diff options
| author | Farhan Ali <alifm@linux.ibm.com> | 2020-05-05 14:57:54 +0200 |
|---|---|---|
| committer | Cornelia Huck <cohuck@redhat.com> | 2020-06-18 12:13:54 +0200 |
| commit | 46ea3841edaff2a7657b8f6c7f474e5e3850cd62 (patch) | |
| tree | 4677779b12e978ec704fd3251889d93595b9c475 /hw/s390x/css.c | |
| parent | 2a3b9cbaa7b25a4db4cdcfe1c65279c5464f2923 (diff) | |
vfio-ccw: Add support for the schib region
The schib region can be used to obtain the latest SCHIB from the host
passthrough subchannel. Since the guest SCHIB is virtualized,
we currently only update the path related information so that the
guest is aware of any path related changes when it issues the
'stsch' instruction.
Signed-off-by: Farhan Ali <alifm@linux.ibm.com>
Signed-off-by: Eric Farman <farman@linux.ibm.com>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Message-Id: <20200505125757.98209-4-farman@linux.ibm.com>
Signed-off-by: Cornelia Huck <cohuck@redhat.com>
Diffstat (limited to 'hw/s390x/css.c')
| -rw-r--r-- | hw/s390x/css.c | 13 |
1 files changed, 11 insertions, 2 deletions
diff --git a/hw/s390x/css.c b/hw/s390x/css.c index 5d8e08667e..a44faa3549 100644 --- a/hw/s390x/css.c +++ b/hw/s390x/css.c @@ -1335,11 +1335,20 @@ static void copy_schib_to_guest(SCHIB *dest, const SCHIB *src) } } -int css_do_stsch(SubchDev *sch, SCHIB *schib) +IOInstEnding css_do_stsch(SubchDev *sch, SCHIB *schib) { + int ret; + + /* + * For some subchannels, we may want to update parts of + * the schib (e.g., update path masks from the host device + * for passthrough subchannels). + */ + ret = s390_ccw_store(sch); + /* Use current status. */ copy_schib_to_guest(schib, &sch->curr_status); - return 0; + return ret; } static void copy_pmcw_from_guest(PMCW *dest, const PMCW *src) |