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 0e02726..562e3bd 100644
--- a/hw/vfio/container.c
+++ b/hw/vfio/container.c
@@ -995,6 +995,13 @@ static bool vfio_legacy_attach_device(const char *name,
VFIODevice *vbasedev,
goto device_put_exit;
}
+ 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);
+ }
+
return true;
device_put_exit:
@@ -1012,6 +1019,7 @@ static void vfio_legacy_detach_device(VFIODevice
*vbasedev)
vfio_device_unprepare(vbasedev);
+ migrate_del_blocker(&vbasedev->cpr.mdev_blocker);
object_unref(vbasedev->hiod);
vfio_device_put(vbasedev);
vfio_group_put(group);
diff --git a/include/hw/vfio/vfio-cpr.h b/include/hw/vfio/vfio-cpr.h
index 1c4f070..0fc7ab2 100644
--- a/include/hw/vfio/vfio-cpr.h
+++ b/include/hw/vfio/vfio-cpr.h
@@ -18,6 +18,7 @@ typedef struct VFIOContainerCPR {
typedef struct VFIODeviceCPR {
bool reused;
+ Error *mdev_blocker;
} VFIODeviceCPR;
struct VFIOContainer;
--
1.8.3.1
