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bh=pdlFhyLlZNxc7kwZLBiiaeop9Tldvte1oFJ6YyOhVds=; b=Co5Ku1xNMljr5yPOszaOKeo+udhLzyIIr6Hxclma1mqe2H9dNvxnocMaHaOrDDm8AOl6yv CGKZYO2RR7gtaRbW8sQNVk+Sud8vCo7cJbpBrRjQDBxS8Tndjn9s3dBdW/rh6Q10FH3u6h BJPDd/82YwuHVfgFQNLBcTVMQ5J37wY= X-MC-Unique: xskim7HzPhe1Rw35r5eMUg-1 From: Eric Auger To: eric.auger.pro@gmail.com, eric.auger@redhat.com, qemu-devel@nongnu.org, qemu-arm@nongnu.org, alex.williamson@redhat.com Subject: [RFC v9 19/29] vfio/pci: Set up the DMA FAULT region Date: Sun, 11 Apr 2021 14:09:02 +0200 Message-Id: <20210411120912.15770-20-eric.auger@redhat.com> In-Reply-To: <20210411120912.15770-1-eric.auger@redhat.com> References: <20210411120912.15770-1-eric.auger@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.84 on 10.5.11.22 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=eric.auger@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Transfer-Encoding: quoted-printable Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=63.128.21.124; envelope-from=eric.auger@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -27 X-Spam_score: -2.8 X-Spam_bar: -- X-Spam_report: (-2.8 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.001, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_LOW=-0.7, RCVD_IN_MSPIKE_H4=-0.01, RCVD_IN_MSPIKE_WL=-0.01, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: peter.maydell@linaro.org, jacob.jun.pan@linux.intel.com, jean-philippe@linaro.org, tn@semihalf.com, chenxiang66@hisilicon.com, jiangkunkun@huawei.com, shameerali.kolothum.thodi@huawei.com, nicoleotsuka@gmail.com, vivek.gautam@arm.com, vdumpa@nvidia.com, yi.l.liu@intel.com, peterx@redhat.com, zhangfei.gao@gmail.com, yuzenghui@huawei.com, zhukeqian1@huawei.com Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: fail (Header signature does not verify) Content-Type: text/plain; charset="utf-8" Set up the fault region which is composed of the actual fault queue (mmappable) and a header used to handle it. The fault queue is mmapped. Signed-off-by: Eric Auger --- v4 -> v5: - use a single DMA FAULT region. No version selection anymore --- hw/vfio/pci.h | 1 + hw/vfio/pci.c | 64 +++++++++++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 65 insertions(+) diff --git a/hw/vfio/pci.h b/hw/vfio/pci.h index a8b06737fb..eef91065f1 100644 --- a/hw/vfio/pci.h +++ b/hw/vfio/pci.h @@ -145,6 +145,7 @@ struct VFIOPCIDevice { EventNotifier err_notifier; EventNotifier req_notifier; VFIOPCIExtIRQ *ext_irqs; + VFIORegion dma_fault_region; int (*resetfn)(struct VFIOPCIDevice *); uint32_t vendor_id; uint32_t device_id; diff --git a/hw/vfio/pci.c b/hw/vfio/pci.c index 71b411b61c..9d4e020b97 100644 --- a/hw/vfio/pci.c +++ b/hw/vfio/pci.c @@ -2614,11 +2614,67 @@ int vfio_populate_vga(VFIOPCIDevice *vdev, Error **= errp) return 0; } =20 +static void vfio_init_fault_regions(VFIOPCIDevice *vdev, Error **errp) +{ + struct vfio_region_info *fault_region_info =3D NULL; + struct vfio_region_info_cap_fault *cap_fault; + VFIODevice *vbasedev =3D &vdev->vbasedev; + struct vfio_info_cap_header *hdr; + char *fault_region_name; + int ret; + + ret =3D vfio_get_dev_region_info(&vdev->vbasedev, + VFIO_REGION_TYPE_NESTED, + VFIO_REGION_SUBTYPE_NESTED_DMA_FAULT, + &fault_region_info); + if (ret) { + goto out; + } + + hdr =3D vfio_get_region_info_cap(fault_region_info, + VFIO_REGION_INFO_CAP_DMA_FAULT); + if (!hdr) { + error_setg(errp, "failed to retrieve DMA FAULT capability"); + goto out; + } + cap_fault =3D container_of(hdr, struct vfio_region_info_cap_fault, + header); + if (cap_fault->version !=3D 1) { + error_setg(errp, "Unsupported DMA FAULT API version %d", + cap_fault->version); + goto out; + } + + fault_region_name =3D g_strdup_printf("%s DMA FAULT %d", + vbasedev->name, + fault_region_info->index); + + ret =3D vfio_region_setup(OBJECT(vdev), vbasedev, + &vdev->dma_fault_region, + fault_region_info->index, + fault_region_name); + g_free(fault_region_name); + if (ret) { + error_setg_errno(errp, -ret, + "failed to set up the DMA FAULT region %d", + fault_region_info->index); + goto out; + } + + ret =3D vfio_region_mmap(&vdev->dma_fault_region); + if (ret) { + error_setg_errno(errp, -ret, "Failed to mmap the DMA FAULT queue"); + } +out: + g_free(fault_region_info); +} + static void vfio_populate_device(VFIOPCIDevice *vdev, Error **errp) { VFIODevice *vbasedev =3D &vdev->vbasedev; struct vfio_region_info *reg_info; struct vfio_irq_info irq_info =3D { .argsz =3D sizeof(irq_info) }; + Error *err =3D NULL; int i, ret =3D -1; =20 /* Sanity check device */ @@ -2682,6 +2738,12 @@ static void vfio_populate_device(VFIOPCIDevice *vdev= , Error **errp) } } =20 + vfio_init_fault_regions(vdev, &err); + if (err) { + error_propagate(errp, err); + return; + } + irq_info.index =3D VFIO_PCI_ERR_IRQ_INDEX; =20 ret =3D ioctl(vdev->vbasedev.fd, VFIO_DEVICE_GET_IRQ_INFO, &irq_info); @@ -3274,6 +3336,7 @@ static void vfio_instance_finalize(Object *obj) =20 vfio_display_finalize(vdev); vfio_bars_finalize(vdev); + vfio_region_finalize(&vdev->dma_fault_region); g_free(vdev->emulated_config_bits); g_free(vdev->rom); /* @@ -3294,6 +3357,7 @@ static void vfio_exitfn(PCIDevice *pdev) vfio_unregister_req_notifier(vdev); vfio_unregister_err_notifier(vdev); vfio_unregister_ext_irq_notifiers(vdev); + vfio_region_exit(&vdev->dma_fault_region); pci_device_set_intx_routing_notifier(&vdev->pdev, NULL); if (vdev->irqchip_change_notifier.notify) { kvm_irqchip_remove_change_notifier(&vdev->irqchip_change_notifier); --=20 2.26.3