRIDGE))
goto cleanup;
if (virDomainControllerFind(def, VIR_DOMAIN_CONTROLLER_TYPE_PCI, 2) < 0 &&
!virDomainDefAddController(def, VIR_DOMAIN_CONTROLLER_TYPE_PCI, 2,
VIR_DOMAIN_CONTROLLER_MODEL_PCI_BRIDGE))
goto cleanup;
}
if (addDefaultMemballoon && !def->memballoon) {

1
tests/qemuxml2argvdata/qemuxml2argv-aarch64-virt-2.6-virtio-pci-default.args
View File

@ -22,7 +22,6 @@ QEMU_AUDIO_DRV=none \
-append 'earlyprintk console=ttyAMA0,115200n8 rw root=/dev/vda rootwait' \
-dtb /aarch64.dtb \
-device i82801b11-bridge,id=pci.1,bus=pcie.0,addr=0x1 \
-device pci-bridge,chassis_nr=2,id=pci.2,bus=pci.1,addr=0x0 \
-device virtio-serial-device,id=virtio-serial0 \
-usb \
-drive file=/aarch64.raw,format=raw,if=none,id=drive-virtio-disk0 \

1
tests/qemuxml2argvdata/qemuxml2argv-aarch64-virtio-pci-default.args
View File

@ -22,7 +22,6 @@ QEMU_AUDIO_DRV=none \
-append 'earlyprintk console=ttyAMA0,115200n8 rw root=/dev/vda rootwait' \
-dtb /aarch64.dtb \
-device i82801b11-bridge,id=pci.1,bus=pcie.0,addr=0x1 \
-device pci-bridge,chassis_nr=2,id=pci.2,bus=pci.1,addr=0x0 \
-device virtio-serial-device,id=virtio-serial0 \
-usb \
-drive file=/aarch64.raw,format=raw,if=none,id=drive-virtio-disk0 \

3
tests/qemuxml2argvdata/qemuxml2argv-pcie-root.args
View File

@ -16,5 +16,4 @@ QEMU_AUDIO_DRV=none \
-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 i82801b11-bridge,id=pci.1,bus=pcie.0,addr=0x1e

5
tests/qemuxml2xmloutdata/qemuxml2xmlout-aarch64-virtio-pci-default.xml
View File

@ -37,11 +37,6 @@
<model name='i82801b11-bridge'/>
<address type='pci' domain='0x0000' bus='0x00' slot='0x01' 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='virtio-serial' index='0'>
<address type='virtio-mmio'/>
</controller>

5
tests/qemuxml2xmloutdata/qemuxml2xmlout-pcie-root.xml
View File

@ -22,11 +22,6 @@
<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>
<input type='mouse' bus='ps2'/>
<input type='keyboard' bus='ps2'/>
<memballoon model='none'/>