From 334e76850bbbdc977656cc8a77ce101af00ba13d Mon Sep 17 00:00:00 2001 From: Dong Jia Shi Date: Wed, 17 May 2017 02:48:12 +0200 Subject: [PATCH] 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: Alex Williamson Signed-off-by: Dong Jia Shi Message-Id: <20170517004813.58227-13-bjsdjshi@linux.vnet.ibm.com> Signed-off-by: Cornelia Huck --- hw/vfio/ccw.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/hw/vfio/ccw.c b/hw/vfio/ccw.c index 007ce435f1..12d0262336 100644 --- a/hw/vfio/ccw.c +++ b/hw/vfio/ccw.c @@ -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); }