Finish CPR by change the owning process of the iommufd device in
post load.
Signed-off-by: Steve Sistare <steven.sist...@oracle.com>
Reviewed-by: Zhenzhong Duan <zhenzhong.d...@intel.com>
---
hw/vfio/cpr-iommufd.c | 30 ++++++++++++++++++++++++++++++
1 file changed, 30 insertions(+)
diff --git a/hw/vfio/cpr-iommufd.c b/hw/vfio/cpr-iommufd.c
index a72b68d..cbeab57 100644
--- a/hw/vfio/cpr-iommufd.c
+++ b/hw/vfio/cpr-iommufd.c
@@ -112,10 +112,40 @@ static bool vfio_cpr_supported(IOMMUFDBackend *be, Error
**errp)
return true;
}
+static int iommufd_cpr_pre_save(void *opaque)
+{
+ IOMMUFDBackend *be = opaque;
+
+ /*
+ * The process has not changed yet, but proactively try the ioctl,
+ * and it will fail if any DMA mappings are not supported.
+ */
+ if (!iommufd_change_process_capable(be)) {
+ error_report("some memory regions do not support "
+ "IOMMU_IOAS_CHANGE_PROCESS");
+ return -1;
+ }
+ return 0;
+}
+
+static int iommufd_cpr_post_load(void *opaque, int version_id)
+{
+ IOMMUFDBackend *be = opaque;
+ Error *local_err = NULL;
+
+ if (!iommufd_change_process(be, &local_err)) {
+ error_report_err(local_err);
+ return -1;
+ }
+ return 0;
+}
+
static const VMStateDescription iommufd_cpr_vmstate = {
.name = "iommufd",
.version_id = 0,
.minimum_version_id = 0,
+ .pre_save = iommufd_cpr_pre_save,
+ .post_load = iommufd_cpr_post_load,
.needed = cpr_incoming_needed,
.fields = (VMStateField[]) {
VMSTATE_END_OF_LIST()
--
1.8.3.1
