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vhost-iotlb: Add an opaque pointer for vhost IOTLB

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Add an opaque pointer for vhost IOTLB. And introduce
vhost_iotlb_add_range_ctx() to accept it.

Suggested-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: Xie Yongji <xieyongji@bytedance.com>
Acked-by: Jason Wang <jasowang@redhat.com>
Link: https://lore.kernel.org/r/20210831103634.33-8-xieyongji@bytedance.com
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Xie Yongji 2021-08-31 18:36:28 +08:00 committed by Michael S. Tsirkin
parent 7f05630dc6
commit 59dfe4f1e8
2 changed files with 19 additions and 4 deletions
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20
drivers/vhost/iotlb.c
View File

@ -36,19 +36,21 @@ void vhost_iotlb_map_free(struct vhost_iotlb *iotlb,
EXPORT_SYMBOL_GPL(vhost_iotlb_map_free);
/**
* vhost_iotlb_add_range - add a new range to vhost IOTLB
* vhost_iotlb_add_range_ctx - add a new range to vhost IOTLB
* @iotlb: the IOTLB
* @start: start of the IOVA range
* @last: last of IOVA range
* @addr: the address that is mapped to @start
* @perm: access permission of this range
* @opaque: the opaque pointer for the new mapping
*
* Returns an error last is smaller than start or memory allocation
* fails
*/
int vhost_iotlb_add_range(struct vhost_iotlb *iotlb,
u64 start, u64 last,
u64 addr, unsigned int perm)
int vhost_iotlb_add_range_ctx(struct vhost_iotlb *iotlb,
u64 start, u64 last,
u64 addr, unsigned int perm,
void *opaque)
{
struct vhost_iotlb_map *map;
@ -71,6 +73,7 @@ int vhost_iotlb_add_range(struct vhost_iotlb *iotlb,
map->last = last;
map->addr = addr;
map->perm = perm;
map->opaque = opaque;
iotlb->nmaps++;
vhost_iotlb_itree_insert(map, &iotlb->root);
@ -80,6 +83,15 @@ int vhost_iotlb_add_range(struct vhost_iotlb *iotlb,
return 0;
}
EXPORT_SYMBOL_GPL(vhost_iotlb_add_range_ctx);
int vhost_iotlb_add_range(struct vhost_iotlb *iotlb,
u64 start, u64 last,
u64 addr, unsigned int perm)
{
return vhost_iotlb_add_range_ctx(iotlb, start, last,
addr, perm, NULL);
}
EXPORT_SYMBOL_GPL(vhost_iotlb_add_range);
/**

3
include/linux/vhost_iotlb.h
View File

@ -17,6 +17,7 @@ struct vhost_iotlb_map {
u32 perm;
u32 flags_padding;
u64 __subtree_last;
void *opaque;
};
#define VHOST_IOTLB_FLAG_RETIRE 0x1
@ -29,6 +30,8 @@ struct vhost_iotlb {
unsigned int flags;
};
int vhost_iotlb_add_range_ctx(struct vhost_iotlb *iotlb, u64 start, u64 last,
u64 addr, unsigned int perm, void *opaque);
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);