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| author |   Stefano Garzarella <sgarzare@redhat.com> | 2021-03-15 17:34:38 +0100 |
|---|---|---|
| committer |   Michael S. Tsirkin <mst@redhat.com> | 2021-05-03 04:55:52 -0400 |
| commit | f53d9910d009bc015b42d88114e2d86a93b0e6b7 (patch) | |
| tree | f79287a3e556fb2b40c4e0cb1bad5bf93808b669 /include | |
| parent | vdpa_sim: use iova module to allocate IOVA addresses (diff) | |
| download | linux-dev-f53d9910d009bc015b42d88114e2d86a93b0e6b7.tar.xz linux-dev-f53d9910d009bc015b42d88114e2d86a93b0e6b7.zip | |
vringh: add 'iotlb_lock' to synchronize iotlb accesses
Usually iotlb accesses are synchronized with a spinlock.
Let's request it as a new parameter in vringh_set_iotlb() and
hold it when we navigate the iotlb in iotlb_translate() to avoid
race conditions with any new additions/deletions of ranges from
the ioltb.
Acked-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: Stefano Garzarella <sgarzare@redhat.com>
Link: https://lore.kernel.org/r/20210315163450.254396-3-sgarzare@redhat.com
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/vringh.h | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/include/linux/vringh.h b/include/linux/vringh.h index 59bd50f99291..9c077863c8f6 100644 --- a/include/linux/vringh.h +++ b/include/linux/vringh.h @@ -46,6 +46,9 @@ struct vringh { /* IOTLB for this vring */ struct vhost_iotlb *iotlb; + /* spinlock to synchronize IOTLB accesses */ + spinlock_t *iotlb_lock; + /* The function to call to notify the guest about added buffers */ void (*notify)(struct vringh *); }; @@ -258,7 +261,8 @@ static inline __virtio64 cpu_to_vringh64(const struct vringh *vrh, u64 val) #if IS_REACHABLE(CONFIG_VHOST_IOTLB) -void vringh_set_iotlb(struct vringh *vrh, struct vhost_iotlb *iotlb); +void vringh_set_iotlb(struct vringh *vrh, struct vhost_iotlb *iotlb, + spinlock_t *iotlb_lock); int vringh_init_iotlb(struct vringh *vrh, u64 features, unsigned int num, bool weak_barriers, |