[Qemu-devel] [PATCH 13/15] pseries: savevm support for PAPR TCE tables

[David Gibson <david@gibson.dropbear.id.au>]

This patch adds the necessary VMStateDescription information to save the
state of PAPR TCE tables (that is, the PAPR specified IOMMU).

Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
---
 hw/spapr_iommu.c |   24 ++++++++++++++++++++++++
 1 file changed, 24 insertions(+)

diff --git a/hw/spapr_iommu.c b/hw/spapr_iommu.c
index 38034c0..29e76eb 100644
--- a/hw/spapr_iommu.c
+++ b/hw/spapr_iommu.c
@@ -115,6 +115,26 @@ static int spapr_tce_translate(DMAContext *dma,
     return 0;
 }
 
+static const VMStateDescription vmstate_spapr_tce_table = {
+    .name = "spapr_iommu",
+    .version_id = 1,
+    .minimum_version_id = 1,
+    .minimum_version_id_old = 1,
+    .fields      = (VMStateField []) {
+        /* Sanity check */
+        VMSTATE_UINT32_EQUAL(liobn, sPAPRTCETable),
+        VMSTATE_UINT32_EQUAL(window_size, sPAPRTCETable),
+
+        /* IOMMU state */
+        VMSTATE_BOOL(bypass, sPAPRTCETable),
+        VMSTATE_VBUFFER_DIVIDE(table, sPAPRTCETable, 0, NULL, 0, window_size,
+                               SPAPR_TCE_PAGE_SIZE / sizeof(sPAPRTCE)),
+
+        VMSTATE_END_OF_LIST()
+    },
+};
+
+
 DMAContext *spapr_tce_new_dma_context(uint32_t liobn, size_t window_size)
 {
     sPAPRTCETable *tcet;
@@ -148,6 +168,8 @@ DMAContext *spapr_tce_new_dma_context(uint32_t liobn, size_t window_size)
 
     QLIST_INSERT_HEAD(&spapr_tce_tables, tcet, list);
 
+    vmstate_register(NULL, tcet->liobn, &vmstate_spapr_tce_table, tcet);
+
     return &tcet->dma;
 }
 
@@ -157,6 +179,8 @@ void spapr_tce_free(DMAContext *dma)
     if (dma) {
         sPAPRTCETable *tcet = DO_UPCAST(sPAPRTCETable, dma, dma);
 
+        vmstate_unregister(NULL, &vmstate_spapr_tce_table, tcet);
+
         QLIST_REMOVE(tcet, list);
 
         if (!kvm_enabled() ||
-- 
1.7.10.4