During CPR, after VFIO_DMA_UNMAP_FLAG_VADDR, the vaddr is temporarily
invalid, so mediated devices cannot be supported. Add a blocker for them.
This restriction will not apply to iommufd containers when CPR is added
for them in a future patch.
Signed-off-by: Steve Sistare <steven.sist...@oracle.com>
---
hw/vfio/container.c | 8 ++++++++
include/hw/vfio/vfio-cpr.h | 1 +
2 files changed, 9 insertions(+)
diff --git a/hw/vfio/container.c b/hw/vfio/container.c
index d26f78e..8130d1f 100644
--- a/hw/vfio/container.c
+++ b/hw/vfio/container.c
@@ -999,6 +999,13 @@ static bool vfio_legacy_attach_device(const char *name,
VFIODevice *vbasedev,
return false;
}
+ if (vbasedev->mdev) {
+ error_setg(&vbasedev->cpr.mdev_blocker,
+ "CPR does not support vfio mdev %s", vbasedev->name);
+ migrate_add_blocker_modes(&vbasedev->cpr.mdev_blocker, &error_fatal,
+ MIG_MODE_CPR_TRANSFER, -1);
+ }
+
bcontainer = &group->container->bcontainer;
vbasedev->bcontainer = bcontainer;
QLIST_INSERT_HEAD(&bcontainer->device_list, vbasedev, container_next);
@@ -1015,6 +1022,7 @@ static void vfio_legacy_detach_device(VFIODevice
*vbasedev)
QLIST_REMOVE(vbasedev, container_next);
vbasedev->bcontainer = NULL;
trace_vfio_detach_device(vbasedev->name, group->groupid);
+ migrate_del_blocker(&vbasedev->cpr.mdev_blocker);
vfio_put_base_device(vbasedev);
vfio_put_group(group);
}
diff --git a/include/hw/vfio/vfio-cpr.h b/include/hw/vfio/vfio-cpr.h
index 1a3eee9..25ac944 100644
--- a/include/hw/vfio/vfio-cpr.h
+++ b/include/hw/vfio/vfio-cpr.h
@@ -17,6 +17,7 @@ typedef struct VFIOContainerCPR {
typedef struct VFIODeviceCPR {
bool reused;
+ Error *mdev_blocker;
} VFIODeviceCPR;
struct VFIOContainer;
--
1.8.3.1
