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authorStefano Garzarella <sgarzare@redhat.com>2021-03-15 19:34:38 +0300
committerMichael S. Tsirkin <mst@redhat.com>2021-05-03 11:55:52 +0300
commitf53d9910d009bc015b42d88114e2d86a93b0e6b7 (patch)
treef79287a3e556fb2b40c4e0cb1bad5bf93808b669 /drivers/vdpa
parent4080fc1067501707b9693b8003feae7d50d14e35 (diff)
downloadlinux-f53d9910d009bc015b42d88114e2d86a93b0e6b7.tar.xz
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 'drivers/vdpa')
-rw-r--r--drivers/vdpa/vdpa_sim/vdpa_sim.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/vdpa/vdpa_sim/vdpa_sim.c b/drivers/vdpa/vdpa_sim/vdpa_sim.c
index fc2ec9599753..a92c08880098 100644
--- a/drivers/vdpa/vdpa_sim/vdpa_sim.c
+++ b/drivers/vdpa/vdpa_sim/vdpa_sim.c
@@ -284,7 +284,8 @@ struct vdpasim *vdpasim_create(struct vdpasim_dev_attr *dev_attr)
goto err_iommu;
for (i = 0; i < dev_attr->nvqs; i++)
- vringh_set_iotlb(&vdpasim->vqs[i].vring, vdpasim->iommu);
+ vringh_set_iotlb(&vdpasim->vqs[i].vring, vdpasim->iommu,
+ &vdpasim->iommu_lock);
ret = iova_cache_get();
if (ret)