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>
Reviewed-by: Cédric Le Goater <c...@redhat.com>
---
include/hw/vfio/vfio-cpr.h | 3 +++
include/hw/vfio/vfio-device.h | 2 ++
hw/vfio/container.c | 8 ++++++++
3 files changed, 13 insertions(+)
diff --git a/include/hw/vfio/vfio-cpr.h b/include/hw/vfio/vfio-cpr.h
index 0462447..b83dd42 100644
--- a/include/hw/vfio/vfio-cpr.h
+++ b/include/hw/vfio/vfio-cpr.h
@@ -22,6 +22,9 @@ typedef struct VFIOContainerCPR {
void *vaddr, bool readonly, MemoryRegion *mr);
} VFIOContainerCPR;
+typedef struct VFIODeviceCPR {
+ Error *mdev_blocker;
+} VFIODeviceCPR;
bool vfio_legacy_cpr_register_container(struct VFIOContainer *container,
Error **errp);
diff --git a/include/hw/vfio/vfio-device.h b/include/hw/vfio/vfio-device.h
index 8bcb3c1..4e4d0b6 100644
--- a/include/hw/vfio/vfio-device.h
+++ b/include/hw/vfio/vfio-device.h
@@ -28,6 +28,7 @@
#endif
#include "system/system.h"
#include "hw/vfio/vfio-container-base.h"
+#include "hw/vfio/vfio-cpr.h"
#include "system/host_iommu_device.h"
#include "system/iommufd.h"
@@ -84,6 +85,7 @@ typedef struct VFIODevice {
VFIOIOASHwpt *hwpt;
QLIST_ENTRY(VFIODevice) hwpt_next;
struct vfio_region_info **reginfo;
+ VFIODeviceCPR cpr;
} VFIODevice;
struct VFIODeviceOps {
diff --git a/hw/vfio/container.c b/hw/vfio/container.c
index 936ce37..3e8d645 100644
--- a/hw/vfio/container.c
+++ b/hw/vfio/container.c
@@ -987,6 +987,13 @@ 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:
@@ -1004,6 +1011,7 @@ 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);
--
1.8.3.1
