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GET /api/patches/2195947/?format=api
{ "id": 2195947, "url": "http://patchwork.ozlabs.org/api/patches/2195947/?format=api", "web_url": "http://patchwork.ozlabs.org/project/linux-pci/patch/20260212-vfio_pci_ism-v1-1-333262ade074@linux.ibm.com/", "project": { "id": 28, "url": "http://patchwork.ozlabs.org/api/projects/28/?format=api", "name": "Linux PCI development", "link_name": "linux-pci", "list_id": "linux-pci.vger.kernel.org", "list_email": "linux-pci@vger.kernel.org", "web_url": null, "scm_url": null, "webscm_url": null, "list_archive_url": "", "list_archive_url_format": "", "commit_url_format": "" }, "msgid": "<20260212-vfio_pci_ism-v1-1-333262ade074@linux.ibm.com>", "list_archive_url": null, "date": "2026-02-12T14:02:15", "name": "[1/3] vfio/pci: Set VFIO_PCI_OFFSET_SHIFT to 48", "commit_ref": null, "pull_url": null, "state": "new", "archived": false, "hash": "98ac0f860e5e97478508ca28a4e59666ee2e2715", "submitter": { "id": 91782, "url": "http://patchwork.ozlabs.org/api/people/91782/?format=api", "name": "Julian Ruess", "email": "julianr@linux.ibm.com" }, "delegate": null, "mbox": "http://patchwork.ozlabs.org/project/linux-pci/patch/20260212-vfio_pci_ism-v1-1-333262ade074@linux.ibm.com/mbox/", "series": [ { "id": 491980, "url": "http://patchwork.ozlabs.org/api/series/491980/?format=api", "web_url": "http://patchwork.ozlabs.org/project/linux-pci/list/?series=491980", "date": "2026-02-12T14:02:17", "name": "vfio/pci: Introduce vfio_pci driver for ISM devices", "version": 1, "mbox": "http://patchwork.ozlabs.org/series/491980/mbox/" } ], "comments": "http://patchwork.ozlabs.org/api/patches/2195947/comments/", "check": "pending", "checks": "http://patchwork.ozlabs.org/api/patches/2195947/checks/", "tags": {}, "related": [], "headers": { "Return-Path": "\n <linux-pci+bounces-47209-incoming=patchwork.ozlabs.org@vger.kernel.org>", "X-Original-To": [ "incoming@patchwork.ozlabs.org", "linux-pci@vger.kernel.org" ], "Delivered-To": "patchwork-incoming@legolas.ozlabs.org", "Authentication-Results": [ "legolas.ozlabs.org;\n\tdkim=pass (2048-bit key;\n unprotected) header.d=ibm.com header.i=@ibm.com header.a=rsa-sha256\n header.s=pp1 header.b=cEACVcTX;\n\tdkim-atps=neutral", "legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=vger.kernel.org\n (client-ip=2600:3c0a:e001:db::12fc:5321; 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a=rsa-sha256; c=relaxed/relaxed; d=ibm.com; h=cc\n\t:content-transfer-encoding:content-type:date:from:in-reply-to\n\t:message-id:mime-version:references:subject:to; s=pp1; bh=mhB6RF\n\toPQK8dVzbsRqsEX6IfqiK9Fcw9WsnO2/SS6IQ=; b=cEACVcTXq43FhjX/ng0t5b\n\tpdozQtOsmKEx06Qq7i3e1Hfgu4dUxWBNVckEBry9nbHhFW28uDgBRJH8trgJXrde\n\t7y4Y+EZrAp0UVy7MyVrODW1uDkmYKCjLBJQveBzrdHImRQffBHkJOFpwjhHGuJB6\n\tSiD62Sah/l7Db3TnixotSjlZZN03A0UZh66pp8Ydrk7AGUbSLWLfTEDv9CEje7Gn\n\t1k9SRfaNEX+Bk+WfNzhRAsyFlb8QZUU/ujhUU4f1kyoNyHG1mVQXTDjzjQUXqmcA\n\t9ymprvZKNPZ2Odup4sbRYIqJtxlmda+PQMd38BYIBc+541gH2z9zDd6rzYQiIASQ\n\t==", "From": "Julian Ruess <julianr@linux.ibm.com>", "Date": "Thu, 12 Feb 2026 15:02:15 +0100", "Subject": "[PATCH 1/3] vfio/pci: Set VFIO_PCI_OFFSET_SHIFT to 48", "Precedence": "bulk", "X-Mailing-List": "linux-pci@vger.kernel.org", "List-Id": "<linux-pci.vger.kernel.org>", "List-Subscribe": "<mailto:linux-pci+subscribe@vger.kernel.org>", "List-Unsubscribe": "<mailto:linux-pci+unsubscribe@vger.kernel.org>", "MIME-Version": "1.0", "Content-Type": "text/plain; charset=\"utf-8\"", "Content-Transfer-Encoding": "7bit", "Message-Id": "<20260212-vfio_pci_ism-v1-1-333262ade074@linux.ibm.com>", "References": "<20260212-vfio_pci_ism-v1-0-333262ade074@linux.ibm.com>", "In-Reply-To": "<20260212-vfio_pci_ism-v1-0-333262ade074@linux.ibm.com>", "To": "schnelle@linux.ibm.com, wintera@linux.ibm.com, ts@linux.ibm.com,\n oberpar@linux.ibm.com, gbayer@linux.ibm.com,\n Alex Williamson <alex@shazbot.org>, Jason Gunthorpe <jgg@ziepe.ca>,\n Yishai Hadas <yishaih@nvidia.com>,\n Shameer Kolothum <skolothumtho@nvidia.com>,\n Kevin Tian <kevin.tian@intel.com>", "Cc": "mjrosato@linux.ibm.com, alifm@linux.ibm.com, raspl@linux.ibm.com,\n hca@linux.ibm.com, agordeev@linux.ibm.com, gor@linux.ibm.com,\n julianr@linux.ibm.com, kvm@vger.kernel.org,\n linux-kernel@vger.kernel.org, linux-s390@vger.kernel.org,\n linux-pci@vger.kernel.org", "X-Mailer": "b4 0.14.2", "X-TM-AS-GCONF": "00", "X-Proofpoint-GUID": "fv3arNPVHzcKc8BmdOyKW6B-d1ksJ0l7", "X-Proofpoint-ORIG-GUID": "fv3arNPVHzcKc8BmdOyKW6B-d1ksJ0l7", "X-Authority-Analysis": "v=2.4 cv=JdWxbEKV c=1 sm=1 tr=0 ts=698ddd7b cx=c_pps\n a=aDMHemPKRhS1OARIsFnwRA==:117 a=aDMHemPKRhS1OARIsFnwRA==:17\n a=IkcTkHD0fZMA:10 a=HzLeVaNsDn8A:10 a=VkNPw1HP01LnGYTKEx00:22\n a=Mpw57Om8IfrbqaoTuvik:22 a=GgsMoib0sEa3-_RKJdDe:22 a=VnNF1IyMAAAA:8\n a=modniqXMBZv9BQ1X5YgA:9 a=QEXdDO2ut3YA:10", "X-Proofpoint-Spam-Details-Enc": "AW1haW4tMjYwMjEyMDEwNCBTYWx0ZWRfXwLduAeLBOgD0\n s7s1iJarvhbtDEp0HnZR88d8BWjr8OcFYH14Drr2PlzcDTfIQVw8qCjY8K6VaacbxG84SVjxBTD\n M40uX2I35PMDxk1nHEN8ELesZsYrOGnh9C6acIFvUZgk0h+psJ5oNH7WOzReqNmu/qfz5KExg3X\n paJv6mtOkUkLin6zGiPXyNmGa9UneXA7YWF+Jznknv0F8H8u9gF+ZBY65fjOPKu7uZgq/dAYV6o\n TdQrSeobKEbgmcSndVe+0wDaey5LE2QajnfS73DyjmX+BCZHS47l5gaESjH8nHwXlrHQVpDi3lN\n 0vB3a3HYn8Yg2fqj2LHu2X+a4yU9hbc9TNwG76i/ZnbS8K6VqV9xwImeWay1+rOkaAgnX9Us5qB\n vVVnxAK7HnU4Lg1gH4KfiOzaENgQYJmdAsSlb3LUFOdA+mHnnDsv5g4KuiT+1zle0gem50pu/zN\n uP3yPyXLq6WWyPjYV5A==", "X-Proofpoint-Virus-Version": "vendor=baseguard\n engine=ICAP:2.0.293,Aquarius:18.0.1121,Hydra:6.1.51,FMLib:17.12.100.49\n definitions=2026-02-12_04,2026-02-12_02,2025-10-01_01", "X-Proofpoint-Spam-Details": "rule=outbound_notspam policy=outbound score=0\n priorityscore=1501 clxscore=1011 impostorscore=0 bulkscore=0\n lowpriorityscore=0 suspectscore=0 adultscore=0 spamscore=0 malwarescore=0\n phishscore=0 classifier=typeunknown authscore=0 authtc= authcc=\n route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2601150000\n definitions=main-2602120104" }, "content": "Extend VFIO_PCI_OFFSET_SHIFT to 48 to use the vfio-pci\nVFIO_PCI_OFFSET_TO_INDEX() mechanism with the 256 TiB pseudo-BAR 0 of\nthe ISM device on s390. This bar is never mapped.\n\nAcked-by: Alexandra Winter <wintera@linux.ibm.com>\nSigned-off-by: Julian Ruess <julianr@linux.ibm.com>\n---\n drivers/vfio/pci/vfio_pci_core.c | 4 ++--\n include/linux/vfio_pci_core.h | 2 +-\n 2 files changed, 3 insertions(+), 3 deletions(-)", "diff": "diff --git a/drivers/vfio/pci/vfio_pci_core.c b/drivers/vfio/pci/vfio_pci_core.c\nindex 3a11e6f450f70105f17a3a621520c195d99e0671..3d70bf6668c7a69c4b46674195954d1ada662006 100644\n--- a/drivers/vfio/pci/vfio_pci_core.c\n+++ b/drivers/vfio/pci/vfio_pci_core.c\n@@ -1647,7 +1647,7 @@ static unsigned long vma_to_pfn(struct vm_area_struct *vma)\n \tu64 pgoff;\n \n \tpgoff = vma->vm_pgoff &\n-\t\t((1U << (VFIO_PCI_OFFSET_SHIFT - PAGE_SHIFT)) - 1);\n+\t\t((1UL << (VFIO_PCI_OFFSET_SHIFT - PAGE_SHIFT)) - 1);\n \n \treturn (pci_resource_start(vdev->pdev, index) >> PAGE_SHIFT) + pgoff;\n }\n@@ -1751,7 +1751,7 @@ int vfio_pci_core_mmap(struct vfio_device *core_vdev, struct vm_area_struct *vma\n \tphys_len = PAGE_ALIGN(pci_resource_len(pdev, index));\n \treq_len = vma->vm_end - vma->vm_start;\n \tpgoff = vma->vm_pgoff &\n-\t\t((1U << (VFIO_PCI_OFFSET_SHIFT - PAGE_SHIFT)) - 1);\n+\t\t((1UL << (VFIO_PCI_OFFSET_SHIFT - PAGE_SHIFT)) - 1);\n \treq_start = pgoff << PAGE_SHIFT;\n \n \tif (req_start + req_len > phys_len)\ndiff --git a/include/linux/vfio_pci_core.h b/include/linux/vfio_pci_core.h\nindex 1ac86896875cf5c9b5cc8ef25fae8bbd4394de05..12781707f086a330161990dc3579ec0d75887da8 100644\n--- a/include/linux/vfio_pci_core.h\n+++ b/include/linux/vfio_pci_core.h\n@@ -20,7 +20,7 @@\n #ifndef VFIO_PCI_CORE_H\n #define VFIO_PCI_CORE_H\n \n-#define VFIO_PCI_OFFSET_SHIFT 40\n+#define VFIO_PCI_OFFSET_SHIFT 48\n #define VFIO_PCI_OFFSET_TO_INDEX(off)\t(off >> VFIO_PCI_OFFSET_SHIFT)\n #define VFIO_PCI_INDEX_TO_OFFSET(index)\t((u64)(index) << VFIO_PCI_OFFSET_SHIFT)\n #define VFIO_PCI_OFFSET_MASK\t(((u64)(1) << VFIO_PCI_OFFSET_SHIFT) - 1)\n", "prefixes": [ "1/3" ] }