On 5/25/2018 6:22 PM, Bjoern Walk wrote:
Cornelia Huck <coh...@redhat.com> [2018-05-24, 06:25PM +0200]:
On Thu, 24 May 2018 14:24:32 +0200
Xiao Feng Ren <renxi...@linux.vnet.ibm.com> wrote:
From: Yi Min Zhao <zyi...@linux.ibm.com>
This commit adds hotplug support for PCI devices on S390 guests.
There's no need to implement hot unplug for zPCI as QEMU implements
an unplug callback which will unplug both PCI and zPCI device in a
cascaded way.
Currently, the following PCI devices are supported:
virtio-blk-pci
virtio-net-pci
virtio-rng-pci
virtio-input-host-pci
virtio-keyboard-pci
virtio-mouse-pci
virtio-tablet-pci
vfio-pci
Shmem device
SCSIVhost device
Hm, how did you arrive at this list? Is it 'anything that uses msi-x'?
I guess it's just any device that libvirt actually supports hotplug for,
with a few exceptions (cf. patch 3 and 6). Not familiar wuth msi-x.
The list should be the devices that support MSI-X and have realized the
hotplug in qemu,
we support the hotplug for them in the libvirt. So the list will be
updated to:
virtio-blk-pci
virtio-net-pci
virtio-input-host-pci
virtio-keyboard-pci
virtio-mouse-pci
virtio-tablet-pci
vfio-pci
SCSIVhost device
As the model of Shmem is not support in qemu, the rng device doesn't
support MSI-X. So remove them.
In addition, the bug found need to be fixed for the hotplug of tablet,
in the virDomainDeviceIsUSB()
if ((t == VIR_DOMAIN_DEVICE_DISK &&
dev->data.disk->bus == VIR_DOMAIN_DISK_BUS_USB) ||
(t == VIR_DOMAIN_DEVICE_INPUT &&
dev->data.input->type == VIR_DOMAIN_INPUT_BUS_USB) ||
---------->dev->data.input->bus == VIR_DOMAIN_INPUT_BUS_USB
(t == VIR_DOMAIN_DEVICE_HOSTDEV &&
I will send the fix if this bug is agreed.
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