Commit 334e7685 authored by Dong Jia Shi's avatar Dong Jia Shi Committed by Cornelia Huck
Browse files

vfio/ccw: update sense data if a unit check is pending 



Concurrent-sense data is currently not delivered. This patch stores
the concurrent-sense data to the subchannel if a unit check is pending
and the concurrent-sense bit is enabled. Then a TSCH can retreive the
right IRB data back to the guest.

Acked-by: default avatarAlex Williamson <alex.williamson@redhat.com>
Signed-off-by: default avatarDong Jia Shi <bjsdjshi@linux.vnet.ibm.com>
Message-Id: <20170517004813.58227-13-bjsdjshi@linux.vnet.ibm.com>
Signed-off-by: default avatarCornelia Huck <cornelia.huck@de.ibm.com>
parent bab482d7

hw/vfio/ccw.c

+7 −0
Original line number Diff line number Diff line
@@ -94,6 +94,7 @@ static void vfio_ccw_io_notifier_handler(void *opaque) 
    CcwDevice *ccw_dev = CCW_DEVICE(cdev);

    SubchDev *sch = ccw_dev->sch;

    SCSW *s = &sch->curr_status.scsw;

    PMCW *p = &sch->curr_status.pmcw;

    IRB irb;

    int size;
@@ -143,6 +144,12 @@ static void vfio_ccw_io_notifier_handler(void *opaque) 
    /* Update control block via irb. */

    copy_scsw_to_guest(s, &irb.scsw);



    /* If a uint check is pending, copy sense data. */

    if ((s->dstat & SCSW_DSTAT_UNIT_CHECK) &&

        (p->chars & PMCW_CHARS_MASK_CSENSE)) {

        memcpy(sch->sense_data, irb.ecw, sizeof(irb.ecw));

    }



read_err:

    css_inject_io_interrupt(sch);

}