[PATCH v7 4/5] virtio-iommu: add iommu replay

[Bharat Bhushan]

Default replay does not work with virtio-iommu,
so this patch provide virtio-iommu replay functionality.

Signed-off-by: Bharat Bhushan <bbhush...@marvell.com>
---
 hw/virtio/trace-events   |  1 +
 hw/virtio/virtio-iommu.c | 44 ++++++++++++++++++++++++++++++++++++++++
 2 files changed, 45 insertions(+)

diff --git a/hw/virtio/trace-events b/hw/virtio/trace-events
index d94a1cd8a3..8bae651191 100644
--- a/hw/virtio/trace-events
+++ b/hw/virtio/trace-events
@@ -75,3 +75,4 @@ virtio_iommu_translate_out(uint64_t virt_addr, uint64_t 
phys_addr, uint32_t sid)
 virtio_iommu_report_fault(uint8_t reason, uint32_t flags, uint32_t endpoint, 
uint64_t addr) "FAULT reason=%d flags=%d endpoint=%d address =0x%"PRIx64
 virtio_iommu_notify_map(const char *name, uint64_t iova, uint64_t paddr, 
uint64_t map_size) "mr=%s iova=0x%"PRIx64" pa=0x%" PRIx64" size=0x%"PRIx64
 virtio_iommu_notify_unmap(const char *name, uint64_t iova, uint64_t map_size) 
"mr=%s iova=0x%"PRIx64" size=0x%"PRIx64
+virtio_iommu_remap(uint64_t iova, uint64_t pa, uint64_t size) 
"iova=0x%"PRIx64" pa=0x%" PRIx64" size=0x%"PRIx64""
diff --git a/hw/virtio/virtio-iommu.c b/hw/virtio/virtio-iommu.c
index 2006f72901..bcc9895b76 100644
--- a/hw/virtio/virtio-iommu.c
+++ b/hw/virtio/virtio-iommu.c
@@ -760,6 +760,49 @@ static gint int_cmp(gconstpointer a, gconstpointer b, 
gpointer user_data)
     return (ua > ub) - (ua < ub);
 }
 
+static gboolean virtio_iommu_remap(gpointer key, gpointer value, gpointer data)
+{
+    VirtIOIOMMUMapping *mapping = (VirtIOIOMMUMapping *) value;
+    VirtIOIOMMUInterval *interval = (VirtIOIOMMUInterval *) key;
+    IOMMUMemoryRegion *mr = (IOMMUMemoryRegion *) data;
+
+    trace_virtio_iommu_remap(interval->low, mapping->phys_addr,
+                             interval->high - interval->low + 1);
+    /* unmap previous entry and map again */
+    virtio_iommu_notify_unmap(mr, interval->low,
+                              interval->high - interval->low + 1);
+
+    virtio_iommu_notify_map(mr, interval->low, mapping->phys_addr,
+                            interval->high - interval->low + 1);
+    return false;
+}
+
+static void virtio_iommu_replay(IOMMUMemoryRegion *mr, IOMMUNotifier *n)
+{
+    IOMMUDevice *sdev = container_of(mr, IOMMUDevice, iommu_mr);
+    VirtIOIOMMU *s = sdev->viommu;
+    uint32_t sid;
+    VirtIOIOMMUEndpoint *ep;
+
+    sid = virtio_iommu_get_bdf(sdev);
+
+    qemu_mutex_lock(&s->mutex);
+
+    if (!s->endpoints) {
+        goto unlock;
+    }
+
+    ep = g_tree_lookup(s->endpoints, GUINT_TO_POINTER(sid));
+    if (!ep || !ep->domain) {
+        goto unlock;
+    }
+
+    g_tree_foreach(ep->domain->mappings, virtio_iommu_remap, mr);
+
+unlock:
+    qemu_mutex_unlock(&s->mutex);
+}
+
 static void virtio_iommu_device_realize(DeviceState *dev, Error **errp)
 {
     VirtIODevice *vdev = VIRTIO_DEVICE(dev);
@@ -976,6 +1019,7 @@ static void 
virtio_iommu_memory_region_class_init(ObjectClass *klass,
     IOMMUMemoryRegionClass *imrc = IOMMU_MEMORY_REGION_CLASS(klass);
 
     imrc->translate = virtio_iommu_translate;
+    imrc->replay = virtio_iommu_replay;
 }
 
 static const TypeInfo virtio_iommu_info = {
-- 
2.17.1