diff mbox series

[PULL,18/21] vdpa: move iommu_list to vhost_vdpa_shared

Message ID 8e0139ee409fcbedc940b61d09c022657e26bab3.1703582625.git.mst@redhat.com
State New
Headers show
Series [PULL,01/21] virtio: rng: Check notifier helpers for VIRTIO_CONFIG_IRQ_IDX | expand

Commit Message

Michael S. Tsirkin Dec. 26, 2023, 9:25 a.m. UTC 
From: Eugenio Pérez <eperezma@redhat.com>

Next patches will register the vhost_vdpa memory listener while the VM
is migrating at the destination, so we can map the memory to the device
before stopping the VM at the source.  The main goal is to reduce the
downtime.

However, the destination QEMU is unaware of which vhost_vdpa device will
register its memory_listener.  If the source guest has CVQ enabled, it
will be the CVQ device.  Otherwise, it  will be the first one.

Move the iommu_list member to VhostVDPAShared so all vhost_vdpa can use
it, rather than always in the first / last vhost_vdpa.

Signed-off-by: Eugenio Pérez <eperezma@redhat.com>
Acked-by: Jason Wang <jasowang@redhat.com>
Message-Id: <20231221174322.3130442-11-eperezma@redhat.com>
Tested-by: Lei Yang <leiyang@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
---
 include/hw/virtio/vhost-vdpa.h | 2 +-
 hw/virtio/vhost-vdpa.c         | 4 ++--
 2 files changed, 3 insertions(+), 3 deletions(-)
diff mbox series

Patch

diff --git a/include/hw/virtio/vhost-vdpa.h b/include/hw/virtio/vhost-vdpa.h
index 5bd964dac5..3880b9e7f2 100644
--- a/include/hw/virtio/vhost-vdpa.h
+++ b/include/hw/virtio/vhost-vdpa.h
@@ -34,6 +34,7 @@  typedef struct VhostVDPAHostNotifier {
 typedef struct vhost_vdpa_shared {
     int device_fd;
     struct vhost_vdpa_iova_range iova_range;
+    QLIST_HEAD(, vdpa_iommu) iommu_list;
 
     /* IOVA mapping used by the Shadow Virtqueue */
     VhostIOVATree *iova_tree;
@@ -62,7 +63,6 @@  typedef struct vhost_vdpa {
     struct vhost_dev *dev;
     Error *migration_blocker;
     VhostVDPAHostNotifier notifier[VIRTIO_QUEUE_MAX];
-    QLIST_HEAD(, vdpa_iommu) iommu_list;
     IOMMUNotifier n;
 } VhostVDPA;
 
diff --git a/hw/virtio/vhost-vdpa.c b/hw/virtio/vhost-vdpa.c
index cbfcf18883..a2713b9f0b 100644
--- a/hw/virtio/vhost-vdpa.c
+++ b/hw/virtio/vhost-vdpa.c
@@ -279,7 +279,7 @@  static void vhost_vdpa_iommu_region_add(MemoryListener *listener,
         return;
     }
 
-    QLIST_INSERT_HEAD(&v->iommu_list, iommu, iommu_next);
+    QLIST_INSERT_HEAD(&v->shared->iommu_list, iommu, iommu_next);
     memory_region_iommu_replay(iommu->iommu_mr, &iommu->n);
 
     return;
@@ -292,7 +292,7 @@  static void vhost_vdpa_iommu_region_del(MemoryListener *listener,
 
     struct vdpa_iommu *iommu;
 
-    QLIST_FOREACH(iommu, &v->iommu_list, iommu_next)
+    QLIST_FOREACH(iommu, &v->shared->iommu_list, iommu_next)
     {
         if (MEMORY_REGION(iommu->iommu_mr) == section->mr &&
             iommu->n.start == section->offset_within_region) {