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Sun, 26 Jul 2026 17:21:56 +0000 (GMT) Received: from tuxmaker.boeblingen.de.ibm.com (unknown [9.87.85.9]) by smtpav01.fra02v.mail.ibm.com (Postfix) with SMTP; Sun, 26 Jul 2026 17:21:56 +0000 (GMT) Received: by tuxmaker.boeblingen.de.ibm.com (Postfix, from userid 4958) id 7DC70160392; Sun, 26 Jul 2026 19:21:56 +0200 (CEST) From: Eric Farman To: linux-s390@vger.kernel.org, kvm@vger.kernel.org, linux-kernel@vger.kernel.org Cc: Matthew Rosato , Halil Pasic , Christian Borntraeger , Eric Farman Subject: [PATCH v6 00/10] s390/vfio_ccw fixes Date: Sun, 26 Jul 2026 19:21:43 +0200 Message-ID: <20260726172153.1818056-1-farman@linux.ibm.com> X-Mailer: git-send-email 2.53.0 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-TM-AS-GCONF: 00 X-Proofpoint-ORIG-GUID: QvZSceEkiRdNheE7PWHaRy54nhe1X0Qi X-Proofpoint-Spam-Info: AW1haW4tMjYwNzI2MDE3NSBTYWx0ZWRfX/AK0gqB360O+ 6+MZy5VSHKzLHAL8Mq9ZUiq/AQP35yO3pepjRzaygHMr+NRqxeNZlSiPdhV6FoH3KP67u7xuWcn 6FHo/XFAqTKYaHyCgrlCgobIhPZsO9E= X-Authority-Analysis: v=2.4 cv=E/z9Y6dl c=1 sm=1 tr=0 ts=6a664239 cx=c_pps a=aDMHemPKRhS1OARIsFnwRA==:117 a=aDMHemPKRhS1OARIsFnwRA==:17 a=RAioF0-LDSMA:10 a=VkNPw1HP01LnGYTKEx00:22 a=RnoormkPH1_aCDwRdu11:22 a=RzCfie-kr_QcCd8fBx8p:22 a=VwQbUJbxAAAA:8 a=VnNF1IyMAAAA:8 a=Xq2SPA-IMpQdQLpMtacA:9 X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwNzI2MDE3NSBTYWx0ZWRfX1hnIekvtsDvY ENmVf0zcH3U/8oXUo8r+rjR3G2LJZTp3kUSj38xAuEd6L2sxRNuTgm2AdvruXSCj6iVTv4LfzXp PIy1L4eXmpBoU/SXAisdXpYKO7rySqaqzx2nDMvOnAYJVAbF89NE/MV9xEVdcy8qE5xWfGnfTw7 Luv9/zy05ZYWxGLn1vDEnVqLEOUk6Zf6yTEr8yw3nwkW+x/MJyWo8e27wKX6D4unO8biESJfijC m7muonE39yjmpPXAlbCnhxUU/zcpZY83Z5RtI+0gj1L9PbxDF02/CNaTWzT9LbLD+48l2cYWgpG gSg+zk6YArXvQr4jzktKh5DypOAp7H6L2th/K6m/+XGIJ7tUNaCMtgsbJ8ArCHsERLWZMrTbLlS +A9ptf6mfl/bMfsyWacbkdpJFIXg3ZD+ENkkcBQo9ObAl6kjoxCLCNaHZ+MeqGEBYwPOQCUxwA0 MRdUpaEato1dRtejySA== X-Proofpoint-GUID: QvZSceEkiRdNheE7PWHaRy54nhe1X0Qi X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1143,Hydra:6.1.134,FMLib:17.12.100.49 definitions=2026-07-26_05,2026-07-24_02,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 adultscore=0 priorityscore=1501 spamscore=0 clxscore=1015 phishscore=0 lowpriorityscore=0 bulkscore=0 malwarescore=0 impostorscore=0 suspectscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2606150000 definitions=main-2607260175 This series addresses some pre-existing issues found in the s390 vfio_ccw (DASD passthrough) driver. v1: https://lore.kernel.org/r/20260714232208.1683788-1-farman@linux.ibm.c= om/ v2: https://lore.kernel.org/r/20260720201931.976660-1-farman@linux.ibm.co= m/ v3: https://lore.kernel.org/r/20260723174751.1180334-1-farman@linux.ibm.c= om/ v4: https://lore.kernel.org/r/20260725152705.3958100-1-farman@linux.ibm.c= om/ v5: https://lore.kernel.org/r/20260726040129.2946151-1-farman@linux.ibm.c= om/ v5->v6: - [sashiko] Add cancel_work_sync() to vfio_ccw_mdev_close_dev() as the "= usual" cleanup, and keep them in vfio_ccw_mdev_release_dev() to cover corner = cases - [MR; offlist] Remove the proposed notoper_work queue, and move the cp_= free from the FSM to vfio_ccw_mdev_close_dev() to ensure we cover the case = where a device becomes not operational (due to sch_event) while I/O is in fl= ight.=20 Eric Farman (10): s390/vfio_ccw: free all memory if cp_init() fails s390/vfio_ccw: limit the number of channel program segments s390/vfio_ccw: fix out of bounds check on CCW array s390/vfio_ccw: ensure first IDAW remains constant s390/vfio_ccw: calculate idal length based on idaw type s390/vfio_ccw: ensure index for read/write regions are within range s390/vfio_ccw: cancel existing workqueues s390/vfio_ccw: move cp cleanup out of not operational s390/vfio_ccw: implement a channel program mutex s390/vfio_ccw: implement a crw lock drivers/s390/cio/vfio_ccw_async.c | 16 +++++ drivers/s390/cio/vfio_ccw_chp.c | 31 ++++++++-- drivers/s390/cio/vfio_ccw_cp.c | 96 ++++++++++++++++++++++------- drivers/s390/cio/vfio_ccw_cp.h | 10 +++ drivers/s390/cio/vfio_ccw_drv.c | 10 +++ drivers/s390/cio/vfio_ccw_fsm.c | 23 ++++--- drivers/s390/cio/vfio_ccw_ops.c | 40 ++++++++++-- drivers/s390/cio/vfio_ccw_private.h | 7 +++ 8 files changed, 191 insertions(+), 42 deletions(-) --=20 2.53.0