static int vfio_connect_container(VFIOGroup *group, AddressSpace *as) { VFIOContainer *container; int ret, fd; VFIOAddressSpace *space; space = vfio_get_address_space(as); QLIST_FOREACH(container, &space->containers, next) { if (!ioctl(group->fd, VFIO_GROUP_SET_CONTAINER, &container->fd)) { group->container = container; QLIST_INSERT_HEAD(&container->group_list, group, container_next); return 0; } } fd = qemu_open("/dev/vfio/vfio", O_RDWR); if (fd < 0) { error_report("vfio: failed to open /dev/vfio/vfio: %m"); ret = -errno; goto put_space_exit; } ret = ioctl(fd, VFIO_GET_API_VERSION); if (ret != VFIO_API_VERSION) { error_report("vfio: supported vfio version: %d, " "reported version: %d", VFIO_API_VERSION, ret); ret = -EINVAL; goto close_fd_exit; } container = g_malloc0(sizeof(*container)); container->space = space; container->fd = fd; if (ioctl(fd, VFIO_CHECK_EXTENSION, VFIO_TYPE1_IOMMU) || ioctl(fd, VFIO_CHECK_EXTENSION, VFIO_TYPE1v2_IOMMU)) { bool v2 = !!ioctl(fd, VFIO_CHECK_EXTENSION, VFIO_TYPE1v2_IOMMU); struct vfio_iommu_type1_info info; ret = ioctl(group->fd, VFIO_GROUP_SET_CONTAINER, &fd); if (ret) { error_report("vfio: failed to set group container: %m"); ret = -errno; goto free_container_exit; } container->iommu_type = v2 ? VFIO_TYPE1v2_IOMMU : VFIO_TYPE1_IOMMU; ret = ioctl(fd, VFIO_SET_IOMMU, container->iommu_type); if (ret) { error_report("vfio: failed to set iommu for container: %m"); ret = -errno; goto free_container_exit; } /* * FIXME: This assumes that a Type1 IOMMU can map any 64-bit * IOVA whatsoever. That's not actually true, but the current * kernel interface doesn't tell us what it can map, and the * existing Type1 IOMMUs generally support any IOVA we're * going to actually try in practice. */ info.argsz = sizeof(info); ret = ioctl(fd, VFIO_IOMMU_GET_INFO, &info); /* Ignore errors */ if (ret || !(info.flags & VFIO_IOMMU_INFO_PGSIZES)) { /* Assume 4k IOVA page size */ info.iova_pgsizes = 4096; } vfio_host_win_add(container, 0, (hwaddr)-1, info.iova_pgsizes); } else if (ioctl(fd, VFIO_CHECK_EXTENSION, VFIO_SPAPR_TCE_IOMMU) || ioctl(fd, VFIO_CHECK_EXTENSION, VFIO_SPAPR_TCE_v2_IOMMU)) { struct vfio_iommu_spapr_tce_info info; bool v2 = !!ioctl(fd, VFIO_CHECK_EXTENSION, VFIO_SPAPR_TCE_v2_IOMMU); ret = ioctl(group->fd, VFIO_GROUP_SET_CONTAINER, &fd); if (ret) { error_report("vfio: failed to set group container: %m"); ret = -errno; goto free_container_exit; } container->iommu_type = v2 ? VFIO_SPAPR_TCE_v2_IOMMU : VFIO_SPAPR_TCE_IOMMU; ret = ioctl(fd, VFIO_SET_IOMMU, container->iommu_type); if (ret) { error_report("vfio: failed to set iommu for container: %m"); ret = -errno; goto free_container_exit; } /* * The host kernel code implementing VFIO_IOMMU_DISABLE is called * when container fd is closed so we do not call it explicitly * in this file. */ if (!v2) { ret = ioctl(fd, VFIO_IOMMU_ENABLE); if (ret) { error_report("vfio: failed to enable container: %m"); ret = -errno; goto free_container_exit; } } else { container->prereg_listener = vfio_prereg_listener; memory_listener_register(&container->prereg_listener, &address_space_memory); if (container->error) { memory_listener_unregister(&container->prereg_listener); error_report("vfio: RAM memory listener initialization failed for container"); goto free_container_exit; } } /* * This only considers the host IOMMU's 32-bit window. At * some point we need to add support for the optional 64-bit * window and dynamic windows */ info.argsz = sizeof(info); ret = ioctl(fd, VFIO_IOMMU_SPAPR_TCE_GET_INFO, &info); if (ret) { error_report("vfio: VFIO_IOMMU_SPAPR_TCE_GET_INFO failed: %m"); ret = -errno; if (v2) { memory_listener_unregister(&container->prereg_listener); } goto free_container_exit; } /* The default table uses 4K pages */ vfio_host_win_add(container, info.dma32_window_start, info.dma32_window_start + info.dma32_window_size - 1, 0x1000); } else { error_report("vfio: No available IOMMU models"); ret = -EINVAL; goto free_container_exit; } container->listener = vfio_memory_listener; memory_listener_register(&container->listener, container->space->as); if (container->error) { ret = container->error; error_report("vfio: memory listener initialization failed for container"); goto listener_release_exit; } container->initialized = true; QLIST_INIT(&container->group_list); QLIST_INSERT_HEAD(&space->containers, container, next); group->container = container; QLIST_INSERT_HEAD(&container->group_list, group, container_next); return 0; listener_release_exit: vfio_listener_release(container); free_container_exit: g_free(container); close_fd_exit: close(fd); put_space_exit: vfio_put_address_space(space); return ret; }