On Wed, 22 Feb 2017 13:15:19 +0100 Cornelia Huck <cornelia.h...@de.ibm.com> wrote:
> Initial support for channel-attached 3270 devices (yes, these are the > classic 'green-screen' consoles). Acks/reviews for the telnet integration > (tn3270) are especially solicited. > > To actually make use of this, you need a 3270 emulator (for example, > x3270). You can use the 3270 in a Linux guest either as a console > (probably not very useful) or as an additional tty (described below). > > Limitations: > The 3270 feature is experimental and it only supports one 3270 device, > Linux as guest, x3270 as client. It doesn't support live migration, > SSL/TLS encryption, or x3270 client resizing when re-connecting. Multiple > commands in one inbound packet, which are usually caused by pressing the > "Reset" key during poor network traffic, are not supported right now. > Currently, we terminate the connection in that case. > > Usage: > Configure a device, for example with the following command line: > -chardev socket,id=char_0,host=0.0.0.0,port=23,nowait,server,tn3270 \ > -device x-terminal3270,chardev=char_0,devno=fe.0.000a,id=terminal_0 > > The guest needs to be configured in the following way: > - Make sure that the 3270 channel device is activated (e.g. via > chccwdev -e 0.0.000a for the example above). > - Start a getty on the respective device node under /dev/3270/ once > it shows up. > > After starting the guest via qemu, connect x3270 to <host ip>:<port>. Some more verbose documentation here: http://wiki.qemu-project.org/Features/3270 (Not sure yet where to hook this up inside the wiki.) > > Jing Liu (6): > chardev: Basic support for TN3270 > s390x/css: Add an algorithm to find a free chpid > s390x/3270: 3270 data stream handling > s390x/3270: Add the TCP socket events handler for 3270 > s390x/3270: Detect for continued presence of a 3270 client > s390x/3270: Mark non-migratable and enable the device > > Yang Chen (2): > s390x/3270: Add abstract emulated ccw-attached 3270 device > s390x/3270: Add emulated terminal3270 device > > chardev/char-socket.c | 76 +++++++--- > chardev/char.c | 11 +- > default-configs/s390x-softmmu.mak | 1 + > hw/char/Makefile.objs | 1 + > hw/char/terminal3270.c | 293 > ++++++++++++++++++++++++++++++++++++++ > hw/s390x/3270-ccw.c | 169 ++++++++++++++++++++++ > hw/s390x/Makefile.objs | 1 + > hw/s390x/css.c | 24 ++++ > include/hw/s390x/3270-ccw.h | 53 +++++++ > include/hw/s390x/css.h | 2 + > include/sysemu/char.h | 8 ++ > qapi-schema.json | 3 + > 12 files changed, 620 insertions(+), 22 deletions(-) > create mode 100644 hw/char/terminal3270.c > create mode 100644 hw/s390x/3270-ccw.c > create mode 100644 include/hw/s390x/3270-ccw.h >
