diff options
Diffstat (limited to 'virt')
| -rw-r--r-- | virt/kvm/vfio.c | 59 |
1 files changed, 29 insertions, 30 deletions
diff --git a/virt/kvm/vfio.c b/virt/kvm/vfio.c index 512b3ca00f3f..3bd2615154d0 100644 --- a/virt/kvm/vfio.c +++ b/virt/kvm/vfio.c @@ -23,6 +23,7 @@ struct kvm_vfio_group { struct list_head node; + struct file *file; struct vfio_group *vfio_group; }; @@ -186,23 +187,17 @@ static int kvm_vfio_group_add(struct kvm_device *dev, unsigned int fd) struct kvm_vfio *kv = dev->private; struct vfio_group *vfio_group; struct kvm_vfio_group *kvg; - struct fd f; + struct file *filp; int ret; - f = fdget(fd); - if (!f.file) + filp = fget(fd); + if (!filp) return -EBADF; - vfio_group = kvm_vfio_group_get_external_user(f.file); - fdput(f); - - if (IS_ERR(vfio_group)) - return PTR_ERR(vfio_group); - mutex_lock(&kv->lock); list_for_each_entry(kvg, &kv->group_list, node) { - if (kvg->vfio_group == vfio_group) { + if (kvg->file == filp) { ret = -EEXIST; goto err_unlock; } @@ -214,6 +209,13 @@ static int kvm_vfio_group_add(struct kvm_device *dev, unsigned int fd) goto err_unlock; } + vfio_group = kvm_vfio_group_get_external_user(filp); + if (IS_ERR(vfio_group)) { + ret = PTR_ERR(vfio_group); + goto err_free; + } + + kvg->file = filp; list_add_tail(&kvg->node, &kv->group_list); kvg->vfio_group = vfio_group; @@ -225,9 +227,11 @@ static int kvm_vfio_group_add(struct kvm_device *dev, unsigned int fd) kvm_vfio_update_coherency(dev); return 0; +err_free: + kfree(kvg); err_unlock: mutex_unlock(&kv->lock); - kvm_vfio_group_put_external_user(vfio_group); + fput(filp); return ret; } @@ -258,6 +262,7 @@ static int kvm_vfio_group_del(struct kvm_device *dev, unsigned int fd) #endif kvm_vfio_group_set_kvm(kvg->vfio_group, NULL); kvm_vfio_group_put_external_user(kvg->vfio_group); + fput(kvg->file); kfree(kvg); ret = 0; break; @@ -278,10 +283,8 @@ static int kvm_vfio_group_set_spapr_tce(struct kvm_device *dev, { struct kvm_vfio_spapr_tce param; struct kvm_vfio *kv = dev->private; - struct vfio_group *vfio_group; struct kvm_vfio_group *kvg; struct fd f; - struct iommu_group *grp; int ret; if (copy_from_user(¶m, arg, sizeof(struct kvm_vfio_spapr_tce))) @@ -291,36 +294,31 @@ static int kvm_vfio_group_set_spapr_tce(struct kvm_device *dev, if (!f.file) return -EBADF; - vfio_group = kvm_vfio_group_get_external_user(f.file); - fdput(f); - - if (IS_ERR(vfio_group)) - return PTR_ERR(vfio_group); - - grp = kvm_vfio_group_get_iommu_group(vfio_group); - if (WARN_ON_ONCE(!grp)) { - ret = -EIO; - goto err_put_external; - } - ret = -ENOENT; mutex_lock(&kv->lock); list_for_each_entry(kvg, &kv->group_list, node) { - if (kvg->vfio_group != vfio_group) + struct iommu_group *grp; + + if (kvg->file != f.file) continue; + grp = kvm_vfio_group_get_iommu_group(kvg->vfio_group); + if (WARN_ON_ONCE(!grp)) { + ret = -EIO; + goto err_fdput; + } + ret = kvm_spapr_tce_attach_iommu_group(dev->kvm, param.tablefd, grp); + iommu_group_put(grp); break; } mutex_unlock(&kv->lock); - - iommu_group_put(grp); -err_put_external: - kvm_vfio_group_put_external_user(vfio_group); +err_fdput: + fdput(f); return ret; } #endif @@ -394,6 +392,7 @@ static void kvm_vfio_destroy(struct kvm_device *dev) #endif kvm_vfio_group_set_kvm(kvg->vfio_group, NULL); kvm_vfio_group_put_external_user(kvg->vfio_group); + fput(kvg->file); list_del(&kvg->node); kfree(kvg); kvm_arch_end_assignment(dev->kvm); |