Commit 1cb10899 authored by Gautam Dawar's avatar Gautam Dawar Committed by Michael S. Tsirkin
Browse files

vhost_iotlb: split out IOTLB initialization 



This patch splits out IOTLB initialization to make sure it could be
reused by external modules.

Signed-off-by: default avatarJason Wang <jasowang@redhat.com>
Signed-off-by: default avatarGautam Dawar <gdawar@xilinx.com>
Message-Id: <20220330180436.24644-9-gdawar@xilinx.com>
Signed-off-by: default avatarMichael S. Tsirkin <mst@redhat.com>
parent 46d554b1

drivers/vhost/iotlb.c

+18 −5
Original line number Diff line number Diff line
@@ -125,6 +125,23 @@ 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
@@ -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;

}

include/linux/vhost_iotlb.h

+2 −0
Original line number Diff line number Diff line
@@ -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);