diff options
Diffstat (limited to 'hw/virtio/vhost.c')
| -rw-r--r-- | hw/virtio/vhost.c | 14 |
1 files changed, 13 insertions, 1 deletions
diff --git a/hw/virtio/vhost.c b/hw/virtio/vhost.c index 2bdb4fb231..a546a585da 100644 --- a/hw/virtio/vhost.c +++ b/hw/virtio/vhost.c @@ -1462,6 +1462,19 @@ int vhost_dev_init(struct vhost_dev *hdev, void *opaque, goto fail; } + limit = hdev->vhost_ops->vhost_backend_memslots_limit(hdev); + if (limit < MEMORY_DEVICES_SAFE_MAX_MEMSLOTS && + memory_devices_memslot_auto_decision_active()) { + error_setg(errp, "some memory device (like virtio-mem)" + " decided how many memory slots to use based on the overall" + " number of memory slots; this vhost backend would further" + " restricts the overall number of memory slots"); + error_append_hint(errp, "Try plugging this vhost backend before" + " plugging such memory devices.\n"); + r = -EINVAL; + goto fail; + } + for (i = 0; i < hdev->nvqs; ++i, ++n_initialized_vqs) { r = vhost_virtqueue_init(hdev, hdev->vqs + i, hdev->vq_index + i); if (r < 0) { @@ -1548,7 +1561,6 @@ int vhost_dev_init(struct vhost_dev *hdev, void *opaque, * but we'll need additional information about the reservations. */ reserved = memory_devices_get_reserved_memslots(); - limit = hdev->vhost_ops->vhost_backend_memslots_limit(hdev); if (used + reserved > limit) { error_setg(errp, "vhost backend memory slots limit (%d) is less" " than current number of used (%d) and reserved (%d)" |