Not able to start vm: qemu-system-aarch64: device requires x bytes, block backend provides x bytes

[tmeijn]

Required information

• Distribution: Ubuntu Asahi
• Distribution version: 24.04
• The output of "incus info":

incus info

config: {} api_extensions: - storage_zfs_remove_snapshots - container_host_shutdown_timeout - container_stop_priority - container_syscall_filtering - auth_pki - container_last_used_at - etag - patch - usb_devices - https_allowed_credentials - image_compression_algorithm - directory_manipulation - container_cpu_time - storage_zfs_use_refquota - storage_lvm_mount_options - network - profile_usedby - container_push - container_exec_recording - certificate_update - container_exec_signal_handling - gpu_devices - container_image_properties - migration_progress - id_map - network_firewall_filtering - network_routes - storage - file_delete - file_append - network_dhcp_expiry - storage_lvm_vg_rename - storage_lvm_thinpool_rename - network_vlan - image_create_aliases - container_stateless_copy - container_only_migration - storage_zfs_clone_copy - unix_device_rename - storage_lvm_use_thinpool - storage_rsync_bwlimit - network_vxlan_interface - storage_btrfs_mount_options - entity_description - image_force_refresh - storage_lvm_lv_resizing - id_map_base - file_symlinks - container_push_target - network_vlan_physical - storage_images_delete - container_edit_metadata - container_snapshot_stateful_migration - storage_driver_ceph - storage_ceph_user_name - resource_limits - storage_volatile_initial_source - storage_ceph_force_osd_reuse - storage_block_filesystem_btrfs - resources - kernel_limits - storage_api_volume_rename - network_sriov - console - restrict_dev_incus - migration_pre_copy - infiniband - dev_incus_events - proxy - network_dhcp_gateway - file_get_symlink - network_leases - unix_device_hotplug - storage_api_local_volume_handling - operation_description - clustering - event_lifecycle - storage_api_remote_volume_handling - nvidia_runtime - container_mount_propagation - container_backup - dev_incus_images - container_local_cross_pool_handling - proxy_unix - proxy_udp - clustering_join - proxy_tcp_udp_multi_port_handling - network_state - proxy_unix_dac_properties - container_protection_delete - unix_priv_drop - pprof_http - proxy_haproxy_protocol - network_hwaddr - proxy_nat - network_nat_order - container_full - backup_compression - nvidia_runtime_config - storage_api_volume_snapshots - storage_unmapped - projects - network_vxlan_ttl - container_incremental_copy - usb_optional_vendorid - snapshot_scheduling - snapshot_schedule_aliases - container_copy_project - clustering_server_address - clustering_image_replication - container_protection_shift - snapshot_expiry - container_backup_override_pool - snapshot_expiry_creation - network_leases_location - resources_cpu_socket - resources_gpu - resources_numa - kernel_features - id_map_current - event_location - storage_api_remote_volume_snapshots - network_nat_address - container_nic_routes - cluster_internal_copy - seccomp_notify - lxc_features - container_nic_ipvlan - network_vlan_sriov - storage_cephfs - container_nic_ipfilter - resources_v2 - container_exec_user_group_cwd - container_syscall_intercept - container_disk_shift - storage_shifted - resources_infiniband - daemon_storage - instances - image_types - resources_disk_sata - clustering_roles - images_expiry - resources_network_firmware - backup_compression_algorithm - ceph_data_pool_name - container_syscall_intercept_mount - compression_squashfs - container_raw_mount - container_nic_routed - container_syscall_intercept_mount_fuse - container_disk_ceph - virtual-machines - image_profiles - clustering_architecture - resources_disk_id - storage_lvm_stripes - vm_boot_priority - unix_hotplug_devices - api_filtering - instance_nic_network - clustering_sizing - firewall_driver - projects_limits - container_syscall_intercept_hugetlbfs - limits_hugepages - container_nic_routed_gateway - projects_restrictions - custom_volume_snapshot_expiry - volume_snapshot_scheduling - trust_ca_certificates - snapshot_disk_usage - clustering_edit_roles - container_nic_routed_host_address - container_nic_ipvlan_gateway - resources_usb_pci - resources_cpu_threads_numa - resources_cpu_core_die - api_os - container_nic_routed_host_table - container_nic_ipvlan_host_table - container_nic_ipvlan_mode - resources_system - images_push_relay - network_dns_search - container_nic_routed_limits - instance_nic_bridged_vlan - network_state_bond_bridge - usedby_consistency - custom_block_volumes - clustering_failure_domains - resources_gpu_mdev - console_vga_type - projects_limits_disk - network_type_macvlan - network_type_sriov - container_syscall_intercept_bpf_devices - network_type_ovn - projects_networks - projects_networks_restricted_uplinks - custom_volume_backup - backup_override_name - storage_rsync_compression - network_type_physical - network_ovn_external_subnets - network_ovn_nat - network_ovn_external_routes_remove - tpm_device_type - storage_zfs_clone_copy_rebase - gpu_mdev - resources_pci_iommu - resources_network_usb - resources_disk_address - network_physical_ovn_ingress_mode - network_ovn_dhcp - network_physical_routes_anycast - projects_limits_instances - network_state_vlan - instance_nic_bridged_port_isolation - instance_bulk_state_change - network_gvrp - instance_pool_move - gpu_sriov - pci_device_type - storage_volume_state - network_acl - migration_stateful - disk_state_quota - storage_ceph_features - projects_compression - projects_images_remote_cache_expiry - certificate_project - network_ovn_acl - projects_images_auto_update - projects_restricted_cluster_target - images_default_architecture - network_ovn_acl_defaults - gpu_mig - project_usage - network_bridge_acl - warnings - projects_restricted_backups_and_snapshots - clustering_join_token - clustering_description - server_trusted_proxy - clustering_update_cert - storage_api_project - server_instance_driver_operational - server_supported_storage_drivers - event_lifecycle_requestor_address - resources_gpu_usb - clustering_evacuation - network_ovn_nat_address - network_bgp - network_forward - custom_volume_refresh - network_counters_errors_dropped - metrics - image_source_project - clustering_config - network_peer - linux_sysctl - network_dns - ovn_nic_acceleration - certificate_self_renewal - instance_project_move - storage_volume_project_move - cloud_init - network_dns_nat - database_leader - instance_all_projects - clustering_groups - ceph_rbd_du - instance_get_full - qemu_metrics - gpu_mig_uuid - event_project - clustering_evacuation_live - instance_allow_inconsistent_copy - network_state_ovn - storage_volume_api_filtering - image_restrictions - storage_zfs_export - network_dns_records - storage_zfs_reserve_space - network_acl_log - storage_zfs_blocksize - metrics_cpu_seconds - instance_snapshot_never - certificate_token - instance_nic_routed_neighbor_probe - event_hub - agent_nic_config - projects_restricted_intercept - metrics_authentication - images_target_project - images_all_projects - cluster_migration_inconsistent_copy - cluster_ovn_chassis - container_syscall_intercept_sched_setscheduler - storage_lvm_thinpool_metadata_size - storage_volume_state_total - instance_file_head - instances_nic_host_name - image_copy_profile - container_syscall_intercept_sysinfo - clustering_evacuation_mode - resources_pci_vpd - qemu_raw_conf - storage_cephfs_fscache - network_load_balancer - vsock_api - instance_ready_state - network_bgp_holdtime - storage_volumes_all_projects - metrics_memory_oom_total - storage_buckets - storage_buckets_create_credentials - metrics_cpu_effective_total - projects_networks_restricted_access - storage_buckets_local - loki - acme - internal_metrics - cluster_join_token_expiry - remote_token_expiry - init_preseed - storage_volumes_created_at - cpu_hotplug - projects_networks_zones - network_txqueuelen - cluster_member_state - instances_placement_scriptlet - storage_pool_source_wipe - zfs_block_mode - instance_generation_id - disk_io_cache - amd_sev - storage_pool_loop_resize - migration_vm_live - ovn_nic_nesting - oidc - network_ovn_l3only - ovn_nic_acceleration_vdpa - cluster_healing - instances_state_total - auth_user - security_csm - instances_rebuild - numa_cpu_placement - custom_volume_iso - network_allocations - zfs_delegate - storage_api_remote_volume_snapshot_copy - operations_get_query_all_projects - metadata_configuration - syslog_socket - event_lifecycle_name_and_project - instances_nic_limits_priority - disk_initial_volume_configuration - operation_wait - image_restriction_privileged - cluster_internal_custom_volume_copy - disk_io_bus - storage_cephfs_create_missing - instance_move_config - ovn_ssl_config - certificate_description - disk_io_bus_virtio_blk - loki_config_instance - instance_create_start - clustering_evacuation_stop_options - boot_host_shutdown_action - agent_config_drive - network_state_ovn_lr - image_template_permissions - storage_bucket_backup - storage_lvm_cluster - shared_custom_block_volumes - auth_tls_jwt - oidc_claim - device_usb_serial - numa_cpu_balanced - image_restriction_nesting - network_integrations - instance_memory_swap_bytes - network_bridge_external_create api_status: stable api_version: "1.0" auth: trusted public: false auth_methods: - tls auth_user_name: tmeijn auth_user_method: unix environment: addresses: [] architectures: - aarch64 - armv6l - armv7l - armv8l certificate: | -----BEGIN CERTIFICATE----- MIICKTCCAbCgAwIBAgIQP6R5vEqyR/rGL9gIUj1PyzAKBggqhkjOPQQDAzBAMRkw FwYDVQQKExBMaW51eCBDb250YWluZXJzMSMwIQYDVQQDDBpyb290QGxvY2FsaG9z dC5sb2NhbGRvbWFpbjAeFw0yNDA3MDcxMjEwMzRaFw0zNDA3MDUxMjEwMzRaMEAx GTAXBgNVBAoTEExpbnV4IENvbnRhaW5lcnMxIzAhBgNVBAMMGnJvb3RAbG9jYWxo b3N0LmxvY2FsZG9tYWluMHYwEAYHKoZIzj0CAQYFK4EEACIDYgAExTGsaca/KGBr YhC7CgwQ38tfQ8V39M8n3SPbDWAw6oJ+uBgaRGnDuRXKK+Xzup4G+ZJs+Q5PHPbc 13+SgWgrBvjvqGEW5wiSBQ/nR3hfVlCFWEW/kk0T4yAKBx02tUWgo28wbTAOBgNV HQ8BAf8EBAMCBaAwEwYDVR0lBAwwCgYIKwYBBQUHAwEwDAYDVR0TAQH/BAIwADA4 BgNVHREEMTAvghVsb2NhbGhvc3QubG9jYWxkb21haW6HBH8AAAGHEAAAAAAAAAAA AAAAAAAAAAEwCgYIKoZIzj0EAwMDZwAwZAIwbreUnAk1+URU3On32pUbJqejuz7m wm20zLg0I3V1XLKMxc9qcByNCaXwFN58xsBTAjAg9CUOSB3QcgK539JwQkZsYSBQ 3DaZMEqcW6I3JNXCD2WQcd3SFCU8e/qfV2Ouo8w= -----END CERTIFICATE----- certificate_fingerprint: f94a04d5c8d6a94ad7d38810e1348b70cb4ed67b129c3d8c841e1e41e1219879 driver: lxc driver_version: 5.0.3 firewall: nftables kernel: Linux kernel_architecture: aarch64 kernel_features: idmapped_mounts: "true" netnsid_getifaddrs: "true" seccomp_listener: "true" seccomp_listener_continue: "true" uevent_injection: "true" unpriv_binfmt: "true" unpriv_fscaps: "true" kernel_version: 6.8.0-1011-asahi-arm lxc_features: cgroup2: "true" core_scheduling: "true" devpts_fd: "true" idmapped_mounts_v2: "true" mount_injection_file: "true" network_gateway_device_route: "true" network_ipvlan: "true" network_l2proxy: "true" network_phys_macvlan_mtu: "true" network_veth_router: "true" pidfd: "true" seccomp_allow_deny_syntax: "true" seccomp_notify: "true" seccomp_proxy_send_notify_fd: "true" os_name: Ubuntu os_version: "24.04" project: default server: incus server_clustered: false server_event_mode: full-mesh server_name: localhost.localdomain server_pid: 17498 server_version: 6.0.0 storage: "" storage_version: "" storage_supported_drivers: - name: dir version: "1" remote: false - name: lvm version: 2.03.16(2) (2022-05-18) / 1.02.185 (2022-05-18) / 4.48.0 remote: false - name: lvmcluster version: 2.03.16(2) (2022-05-18) / 1.02.185 (2022-05-18) / 4.48.0 remote: true

Issue description

I tried to run an image in virtual machine mode (--vm), but I immediately get the error below in the steps.

Steps to reproduce

1. run incus -v launch images:ubuntu/24.04 ubuntu-vm --vm:

❯ incus -v launch images:ubuntu/24.04 ubuntu-vm --vm
Launching ubuntu-vm
Error: Failed instance creation: Failed creating instance record: Instance type "virtual-machine" is not supported on this server: QEMU failed to run feature checks

Information to attach

❯ sudo cat /var/log/incus/incus.log.1
time="2024-07-07T14:25:28+02:00" level=error msg="Unable to run feature checks during QEMU initialization: QEMU premature exit: exit status 1 (qemu-system-aarch64: device requires 67108864 bytes, block backend provides 3653632 bytes)"
time="2024-07-07T14:25:28+02:00" level=warning msg="Instance type not operational" driver=qemu err="QEMU failed to run feature checks" type=virtual-machine

[stgraber]

It looks like you're using the native Ubuntu packages. Any chance you could use the lts-6.0 version of https://github.com/zabbly/incus ?

The error appears to be related to UEFI firmware files for QEMU. It's possible that the ones in Ubuntu are not properly size aligned so it'd be good to try using the Zabbly packages where arm64 firmware files are of a known correct size.

(It's also possible that the issue is due to this being on Apple Silicon. I remember Asahi having to operate with an unusual page size which may then cause issues like this.)

[stgraber]

@tmeijn