backends/iommufd: Implement HostIOMMUDeviceClass::get_cap() handler
Suggested-by: Cédric Le Goater <clg@redhat.com>
Signed-off-by: Zhenzhong Duan <zhenzhong.duan@intel.com>
Reviewed-by: Eric Auger <eric.auger@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
diff --git a/backends/iommufd.c b/backends/iommufd.c
index c7e969d..84fefbc 100644
--- a/backends/iommufd.c
+++ b/backends/iommufd.c
@@ -230,6 +230,28 @@
return true;
}
+static int hiod_iommufd_get_cap(HostIOMMUDevice *hiod, int cap, Error **errp)
+{
+ HostIOMMUDeviceCaps *caps = &hiod->caps;
+
+ switch (cap) {
+ case HOST_IOMMU_DEVICE_CAP_IOMMU_TYPE:
+ return caps->type;
+ case HOST_IOMMU_DEVICE_CAP_AW_BITS:
+ return caps->aw_bits;
+ default:
+ error_setg(errp, "%s: unsupported capability %x", hiod->name, cap);
+ return -EINVAL;
+ }
+}
+
+static void hiod_iommufd_class_init(ObjectClass *oc, void *data)
+{
+ HostIOMMUDeviceClass *hioc = HOST_IOMMU_DEVICE_CLASS(oc);
+
+ hioc->get_cap = hiod_iommufd_get_cap;
+};
+
static const TypeInfo types[] = {
{
.name = TYPE_IOMMUFD_BACKEND,
@@ -246,6 +268,7 @@
}, {
.name = TYPE_HOST_IOMMU_DEVICE_IOMMUFD,
.parent = TYPE_HOST_IOMMU_DEVICE,
+ .class_init = hiod_iommufd_class_init,
.abstract = true,
}
};
