[PATCH 4/7] HostIOMMUDevice: Introduce get_page_size_mask() callback

[Eric Auger <eric.auger@redhat.com>]

This callback will be used to retrieve the page size mask supported
along a given Host IOMMU device.

Signed-off-by: Eric Auger <eric.auger@redhat.com>
---
 include/hw/vfio/vfio-container-base.h |  7 +++++++
 include/sysemu/host_iommu_device.h    |  8 ++++++++
 hw/vfio/container.c                   | 10 ++++++++++
 hw/vfio/iommufd.c                     | 11 +++++++++++
 4 files changed, 36 insertions(+)

diff --git a/include/hw/vfio/vfio-container-base.h b/include/hw/vfio/vfio-container-base.h
index 45d7c40fce..62a8b60d87 100644
--- a/include/hw/vfio/vfio-container-base.h
+++ b/include/hw/vfio/vfio-container-base.h
@@ -88,6 +88,13 @@ int vfio_container_query_dirty_bitmap(const VFIOContainerBase *bcontainer,
 
 GList *vfio_container_get_iova_ranges(const VFIOContainerBase *bcontainer);
 
+static inline uint64_t
+vfio_container_get_page_size_mask(const VFIOContainerBase *bcontainer)
+{
+    assert(bcontainer);
+    return bcontainer->pgsizes;
+}
+
 #define TYPE_VFIO_IOMMU "vfio-iommu"
 #define TYPE_VFIO_IOMMU_LEGACY TYPE_VFIO_IOMMU "-legacy"
 #define TYPE_VFIO_IOMMU_SPAPR TYPE_VFIO_IOMMU "-spapr"
diff --git a/include/sysemu/host_iommu_device.h b/include/sysemu/host_iommu_device.h
index 05c7324a0d..c1bf74ae2c 100644
--- a/include/sysemu/host_iommu_device.h
+++ b/include/sysemu/host_iommu_device.h
@@ -89,6 +89,14 @@ struct HostIOMMUDeviceClass {
      * @hiod: handle to the host IOMMU device
      */
     GList* (*get_iova_ranges)(HostIOMMUDevice *hiod);
+    /**
+     *
+     * @get_page_size_mask: Return the page size mask supported along this
+     * @hiod Host IOMMU device
+     *
+     * @hiod: handle to the host IOMMU device
+     */
+    uint64_t (*get_page_size_mask)(HostIOMMUDevice *hiod);
 };
 
 /*
diff --git a/hw/vfio/container.c b/hw/vfio/container.c
index adeab1ac89..b5ce559a0d 100644
--- a/hw/vfio/container.c
+++ b/hw/vfio/container.c
@@ -1174,6 +1174,15 @@ hiod_legacy_vfio_get_iova_ranges(HostIOMMUDevice *hiod)
     return vfio_container_get_iova_ranges(vdev->bcontainer);
 }
 
+static uint64_t
+hiod_legacy_vfio_get_page_size_mask(HostIOMMUDevice *hiod)
+{
+    VFIODevice *vdev = hiod->agent;
+
+    g_assert(vdev);
+    return vfio_container_get_page_size_mask(vdev->bcontainer);
+}
+
 static void vfio_iommu_legacy_instance_init(Object *obj)
 {
     VFIOContainer *container = VFIO_IOMMU_LEGACY(obj);
@@ -1188,6 +1197,7 @@ static void hiod_legacy_vfio_class_init(ObjectClass *oc, void *data)
     hioc->realize = hiod_legacy_vfio_realize;
     hioc->get_cap = hiod_legacy_vfio_get_cap;
     hioc->get_iova_ranges = hiod_legacy_vfio_get_iova_ranges;
+    hioc->get_page_size_mask = hiod_legacy_vfio_get_page_size_mask;
 };
 
 static const TypeInfo types[] = {
diff --git a/hw/vfio/iommufd.c b/hw/vfio/iommufd.c
index 211e7223f1..7b5f87a148 100644
--- a/hw/vfio/iommufd.c
+++ b/hw/vfio/iommufd.c
@@ -652,12 +652,23 @@ hiod_iommufd_vfio_get_iova_ranges(HostIOMMUDevice *hiod)
     return vfio_container_get_iova_ranges(vdev->bcontainer);
 }
 
+static uint64_t
+hiod_iommufd_vfio_get_page_size_mask(HostIOMMUDevice *hiod)
+{
+    VFIODevice *vdev = hiod->agent;
+
+    g_assert(vdev);
+    return vfio_container_get_page_size_mask(vdev->bcontainer);
+}
+
+
 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;
+    hiodc->get_page_size_mask = hiod_iommufd_vfio_get_page_size_mask;
 };
 
 static const TypeInfo types[] = {
-- 
2.41.0