[v1,0/1] s390x: css: report errors from ccw_dstream_read/write

Message

Pierre Morel April 6, 2021, 7:44 a.m. UTC

By checking the results of errors on SSCH in the kvm-unit-tests
We noticed that no error was reported when a SSCH is started
to access addresses not existing in the guest.
For exemple accessing 3G on a guest with 1G memory.

If we look at QEMU ccw_dstream_write/write functions we see that they
are often not checked for error in various places.
  
It follows that accessing an invalid address does not trigger a
subchannel status program check to the guest as it should.

Regards,
Pierre
 

Pierre Morel (1):
  s390x: css: report errors from ccw_dstream_read/write

 hw/char/terminal3270.c | 11 +++++--
 hw/s390x/3270-ccw.c    |  3 ++
 hw/s390x/css.c         | 16 +++++-----
 hw/s390x/virtio-ccw.c  | 66 ++++++++++++++++++++++++++++++------------
 4 files changed, 69 insertions(+), 27 deletions(-)