Lets put -chardev into use now. With this patch applied chardev:name is
accepted as chardev specification everywhere, i.e. now you can:
-chardev stdio,id=ttyS0
-serial chardev:ttyS0
which does the same as '-serial stdio".
Muxing can be done this way:
-chardev stdio,id=mux,mux=on
-serial chardev:mux
-monitor chardev:mux
You can mux more than two streams.
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
While being at it: create a new inet_dgram_opts() function for udp setup,
so udp can handle IPv6 now.
new cmd line syntax:
-chardev udp,id=name,host=remotehost,port=remoteport,\
localaddr=bindaddr,localport=bindport
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
new cmd line syntax:
unix socket:
-chardev socket,id=name,path=/path/to/socket
tcp socket:
-chardev socket,id=name,host=hostaddr|ipaddr,port=portnr
server and nowait options work as usual. Alternatively you can use
server=[on|off] + wait=[on|off] syntax.
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
start switching chardevs to QemuOpts. This patch adds the
infrastructure and converts the null device.
The patch brings two new functions:
qemu_chr_open_opts()
same as qemu_chr_open(), but uses QemuOpts instead of a
option char string.
qemu_chr_parse_compat()
accepts a traditional chardev option string, returns the
corresponding QemuOpts instance, to handle backward
compatibility.
The patch also adds a new -chardev switch which can be used to create
named+unconnected chardevs, like this:
-chardev null,id=test
This uses the new qemu_chr_open_opts. Thus with this patch alone only
the null device works. The other devices will follow ...
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
Now that do have a nicer interface to work against we can add Linux native
AIO support. It's an extremly thing layer just setting up an iocb for
the io_submit system call in the submission path, and registering an
eventfd with the qemu poll handler to do complete the iocbs directly
from there.
This started out based on Anthony's earlier AIO patch, but after
estimated 42,000 rewrites and just as many build system changes
there's not much left of it.
To enable native kernel aio use the aio=native sub-command on the
drive command line. I have also added an option to qemu-io to
test the aio support without needing a guest.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
Make -device switch use the QemuOpts framework.
Everything should continue to work like it did before.
New: "-set device.$id.$property=$value" works.
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
Message-Id:
One use case will be file for drives (no filename quoting issues), i.e.
-drive id=test,if=virtio
-set drive.test.file=/vmdisk/test-virtio.img
It will work for any other option (assuming handled by QemuOpts) though.
Except for id= for obvious reasons ;).
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
Message-Id:
