[v1,0/3] s390x: css: adapting the I/O tests for PV

Message

Pierre Morel Aug. 31, 2020, 12:05 p.m. UTC

To adapt the test for PV we need to share the I/O memory with the host.

To do so we:
- implement the share/unshare ultravisor code.
- implement dedicated allocation routine which make sure that
  - the I/O memory is on dedicated pages
  - the I/O memory is shared if the guest is run under PV
- replace the start_single_ccw() by ccw_alloc() and start the
  start_ccw1_chain() directly from the test function.
  This allows to correctly free the I/O memory after the interruption.

Best regards,
Pierre

Pierre Morel (3):
  s390x: pv: implement routine to share/unshare memory
  s390: define UV compatible I/O allocation
  s390x: css: pv: css test adaptation for PV

 lib/s390x/asm/uv.h    | 33 +++++++++++++++++++++++++++
 lib/s390x/css.h       |  3 +--
 lib/s390x/css_lib.c   | 28 +++++++----------------
 lib/s390x/malloc_io.c | 53 +++++++++++++++++++++++++++++++++++++++++++
 lib/s390x/malloc_io.h | 14 ++++++++++++
 s390x/Makefile        |  1 +
 s390x/css.c           | 35 +++++++++++++++++++---------
 7 files changed, 134 insertions(+), 33 deletions(-)
 create mode 100644 lib/s390x/malloc_io.c
 create mode 100644 lib/s390x/malloc_io.h