commit 3ad35d9158bde0500aeaea4147345d39ad0ae1c0
author Eric Auger <eric.auger@redhat.com> Fri Jun 14 11:52:53 2024 +0200
committer Cédric Le Goater <clg@redhat.com> Mon Jun 24 23:15:30 2024 +0200
tree 1257f28689104132debe7f8ffa26adb121131cbd
parent 817ef10da23cd9a6ee61c8f31f55b845c7a74760

HostIOMMUDevice: Introduce get_iova_ranges callback

Introduce a new HostIOMMUDevice callback that allows to
retrieve the usable IOVA ranges.

Implement this callback in the legacy VFIO and IOMMUFD VFIO
host iommu devices. This relies on the VFIODevice agent's
base container iova_ranges resource.

Signed-off-by: Eric Auger <eric.auger@redhat.com>
Reviewed-by: Zhenzhong Duan <zhenzhong.duan@intel.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>

hw/vfio/container.c

diff --git a/hw/vfio/container.c b/hw/vfio/container.c
index b728b97..c48749c 100644
--- a/hw/vfio/container.c
+++ b/hw/vfio/container.c
@@ -1164,12 +1164,28 @@
     }
 }
 
+static GList *
+hiod_legacy_vfio_get_iova_ranges(HostIOMMUDevice *hiod, Error **errp)
+{
+    VFIODevice *vdev = hiod->agent;
+    GList *l = NULL;
+
+    g_assert(vdev);
+
+    if (vdev->bcontainer) {
+        l = g_list_copy(vdev->bcontainer->iova_ranges);
+    }
+
+    return l;
+}
+
 static void hiod_legacy_vfio_class_init(ObjectClass *oc, void *data)
 {
     HostIOMMUDeviceClass *hioc = HOST_IOMMU_DEVICE_CLASS(oc);
 
     hioc->realize = hiod_legacy_vfio_realize;
     hioc->get_cap = hiod_legacy_vfio_get_cap;
+    hioc->get_iova_ranges = hiod_legacy_vfio_get_iova_ranges;
 };
 
 static const TypeInfo types[] = {

hw/vfio/iommufd.c

diff --git a/hw/vfio/iommufd.c b/hw/vfio/iommufd.c
index dbdae1a..e502081 100644
--- a/hw/vfio/iommufd.c
+++ b/hw/vfio/iommufd.c
@@ -645,11 +645,27 @@
     return true;
 }
 
+static GList *
+hiod_iommufd_vfio_get_iova_ranges(HostIOMMUDevice *hiod, Error **errp)
+{
+    VFIODevice *vdev = hiod->agent;
+    GList *l = NULL;
+
+    g_assert(vdev);
+
+    if (vdev->bcontainer) {
+        l = g_list_copy(vdev->bcontainer->iova_ranges);
+    }
+
+    return l;
+}
+
 static void hiod_iommufd_vfio_class_init(ObjectClass *oc, void *data)
 {
     HostIOMMUDeviceClass *hiodc = HOST_IOMMU_DEVICE_CLASS(oc);
 
     hiodc->realize = hiod_iommufd_vfio_realize;
+    hiodc->get_iova_ranges = hiod_iommufd_vfio_get_iova_ranges;
 };
 
 static const TypeInfo types[] = {

include/sysemu/host_iommu_device.h

diff --git a/include/sysemu/host_iommu_device.h b/include/sysemu/host_iommu_device.h
index 3e5f058..40e0fa1 100644
--- a/include/sysemu/host_iommu_device.h
+++ b/include/sysemu/host_iommu_device.h
@@ -80,6 +80,14 @@
      * i.e., HOST_IOMMU_DEVICE_CAP_AW_BITS.
      */
     int (*get_cap)(HostIOMMUDevice *hiod, int cap, Error **errp);
+    /**
+     * @get_iova_ranges: Return the list of usable iova_ranges along with
+     * @hiod Host IOMMU device
+     *
+     * @hiod: handle to the host IOMMU device
+     * @errp: error handle
+     */
+    GList* (*get_iova_ranges)(HostIOMMUDevice *hiod, Error **errp);
 };
 
 /*