From 61a3d5eded4af9e4cc8d779672891eba8d94879c Mon Sep 17 00:00:00 2001 From: Cornelia Huck Date: Thu, 30 Apr 2020 13:35:43 +0200 Subject: docs/s390x: document 3270 Add some basic info how to use 3270 devices. Message-Id: <20200515151518.83950-3-cohuck@redhat.com> Reviewed-by: Thomas Huth Signed-off-by: Cornelia Huck --- docs/system/s390x/3270.rst | 32 ++++++++++++++++++++++++++++++++ 1 file changed, 32 insertions(+) create mode 100644 docs/system/s390x/3270.rst (limited to 'docs/system/s390x') diff --git a/docs/system/s390x/3270.rst b/docs/system/s390x/3270.rst new file mode 100644 index 0000000000..1774cdcadf --- /dev/null +++ b/docs/system/s390x/3270.rst @@ -0,0 +1,32 @@ +3270 devices +============ + +QEMU supports connecting an external 3270 terminal emulator (such as +``x3270``) to make a single 3270 device available to a guest. Note that this +supports basic features only. + +To provide a 3270 device to a guest, create a ``x-terminal3270`` linked to +a ``tn3270`` chardev. The guest will see a 3270 channel device. In order +to actually be able to use it, attach the ``x3270`` emulator to the chardev. + +Example configuration +--------------------- + +* Add a ``tn3270`` chardev and a ``x-terminal3270`` to the QEMU command line:: + + -chardev socket,id=char_0,host=0.0.0.0,port=2300,nowait,server,tn3270 + -device x-terminal3270,chardev=char_0,devno=fe.0.000a,id=terminal_0 + +* Start the guest. In the guest, use ``chccwdev -e 0.0.000a`` to enable + the device. + +* On the host, start the ``x3270`` emulator:: + + x3270 :2300 + +* In the guest, locate the 3270 device node under ``/dev/3270/`` (say, + ``tty1``) and start a getty on it:: + + systemctl start serial-getty@3270-tty1.service + +This should get you an addtional tty for logging into the guest. -- cgit v1.2.3