diff options
Diffstat (limited to 'drivers/vfio/vfio_iommu_type1.c')
| -rw-r--r-- | drivers/vfio/vfio_iommu_type1.c | 30 |
1 files changed, 25 insertions, 5 deletions
diff --git a/drivers/vfio/vfio_iommu_type1.c b/drivers/vfio/vfio_iommu_type1.c index 0734fbe5b651..583ccdb2c58f 100644 --- a/drivers/vfio/vfio_iommu_type1.c +++ b/drivers/vfio/vfio_iommu_type1.c @@ -57,7 +57,8 @@ struct vfio_iommu { struct list_head domain_list; struct mutex lock; struct rb_root dma_list; - bool v2; + bool v2; + bool nesting; }; struct vfio_domain { @@ -705,6 +706,15 @@ static int vfio_iommu_type1_attach_group(void *iommu_data, goto out_free; } + if (iommu->nesting) { + int attr = 1; + + ret = iommu_domain_set_attr(domain->domain, DOMAIN_ATTR_NESTING, + &attr); + if (ret) + goto out_domain; + } + ret = iommu_attach_group(domain->domain, iommu_group); if (ret) goto out_domain; @@ -819,17 +829,26 @@ static void *vfio_iommu_type1_open(unsigned long arg) { struct vfio_iommu *iommu; - if (arg != VFIO_TYPE1_IOMMU && arg != VFIO_TYPE1v2_IOMMU) - return ERR_PTR(-EINVAL); - iommu = kzalloc(sizeof(*iommu), GFP_KERNEL); if (!iommu) return ERR_PTR(-ENOMEM); + switch (arg) { + case VFIO_TYPE1_IOMMU: + break; + case VFIO_TYPE1_NESTING_IOMMU: + iommu->nesting = true; + case VFIO_TYPE1v2_IOMMU: + iommu->v2 = true; + break; + default: + kfree(iommu); + return ERR_PTR(-EINVAL); + } + INIT_LIST_HEAD(&iommu->domain_list); iommu->dma_list = RB_ROOT; mutex_init(&iommu->lock); - iommu->v2 = (arg == VFIO_TYPE1v2_IOMMU); return iommu; } @@ -885,6 +904,7 @@ static long vfio_iommu_type1_ioctl(void *iommu_data, switch (arg) { case VFIO_TYPE1_IOMMU: case VFIO_TYPE1v2_IOMMU: + case VFIO_TYPE1_NESTING_IOMMU: return 1; case VFIO_DMA_CC_IOMMU: if (!iommu) |