{"id":2234850,"url":"http://patchwork.ozlabs.org/api/1.2/patches/2234850/?format=json","web_url":"http://patchwork.ozlabs.org/project/linux-pci/patch/20260508064053.37529-8-fengchengwen@huawei.com/","project":{"id":28,"url":"http://patchwork.ozlabs.org/api/1.2/projects/28/?format=json","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":"<20260508064053.37529-8-fengchengwen@huawei.com>","list_archive_url":null,"date":"2026-05-08T06:40:53","name":"[v8,7/7] vfio/pci: Add PCIe TPH SET_ST interface","commit_ref":null,"pull_url":null,"state":"new","archived":false,"hash":"c5332125d69d44eecb2835c6118516ce34caedf5","submitter":{"id":92756,"url":"http://patchwork.ozlabs.org/api/1.2/people/92756/?format=json","name":"fengchengwen","email":"fengchengwen@huawei.com"},"delegate":null,"mbox":"http://patchwork.ozlabs.org/project/linux-pci/patch/20260508064053.37529-8-fengchengwen@huawei.com/mbox/","series":[{"id":503332,"url":"http://patchwork.ozlabs.org/api/1.2/series/503332/?format=json","web_url":"http://patchwork.ozlabs.org/project/linux-pci/list/?series=503332","date":"2026-05-08T06:40:48","name":"vfio/pci: Add PCIe TPH support","version":8,"mbox":"http://patchwork.ozlabs.org/series/503332/mbox/"}],"comments":"http://patchwork.ozlabs.org/api/patches/2234850/comments/","check":"pending","checks":"http://patchwork.ozlabs.org/api/patches/2234850/checks/","tags":{},"related":[],"headers":{"Return-Path":"\n ","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 (1024-bit key;\n unprotected) header.d=huawei.com header.i=@huawei.com header.a=rsa-sha256\n header.s=dkim header.b=TRrGX/GE;\n\tdkim-atps=neutral","legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=vger.kernel.org\n (client-ip=2600:3c04:e001:36c::12fc:5321; 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a=rsa-sha256; d=huawei.com; s=dkim;\n\tc=relaxed/relaxed; q=dns/txt;\n\th=From;\n\tbh=fd2VDTjAdMqXsNa5cZTMm3EpBDW41poENzxMNDtCrgQ=;\n\tb=TRrGX/GE+CsDsW4tZKC1DrB2+RkHLxowLixpUOYPilkwQtsvKS2J1ZkKsyqdh44dkMBFYX7n3\n\t9684qmag0vOtlT9vSk6Jc73q1OsVEEr1QAtLFSVdITiP1EqdzP1vHHy8UySrPFcCKCIxsB0TGSQ\n\tMYwunOyy0IWtBQuwaVaUzDo=","From":"Chengwen Feng ","To":", ","CC":", , ,\n\t, ,\n\t, , ","Subject":"[PATCH v8 7/7] vfio/pci: Add PCIe TPH SET_ST interface","Date":"Fri, 8 May 2026 14:40:53 +0800","Message-ID":"<20260508064053.37529-8-fengchengwen@huawei.com>","X-Mailer":"git-send-email 2.17.1","In-Reply-To":"<20260508064053.37529-1-fengchengwen@huawei.com>","References":"<20260508064053.37529-1-fengchengwen@huawei.com>","Precedence":"bulk","X-Mailing-List":"linux-pci@vger.kernel.org","List-Id":"","List-Subscribe":"","List-Unsubscribe":"","MIME-Version":"1.0","Content-Type":"text/plain","X-ClientProxiedBy":"kwepems100002.china.huawei.com (7.221.188.206) To\n kwepemk500009.china.huawei.com (7.202.194.94)"},"content":"Add VFIO_PCI_TPH_SET_ST operation to support batch programming of steering\ntag entries. If any entry fails, roll back successfully programmed entries\nto 0 to prevent inconsistent device state.\n\nSigned-off-by: Chengwen Feng \n---\n drivers/vfio/pci/vfio_pci_core.c | 90 ++++++++++++++++++++++++++++++++\n 1 file changed, 90 insertions(+)","diff":"diff --git a/drivers/vfio/pci/vfio_pci_core.c b/drivers/vfio/pci/vfio_pci_core.c\nindex 7ec2dd32f106..9e399696ce6e 100644\n--- a/drivers/vfio/pci/vfio_pci_core.c\n+++ b/drivers/vfio/pci/vfio_pci_core.c\n@@ -1606,6 +1606,94 @@ static int vfio_pci_tph_get_st(struct vfio_pci_core_device *vdev,\n \treturn err;\n }\n \n+static int vfio_pci_tph_set_st(struct vfio_pci_core_device *vdev,\n+\t\t\t struct vfio_device_pci_tph_op *op,\n+\t\t\t void __user *uarg)\n+{\n+\tstruct pci_dev *pdev = vdev->pdev;\n+\tstruct vfio_pci_tph_entry *ents;\n+\tstruct vfio_pci_tph_st st;\n+\tenum tph_mem_type mtype;\n+\tsize_t size, ents_off;\n+\tint i = 0, j, err;\n+\tu32 tab_sz;\n+\tu16 st_val;\n+\n+\ttab_sz = pcie_tph_get_st_table_size(pdev);\n+\tif (tab_sz == 0)\n+\t\treturn -EOPNOTSUPP;\n+\n+\tif (op->argsz < offsetofend(struct vfio_device_pci_tph_op, st))\n+\t\treturn -EINVAL;\n+\n+\tif (copy_from_user(&st, uarg, sizeof(st)))\n+\t\treturn -EFAULT;\n+\n+\tif (!st.count || st.count > VFIO_PCI_TPH_MAX_ENTRIES)\n+\t\treturn -EINVAL;\n+\n+\t/* Check reserved fields are zero */\n+\tif (memchr_inv(&st.reserved, 0, sizeof(st.reserved)))\n+\t\treturn -EINVAL;\n+\n+\tsize = st.count * sizeof(*ents);\n+\tif (op->argsz < offsetofend(struct vfio_device_pci_tph_op, st) + size)\n+\t\treturn -EINVAL;\n+\n+\tents = kvmalloc(size, GFP_KERNEL);\n+\tif (!ents)\n+\t\treturn -ENOMEM;\n+\n+\tents_off = offsetof(struct vfio_pci_tph_st, ents);\n+\tif (copy_from_user(ents, uarg + ents_off, size)) {\n+\t\terr = -EFAULT;\n+\t\tgoto out;\n+\t}\n+\n+\tfor (; i < st.count; i++) {\n+\t\terr = -EINVAL;\n+\n+\t\t/* Check reserved fields and st are zero */\n+\t\tif (memchr_inv(&ents[i].reserved0, 0, sizeof(ents[i].reserved0)) ||\n+\t\t memchr_inv(&ents[i].reserved1, 0, sizeof(ents[i].reserved1)) ||\n+\t\t ents[i].st != 0)\n+\t\t\tgoto out;\n+\n+\t\tif (ents[i].mem_type == VFIO_PCI_TPH_MEM_TYPE_VM)\n+\t\t\tmtype = TPH_MEM_TYPE_VM;\n+\t\telse if (ents[i].mem_type == VFIO_PCI_TPH_MEM_TYPE_PM)\n+\t\t\tmtype = TPH_MEM_TYPE_PM;\n+\t\telse\n+\t\t\tgoto out;\n+\n+\t\tif (ents[i].index >= tab_sz)\n+\t\t\tgoto out;\n+\n+\t\tif (ents[i].cpu == U32_MAX) {\n+\t\t\terr = pcie_tph_set_st_entry(pdev, ents[i].index, 0);\n+\t\t\tif (err)\n+\t\t\t\tgoto out;\n+\t\t\tcontinue;\n+\t\t}\n+\n+\t\terr = pcie_tph_get_cpu_st(pdev, mtype, ents[i].cpu, &st_val);\n+\t\tif (err)\n+\t\t\tgoto out;\n+\t\terr = pcie_tph_set_st_entry(pdev, ents[i].index, st_val);\n+\t\tif (err)\n+\t\t\tgoto out;\n+\t}\n+\n+out:\n+\tif (err) {\n+\t\t/* Roll back previously programmed entries to 0 */\n+\t\tfor (j = 0; j < i; j++)\n+\t\t\tpcie_tph_set_st_entry(pdev, ents[j].index, 0);\n+\t}\n+\tkvfree(ents);\n+\treturn err;\n+}\n+\n static int vfio_pci_ioctl_tph(struct vfio_pci_core_device *vdev,\n \t\t\t void __user *uarg)\n {\n@@ -1626,6 +1714,8 @@ static int vfio_pci_ioctl_tph(struct vfio_pci_core_device *vdev,\n \t\treturn vfio_pci_tph_disable(vdev);\n \tcase VFIO_PCI_TPH_GET_ST:\n \t\treturn vfio_pci_tph_get_st(vdev, &op, uarg + minsz);\n+\tcase VFIO_PCI_TPH_SET_ST:\n+\t\treturn vfio_pci_tph_set_st(vdev, &op, uarg + minsz);\n \tdefault:\n \t\t/* Other ops are not implemented yet */\n \t\treturn -EINVAL;\n","prefixes":["v8","7/7"]}