[Qemu-devel] [PATCH 2/2] intel_iommu: allow migration

[Peter Xu <peterx@redhat.com>]

IOMMU needs to be migrated before all the PCI devices (in case there are
devices that will request for address translation). So marking it with
priority 100. Migration framework helped to do all the rest.

Signed-off-by: Peter Xu <peterx@redhat.com>
---
 hw/i386/intel_iommu.c | 21 ++++++++++++++++++++-
 1 file changed, 20 insertions(+), 1 deletion(-)

diff --git a/hw/i386/intel_iommu.c b/hw/i386/intel_iommu.c
index 5f3e351..535ed2c 100644
--- a/hw/i386/intel_iommu.c
+++ b/hw/i386/intel_iommu.c
@@ -1996,7 +1996,26 @@ static void vtd_iommu_notify_flag_changed(MemoryRegion *iommu,
 
 static const VMStateDescription vtd_vmstate = {
     .name = "iommu-intel",
-    .unmigratable = 1,
+    .version_id = 1,
+    .minimum_version_id = 1,
+    .priority = 100,
+    .fields = (VMStateField[]) {
+        VMSTATE_UINT64(root, IntelIOMMUState),
+        VMSTATE_UINT64(intr_root, IntelIOMMUState),
+        VMSTATE_UINT64(iq, IntelIOMMUState),
+        VMSTATE_UINT32(intr_size, IntelIOMMUState),
+        VMSTATE_UINT16(iq_head, IntelIOMMUState),
+        VMSTATE_UINT16(iq_tail, IntelIOMMUState),
+        VMSTATE_UINT16(iq_size, IntelIOMMUState),
+        VMSTATE_UINT16(next_frcd_reg, IntelIOMMUState),
+        VMSTATE_UINT8(iq_last_desc_type, IntelIOMMUState),
+        VMSTATE_BOOL(root_extended, IntelIOMMUState),
+        VMSTATE_BOOL(dmar_enabled, IntelIOMMUState),
+        VMSTATE_BOOL(qi_enabled, IntelIOMMUState),
+        VMSTATE_BOOL(intr_enabled, IntelIOMMUState),
+        VMSTATE_BOOL(intr_eime, IntelIOMMUState),
+        VMSTATE_END_OF_LIST()
+    }
 };
 
 static const MemoryRegionOps vtd_mem_ops = {
-- 
2.7.4