From: Thomas Huth <th...@linux.vnet.ibm.com> We need a possibility to run code when a subchannel gets disabled. This patch adds the necessary infrastructure.
Signed-off-by: Thomas Huth <th...@linux.vnet.ibm.com> Signed-off-by: Cornelia Huck <cornelia.h...@de.ibm.com> --- hw/s390x/css.c | 12 ++++++++++++ hw/s390x/css.h | 1 + 2 files changed, 13 insertions(+) diff --git a/hw/s390x/css.c b/hw/s390x/css.c index b67c039..735ec55 100644 --- a/hw/s390x/css.c +++ b/hw/s390x/css.c @@ -588,6 +588,7 @@ int css_do_msch(SubchDev *sch, SCHIB *orig_schib) { SCSW *s = &sch->curr_status.scsw; PMCW *p = &sch->curr_status.pmcw; + uint16_t oldflags; int ret; SCHIB schib; @@ -610,6 +611,7 @@ int css_do_msch(SubchDev *sch, SCHIB *orig_schib) copy_schib_from_guest(&schib, orig_schib); /* Only update the program-modifiable fields. */ p->intparm = schib.pmcw.intparm; + oldflags = p->flags; p->flags &= ~(PMCW_FLAGS_MASK_ISC | PMCW_FLAGS_MASK_ENA | PMCW_FLAGS_MASK_LM | PMCW_FLAGS_MASK_MME | PMCW_FLAGS_MASK_MP); @@ -625,6 +627,12 @@ int css_do_msch(SubchDev *sch, SCHIB *orig_schib) (PMCW_CHARS_MASK_MBFC | PMCW_CHARS_MASK_CSENSE); sch->curr_status.mba = schib.mba; + /* Has the channel been disabled? */ + if (sch->disable_cb && (oldflags & PMCW_FLAGS_MASK_ENA) != 0 + && (p->flags & PMCW_FLAGS_MASK_ENA) == 0) { + sch->disable_cb(sch); + } + ret = 0; out: @@ -1443,6 +1451,10 @@ void css_reset_sch(SubchDev *sch) { PMCW *p = &sch->curr_status.pmcw; + if ((p->flags & PMCW_FLAGS_MASK_ENA) != 0 && sch->disable_cb) { + sch->disable_cb(sch); + } + p->intparm = 0; p->flags &= ~(PMCW_FLAGS_MASK_ISC | PMCW_FLAGS_MASK_ENA | PMCW_FLAGS_MASK_LM | PMCW_FLAGS_MASK_MME | diff --git a/hw/s390x/css.h b/hw/s390x/css.h index 33104ac..7fa807b 100644 --- a/hw/s390x/css.h +++ b/hw/s390x/css.h @@ -81,6 +81,7 @@ struct SubchDev { uint8_t ccw_no_data_cnt; /* transport-provided data: */ int (*ccw_cb) (SubchDev *, CCW1); + void (*disable_cb)(SubchDev *); SenseId id; void *driver_data; }; -- 1.7.9.5 _______________________________________________ Virtualization mailing list Virtualization@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/virtualization