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From 646a880d28b878dc45decb1b6d6238bf42ad1006 Mon Sep 17 00:00:00 2001
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Message-Id: <646a880d28b878dc45decb1b6d6238bf42ad1006@dist-git>
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From: Laine Stump <laine@laine.org>
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Date: Wed, 10 Aug 2016 11:00:14 -0400
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Subject: [PATCH] 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
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that a pci-expander-bus could be plugged into any legacy PCI slot, and
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that pcie-expander-bus could be plugged into any PCIe slot. This isn't
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correct - they can both be plugged ontly into their respective root
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buses. This patch adds that restriction.
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Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1358712
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(cherry picked from commit a220f43a65cca6c6f2ca268cdbbf8f997b2e2b13)
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---
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src/conf/domain_addr.c | 32 +++++++++------
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src/conf/domain_addr.h | 6 ++-
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.../qemuxml2argv-pci-expander-bus-bad-bus.xml | 26 ++++++++++++
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.../qemuxml2argv-pcie-expander-bus-bad-bus.xml | 48 ++++++++++++++++++++++
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tests/qemuxml2argvtest.c | 8 ++++
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5 files changed, 107 insertions(+), 13 deletions(-)
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create mode 100644 tests/qemuxml2argvdata/qemuxml2argv-pci-expander-bus-bad-bus.xml
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create mode 100644 tests/qemuxml2argvdata/qemuxml2argv-pcie-expander-bus-bad-bus.xml
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diff --git a/src/conf/domain_addr.c b/src/conf/domain_addr.c
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index ea641a5..14baef7 100644
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--- a/src/conf/domain_addr.c
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+++ b/src/conf/domain_addr.c
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@@ -51,20 +51,17 @@ virDomainPCIControllerModelToConnectType(virDomainControllerModelPCI model)
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return 0;
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case VIR_DOMAIN_CONTROLLER_MODEL_PCI_BRIDGE:
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- case VIR_DOMAIN_CONTROLLER_MODEL_PCI_EXPANDER_BUS:
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- /* pci-bridge and pci-expander-bus are treated like a standard
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- * PCI endpoint device, because they can plug into any
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- * standard PCI slot.
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+ /* pci-bridge is treated like a standard
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+ * PCI endpoint device, because it can plug into any
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+ * standard PCI slot (it just can't be hotplugged).
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*/
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return VIR_PCI_CONNECT_TYPE_PCI_DEVICE;
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+ case VIR_DOMAIN_CONTROLLER_MODEL_PCI_EXPANDER_BUS:
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+ return VIR_PCI_CONNECT_TYPE_PCI_EXPANDER_BUS;
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+
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case VIR_DOMAIN_CONTROLLER_MODEL_PCIE_EXPANDER_BUS:
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- /* pcie-expander-bus is treated like a standard PCIe endpoint
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- * device (the part of pcie-expander-bus that is plugged in
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- * isn't the expander bus itself, but a companion device used
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- * for setting it up).
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- */
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- return VIR_PCI_CONNECT_TYPE_PCIE_DEVICE;
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+ return VIR_PCI_CONNECT_TYPE_PCIE_EXPANDER_BUS;
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case VIR_DOMAIN_CONTROLLER_MODEL_DMI_TO_PCI_BRIDGE:
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return VIR_PCI_CONNECT_TYPE_DMI_TO_PCI_BRIDGE;
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@@ -137,6 +134,10 @@ virDomainPCIAddressFlagsCompatible(virPCIDeviceAddressPtr addr,
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connectStr = "pci-switch-downstream-port";
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} else if (devFlags & VIR_PCI_CONNECT_TYPE_DMI_TO_PCI_BRIDGE) {
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connectStr = "dmi-to-pci-bridge";
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+ } else if (devFlags & VIR_PCI_CONNECT_TYPE_PCI_EXPANDER_BUS) {
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+ connectStr = "pci-expander-bus";
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+ } else if (devFlags & VIR_PCI_CONNECT_TYPE_PCIE_EXPANDER_BUS) {
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+ connectStr = "pcie-expander-bus";
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} else {
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/* this should never happen. If it does, there is a
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* bug in the code that sets the flag bits for devices.
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@@ -243,9 +244,15 @@ virDomainPCIAddressBusSetModel(virDomainPCIAddressBusPtr bus,
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* bus.
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*/
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switch (model) {
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- case VIR_DOMAIN_CONTROLLER_MODEL_PCI_BRIDGE:
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case VIR_DOMAIN_CONTROLLER_MODEL_PCI_ROOT:
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bus->flags = (VIR_PCI_CONNECT_HOTPLUGGABLE |
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+ VIR_PCI_CONNECT_TYPE_PCI_DEVICE |
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+ VIR_PCI_CONNECT_TYPE_PCI_EXPANDER_BUS);
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+ bus->minSlot = 1;
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+ bus->maxSlot = VIR_PCI_ADDRESS_SLOT_LAST;
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+ break;
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+ case VIR_DOMAIN_CONTROLLER_MODEL_PCI_BRIDGE:
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+ bus->flags = (VIR_PCI_CONNECT_HOTPLUGGABLE |
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VIR_PCI_CONNECT_TYPE_PCI_DEVICE);
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bus->minSlot = 1;
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bus->maxSlot = VIR_PCI_ADDRESS_SLOT_LAST;
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@@ -265,7 +272,8 @@ virDomainPCIAddressBusSetModel(virDomainPCIAddressBusPtr bus,
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*/
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bus->flags = (VIR_PCI_CONNECT_TYPE_PCIE_DEVICE |
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VIR_PCI_CONNECT_TYPE_PCIE_ROOT_PORT |
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- VIR_PCI_CONNECT_TYPE_DMI_TO_PCI_BRIDGE);
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+ VIR_PCI_CONNECT_TYPE_DMI_TO_PCI_BRIDGE |
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+ VIR_PCI_CONNECT_TYPE_PCIE_EXPANDER_BUS);
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bus->minSlot = 1;
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bus->maxSlot = VIR_PCI_ADDRESS_SLOT_LAST;
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break;
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diff --git a/src/conf/domain_addr.h b/src/conf/domain_addr.h
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index 2d55c46..da19311 100644
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--- a/src/conf/domain_addr.h
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+++ b/src/conf/domain_addr.h
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@@ -41,6 +41,8 @@ typedef enum {
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VIR_PCI_CONNECT_TYPE_PCIE_SWITCH_UPSTREAM_PORT = 1 << 4,
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VIR_PCI_CONNECT_TYPE_PCIE_SWITCH_DOWNSTREAM_PORT = 1 << 5,
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VIR_PCI_CONNECT_TYPE_DMI_TO_PCI_BRIDGE = 1 << 6,
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+ VIR_PCI_CONNECT_TYPE_PCI_EXPANDER_BUS = 1 << 7,
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+ VIR_PCI_CONNECT_TYPE_PCIE_EXPANDER_BUS = 1 << 8,
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} virDomainPCIConnectFlags;
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/* a combination of all bits that describe the type of connections
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@@ -51,7 +53,9 @@ typedef enum {
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VIR_PCI_CONNECT_TYPE_PCIE_SWITCH_UPSTREAM_PORT | \
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VIR_PCI_CONNECT_TYPE_PCIE_SWITCH_DOWNSTREAM_PORT | \
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VIR_PCI_CONNECT_TYPE_PCIE_ROOT_PORT | \
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- VIR_PCI_CONNECT_TYPE_DMI_TO_PCI_BRIDGE)
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+ VIR_PCI_CONNECT_TYPE_DMI_TO_PCI_BRIDGE | \
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+ VIR_PCI_CONNECT_TYPE_PCI_EXPANDER_BUS | \
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+ VIR_PCI_CONNECT_TYPE_PCIE_EXPANDER_BUS)
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/* combination of all bits that could be used to connect a normal
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* endpoint device (i.e. excluding the connection possible between an
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diff --git a/tests/qemuxml2argvdata/qemuxml2argv-pci-expander-bus-bad-bus.xml b/tests/qemuxml2argvdata/qemuxml2argv-pci-expander-bus-bad-bus.xml
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new file mode 100644
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index 0000000..85c1115
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--- /dev/null
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+++ b/tests/qemuxml2argvdata/qemuxml2argv-pci-expander-bus-bad-bus.xml
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@@ -0,0 +1,26 @@
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+<domain type='qemu'>
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+ <name>expander-test</name>
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+ <uuid>3ec6cbe1-b5a2-4515-b800-31a61855df41</uuid>
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+ <memory unit='KiB'>219100</memory>
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+ <currentMemory unit='KiB'>219100</currentMemory>
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+ <vcpu placement='static'>16</vcpu>
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+ <os>
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+ <type arch='x86_64' machine='pc-i440fx-2.5'>hvm</type>
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+ </os>
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+ <devices>
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+ <emulator>/usr/bin/qemu-system-x86_64</emulator>
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+ <controller type='usb' index='0' model='none'/>
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+ <controller type='ide' index='0'>
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+ <address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x1'/>
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+ </controller>
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+ <controller type='pci' index='0' model='pci-root'/>
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+ <controller type='pci' index='1' model='pci-bridge'>
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+ </controller>
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+ <controller type='pci' index='2' model='pci-expander-bus'>
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+ <address type='pci' bus='1' slot='1'/>
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+ </controller>
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+ <input type='mouse' bus='ps2'/>
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+ <input type='keyboard' bus='ps2'/>
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+ <memballoon model='none'/>
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+ </devices>
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+</domain>
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diff --git a/tests/qemuxml2argvdata/qemuxml2argv-pcie-expander-bus-bad-bus.xml b/tests/qemuxml2argvdata/qemuxml2argv-pcie-expander-bus-bad-bus.xml
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new file mode 100644
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index 0000000..0305f35
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--- /dev/null
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+++ b/tests/qemuxml2argvdata/qemuxml2argv-pcie-expander-bus-bad-bus.xml
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@@ -0,0 +1,48 @@
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+<domain type='qemu'>
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+ <name>pcie-expander-bus-test</name>
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+ <uuid>11dbdcdd-4c3b-482b-8903-9bdb8c0a2774</uuid>
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+ <memory unit='KiB'>2097152</memory>
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+ <currentMemory unit='KiB'>2097152</currentMemory>
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+ <vcpu placement='static'>16</vcpu>
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+ <os>
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+ <type arch='x86_64' machine='q35'>hvm</type>
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+ <boot dev='hd'/>
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+ </os>
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+ <cpu>
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+ <topology sockets='2' cores='4' threads='2'/>
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+ <numa>
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+ <cell cpus='0-7' memory='109550' unit='KiB'/>
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+ <cell cpus='8-15' memory='109550' unit='KiB'/>
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+ </numa>
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+ </cpu>
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+ <clock offset='utc'/>
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+ <on_poweroff>destroy</on_poweroff>
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+ <on_reboot>restart</on_reboot>
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+ <on_crash>destroy</on_crash>
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+ <devices>
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+ <emulator>/usr/libexec/qemu-kvm</emulator>
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+ <disk type='block' device='disk'>
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+ <source dev='/dev/HostVG/QEMUGuest1'/>
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+ <target dev='sda' bus='sata'/>
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+ <address type='drive' controller='0' bus='0' target='0' unit='0'/>
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+ </disk>
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+ <controller type='pci' index='0' model='pcie-root'/>
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+ <controller type='pci' index='1' model='dmi-to-pci-bridge'>
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+ <model name='i82801b11-bridge'/>
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+ </controller>
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+ <controller type='pci' index='2' model='pci-bridge'>
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+ <model name='pci-bridge'/>
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+ <target chassisNr='56'/>
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+ </controller>
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+ <controller type='pci' index='3' model='pcie-root-port'>
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+ <target busNr='220'>
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+ <node>1</node>
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+ </target>
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+ <address type='pci' bus='0x00'/>
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+ </controller>
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+ <controller type='pci' index='4' model='pcie-expander-bus'>
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+ <address type='pci' bus='3'/>
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+ </controller>
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+ <memballoon model='none'/>
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+ </devices>
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+</domain>
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diff --git a/tests/qemuxml2argvtest.c b/tests/qemuxml2argvtest.c
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index c7c0ff2..b86a8a1 100644
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--- a/tests/qemuxml2argvtest.c
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+++ b/tests/qemuxml2argvtest.c
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@@ -1730,6 +1730,9 @@ mymain(void)
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DO_TEST_PARSE_ERROR("pci-expander-bus-bad-machine",
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QEMU_CAPS_DEVICE_PCI_BRIDGE,
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QEMU_CAPS_DEVICE_PXB);
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+ DO_TEST_PARSE_ERROR("pci-expander-bus-bad-bus",
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+ QEMU_CAPS_DEVICE_PCI_BRIDGE,
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+ QEMU_CAPS_DEVICE_PXB);
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DO_TEST("pcie-expander-bus",
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QEMU_CAPS_DEVICE_PCI_BRIDGE,
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@@ -1745,6 +1748,11 @@ mymain(void)
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QEMU_CAPS_DEVICE_X3130_UPSTREAM,
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QEMU_CAPS_DEVICE_XIO3130_DOWNSTREAM,
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QEMU_CAPS_DEVICE_PXB_PCIE);
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+ DO_TEST_PARSE_ERROR("pcie-expander-bus-bad-bus",
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+ QEMU_CAPS_DEVICE_PCI_BRIDGE,
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+ QEMU_CAPS_DEVICE_DMI_TO_PCI_BRIDGE,
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+ QEMU_CAPS_DEVICE_IOH3420,
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+ QEMU_CAPS_DEVICE_PXB_PCIE);
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DO_TEST("hostdev-scsi-lsi",
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QEMU_CAPS_VIRTIO_SCSI, QEMU_CAPS_SCSI_LSI,
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--
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2.9.2
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