diff options
| author | Thomas Huth <thuth@linux.vnet.ibm.com> | 2014-12-11 14:25:11 +0100 |
|---|---|---|
| committer | Cornelia Huck <cornelia.huck@de.ibm.com> | 2015-06-30 09:34:58 +0200 |
| commit | 62ac4a52e27c706c860403fd1d8535a9a1073a19 (patch) | |
| tree | 60815d8231e9d3d7d8fc71c02deec5728f3edee9 /hw/s390x | |
| parent | 6e7cd94462d65405037c993fc4401d6fceed6660 (diff) | |
| download | qemu-62ac4a52e27c706c860403fd1d8535a9a1073a19.zip qemu-62ac4a52e27c706c860403fd1d8535a9a1073a19.tar.gz qemu-62ac4a52e27c706c860403fd1d8535a9a1073a19.tar.bz2 | |
s390x/css: Add a callback for when subchannel gets disabled
We need a possibility to run code when a subchannel gets disabled.
This patch adds the necessary infrastructure.
Signed-off-by: Thomas Huth <thuth@linux.vnet.ibm.com>
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Diffstat (limited to 'hw/s390x')
| -rw-r--r-- | hw/s390x/css.c | 12 | ||||
| -rw-r--r-- | hw/s390x/css.h | 1 |
2 files changed, 13 insertions, 0 deletions
diff --git a/hw/s390x/css.c b/hw/s390x/css.c index a9cf3d7..5df450e 100644 --- a/hw/s390x/css.c +++ b/hw/s390x/css.c @@ -588,6 +588,7 @@ int css_do_msch(SubchDev *sch, const 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, const 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, const 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: @@ -1498,6 +1506,10 @@ 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 7e53148..a09bb1f 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; }; |