[PATCH RFC 0/2] vfio-ccw: exploit halt/clear subchannel support

[Cornelia Huck]

Hi,

this is the QEMU companion patchset to "vfio-ccw: support for {halt,clear}
subchannel", but is interface-wise independent of it.

With an old host kernel, things should work as before. With a new host
kernel, guest halt/clear requests should get passed through to the host.

I tested this with a hacked-up guest kernel to issue clears on demand.

Cornelia Huck (2):
  vfio-ccw: forward halt/clear to device if supported
  s390/css: add some tracing for pass-through handling

 hw/s390x/css.c         | 38 ++++++++++++++++++++++++++++++++++----
 hw/s390x/trace-events  |  4 ++++
 hw/vfio/ccw.c          | 11 +++++++++--
 include/hw/s390x/css.h | 10 +++++++---
 4 files changed, 54 insertions(+), 9 deletions(-)

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2.14.3