Lines Matching full:virtio

1 Trace Agent for virtio-trace
7  - splice the page from write_pipe to virtio-console without memory copying
19     write the data to virtio-serial.
28 Makefile: Makefile of trace agent for virtio-trace
38 To use this trace agent for virtio-trace, we need to prepare some virtio-serial
42  virtio-trace uses virtio-serial pipe as trace data paths as to the number
44 	# mkdir /tmp/virtio-trace/
45 	# mkfifo /tmp/virtio-trace/trace-path-cpu{0,1,2,...,X}.{in,out}
46 	# mkfifo /tmp/virtio-trace/agent-ctl-path.{in,out}
53 2) Set up of virtio-serial pipe in a host
54  Add qemu option to use virtio-serial pipe.
56  ##virtio-serial device##
57      -device virtio-serial-pci,id=virtio-serial0\
59      -chardev pipe,id=charchannel0,path=/tmp/virtio-trace/agent-ctl-path\
60      -device virtserialport,bus=virtio-serial0.0,nr=1,chardev=charchannel0,\
63      -chardev pipe,id=charchannel1,path=/tmp/virtio-trace/trace-path-cpu0\
64      -device virtserialport,bus=virtio-serial0.0,nr=2,chardev=charchannel1,\
72 	   <source path='/tmp/virtio-trace/agent-ctl-path'/>
73 	   <target type='virtio' name='agent-ctl-path'/>
74 	   <address type='virtio-serial' controller='0' bus='0' port='0'/>
77 	   <source path='/tmp/virtio-trace/trace-path-cpu0'/>
78 	   <target type='virtio' name='trace-path-cpu0'/>
79 	   <address type='virtio-serial' controller='0' bus='0' port='1'/>
87  You can find some chardev in /dev/virtio-ports/ in the guest.
107 	# cat /tmp/virtio-trace/trace-path-cpu0.out
108 If a host does not open these, trace data get stuck in buffers of virtio. Then,
113  A host injects read start order to the guest via virtio-serial.
114 	# echo 1 > /tmp/virtio-trace/agent-ctl-path.in
117  A host injects read stop order to the guest via virtio-serial.
118 	# echo 0 > /tmp/virtio-trace/agent-ctl-path.in