u32 status;
u32 generation;
u64 features;
+ /* spinlock to synchronize iommu table */
+ spinlock_t iommu_lock;
};
/* TODO: cross-endian support */
for (i = 0; i < VDPASIM_VQ_NUM; i++)
vdpasim_vq_reset(&vdpasim->vqs[i]);
+ spin_lock(&vdpasim->iommu_lock);
vhost_iotlb_reset(vdpasim->iommu);
+ spin_unlock(&vdpasim->iommu_lock);
vdpasim->features = 0;
vdpasim->status = 0;
/* For simplicity, use identical mapping to avoid e.g iova
* allocator.
*/
+ spin_lock(&vdpasim->iommu_lock);
ret = vhost_iotlb_add_range(iommu, pa, pa + size - 1,
pa, dir_to_perm(dir));
+ spin_unlock(&vdpasim->iommu_lock);
if (ret)
return DMA_MAPPING_ERROR;
struct vdpasim *vdpasim = dev_to_sim(dev);
struct vhost_iotlb *iommu = vdpasim->iommu;
+ spin_lock(&vdpasim->iommu_lock);
vhost_iotlb_del_range(iommu, (u64)dma_addr,
(u64)dma_addr + size - 1);
+ spin_unlock(&vdpasim->iommu_lock);
}
static void *vdpasim_alloc_coherent(struct device *dev, size_t size,
void *addr = kmalloc(size, flag);
int ret;
- if (!addr)
+ spin_lock(&vdpasim->iommu_lock);
+ if (!addr) {
*dma_addr = DMA_MAPPING_ERROR;
- else {
+ } else {
u64 pa = virt_to_phys(addr);
ret = vhost_iotlb_add_range(iommu, (u64)pa,
} else
*dma_addr = (dma_addr_t)pa;
}
+ spin_unlock(&vdpasim->iommu_lock);
return addr;
}
struct vdpasim *vdpasim = dev_to_sim(dev);
struct vhost_iotlb *iommu = vdpasim->iommu;
+ spin_lock(&vdpasim->iommu_lock);
vhost_iotlb_del_range(iommu, (u64)dma_addr,
(u64)dma_addr + size - 1);
+ spin_unlock(&vdpasim->iommu_lock);
+
kfree(phys_to_virt((uintptr_t)dma_addr));
}
u64 start = 0ULL, last = 0ULL - 1;
int ret;
+ spin_lock(&vdpasim->iommu_lock);
vhost_iotlb_reset(vdpasim->iommu);
for (map = vhost_iotlb_itree_first(iotlb, start, last); map;
if (ret)
goto err;
}
+ spin_unlock(&vdpasim->iommu_lock);
return 0;
err:
vhost_iotlb_reset(vdpasim->iommu);
+ spin_unlock(&vdpasim->iommu_lock);
return ret;
}
u64 pa, u32 perm)
{
struct vdpasim *vdpasim = vdpa_to_sim(vdpa);
+ int ret;
- return vhost_iotlb_add_range(vdpasim->iommu, iova,
- iova + size - 1, pa, perm);
+ spin_lock(&vdpasim->iommu_lock);
+ ret = vhost_iotlb_add_range(vdpasim->iommu, iova, iova + size - 1, pa,
+ perm);
+ spin_unlock(&vdpasim->iommu_lock);
+
+ return ret;
}
static int vdpasim_dma_unmap(struct vdpa_device *vdpa, u64 iova, u64 size)
{
struct vdpasim *vdpasim = vdpa_to_sim(vdpa);
+ spin_lock(&vdpasim->iommu_lock);
vhost_iotlb_del_range(vdpasim->iommu, iova, iova + size - 1);
+ spin_unlock(&vdpasim->iommu_lock);
return 0;
}