[libvirt] [PATCH 3/3] conf: restrict where dmi-to-pci-bridge can be connected
Laine Stump
laine at laine.org
Sat Aug 6 03:01:06 UTC 2016
libvirt had allowed a dmi-to-pci-bridge to be plugged in anywhere a
normal PCIe endpoint can be connected, but this is wrong - it will
only work if it's plugged into pcie-root (the PCIe root complex) or a
pcie-expander-bus (the qemu device pxb-pcie). This patch adjusts the
connection flags accordingly.
Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1363648
---
src/conf/domain_addr.c | 22 +++++++-----
src/conf/domain_addr.h | 4 ++-
.../qemuxml2argv-q35-dmi-bad-address1.xml | 39 ++++++++++++++++++++++
.../qemuxml2argv-q35-dmi-bad-address2.xml | 39 ++++++++++++++++++++++
tests/qemuxml2argvtest.c | 16 +++++++++
5 files changed, 111 insertions(+), 9 deletions(-)
create mode 100644 tests/qemuxml2argvdata/qemuxml2argv-q35-dmi-bad-address1.xml
create mode 100644 tests/qemuxml2argvdata/qemuxml2argv-q35-dmi-bad-address2.xml
diff --git a/src/conf/domain_addr.c b/src/conf/domain_addr.c
index faf5a5a..caffd71 100644
--- a/src/conf/domain_addr.c
+++ b/src/conf/domain_addr.c
@@ -58,15 +58,17 @@ virDomainPCIControllerModelToConnectType(virDomainControllerModelPCI model)
*/
return VIR_PCI_CONNECT_TYPE_PCI_DEVICE;
- case VIR_DOMAIN_CONTROLLER_MODEL_DMI_TO_PCI_BRIDGE:
case VIR_DOMAIN_CONTROLLER_MODEL_PCIE_EXPANDER_BUS:
- /* dmi-to-pci-bridge and pcie-expander-bus are treated like
- * PCIe devices (the part of pcie-expander-bus that is plugged
- * in isn't the expander bus itself, but a companion device
- * used for setting it up).
+ /* pcie-expander-bus is treated like a standard PCIe endpoint
+ * device (the part of pcie-expander-bus that is plugged in
+ * isn't the expander bus itself, but a companion device used
+ * for setting it up).
*/
return VIR_PCI_CONNECT_TYPE_PCIE_DEVICE;
+ case VIR_DOMAIN_CONTROLLER_MODEL_DMI_TO_PCI_BRIDGE:
+ return VIR_PCI_CONNECT_TYPE_DMI_TO_PCI_BRIDGE;
+
case VIR_DOMAIN_CONTROLLER_MODEL_PCIE_ROOT_PORT:
return VIR_PCI_CONNECT_TYPE_PCIE_ROOT_PORT;
@@ -260,7 +262,8 @@ virDomainPCIAddressBusSetModel(virDomainPCIAddressBusPtr bus,
* allows it.
*/
bus->flags = (VIR_PCI_CONNECT_TYPE_PCIE_DEVICE
- | VIR_PCI_CONNECT_TYPE_PCIE_ROOT_PORT);
+ | VIR_PCI_CONNECT_TYPE_PCIE_ROOT_PORT
+ | VIR_PCI_CONNECT_TYPE_DMI_TO_PCI_BRIDGE);
bus->minSlot = 1;
bus->maxSlot = VIR_PCI_ADDRESS_SLOT_LAST;
break;
@@ -291,8 +294,11 @@ virDomainPCIAddressBusSetModel(virDomainPCIAddressBusPtr bus,
bus->maxSlot = VIR_PCI_ADDRESS_SLOT_LAST;
break;
case VIR_DOMAIN_CONTROLLER_MODEL_PCIE_EXPANDER_BUS:
- /* single slot, no hotplug, only accepts pcie-root-port */
- bus->flags = VIR_PCI_CONNECT_TYPE_PCIE_ROOT_PORT;
+ /* single slot, no hotplug, only accepts pcie-root-port or
+ * dmi-to-pci-bridge
+ */
+ bus->flags = (VIR_PCI_CONNECT_TYPE_PCIE_ROOT_PORT
+ | VIR_PCI_CONNECT_TYPE_DMI_TO_PCI_BRIDGE);
bus->minSlot = 0;
bus->maxSlot = 0;
break;
diff --git a/src/conf/domain_addr.h b/src/conf/domain_addr.h
index 4584e0a..4ce4139 100644
--- a/src/conf/domain_addr.h
+++ b/src/conf/domain_addr.h
@@ -40,6 +40,7 @@ typedef enum {
VIR_PCI_CONNECT_TYPE_PCIE_ROOT_PORT = 1 << 3,
VIR_PCI_CONNECT_TYPE_PCIE_SWITCH_UPSTREAM_PORT = 1 << 4,
VIR_PCI_CONNECT_TYPE_PCIE_SWITCH_DOWNSTREAM_PORT = 1 << 5,
+ VIR_PCI_CONNECT_TYPE_DMI_TO_PCI_BRIDGE = 1 << 6,
} virDomainPCIConnectFlags;
/* a combination of all bits that describe the type of connections
@@ -49,7 +50,8 @@ typedef enum {
(VIR_PCI_CONNECT_TYPE_PCI_DEVICE | VIR_PCI_CONNECT_TYPE_PCIE_DEVICE | \
VIR_PCI_CONNECT_TYPE_PCIE_SWITCH_UPSTREAM_PORT | \
VIR_PCI_CONNECT_TYPE_PCIE_SWITCH_DOWNSTREAM_PORT | \
- VIR_PCI_CONNECT_TYPE_PCIE_ROOT_PORT)
+ VIR_PCI_CONNECT_TYPE_PCIE_ROOT_PORT | \
+ VIR_PCI_CONNECT_TYPE_DMI_TO_PCI_BRIDGE)
/* 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/tests/qemuxml2argvdata/qemuxml2argv-q35-dmi-bad-address1.xml b/tests/qemuxml2argvdata/qemuxml2argv-q35-dmi-bad-address1.xml
new file mode 100644
index 0000000..3a946dd
--- /dev/null
+++ b/tests/qemuxml2argvdata/qemuxml2argv-q35-dmi-bad-address1.xml
@@ -0,0 +1,39 @@
+<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'>
+ <model name='i82801b11-bridge'/>
+ </controller>
+ <controller type='pci' index='2' model='pci-bridge'>
+ <model name='pci-bridge'/>
+ <target chassisNr='56'/>
+ </controller>
+ <controller type='pci' index='3' model='pcie-root-port'/>
+ <controller type='pci' index='4' model='dmi-to-pci-bridge'>
+ <address type='pci' bus='2' slot='3'/>
+ </controller>
+ <video>
+ <model type='qxl' ram='65536' vram='32768' vgamem='8192' heads='1'/>
+ </video>
+ <memballoon model='none'/>
+ </devices>
+</domain>
diff --git a/tests/qemuxml2argvdata/qemuxml2argv-q35-dmi-bad-address2.xml b/tests/qemuxml2argvdata/qemuxml2argv-q35-dmi-bad-address2.xml
new file mode 100644
index 0000000..c3c1b6a
--- /dev/null
+++ b/tests/qemuxml2argvdata/qemuxml2argv-q35-dmi-bad-address2.xml
@@ -0,0 +1,39 @@
+<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'>
+ <model name='i82801b11-bridge'/>
+ </controller>
+ <controller type='pci' index='2' model='pci-bridge'>
+ <model name='pci-bridge'/>
+ <target chassisNr='56'/>
+ </controller>
+ <controller type='pci' index='3' model='pcie-root-port'/>
+ <controller type='pci' index='4' model='dmi-to-pci-bridge'>
+ <address type='pci' bus='3'/>
+ </controller>
+ <video>
+ <model type='qxl' ram='65536' vram='32768' vgamem='8192' heads='1'/>
+ </video>
+ <memballoon model='none'/>
+ </devices>
+</domain>
diff --git a/tests/qemuxml2argvtest.c b/tests/qemuxml2argvtest.c
index d594836..933f9be 100644
--- a/tests/qemuxml2argvtest.c
+++ b/tests/qemuxml2argvtest.c
@@ -1631,6 +1631,22 @@ mymain(void)
QEMU_CAPS_PCI_MULTIFUNCTION, QEMU_CAPS_ICH9_USB_EHCI1,
QEMU_CAPS_DEVICE_VIDEO_PRIMARY,
QEMU_CAPS_VGA_QXL, QEMU_CAPS_DEVICE_QXL);
+ DO_TEST_PARSE_ERROR("q35-dmi-bad-address1",
+ QEMU_CAPS_DEVICE_PCI_BRIDGE,
+ QEMU_CAPS_DEVICE_DMI_TO_PCI_BRIDGE,
+ QEMU_CAPS_DEVICE_IOH3420,
+ QEMU_CAPS_ICH9_AHCI,
+ QEMU_CAPS_PCI_MULTIFUNCTION, QEMU_CAPS_ICH9_USB_EHCI1,
+ QEMU_CAPS_DEVICE_VIDEO_PRIMARY,
+ QEMU_CAPS_VGA_QXL, QEMU_CAPS_DEVICE_QXL);
+ DO_TEST_PARSE_ERROR("q35-dmi-bad-address2",
+ QEMU_CAPS_DEVICE_PCI_BRIDGE,
+ QEMU_CAPS_DEVICE_DMI_TO_PCI_BRIDGE,
+ QEMU_CAPS_DEVICE_IOH3420,
+ QEMU_CAPS_ICH9_AHCI,
+ QEMU_CAPS_PCI_MULTIFUNCTION, QEMU_CAPS_ICH9_USB_EHCI1,
+ QEMU_CAPS_DEVICE_VIDEO_PRIMARY,
+ QEMU_CAPS_VGA_QXL, QEMU_CAPS_DEVICE_QXL);
DO_TEST("q35-pm-disable",
QEMU_CAPS_DEVICE_PCI_BRIDGE,
QEMU_CAPS_DEVICE_DMI_TO_PCI_BRIDGE, QEMU_CAPS_ICH9_AHCI,
--
2.7.4
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