From mboxrd@z Thu Jan 1 00:00:00 1970 From: Alex Williamson Subject: Re: [PATCH v7 12/13] vfio/ccw: update sense data if a unit check is pending Date: Thu, 11 May 2017 15:49:15 -0600 Message-ID: <20170511154915.75d7f4b1@w520.home> References: <20170505020352.8984-1-bjsdjshi@linux.vnet.ibm.com> <20170505020352.8984-13-bjsdjshi@linux.vnet.ibm.com> Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <20170505020352.8984-13-bjsdjshi@linux.vnet.ibm.com> Sender: kvm-owner@vger.kernel.org List-Archive: List-Post: To: Dong Jia Shi Cc: kvm@vger.kernel.org, linux-s390@vger.kernel.org, qemu-devel@nongnu.org, cornelia.huck@de.ibm.com, borntraeger@de.ibm.com, agraf@suse.com, eric.auger@redhat.com List-ID: On Fri, 5 May 2017 04:03:51 +0200 Dong Jia Shi wrote: > 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. > > Signed-off-by: Dong Jia Shi > --- Acked-by: Alex Williamson > hw/vfio/ccw.c | 7 +++++++ > 1 file changed, 7 insertions(+) > > diff --git a/hw/vfio/ccw.c b/hw/vfio/ccw.c > index 3c8b518..73f326f 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); > }