From d355566bd958e24e7e384da6ea89a9fc88d7bfed Mon Sep 17 00:00:00 2001
From: Zhenzhong Duan <zhenzhong.duan@intel.com>
Date: Fri, 24 Jun 2022 17:37:40 +0800
Subject: [PATCH] virtio-iommu: Fix migration regression
We also need to switch to the right address space on dest side
after loading the device status. DMA to wrong address space is
destructive.
Fixes: 3facd774962fd ("virtio-iommu: Add bypass mode support to assigned device")
Suggested-by: Eric Auger <eric.auger@redhat.com>
Signed-off-by: Zhenzhong Duan <zhenzhong.duan@intel.com>
Message-Id: <20220624093740.3525267-1-zhenzhong.duan@intel.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Eric Auger <eric.auger@redhat.com>
---
hw/virtio/virtio-iommu.c | 8 ++++++++
1 file changed, 8 insertions(+)
diff --git a/hw/virtio/virtio-iommu.c b/hw/virtio/virtio-iommu.c
index 08b227e828..281152d338 100644
--- a/hw/virtio/virtio-iommu.c
+++ b/hw/virtio/virtio-iommu.c
@@ -1322,6 +1322,14 @@ static int iommu_post_load(void *opaque, int version_id)
VirtIOIOMMU *s = opaque;
g_tree_foreach(s->domains, reconstruct_endpoints, s);
+
+ /*
+ * Memory regions are dynamically turned on/off depending on
+ * 'config.bypass' and attached domain type if there is. After
+ * migration, we need to make sure the memory regions are
+ * still correct.
+ */
+ virtio_iommu_switch_address_space_all(s);
return 0;
}
--
2.30.2