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vhost_iotlb: split out IOTLB initialization

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

Signed-off-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: Gautam Dawar <gdawar@xilinx.com>
Message-Id: <20220330180436.24644-9-gdawar@xilinx.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Gautam Dawar 2022-03-30 23:33:48 +05:30 committed by Michael S. Tsirkin
parent 46d554b1bc
commit 1cb108994c
2 changed files with 20 additions and 5 deletions
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23
drivers/vhost/iotlb.c
View File

@ -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;
}

2
include/linux/vhost_iotlb.h
View File

@ -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);