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Sat, 25 Jul 2026 15:27:09 +0000 (GMT) Received: from tuxmaker.boeblingen.de.ibm.com (unknown [9.87.85.9]) by smtpav02.fra02v.mail.ibm.com (Postfix) with SMTP; Sat, 25 Jul 2026 15:27:09 +0000 (GMT) Received: by tuxmaker.boeblingen.de.ibm.com (Postfix, from userid 4958) id 6310516267D; Sat, 25 Jul 2026 17:27:09 +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 v4 0/9] s390/vfio_ccw fixes Date: Sat, 25 Jul 2026 17:26:56 +0200 Message-ID: <20260725152705.3958100-1-farman@linux.ibm.com> X-Mailer: git-send-email 2.53.0 Precedence: bulk X-Mailing-List: linux-s390@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-GUID: dhC-Q7l60duuQL5wcY0IqblGDEw_WmsN X-Proofpoint-ORIG-GUID: dhC-Q7l60duuQL5wcY0IqblGDEw_WmsN X-Proofpoint-Spam-Info: AW1haW4tMjYwNzI1MDE0NCBTYWx0ZWRfX1FuQpXlAd9Wc V9wYcQBoUTOv9YRZ3ful0q1AYxvZVqo4QDDLWsOpkKcMccUuE0gx31kYZknUQ3rFYHJwwvBd20K TTIxUjRDMDaAeA5Mui4L/AdCxpvSh/o= X-Authority-Analysis: v=2.4 cv=dYuwG3Xe c=1 sm=1 tr=0 ts=6a64d5d2 cx=c_pps a=aDMHemPKRhS1OARIsFnwRA==:117 a=aDMHemPKRhS1OARIsFnwRA==:17 a=RAioF0-LDSMA:10 a=VkNPw1HP01LnGYTKEx00:22 a=RnoormkPH1_aCDwRdu11:22 a=U7nrCbtTmkRpXpFmAIza:22 a=VwQbUJbxAAAA:8 a=VnNF1IyMAAAA:8 a=Xq2SPA-IMpQdQLpMtacA:9 X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwNzI1MDE0NCBTYWx0ZWRfX6oeGnU3vGyFW B+0pfEhBej4IMzTlmolqqRog63O95XiXC/ZCUY9diyJPfb2OD6Sty7/9bnyqo6PTozjyq7vTzwI mx/3cMLa1DEnn7oqlLCHV/ifTYSs7T+MZR+RSvVS4ehwJud/EpVwc7yLR58v+KMC9x1P8KJ2hWH thfz0ptlfK+WblLf4uWCk4na4VgzIzYaQ7VDw+uyJmBaufekNELbZEitBUUxSML4oUXGmp/pglA ySqDgSfHXSlMpoLSfjHtrBqSeCOzK308mMZ5V8U4je64M3Svglq2j/Sqwg6WTfpdaaWNEsaW2XC EyAczr5Sq6dnvmbDnsQRQES91w/VKVa9EaFb1MLCzd3IhEtQvfqFqwCCZ1eNVjRQMfNLUy1DRdY WRPM/ne7acNW6qUdOAMp8urSC3gS+mreKEKJZEUG8Xwg/mtxAG/8Yqzcsw5qCXxdGHw4GMHhHfO zwy6ni9uDzkXJOmXtwg== 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=2026-07-25_04,2026-07-24_02,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 impostorscore=0 clxscore=1015 phishscore=0 malwarescore=0 spamscore=0 lowpriorityscore=0 bulkscore=0 suspectscore=0 adultscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2606150000 definitions=main-2607250144 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/ v3->v4: - [MR] Added r-b where provided (thank you!) - [MR] Make ccwchain_count unsigned - [MR] Reworked loop in ccwchain_calc_length() - [MR] Add boundary check before nospec clamp in async, crw, and schib r= egions - [MR] Add lockdep assertions where appropriate - [EF/MR] Add definitions of new fields in channel_program and vfio_ccw_= private - [sashiko/MR] Fix calculation of DMA address between Format-1 and Forma= t-2 IDA - [NEW][sashiko/EF] Defer cp_free() from fsm_notoper(), so it can be cal= led while holding sch->lock, without needing to dance with private->cp_mut= ex Eric Farman (9): 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: 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 | 30 +++++++-- drivers/s390/cio/vfio_ccw_cp.c | 96 ++++++++++++++++++++++------- drivers/s390/cio/vfio_ccw_cp.h | 10 +++ drivers/s390/cio/vfio_ccw_drv.c | 19 ++++++ drivers/s390/cio/vfio_ccw_fsm.c | 23 ++++--- drivers/s390/cio/vfio_ccw_ops.c | 21 +++++-- drivers/s390/cio/vfio_ccw_private.h | 10 +++ 8 files changed, 184 insertions(+), 41 deletions(-) --=20 2.53.0