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-rw-r--r--drivers/vhost/iotlb.c23
-rw-r--r--include/linux/vhost_iotlb.h2
2 files changed, 20 insertions, 5 deletions
diff --git a/drivers/vhost/iotlb.c b/drivers/vhost/iotlb.c
index 5829cf2d0552..ea61330a3431 100644
--- a/drivers/vhost/iotlb.c
+++ b/drivers/vhost/iotlb.c
@@ -126,6 +126,23 @@ void vhost_iotlb_del_range(struct vhost_iotlb *iotlb, u64 start, u64 last)
EXPORT_SYMBOL_GPL(vhost_iotlb_del_range);
/**
+ * vhost_iotlb_init - initialize a vhost IOTLB
+ * @iotlb: the IOTLB that needs to be initialized
+ * @limit: maximum number of IOTLB entries
+ * @flags: VHOST_IOTLB_FLAG_XXX
+ */
+void vhost_iotlb_init(struct vhost_iotlb *iotlb, unsigned int limit,
+ unsigned int flags)
+{
+ iotlb->root = RB_ROOT_CACHED;
+ iotlb->limit = limit;
+ iotlb->nmaps = 0;
+ iotlb->flags = flags;
+ INIT_LIST_HEAD(&iotlb->list);
+}
+EXPORT_SYMBOL_GPL(vhost_iotlb_init);
+
+/**
* vhost_iotlb_alloc - add a new vhost IOTLB
* @limit: maximum number of IOTLB entries
* @flags: VHOST_IOTLB_FLAG_XXX
@@ -139,11 +156,7 @@ struct vhost_iotlb *vhost_iotlb_alloc(unsigned int limit, unsigned int flags)
if (!iotlb)
return NULL;
- iotlb->root = RB_ROOT_CACHED;
- iotlb->limit = limit;
- iotlb->nmaps = 0;
- iotlb->flags = flags;
- INIT_LIST_HEAD(&iotlb->list);
+ vhost_iotlb_init(iotlb, limit, flags);
return iotlb;
}
diff --git a/include/linux/vhost_iotlb.h b/include/linux/vhost_iotlb.h
index 2d0e2f52f938..e79a40838998 100644
--- a/include/linux/vhost_iotlb.h
+++ b/include/linux/vhost_iotlb.h
@@ -36,6 +36,8 @@ int vhost_iotlb_add_range(struct vhost_iotlb *iotlb, u64 start, u64 last,
u64 addr, unsigned int perm);
void vhost_iotlb_del_range(struct vhost_iotlb *iotlb, u64 start, u64 last);
+void vhost_iotlb_init(struct vhost_iotlb *iotlb, unsigned int limit,
+ unsigned int flags);
struct vhost_iotlb *vhost_iotlb_alloc(unsigned int limit, unsigned int flags);
void vhost_iotlb_free(struct vhost_iotlb *iotlb);
void vhost_iotlb_reset(struct vhost_iotlb *iotlb);