Commit 62ac4a52 authored by Thomas Huth's avatar Thomas Huth Committed by Cornelia Huck
Browse files

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: default avatarThomas Huth <thuth@linux.vnet.ibm.com>
Signed-off-by: default avatarCornelia Huck <cornelia.huck@de.ibm.com>
Reviewed-by: default avatarMichael S. Tsirkin <mst@redhat.com>
parent 6e7cd944

hw/s390x/css.c

+12 −0
Original line number Diff line number Diff line
@@ -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 |

hw/s390x/css.h

+1 −0
Original line number Diff line number Diff line
@@ -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;

};