Re: [Xen-devel] Unable to create guest PV domain on OMAP5432

[Andrii Anisov <andrii_anisov@xxxxxxxx>]

Hello Jayadev,

Please see my comments inlined:


On 08.11.17 07:17, Jayadev Kumaran wrote:
> Hello all,
>
> I'm trying to implement Xen hypervisor support on OMAP5432.I have 
> followed the steps as in 
> https://wiki.xenproject.org/wiki/Xen_ARM_with_Virtualization_Extensions/OMAP5432_uEVM 
> for the initial setup. I'm able to see the domain 0 successfully up.
> /root@omap5-evm:~# /etc/init.d/xencommons start
> Starting /usr/local/sbin/xenstored...
> Setting domain 0 name, domid and JSON config...
> Done setting up Dom0
> Starting xenconsoled...
> Starting QEMU as disk backend for dom0
> /
Never used QEMU as disk backend on ARM. We are using raw partition for a 
disk.
> /root@omap5-evm:~# xl list
> Name                                        ID   Mem VCPUs      
> State   Time(s)
> Domain-0                                     0   512 2     r-----      
> 11.5
> /
> I have used the below configuration file for creating a guest domain.
> "
> name = "ubuntu"
>
> kernel = "/home/root/ubuntu/vmlinuz"
> ramdisk = "/home/root/ubuntu/initrd.gz"
> #bootloader = "/usr/lib/xen-4.4/bin/pygrub"
>
> memory = 1024
> vcpus = 1
>
> device_model_version = 'qemu-xen-traditional'
I would suggest to run the stuff without this line.
> disk = [
>      '/dev/vg0/domu0,raw,xvda,rw'
Do you really have "/dev/vg0/domu0" in your dom0?
>        ]
>
> "
>
> But when I try to create the guest domain using xl create command,I 
> get the below error.
> /root@omap5-evm:/# xl create -d -c /etc/xen/config.d/ubuntu.cfg/
Please try adding ` xl -vvvv create -d -c /etc/xen/config.d/ubuntu.cfg` 
for getting more output./
/
> /
> Parsing config from /etc/xen/config.d/ubuntu.cfg
> {
>     "c_info": {
>         "type": "pv",
>         "name": "ubuntu",
>         "uuid": "d7dd7835-61e3-46ce-b76f-140c0f9673fe",
>         "run_hotplug_scripts": "True"
>     },
>     "b_info": {
>         "max_vcpus": 1,
>         "avail_vcpus": [
>             0
>         ],
>         "max_memkb": 1048576,
>         "target_memkb": 1048576,
>         "shadow_memkb": 9216,
>         "device_model_version": "qemu_xen_traditional",
>         "sched_params": {
>
>         },
>         "claim_mode": "True",
>         "kernel": "/home/root/ubuntu/vmlinuz",
>         "ramdisk": "/home/root/ubuntu/initrd.gz",
>         "type.pv": {
>
>         },
>         "arch_arm": {
>
>         }
>     },
>     "disks": [
>         {
>             "pdev_path": "/dev/vg0/domu0",
>             "vdev": "xvda",
>             "format": "raw",
>             "readwrite": 1
>         }
>     ],
>     "on_reboot": "restart",
>     "on_soft_reset": "soft_reset"
> }
> (XEN) grant_table.c:1688:d0v0 Expanding d4 grant table from 0 to 1 frames
> (XEN) memory.c:238:d0v0 Could not allocate order=18 extent: id=4 
> memflags=0xc0 (0 of 1)
> libxl: error: libxl_exec.c:118:libxl_report_child_exitstatus: 
> /etc/xen/scripts/block add [1612] exited with error status 1
> libxl: error: libxl_create.c:1278:domcreate_launch_dm: Domain 4:unable 
> to add disk devices
> libxl: error: libxl_domain.c:1000:libxl__destroy_domid: Domain 
> 4:Non-existant domain
> libxl: error: libxl_domain.c:959:domain_destroy_callback: Domain 
> 4:Unable to destroy guest
> libxl: error: libxl_domain.c:886:domain_destroy_cb: Domain 
> 4:Destruction of domain failed
> /
> Any input would be highly appreciated
BTW, what is your dom0 system? Does it have bash?
Long time ago, we had busybox in dom0, and used 
https://marc.info/?l=xen-devel&m=146358920813936&w=4 to workaround block 
device creation issues.
--

*Andrii Anisov*



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