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conf: restrict expander buses to connect only to a root bus

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More misunderstanding/mistaken assumptions on my part - I had thought
that a pci-expander-bus could be plugged into any legacy PCI slot, and
that pcie-expander-bus could be plugged into any PCIe slot. This isn't
correct - they can both be plugged ontly into their respective root
buses. This patch adds that restriction.

Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1358712
This commit is contained in:
Laine Stump
2016-08-06 19:03:31 -04:00
parent b70e3d0123
commit a220f43a65
5 changed files with 107 additions and 13 deletions
Download Patch File Download Diff File Expand all files Collapse all files

32
src/conf/domain_addr.c
View File

@@ -51,20 +51,17 @@ virDomainPCIControllerModelToConnectType(virDomainControllerModelPCI model)
return 0;
case VIR_DOMAIN_CONTROLLER_MODEL_PCI_BRIDGE:
case VIR_DOMAIN_CONTROLLER_MODEL_PCI_EXPANDER_BUS:
/* pci-bridge and pci-expander-bus are treated like a standard
* PCI endpoint device, because they can plug into any
* standard PCI slot.
/* pci-bridge is treated like a standard
* PCI endpoint device, because it can plug into any
* standard PCI slot (it just can't be hotplugged).
*/
return VIR_PCI_CONNECT_TYPE_PCI_DEVICE;
case VIR_DOMAIN_CONTROLLER_MODEL_PCI_EXPANDER_BUS:
return VIR_PCI_CONNECT_TYPE_PCI_EXPANDER_BUS;
case VIR_DOMAIN_CONTROLLER_MODEL_PCIE_EXPANDER_BUS:
/* 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;
return VIR_PCI_CONNECT_TYPE_PCIE_EXPANDER_BUS;
case VIR_DOMAIN_CONTROLLER_MODEL_DMI_TO_PCI_BRIDGE:
return VIR_PCI_CONNECT_TYPE_DMI_TO_PCI_BRIDGE;
@@ -137,6 +134,10 @@ virDomainPCIAddressFlagsCompatible(virPCIDeviceAddressPtr addr,
connectStr = "pci-switch-downstream-port";
} else if (devFlags & VIR_PCI_CONNECT_TYPE_DMI_TO_PCI_BRIDGE) {
connectStr = "dmi-to-pci-bridge";
} else if (devFlags & VIR_PCI_CONNECT_TYPE_PCI_EXPANDER_BUS) {
connectStr = "pci-expander-bus";
} else if (devFlags & VIR_PCI_CONNECT_TYPE_PCIE_EXPANDER_BUS) {
connectStr = "pcie-expander-bus";
} else {
/* this should never happen. If it does, there is a
* bug in the code that sets the flag bits for devices.
@@ -243,8 +244,14 @@ virDomainPCIAddressBusSetModel(virDomainPCIAddressBusPtr bus,
* bus.
*/
switch (model) {
case VIR_DOMAIN_CONTROLLER_MODEL_PCI_BRIDGE:
case VIR_DOMAIN_CONTROLLER_MODEL_PCI_ROOT:
bus->flags = (VIR_PCI_CONNECT_HOTPLUGGABLE |
VIR_PCI_CONNECT_TYPE_PCI_DEVICE |
VIR_PCI_CONNECT_TYPE_PCI_EXPANDER_BUS);
bus->minSlot = 1;
bus->maxSlot = VIR_PCI_ADDRESS_SLOT_LAST;
break;
case VIR_DOMAIN_CONTROLLER_MODEL_PCI_BRIDGE:
bus->flags = (VIR_PCI_CONNECT_HOTPLUGGABLE |
VIR_PCI_CONNECT_TYPE_PCI_DEVICE);
bus->minSlot = 1;
@@ -265,7 +272,8 @@ virDomainPCIAddressBusSetModel(virDomainPCIAddressBusPtr bus,
*/
bus->flags = (VIR_PCI_CONNECT_TYPE_PCIE_DEVICE |
VIR_PCI_CONNECT_TYPE_PCIE_ROOT_PORT |
VIR_PCI_CONNECT_TYPE_DMI_TO_PCI_BRIDGE);
VIR_PCI_CONNECT_TYPE_DMI_TO_PCI_BRIDGE |
VIR_PCI_CONNECT_TYPE_PCIE_EXPANDER_BUS);
bus->minSlot = 1;
bus->maxSlot = VIR_PCI_ADDRESS_SLOT_LAST;
break;

6
src/conf/domain_addr.h
View File

@@ -41,6 +41,8 @@ typedef enum {
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,
VIR_PCI_CONNECT_TYPE_PCI_EXPANDER_BUS = 1 << 7,
VIR_PCI_CONNECT_TYPE_PCIE_EXPANDER_BUS = 1 << 8,
} virDomainPCIConnectFlags;
/* a combination of all bits that describe the type of connections
@@ -51,7 +53,9 @@ typedef enum {
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_DMI_TO_PCI_BRIDGE)
VIR_PCI_CONNECT_TYPE_DMI_TO_PCI_BRIDGE | \
VIR_PCI_CONNECT_TYPE_PCI_EXPANDER_BUS | \
VIR_PCI_CONNECT_TYPE_PCIE_EXPANDER_BUS)
/* combination of all bits that could be used to connect a normal
* endpoint device (i.e. excluding the connection possible between an