Hi
I applied these pacches to libvirt tree
8077d64f964705c1034555abeea38773532b762f
And built a qemu-kvm from the upstream qemu-kvm tree version 0.14. I
tested these new binaries on my Redhat Enterprise Linux 6.1 GA.
Now I can have multiple function devices after I changed the VM XML
config file manually, please see the 'lspci' output below. Also, I can
hotplug one device, but it seems that unplugging it failed.
-------------------------------------------------------------------------------------
[root@kvm-rhel-6 qemu]# virsh qemu-monitor-command
kvm-rhel-6.1-multifunction-1 --hmp 'device_add
lsi,id=scsi10,bus=pci.0,addr=0x7.0x00'
VM: **In the VM, 'lspci" can see one line added:
VM: **00:07.0 SCSI storage controller: LSI logic / Symbios Logic 5sc895a
[root@kvm-rhel-6 qemu]# virsh qemu-monitor-command
kvm-rhel-6.1-multifunction-1 --hmp 'device_del
lsi,id=scsi10,bus=pci.0,addr=0x7.0x00'
Device 'lsi,id=scsi10,bus=pci.0,addr=0x7.0x00' not found
---------------------------------------------------------------------------------------------------------------
#lspci
00:00.0 Host bridge: Intel Corporation 440FX - 82441FX PMC [Natoma] (rev
02)
00:01.0 ISA bridge: Intel Corporation 82371SB PIIX3 ISA [Natoma/Triton II]
00:01.1 IDE interface: Intel Coporation 82371SB PIIX3 IDE [Natoma/Triton
II]
00:01.2 USB Controller: Intel Corporation 82371SB PIIX3 USB Natoma/Triton
II]
00:01.3 Bridge: Intel Corporation 82371AB/EB/MB PIIX4 ACPI (rev 03)
00:02.0 VGA compatible controller: Cirrus Logic GD 5446
00:03.0 Ethernet controller: Red Hat, Inc Virtio network device --->
function 0
00:03.1 Ethernet controller: Red Hat, Inc Virtio network device
00:03.2 Ethernet controller: Red Hat, Inc Virtio network device
00:03.3 Ethernet controller: Red Hat, Inc Virtio network device
00:03.4 Ethernet controller: Red Hat, Inc Virtio network device
00:03.5 Ethernet controller: Red Hat, Inc Virtio network device
00:03.6 Ethernet controller: Red Hat, Inc Virtio network device
00:03.7 Ethernet controller: Red Hat, Inc Virtio network device --->
function 7
00:04.0 Audio device: Intel Corporation 82801FB/FBM/FR/FW/FRW
(ICH6 Family)
High
00:05.0 SCSI storage controller: Red Hat, Inc Virtio bloc device
00:06.0 RAM memory: Red Hat, Inc Virtio memory balloon
Daniel P. Berrange:
On Fri, May 27, 2011 at 06:20:10PM +0800, Wen Congyang wrote:
We do not support to hot unplug multi function PCI device now. If the device is
one function of multi function PCI device, we shoul not allow to hot unplugg
it.
---
src/qemu/qemu_hotplug.c | 52 +++++++++++++++++++++++++++++++++++++++++++++++
1 files changed, 52 insertions(+), 0 deletions(-)
diff --git a/src/qemu/qemu_hotplug.c b/src/qemu/qemu_hotplug.c
index 3cf7d35..e98c677 100644
--- a/src/qemu/qemu_hotplug.c
+++ b/src/qemu/qemu_hotplug.c
@@ -1100,6 +1100,30 @@ static inline int qemuFindDisk(virDomainDefPtr def,
const char *dst)
return -1;
}
+static int qemuComparePCIDevice(virDomainDefPtr def ATTRIBUTE_UNUSED,
+ virDomainDeviceInfoPtr dev1,
+ void *opaque)
+{
+ virDomainDeviceInfoPtr dev2 = opaque;
+
+ if (dev1->type != VIR_DOMAIN_DEVICE_ADDRESS_TYPE_PCI ||
+ dev2->type != VIR_DOMAIN_DEVICE_ADDRESS_TYPE_PCI)
+ return 0;
+
+ if (dev1->addr.pci.slot == dev2->addr.pci.slot&&
+ dev1->addr.pci.function != dev2->addr.pci.function)
+ return -1;
+ return 0;
+}
+
+static bool qemuIsMultiFunctionDevice(virDomainDefPtr def,
+ virDomainDeviceInfoPtr dev)
+{
+ if (virDomainDeviceInfoIterate(def, qemuComparePCIDevice, dev)< 0)
+ return true;
+ return false;
+}
+
int qemuDomainDetachPciDiskDevice(struct qemud_driver *driver,
virDomainObjPtr vm,
@@ -1121,6 +1145,13 @@ int qemuDomainDetachPciDiskDevice(struct qemud_driver
*driver,
detach = vm->def->disks[i];
+ if (qemuIsMultiFunctionDevice(vm->def,&detach->info)) {
+ qemuReportError(VIR_ERR_OPERATION_FAILED,
+ _("cannot hot unplug multifunction PCI device: %s"),
+ dev->data.disk->dst);
+ goto cleanup;
+ }
+
if (qemuCgroupControllerActive(driver, VIR_CGROUP_CONTROLLER_DEVICES)) {
if (virCgroupForDomain(driver->cgroup, vm->def->name,&cgroup, 0) !=
0) {
qemuReportError(VIR_ERR_INTERNAL_ERROR,
@@ -1351,6 +1382,13 @@ int qemuDomainDetachPciControllerDevice(struct
qemud_driver *driver,
goto cleanup;
}
+ if (qemuIsMultiFunctionDevice(vm->def,&detach->info)) {
+ qemuReportError(VIR_ERR_OPERATION_FAILED,
+ _("cannot hot unplug multifunction PCI device: %s"),
+ dev->data.disk->dst);
+ goto cleanup;
+ }
+
if (qemuDomainControllerIsBusy(vm, detach)) {
qemuReportError(VIR_ERR_OPERATION_FAILED, "%s",
_("device cannot be detached: device is busy"));
@@ -1438,6 +1476,13 @@ int qemuDomainDetachNetDevice(struct qemud_driver
*driver,
goto cleanup;
}
+ if (qemuIsMultiFunctionDevice(vm->def,&detach->info)) {
+ qemuReportError(VIR_ERR_OPERATION_FAILED,
+ _("cannot hot unplug multifunction PCI device :%s"),
+ dev->data.disk->dst);
+ goto cleanup;
+ }
+
if ((vlan = qemuDomainNetVLAN(detach))< 0) {
qemuReportError(VIR_ERR_OPERATION_FAILED,
"%s", _("unable to determine original VLAN"));
@@ -1567,6 +1612,13 @@ int qemuDomainDetachHostPciDevice(struct qemud_driver
*driver,
return -1;
}
+ if (qemuIsMultiFunctionDevice(vm->def,&detach->info)) {
+ qemuReportError(VIR_ERR_OPERATION_FAILED,
+ _("cannot hot unplug multifunction PCI device: %s"),
+ dev->data.disk->dst);
+ return -1;
+ }
+
if (!virDomainDeviceAddressIsValid(&detach->info,
VIR_DOMAIN_DEVICE_ADDRESS_TYPE_PCI)) {
qemuReportError(VIR_ERR_OPERATION_FAILED,
ACK
Daniel
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