[Xen-users] Problems creating a simple hvm domU

[Matthew Dean <mcd40@xxxxxxxxx>]

I'm probably doing something stupid but I've been pulling my hair out 
trying to create my first hvm domU.  I have xen 4.2.1 installed (from 
source) on Ubuntu 12.10.  My config file for the vm is as follows:
#windows.cfg

builder='hvm'
memory = 2048
name = "Windows7Test"
disk = [ 'file:/xen-guests/img/windows7Test.img,hda,w' ]
on_poweroff = 'destroy'
on_reboot   = 'restart'
on_crash    = 'destroy'
boot="c"
sdl=0
vnc=1
vnclisten="127.0.0.1"
vncunused=1
vncconsole=0
vncpasswd=""
stdvga=1
serial='pty'
keymap='gb'

I've made this as simple as possible whilst enabling vnc so that I 
should be able to view the vm.  Note at this stage I don't even want to 
get to a windows install, I just want to start the vm.
Calling xl -vvv create -c windows.cfg gives

Parsing config from windowsTest.cfg
libxl: debug: libxl_create.c:1174:do_domain_create: ao 0x89fc10: create: 
how=(nil) callback=(nil) poller=0x89fa10
libxl: debug: libxl_device.c:229:libxl__device_disk_set_backend: Disk 
vdev=hda spec.backend=unknown
libxl: debug: libxl_device.c:175:disk_try_backend: Disk vdev=hda, 
backend phy unsuitable as phys path not a block device
libxl: debug: libxl_device.c:184:disk_try_backend: Disk vdev=hda, 
backend tap unsuitable because blktap not available
libxl: debug: libxl_device.c:265:libxl__device_disk_set_backend: Disk 
vdev=hda, using backend qdisk
libxl: debug: libxl_create.c:677:initiate_domain_create: running bootloader
libxl: debug: libxl_bootloader.c:321:libxl__bootloader_run: not a PV 
domain, skipping bootloader
libxl: debug: libxl_event.c:561:libxl__ev_xswatch_deregister: watch 
w=0x89ffc0: deregister unregistered
libxl: debug: libxl_numa.c:435:libxl__get_numa_candidate: New best NUMA 
placement candidate found: nr_nodes=1, nr_cpus=12, nr_vcpus=25, 
free_memkb=2816
libxl: detail: libxl_dom.c:192:numa_place_domain: NUMA placement 
candidate with 1 nodes, 12 cpus and 2816 KB free selected
xc: detail: elf_parse_binary: phdr: paddr=0x100000 memsz=0x9df68
xc: detail: elf_parse_binary: memory: 0x100000 -> 0x19df68
xc: info: VIRTUAL MEMORY ARRANGEMENT:
  Loader:        0000000000100000->000000000019df68
  TOTAL:         0000000000000000->000000007f800000
  ENTRY ADDRESS: 0000000000100000
xc: info: PHYSICAL MEMORY ALLOCATION:
  4KB PAGES: 0x0000000000000200
  2MB PAGES: 0x00000000000003fb
  1GB PAGES: 0x0000000000000000
xc: detail: elf_load_binary: phdr 0 at 0x0x7f20001ff000 -> 0x0x7f2000293df5
libxl: debug: libxl_device.c:229:libxl__device_disk_set_backend: Disk 
vdev=hda spec.backend=qdisk
libxl: debug: libxl_dm.c:1142:libxl__spawn_local_dm: Spawning 
device-model /usr/lib/xen/bin/qemu-dm with arguments:
libxl: debug: libxl_dm.c:1144:libxl__spawn_local_dm: 
/usr/lib/xen/bin/qemu-dm
libxl: debug: libxl_dm.c:1144:libxl__spawn_local_dm:   -d
libxl: debug: libxl_dm.c:1144:libxl__spawn_local_dm:   20
libxl: debug: libxl_dm.c:1144:libxl__spawn_local_dm:   -domain-name
libxl: debug: libxl_dm.c:1144:libxl__spawn_local_dm:   Windows7Test
libxl: debug: libxl_dm.c:1144:libxl__spawn_local_dm:   -vnc
libxl: debug: libxl_dm.c:1144:libxl__spawn_local_dm:   127.0.0.1:0
libxl: debug: libxl_dm.c:1144:libxl__spawn_local_dm:   -vncunused
libxl: debug: libxl_dm.c:1144:libxl__spawn_local_dm:   -k
libxl: debug: libxl_dm.c:1144:libxl__spawn_local_dm:   gb
libxl: debug: libxl_dm.c:1144:libxl__spawn_local_dm:   -serial
libxl: debug: libxl_dm.c:1144:libxl__spawn_local_dm:   pty
libxl: debug: libxl_dm.c:1144:libxl__spawn_local_dm:   -videoram
libxl: debug: libxl_dm.c:1144:libxl__spawn_local_dm:   8
libxl: debug: libxl_dm.c:1144:libxl__spawn_local_dm:   -std-vga
libxl: debug: libxl_dm.c:1144:libxl__spawn_local_dm:   -boot
libxl: debug: libxl_dm.c:1144:libxl__spawn_local_dm:   c
libxl: debug: libxl_dm.c:1144:libxl__spawn_local_dm:   -acpi
libxl: debug: libxl_dm.c:1144:libxl__spawn_local_dm:   -vcpu_avail
libxl: debug: libxl_dm.c:1144:libxl__spawn_local_dm:   0x01
libxl: debug: libxl_dm.c:1144:libxl__spawn_local_dm:   -net
libxl: debug: libxl_dm.c:1144:libxl__spawn_local_dm:   none
libxl: debug: libxl_dm.c:1144:libxl__spawn_local_dm:   -M
libxl: debug: libxl_dm.c:1144:libxl__spawn_local_dm:   xenfv
libxl: debug: libxl_event.c:512:libxl__ev_xswatch_register: watch 
w=0x8a01f8 wpath=/local/domain/0/device-model/20/state token=3/0: 
register slotnum=3
libxl: debug: libxl_create.c:1187:do_domain_create: ao 0x89fc10: 
inprogress: poller=0x89fa10, flags=i
libxl: debug: libxl_event.c:457:watchfd_callback: watch w=0x8a01f8 
wpath=/local/domain/0/device-model/20/state token=3/0: event 
epath=/local/domain/0/device-model/20/state
libxl: debug: libxl_event.c:549:libxl__ev_xswatch_deregister: watch 
w=0x8a01f8 wpath=/local/domain/0/device-model/20/state token=3/0: 
deregister slotnum=3
libxl: error: libxl_dm.c:1212:device_model_spawn_outcome: domain 20 
device model: spawn failed (rc=-3)
libxl: debug: libxl_event.c:1677:libxl__ao_progress_report: ao 0x89fc10: 
progress report: callback queued aop=0x8a33f0
libxl: debug: libxl_event.c:1499:libxl__ao_complete: ao 0x89fc10: 
complete, rc=0
libxl: debug: libxl_event.c:1090:egc_run_callbacks: ao 0x89fc10: 
progress report: callback aop=0x8a33f0
libxl: debug: libxl_event.c:1471:libxl__ao__destroy: ao 0x89fc10: destroy
Daemon running with PID 5631
xenconsole: Could not read tty from store: No such file or directory
libxl: error: libxl_exec.c:118:libxl_report_child_exitstatus: console 
child [0] exited with error status 2
xc: debug: hypercall buffer: total allocations:1154 total releases:1154
xc: debug: hypercall buffer: current allocations:0 maximum allocations:4
xc: debug: hypercall buffer: cache current size:4
xc: debug: hypercall buffer: cache hits:1145 misses:4 toobig:5

A domain is created and can be seen with xl list but it is not running.  
I do not know how to get any more debug information than this and all I 
can discern is that the spawn failed (rc=-3).
Any help would be greatly appreciated.

Matt


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