I'm not sure if this is a bug or my fault, but when I create a domain with a vTPM attached, detaching it sometimes causes the following error to be thrown (I post the command sequence):
[root@localhost ~]# xl create /etc/xen/vtpmmgr-stubdom Parsing config from /etc/xen/vtpmmgr-stubdom [root@localhost ~]# xl create /etc/xen/vtpm1 Parsing config from /etc/xen/vtpm1 [root@localhost ~]# xl create /etc/xen/dom1_ima Parsing config from /etc/xen/dom1_ima [root@localhost ~]# xl vtpm-detach dom1 vtpm1 [root@localhost ~]# xl destroy dom1 [root@localhost ~]# xl vtpm-detach vtpm1 vtpmmgr libxl: error: libxl_device.c:952:device_backend_callback: unable to remove device with path /local/domain/18/backend/vtpm/19/0 libxl: error: libxl.c:1995:device_addrm_aocomplete: unable to remove vtpm with id 0 libxl_device_vtpm_remove failed. Sometimes the error is raised while detaching vtpmmgr from vtpm (as reported), other times while detaching vtpm from domain. I think this could be a synchronization problem. I report some info: [root@localhost ~]# xl info host : localhost.localdomain release : 3.18.25-19.without_tpm.el7.centos.x86_64 version : #1 SMP Sun Apr 10 18:10:14 CEST 2016 machine : x86_64 nr_cpus : 2 max_cpu_id : 3 nr_nodes : 1 cores_per_socket : 2 threads_per_core : 1 cpu_mhz : 2394 hw_caps : bfebfbff:20100800:00000000:00000900:0408e3fd:00000000:00000001:00000000 virt_caps : hvm hvm_directio total_memory : 3996 free_memory : 2888 sharing_freed_memory : 0 sharing_used_memory : 0 outstanding_claims : 0 free_cpus : 0 xen_major : 4 xen_minor : 6 xen_extra : .1-5.el7 xen_version : 4.6.1-5.el7 xen_caps : xen-3.0-x86_64 xen-3.0-x86_32p hvm-3.0-x86_32 hvm-3.0-x86_32p hvm-3.0-x86_64 xen_scheduler : credit xen_pagesize : 4096 platform_params : virt_start=0xffff800000000000 xen_changeset : Tue Mar 29 11:02:43 2016 +0100 git:8210a62-dirty xen_commandline : placeholder dom0_mem=1024M,max:1024M cpuinfo com1=115200,8n1 console=com1,tty loglvl=all guest_loglvl=all cc_compiler : gcc (GCC) 4.8.5 20150623 (Red Hat 4.8.5-4) cc_compile_by : mockbuild cc_compile_domain : centos.org cc_compile_date : Tue Mar 29 12:15:50 UTC 2016 xend_config_format : 4 [root@localhost ~]# cat /etc/xen/vtpmmgr-stubdom name = "vtpmmgr" kernel="/usr/lib/xen/boot/vtpmmgr-stubdom.gz" memory=16 disk=["file:/srv/xen/vtpmmgr-stubdom.img,hda,w"] iomem=["fed40,5"] [root@localhost ~]# cat /etc/xen/vtpm1 name="vtpm1" kernel="/usr/lib/xen/boot/vtpm-stubdom.gz" memory=8 disk=["file:/srv/xen/vtpm1.img,hda,w"] vtpm=["backend=vtpmmgr,uuid=8aca22b3-768a-41e7-b2cb-123d23901996"] [root@localhost ~]# cat /etc/xen/dom1_ima kernel = "/srv/xen/vmlinuz-xen" ramdisk = "/srv/xen/initrd-xen" name = "dom1" memory = "512" disk = [ 'tap:aio:/srv/xen/dom1.img,xvda1,w' ] vcpus=1 root = '/dev/xvda1 ro' extra = 'ima_tcb' vtpm=['backend=vtpm1']
_______________________________________________ Xen-devel mailing list Xen-devel@lists.xen.org http://lists.xen.org/xen-devel