diff options
| author | Cornelia Huck <cohuck@redhat.com> | 2019-05-07 17:47:33 +0200 |
|---|---|---|
| committer | Cornelia Huck <cohuck@redhat.com> | 2019-06-24 17:27:57 +0200 |
| commit | 8fadea24de4ef83dd2db3a9cd06b384fd820b9db (patch) | |
| tree | aab722dbd72a8690a2cc024a879cd95802873656 /hw/s390x/css.c | |
| parent | b5e89f044dea477cef0f8bf5da52035369d95157 (diff) | |
| download | qemu-8fadea24de4ef83dd2db3a9cd06b384fd820b9db.zip | |
vfio-ccw: support async command subregion
A vfio-ccw device may provide an async command subregion for
issuing halt/clear subchannel requests. If it is present, use
it for sending halt/clear request to the device; if not, fall
back to emulation (as done today).
Reviewed-by: Farhan Ali <alifm@linux.ibm.com>
Message-Id: <20190613092542.2834-1-cohuck@redhat.com>
Reviewed-by: Eric Farman <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 | 27 |
1 files changed, 23 insertions, 4 deletions
diff --git a/hw/s390x/css.c b/hw/s390x/css.c index ad310b9f94..b92395f165 100644 --- a/hw/s390x/css.c +++ b/hw/s390x/css.c @@ -22,6 +22,7 @@ #include "trace.h" #include "hw/s390x/s390_flic.h" #include "hw/s390x/s390-virtio-ccw.h" +#include "hw/s390x/s390-ccw.h" typedef struct CrwContainer { CRW crw; @@ -1205,6 +1206,26 @@ static void sch_handle_start_func_virtual(SubchDev *sch) } +static void sch_handle_halt_func_passthrough(SubchDev *sch) +{ + int ret; + + ret = s390_ccw_halt(sch); + if (ret == -ENOSYS) { + sch_handle_halt_func(sch); + } +} + +static void sch_handle_clear_func_passthrough(SubchDev *sch) +{ + int ret; + + ret = s390_ccw_clear(sch); + if (ret == -ENOSYS) { + sch_handle_clear_func(sch); + } +} + static IOInstEnding sch_handle_start_func_passthrough(SubchDev *sch) { SCHIB *schib = &sch->curr_status; @@ -1244,11 +1265,9 @@ IOInstEnding do_subchannel_work_passthrough(SubchDev *sch) SCHIB *schib = &sch->curr_status; if (schib->scsw.ctrl & SCSW_FCTL_CLEAR_FUNC) { - /* TODO: Clear handling */ - sch_handle_clear_func(sch); + sch_handle_clear_func_passthrough(sch); } else if (schib->scsw.ctrl & SCSW_FCTL_HALT_FUNC) { - /* TODO: Halt handling */ - sch_handle_halt_func(sch); + sch_handle_halt_func_passthrough(sch); } else if (schib->scsw.ctrl & SCSW_FCTL_START_FUNC) { return sch_handle_start_func_passthrough(sch); } |