Patch Detail

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{
    "id": 818960,
    "url": "http://patchwork.ozlabs.org/api/patches/818960/?format=api",
    "web_url": "http://patchwork.ozlabs.org/project/qemu-devel/patch/1506494000-31982-4-git-send-email-Bharat.Bhushan@nxp.com/",
    "project": {
        "id": 14,
        "url": "http://patchwork.ozlabs.org/api/projects/14/?format=api",
        "name": "QEMU Development",
        "link_name": "qemu-devel",
        "list_id": "qemu-devel.nongnu.org",
        "list_email": "qemu-devel@nongnu.org",
        "web_url": "",
        "scm_url": "",
        "webscm_url": "",
        "list_archive_url": "",
        "list_archive_url_format": "",
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    },
    "msgid": "<1506494000-31982-4-git-send-email-Bharat.Bhushan@nxp.com>",
    "list_archive_url": null,
    "date": "2017-09-27T06:33:18",
    "name": "[v4,3/5] virtio-iommu: Call iommu notifier for attach/detach",
    "commit_ref": null,
    "pull_url": null,
    "state": "new",
    "archived": false,
    "hash": "bbe8a7f325c5565530334afc31e521b07e664a98",
    "submitter": {
        "id": 70741,
        "url": "http://patchwork.ozlabs.org/api/people/70741/?format=api",
        "name": "Bharat Bhushan",
        "email": "bharat.bhushan@nxp.com"
    },
    "delegate": null,
    "mbox": "http://patchwork.ozlabs.org/project/qemu-devel/patch/1506494000-31982-4-git-send-email-Bharat.Bhushan@nxp.com/mbox/",
    "series": [
        {
            "id": 5292,
            "url": "http://patchwork.ozlabs.org/api/series/5292/?format=api",
            "web_url": "http://patchwork.ozlabs.org/project/qemu-devel/list/?series=5292",
            "date": "2017-09-27T06:33:15",
            "name": "virtio-iommu: VFIO integration",
            "version": 4,
            "mbox": "http://patchwork.ozlabs.org/series/5292/mbox/"
        }
    ],
    "comments": "http://patchwork.ozlabs.org/api/patches/818960/comments/",
    "check": "pending",
    "checks": "http://patchwork.ozlabs.org/api/patches/818960/checks/",
    "tags": {},
    "related": [],
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        "From": "Bharat Bhushan <Bharat.Bhushan@nxp.com>",
        "To": "<eric.auger@redhat.com>, <eric.auger.pro@gmail.com>,\n\t<peter.maydell@linaro.org>, <alex.williamson@redhat.com>,\n\t<mst@redhat.com>, <qemu-arm@nongnu.org>, <qemu-devel@nongnu.org>",
        "Date": "Wed, 27 Sep 2017 12:03:18 +0530",
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        "X-Received-From": "104.47.40.85",
        "Subject": "[Qemu-devel] [PATCH v4 3/5] virtio-iommu: Call iommu notifier for\n\tattach/detach",
        "X-BeenThere": "qemu-devel@nongnu.org",
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        "Cc": "wei@redhat.com, kevin.tian@intel.com,\n\tBharat Bhushan <Bharat.Bhushan@nxp.com>, marc.zyngier@arm.com,\n\ttn@semihalf.com, will.deacon@arm.com, drjones@redhat.com,\n\trobin.murphy@arm.com, christoffer.dall@linaro.org,\n\tbharatb.yadav@gmail.com",
        "Errors-To": "qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org",
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    },
    "content": "iommu-notifier are called when a device is attached\nor detached to as address-space.\nThis is needed for VFIO.\n\nSigned-off-by: Bharat Bhushan <Bharat.Bhushan@nxp.com>\nSigned-off-by: Eric Auger <eric.auger@redhat.com>\n---\nv3->v4:\n Follwoig fixes by Eric\n - Return \"false\" from virtio_iommu_mapping_unmap/map()\n - Calling virtio_iommu_notify_unmap/map() for all device in as\n\n hw/virtio/virtio-iommu.c | 43 +++++++++++++++++++++++++++++++++++++++++++\n 1 file changed, 43 insertions(+)",
    "diff": "diff --git a/hw/virtio/virtio-iommu.c b/hw/virtio/virtio-iommu.c\nindex 085e972..ff91bce 100644\n--- a/hw/virtio/virtio-iommu.c\n+++ b/hw/virtio/virtio-iommu.c\n@@ -127,8 +127,42 @@ static void virtio_iommu_notify_unmap(IOMMUMemoryRegion *mr, hwaddr iova,\n     memory_region_notify_iommu(mr, entry);\n }\n \n+static gboolean virtio_iommu_mapping_unmap(gpointer key, gpointer value,\n+                                           gpointer data)\n+{\n+    viommu_mapping *mapping = (viommu_mapping *) value;\n+    IOMMUMemoryRegion *mr = (IOMMUMemoryRegion *) data;\n+\n+    virtio_iommu_notify_unmap(mr, mapping->virt_addr, mapping->size);\n+\n+    return false;\n+}\n+\n+static gboolean virtio_iommu_mapping_map(gpointer key, gpointer value,\n+                                         gpointer data)\n+{\n+    viommu_mapping *mapping = (viommu_mapping *) value;\n+    IOMMUMemoryRegion *mr = (IOMMUMemoryRegion *) data;\n+\n+    virtio_iommu_notify_map(mr, mapping->virt_addr, mapping->phys_addr,\n+                            mapping->size);\n+\n+    return false;\n+}\n+\n static void virtio_iommu_detach_dev_from_as(viommu_dev *dev)\n {\n+    VirtioIOMMUNotifierNode *node;\n+    VirtIOIOMMU *s = dev->viommu;\n+    viommu_as *as = dev->as;\n+\n+    QLIST_FOREACH(node, &s->notifiers_list, next) {\n+        if (dev->id == node->iommu_dev->devfn) {\n+            g_tree_foreach(as->mappings, virtio_iommu_mapping_unmap,\n+                           &node->iommu_dev->iommu_mr);\n+        }\n+    }\n+\n     QLIST_REMOVE(dev, next);\n     dev->as = NULL;\n }\n@@ -260,6 +294,7 @@ static int virtio_iommu_attach(VirtIOIOMMU *s,\n     uint32_t asid = le32_to_cpu(req->address_space);\n     uint32_t devid = le32_to_cpu(req->device);\n     uint32_t reserved = le32_to_cpu(req->reserved);\n+    VirtioIOMMUNotifierNode *node;\n     viommu_as *as;\n     viommu_dev *dev;\n \n@@ -284,6 +319,14 @@ static int virtio_iommu_attach(VirtIOIOMMU *s,\n     dev->as = as;\n     g_tree_ref(as->mappings);\n \n+    /* replay existing address space mappings on the associated mr */\n+    QLIST_FOREACH(node, &s->notifiers_list, next) {\n+        if (devid == node->iommu_dev->devfn) {\n+            g_tree_foreach(as->mappings, virtio_iommu_mapping_map,\n+                           &node->iommu_dev->iommu_mr);\n+        }\n+    }\n+\n     return VIRTIO_IOMMU_S_OK;\n }\n \n",
    "prefixes": [
        "v4",
        "3/5"
    ]
}