From Fedora Project Wiki
VirtioSerial Testing
Test matrix:
Guest (i386 & x86_64):
Linux – RHEL6
Windows
virtio console ( virtio serial, vmchannel... )
a simple device for data input and out
Virtio architecture [1]:
front end :
linux : kernel >= 2.6.32-13.el6
windows : need driver
backend :
qemu-kvm >= 0.12.1.2-2.12.el6
Virtio-serial is just the transport protocol that will enable such applications to be written.It has two parts:
(a) device emulation in qemu that presents a virtio-pci device to the guest and
(b) a guest driver that presents a char device interface to userspace applications.
How it work :
guest :
install front end driver
qemu cli :
-device virtio-serial-pci,id=virtio-serial0,max_ports=16,vectors=4,bus=pci.0,addr=0x4
^driver ~~~~~~~~~~~~~~~~~~~~~~
device option
-chardev pty,id=channel0
-device virtserialport,chardev=channel0,name=org.linux-kvm.port.0,bus=virtio-serial0.0
^driver ^ride on bus
check device information from QEMU command line :
(QEMU) info qtree
(QEMU) info pci
check device information from guest :
#lspci
#/sys/class/virtio-ports/*/name
To Be Test :
Basic functional testing [3]
- Amit's test suite from http://fedorapeople.org/gitweb?p=amitshah/public_git/test-virtserial.git
- Spawn a virtioconsole, Work on the console
- Spawn multiple virtioconsoles
- Transfer files from the host to the guest (and vice-versa) over virtio-serial ports
- Try all of the above at the same time
- Try the above with different guest smp options
- Hot-plug / Hot-unplug
Using the qemu monitor, ports can be hot-plugged as well as unplugged:
(qemu) device_add virtserialport,name=port.0,id=port0
(qemu) device_del port0
Survive basic guest operation
- live migration
- offline migration
- guest reboot/shutdown/kdump
- guest s3/s4
Dynamic add/remove
- remove/load guest driver
- add/remove device from qemu command
device add and survive reboot
device delete and survive reboot
create MAX number of ports ( default max=31)
add existed device
remove unexisted device
Performance
- X MB/s
TBD :
test window front driver with spice.