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Fri, 17 Apr 2020 18:36:25 +0000 (GMT) Received: from localhost.localdomain.com (unknown [9.85.151.210]) by b03ledav006.gho.boulder.ibm.com (Postfix) with ESMTP; Fri, 17 Apr 2020 18:36:25 +0000 (GMT) From: Jared Rossi To: Eric Farman , Cornelia Huck Subject: [PATCH 1/1] vfio-ccw: Enable transparent CCW IPL from DASD Date: Fri, 17 Apr 2020 14:38:38 -0400 Message-Id: <20200417183838.11796-2-jrossi@linux.ibm.com> X-Mailer: git-send-email 2.21.1 In-Reply-To: <20200417183838.11796-1-jrossi@linux.ibm.com> References: <20200417183838.11796-1-jrossi@linux.ibm.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-TM-AS-GCONF: 00 X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.138, 18.0.676 definitions=2020-04-17_08:2020-04-17, 2020-04-17 signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 spamscore=0 clxscore=1015 lowpriorityscore=0 priorityscore=1501 phishscore=0 impostorscore=0 mlxlogscore=999 bulkscore=0 suspectscore=0 adultscore=0 mlxscore=0 malwarescore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2003020000 definitions=main-2004170142 X-detected-operating-system: by eggs.gnu.org: GNU/Linux 3.x [generic] X-Received-From: 148.163.158.5 X-Mailman-Approved-At: Fri, 17 Apr 2020 16:37:31 -0400 X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: qemu-s390x@nongnu.org, qemu-devel@nongnu.org Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" Content-Type: text/plain; charset="utf-8" Remove the explicit prefetch check when using vfio-ccw devices. This check is not needed as all Linux channel programs are intended to use prefetch and will be executed in the same way regardless. Signed-off-by: Jared Rossi --- hw/vfio/ccw.c | 13 +++---------- 1 file changed, 3 insertions(+), 10 deletions(-) diff --git a/hw/vfio/ccw.c b/hw/vfio/ccw.c index 50cc2ec75c..e649377b68 100644 --- a/hw/vfio/ccw.c +++ b/hw/vfio/ccw.c @@ -74,16 +74,9 @@ static IOInstEnding vfio_ccw_handle_request(SubchDev *sc= h) struct ccw_io_region *region =3D vcdev->io_region; int ret; =20 - if (!(sch->orb.ctrl0 & ORB_CTRL0_MASK_PFCH)) { - if (!(vcdev->force_orb_pfch)) { - warn_once_pfch(vcdev, sch, "requires PFCH flag set"); - sch_gen_unit_exception(sch); - css_inject_io_interrupt(sch); - return IOINST_CC_EXPECTED; - } else { - sch->orb.ctrl0 |=3D ORB_CTRL0_MASK_PFCH; - warn_once_pfch(vcdev, sch, "PFCH flag forced"); - } + if (!(sch->orb.ctrl0 & ORB_CTRL0_MASK_PFCH) && vcdev->force_orb_pfch) { + sch->orb.ctrl0 |=3D ORB_CTRL0_MASK_PFCH; + warn_once_pfch(vcdev, sch, "PFCH flag forced"); } =20 QEMU_BUILD_BUG_ON(sizeof(region->orb_area) !=3D sizeof(ORB)); --=20 2.21.1