[libvirt] [PATCH 3/4] qemu_command: ignore non-assigned PCI multifunction hostdevs
Daniel Henrique Barboza
danielhb413 at gmail.com
Mon Oct 7 21:11:35 UTC 2019
Bulding up in the new attribute introduced by the previous patch,
let's not assign a hostdev to a QEMU domain by avoiding the
'-device' line to be created at all inside qemu_command.c.
Since the device isn't going to be guest visible, makes little
sense to assign alias and address to it, so let's also prevent
that.
Signed-off-by: Daniel Henrique Barboza <danielhb413 at gmail.com>
---
src/qemu/qemu_alias.c | 8 +++
src/qemu/qemu_command.c | 5 ++
src/qemu/qemu_domain_address.c | 7 +++
.../hostdev-pci-multifunction-partial.args | 31 ++++++++++
.../hostdev-pci-multifunction-partial.xml | 41 +++++++++++++
tests/qemuxml2argvtest.c | 4 ++
.../hostdev-pci-multifunction-partial.xml | 57 +++++++++++++++++++
tests/qemuxml2xmltest.c | 1 +
8 files changed, 154 insertions(+)
create mode 100644 tests/qemuxml2argvdata/hostdev-pci-multifunction-partial.args
create mode 100644 tests/qemuxml2argvdata/hostdev-pci-multifunction-partial.xml
create mode 100644 tests/qemuxml2xmloutdata/hostdev-pci-multifunction-partial.xml
diff --git a/src/qemu/qemu_alias.c b/src/qemu/qemu_alias.c
index d294963d35..f1705a9a47 100644
--- a/src/qemu/qemu_alias.c
+++ b/src/qemu/qemu_alias.c
@@ -602,6 +602,14 @@ qemuAssignDeviceAliases(virDomainDefPtr def, virQEMUCapsPtr qemuCaps)
return -1;
}
for (i = 0; i < def->nhostdevs; i++) {
+ /* do not assign alias for PCI multifunction hostdevs that
+ * will not be assigned to the guest.
+ */
+
+ if (virHostdevIsPCIMultifunctionDevice(def->hostdevs[i]) &&
+ !def->hostdevs[i]->assigned)
+ continue;
+
/* we can't start assigning at 0, since netdevs may have used
* up some hostdevN entries already. Also if the HostdevDef is
* linked to a NetDef, they will share an info and the alias
diff --git a/src/qemu/qemu_command.c b/src/qemu/qemu_command.c
index cbf25d5f07..1e12550e9b 100644
--- a/src/qemu/qemu_command.c
+++ b/src/qemu/qemu_command.c
@@ -5490,6 +5490,11 @@ qemuBuildHostdevCommandLine(virCommandPtr cmd,
}
}
+ /* Ignore 'noAssign' devices
+ */
+ if (!hostdev->assigned)
+ continue;
+
unsigned int bootIndex = hostdev->info->bootIndex;
/* bootNet will be non-0 if boot order was set and no other
diff --git a/src/qemu/qemu_domain_address.c b/src/qemu/qemu_domain_address.c
index 4f5671f458..71711e22d2 100644
--- a/src/qemu/qemu_domain_address.c
+++ b/src/qemu/qemu_domain_address.c
@@ -2319,6 +2319,13 @@ qemuDomainAssignDevicePCISlots(virDomainDefPtr def,
continue;
}
+ /* Do not assign an address to a hostdev that will not
+ * be assigned to the guest.
+ */
+ if (virHostdevIsPCIMultifunctionDevice(def->hostdevs[i]) &&
+ !def->hostdevs[i]->assigned)
+ continue;
+
if (qemuDomainPCIAddressReserveNextAddr(addrs,
def->hostdevs[i]->info) < 0)
goto error;
diff --git a/tests/qemuxml2argvdata/hostdev-pci-multifunction-partial.args b/tests/qemuxml2argvdata/hostdev-pci-multifunction-partial.args
new file mode 100644
index 0000000000..4074968c84
--- /dev/null
+++ b/tests/qemuxml2argvdata/hostdev-pci-multifunction-partial.args
@@ -0,0 +1,31 @@
+LC_ALL=C \
+PATH=/bin \
+HOME=/tmp/lib/domain--1-delete \
+USER=test \
+LOGNAME=test \
+XDG_DATA_HOME=/tmp/lib/domain--1-delete/.local/share \
+XDG_CACHE_HOME=/tmp/lib/domain--1-delete/.cache \
+XDG_CONFIG_HOME=/tmp/lib/domain--1-delete/.config \
+QEMU_AUDIO_DRV=none \
+/usr/bin/qemu-system-x86_64 \
+-name delete \
+-S \
+-machine pc,accel=kvm,usb=off,dump-guest-core=off \
+-m 256 \
+-realtime mlock=off \
+-smp 4,sockets=4,cores=1,threads=1 \
+-uuid 583a8e8e-f0ce-4f53-89ab-092862148b25 \
+-display none \
+-no-user-config \
+-nodefaults \
+-chardev socket,id=charmonitor,path=/tmp/lib/domain--1-delete/monitor.sock,\
+server,nowait \
+-mon chardev=charmonitor,id=monitor,mode=control \
+-rtc base=utc \
+-no-shutdown \
+-no-acpi \
+-usb \
+-device vfio-pci,host=0005:90:01.0,id=hostdev0,bus=pci.0,addr=0x3 \
+-device vfio-pci,host=0005:90:01.1,id=hostdev1,bus=pci.0,addr=0x4 \
+-device vfio-pci,host=0005:90:01.3,id=hostdev2,bus=pci.0,addr=0x5 \
+-device virtio-balloon-pci,id=balloon0,bus=pci.0,addr=0x6
diff --git a/tests/qemuxml2argvdata/hostdev-pci-multifunction-partial.xml b/tests/qemuxml2argvdata/hostdev-pci-multifunction-partial.xml
new file mode 100644
index 0000000000..e87dfcdcff
--- /dev/null
+++ b/tests/qemuxml2argvdata/hostdev-pci-multifunction-partial.xml
@@ -0,0 +1,41 @@
+<domain type='kvm'>
+ <name>delete</name>
+ <uuid>583a8e8e-f0ce-4f53-89ab-092862148b25</uuid>
+ <memory unit='KiB'>262144</memory>
+ <vcpu placement='static'>4</vcpu>
+ <os>
+ <type arch='x86_64' machine='pc'>hvm</type>
+ </os>
+ <devices>
+ <emulator>/usr/bin/qemu-system-x86_64</emulator>
+ <controller type='usb' index='0'/>
+ <controller type='ide' index='0'/>
+ <controller type='pci' index='0' model='pci-root'/>
+ <input type='mouse' bus='ps2'/>
+ <input type='keyboard' bus='ps2'/>
+ <hostdev mode='subsystem' type='pci' managed='yes'>
+ <driver name='vfio'/>
+ <source>
+ <address domain='0x0005' bus='0x90' slot='0x01' function='0x0'/>
+ </source>
+ </hostdev>
+ <hostdev mode='subsystem' type='pci' managed='yes'>
+ <driver name='vfio'/>
+ <source>
+ <address domain='0x0005' bus='0x90' slot='0x01' function='0x1'/>
+ </source>
+ </hostdev>
+ <hostdev mode='subsystem' type='pci' managed='yes' assigned='no'>
+ <driver name='vfio'/>
+ <source>
+ <address domain='0x0005' bus='0x90' slot='0x01' function='0x2'/>
+ </source>
+ </hostdev>
+ <hostdev mode='subsystem' type='pci' managed='yes'>
+ <driver name='vfio'/>
+ <source>
+ <address domain='0x0005' bus='0x90' slot='0x01' function='0x3'/>
+ </source>
+ </hostdev>
+ </devices>
+</domain>
diff --git a/tests/qemuxml2argvtest.c b/tests/qemuxml2argvtest.c
index db79301f0e..434e01308c 100644
--- a/tests/qemuxml2argvtest.c
+++ b/tests/qemuxml2argvtest.c
@@ -1357,6 +1357,10 @@ mymain(void)
QEMU_CAPS_KVM,
QEMU_CAPS_DEVICE_VFIO_PCI);
+ DO_TEST("hostdev-pci-multifunction-partial",
+ QEMU_CAPS_KVM,
+ QEMU_CAPS_DEVICE_VFIO_PCI);
+
DO_TEST("serial-file-log",
QEMU_CAPS_CHARDEV_FILE_APPEND,
QEMU_CAPS_DEVICE_ISA_SERIAL,
diff --git a/tests/qemuxml2xmloutdata/hostdev-pci-multifunction-partial.xml b/tests/qemuxml2xmloutdata/hostdev-pci-multifunction-partial.xml
new file mode 100644
index 0000000000..aa8da25ccd
--- /dev/null
+++ b/tests/qemuxml2xmloutdata/hostdev-pci-multifunction-partial.xml
@@ -0,0 +1,57 @@
+<domain type='kvm'>
+ <name>delete</name>
+ <uuid>583a8e8e-f0ce-4f53-89ab-092862148b25</uuid>
+ <memory unit='KiB'>262144</memory>
+ <currentMemory unit='KiB'>262144</currentMemory>
+ <vcpu placement='static'>4</vcpu>
+ <os>
+ <type arch='x86_64' machine='pc'>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='usb' index='0'>
+ <address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x2'/>
+ </controller>
+ <controller type='ide' index='0'>
+ <address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x1'/>
+ </controller>
+ <controller type='pci' index='0' model='pci-root'/>
+ <input type='mouse' bus='ps2'/>
+ <input type='keyboard' bus='ps2'/>
+ <hostdev mode='subsystem' type='pci' managed='yes' assigned='yes'>
+ <driver name='vfio'/>
+ <source>
+ <address domain='0x0005' bus='0x90' slot='0x01' function='0x0'/>
+ </source>
+ <address type='pci' domain='0x0000' bus='0x00' slot='0x03' function='0x0'/>
+ </hostdev>
+ <hostdev mode='subsystem' type='pci' managed='yes' assigned='yes'>
+ <driver name='vfio'/>
+ <source>
+ <address domain='0x0005' bus='0x90' slot='0x01' function='0x1'/>
+ </source>
+ <address type='pci' domain='0x0000' bus='0x00' slot='0x04' function='0x0'/>
+ </hostdev>
+ <hostdev mode='subsystem' type='pci' managed='yes' assigned='no'>
+ <driver name='vfio'/>
+ <source>
+ <address domain='0x0005' bus='0x90' slot='0x01' function='0x2'/>
+ </source>
+ </hostdev>
+ <hostdev mode='subsystem' type='pci' managed='yes' assigned='yes'>
+ <driver name='vfio'/>
+ <source>
+ <address domain='0x0005' bus='0x90' slot='0x01' function='0x3'/>
+ </source>
+ <address type='pci' domain='0x0000' bus='0x00' slot='0x05' function='0x0'/>
+ </hostdev>
+ <memballoon model='virtio'>
+ <address type='pci' domain='0x0000' bus='0x00' slot='0x06' function='0x0'/>
+ </memballoon>
+ </devices>
+</domain>
diff --git a/tests/qemuxml2xmltest.c b/tests/qemuxml2xmltest.c
index d5c66d8791..5e0fa6af86 100644
--- a/tests/qemuxml2xmltest.c
+++ b/tests/qemuxml2xmltest.c
@@ -441,6 +441,7 @@ mymain(void)
DO_TEST("hostdev-usb-address", NONE);
DO_TEST("hostdev-pci-address", NONE);
DO_TEST("hostdev-pci-multifunction", NONE);
+ DO_TEST("hostdev-pci-multifunction-partial", NONE);
DO_TEST("hostdev-vfio", NONE);
DO_TEST("hostdev-vfio-zpci",
QEMU_CAPS_DEVICE_ZPCI,
--
2.21.0
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