From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 2A0F7C433E6 for ; Fri, 15 Jan 2021 12:16:23 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id EF389205F4 for ; Fri, 15 Jan 2021 12:16:22 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1731530AbhAOMPy (ORCPT ); Fri, 15 Jan 2021 07:15:54 -0500 Received: from foss.arm.com ([217.140.110.172]:37840 "EHLO foss.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1731508AbhAOMPx (ORCPT ); Fri, 15 Jan 2021 07:15:53 -0500 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 34C4D1529; Fri, 15 Jan 2021 04:15:07 -0800 (PST) Received: from usa.arm.com (a074945.blr.arm.com [10.162.16.71]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id B21A83F70D; Fri, 15 Jan 2021 04:15:02 -0800 (PST) From: Vivek Gautam To: linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, iommu@lists.linux-foundation.org, virtualization@lists.linux-foundation.org Cc: joro@8bytes.org, will.deacon@arm.com, mst@redhat.com, robin.murphy@arm.com, jean-philippe@linaro.org, eric.auger@redhat.com, alex.williamson@redhat.com, kevin.tian@intel.com, jacob.jun.pan@linux.intel.com, yi.l.liu@intel.com, lorenzo.pieralisi@arm.com, shameerali.kolothum.thodi@huawei.com, vivek.gautam@arm.com Subject: [PATCH RFC v1 15/15] iommu/virtio: Update fault type and reason info for viommu fault Date: Fri, 15 Jan 2021 17:43:42 +0530 Message-Id: <20210115121342.15093-16-vivek.gautam@arm.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20210115121342.15093-1-vivek.gautam@arm.com> References: <20210115121342.15093-1-vivek.gautam@arm.com> Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Fault type information can tell about a page request fault or an unreceoverable fault, and further additions to fault reasons and the related PASID information can help in handling faults efficiently. Signed-off-by: Vivek Gautam Cc: Joerg Roedel Cc: Will Deacon Cc: Michael S. Tsirkin Cc: Robin Murphy Cc: Jean-Philippe Brucker Cc: Eric Auger Cc: Alex Williamson Cc: Kevin Tian Cc: Jacob Pan Cc: Liu Yi L Cc: Lorenzo Pieralisi Cc: Shameerali Kolothum Thodi --- drivers/iommu/virtio-iommu.c | 27 +++++++++++++++++++++++++-- include/uapi/linux/virtio_iommu.h | 13 ++++++++++++- 2 files changed, 37 insertions(+), 3 deletions(-) diff --git a/drivers/iommu/virtio-iommu.c b/drivers/iommu/virtio-iommu.c index 9cc3d35125e9..10ef9e98214a 100644 --- a/drivers/iommu/virtio-iommu.c +++ b/drivers/iommu/virtio-iommu.c @@ -652,9 +652,16 @@ static int viommu_fault_handler(struct viommu_dev *viommu, char *reason_str; u8 reason = fault->reason; + u16 type = fault->flt_type; u32 flags = le32_to_cpu(fault->flags); u32 endpoint = le32_to_cpu(fault->endpoint); u64 address = le64_to_cpu(fault->address); + u32 pasid = le32_to_cpu(fault->pasid); + + if (type == VIRTIO_IOMMU_FAULT_F_PAGE_REQ) { + dev_info(viommu->dev, "Page request fault - unhandled\n"); + return 0; + } switch (reason) { case VIRTIO_IOMMU_FAULT_R_DOMAIN: @@ -663,6 +670,21 @@ static int viommu_fault_handler(struct viommu_dev *viommu, case VIRTIO_IOMMU_FAULT_R_MAPPING: reason_str = "page"; break; + case VIRTIO_IOMMU_FAULT_R_WALK_EABT: + reason_str = "page walk external abort"; + break; + case VIRTIO_IOMMU_FAULT_R_PTE_FETCH: + reason_str = "pte fetch"; + break; + case VIRTIO_IOMMU_FAULT_R_PERMISSION: + reason_str = "permission"; + break; + case VIRTIO_IOMMU_FAULT_R_ACCESS: + reason_str = "access"; + break; + case VIRTIO_IOMMU_FAULT_R_OOR_ADDRESS: + reason_str = "output address"; + break; case VIRTIO_IOMMU_FAULT_R_UNKNOWN: default: reason_str = "unknown"; @@ -671,8 +693,9 @@ static int viommu_fault_handler(struct viommu_dev *viommu, /* TODO: find EP by ID and report_iommu_fault */ if (flags & VIRTIO_IOMMU_FAULT_F_ADDRESS) - dev_err_ratelimited(viommu->dev, "%s fault from EP %u at %#llx [%s%s%s]\n", - reason_str, endpoint, address, + dev_err_ratelimited(viommu->dev, + "%s fault from EP %u PASID %u at %#llx [%s%s%s]\n", + reason_str, endpoint, pasid, address, flags & VIRTIO_IOMMU_FAULT_F_READ ? "R" : "", flags & VIRTIO_IOMMU_FAULT_F_WRITE ? "W" : "", flags & VIRTIO_IOMMU_FAULT_F_EXEC ? "X" : ""); diff --git a/include/uapi/linux/virtio_iommu.h b/include/uapi/linux/virtio_iommu.h index 608c8d642e1f..a537d82777f7 100644 --- a/include/uapi/linux/virtio_iommu.h +++ b/include/uapi/linux/virtio_iommu.h @@ -290,19 +290,30 @@ struct virtio_iommu_req_invalidate { #define VIRTIO_IOMMU_FAULT_R_UNKNOWN 0 #define VIRTIO_IOMMU_FAULT_R_DOMAIN 1 #define VIRTIO_IOMMU_FAULT_R_MAPPING 2 +#define VIRTIO_IOMMU_FAULT_R_WALK_EABT 3 +#define VIRTIO_IOMMU_FAULT_R_PTE_FETCH 4 +#define VIRTIO_IOMMU_FAULT_R_PERMISSION 5 +#define VIRTIO_IOMMU_FAULT_R_ACCESS 6 +#define VIRTIO_IOMMU_FAULT_R_OOR_ADDRESS 7 #define VIRTIO_IOMMU_FAULT_F_READ (1 << 0) #define VIRTIO_IOMMU_FAULT_F_WRITE (1 << 1) #define VIRTIO_IOMMU_FAULT_F_EXEC (1 << 2) #define VIRTIO_IOMMU_FAULT_F_ADDRESS (1 << 8) +#define VIRTIO_IOMMU_FAULT_F_DMA_UNRECOV 1 +#define VIRTIO_IOMMU_FAULT_F_PAGE_REQ 2 + struct virtio_iommu_fault { __u8 reason; - __u8 reserved[3]; + __le16 flt_type; + __u8 reserved; __le32 flags; __le32 endpoint; __u8 reserved2[4]; __le64 address; + __le32 pasid; + __u8 reserved3[4]; }; #endif -- 2.17.1