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Re: [Xen-devel] [PATCH v2] Handle xen_platform_pci=0 case



Wednesday, November 27, 2013, 7:21:33 PM, you wrote:

> Hi,

> Here is a little patch that attempt to fix the issue regarding
> xen_platform_pci=0 not been handled.

> There is one patch left from the previous version. The patch that was adding
> qemu_machine_override have been removed as it is unnecessary. If someone wants
> to change the -machine, it can always add it to device_model_args_hvm, as QEMU
> appear to use the last one.

> Regards,

> Anthony PERARD (1):
>   libxl: Handle xen_platform_pci=0 case with qemu-xen.

>  tools/libxl/libxl_dm.c | 12 ++++++++++--
>  1 file changed, 10 insertions(+), 2 deletions(-)


Hi Anthony,

I tried your patch, but qemu fails when xen_platform_pci=0 (still boots fine 
with xen_platform_pci=1).

The same guest + config boots fine when using qemu-xen-traditional with 
xen_platform_pci=0 or xen_platform_pci=1
(after Konrad's kernel patch is applied)

I can't pinpoint why qemu doesn't want to start .. from the verbose output from 
xl create:


~# xl -vvvvvvvv create /etc/xen/domU/production/xbmc.cfg
Parsing config from /etc/xen/domU/production/xbmc.cfg
libxl: debug: libxl_create.c:1296:do_domain_create: ao 0x22b1ed0: create: 
how=(nil) callback=(nil) poller=0x22b1f30
libxl: debug: libxl_device.c:251:libxl__device_disk_set_backend: Disk vdev=hda 
spec.backend=unknown
libxl: debug: libxl_device.c:286:libxl__device_disk_set_backend: Disk vdev=hda, 
using backend phy
libxl: debug: libxl_create.c:740: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:607:libxl__ev_xswatch_deregister: watch 
w=0x22b22b8: deregister unregistered
xc: detail: elf_parse_binary: phdr: paddr=0x100000 memsz=0x9efa8
xc: detail: elf_parse_binary: memory: 0x100000 -> 0x19efa8
xc: detail: VIRTUAL MEMORY ARRANGEMENT:
  Loader:        0000000000100000->000000000019efa8
  Modules:       0000000000000000->0000000000000000
  TOTAL:         0000000000000000->000000003f800000
  ENTRY ADDRESS: 0000000000100000
xc: detail: PHYSICAL MEMORY ALLOCATION:
  4KB PAGES: 0x0000000000000200
  2MB PAGES: 0x00000000000001fb
  1GB PAGES: 0x0000000000000000
xc: detail: elf_load_binary: phdr 0 at 0x7fbf4e4a1000 -> 0x7fbf4e536e2d
libxl: debug: libxl_device.c:251:libxl__device_disk_set_backend: Disk vdev=hda 
spec.backend=phy
libxl: debug: libxl_event.c:559:libxl__ev_xswatch_register: watch w=0x22b3728 
wpath=/local/domain/0/backend/vbd/20/768/state token=3/0: register slotnum=3
libxl: debug: libxl_create.c:1310:do_domain_create: ao 0x22b1ed0: inprogress: 
poller=0x22b1f30, flags=i
libxl: debug: libxl_event.c:503:watchfd_callback: watch w=0x22b3728 
wpath=/local/domain/0/backend/vbd/20/768/state token=3/0: event 
epath=/local/domain/0/backend/vbd/20/768/state
libxl: debug: libxl_event.c:646:devstate_watch_callback: backend 
/local/domain/0/backend/vbd/20/768/state wanted state 2 still waiting state 1
libxl: debug: libxl_event.c:503:watchfd_callback: watch w=0x22b3728 
wpath=/local/domain/0/backend/vbd/20/768/state token=3/0: event 
epath=/local/domain/0/backend/vbd/20/768/state
libxl: debug: libxl_event.c:642:devstate_watch_callback: backend 
/local/domain/0/backend/vbd/20/768/state wanted state 2 ok
libxl: debug: libxl_event.c:595:libxl__ev_xswatch_deregister: watch w=0x22b3728 
wpath=/local/domain/0/backend/vbd/20/768/state token=3/0: deregister slotnum=3
libxl: debug: libxl_event.c:607:libxl__ev_xswatch_deregister: watch 
w=0x22b3728: deregister unregistered
libxl: debug: libxl_device.c:1022:device_hotplug: calling hotplug script: 
/etc/xen/scripts/block add
libxl: debug: libxl_event.c:607:libxl__ev_xswatch_deregister: watch 
w=0x22b37b0: deregister unregistered
libxl: debug: libxl_event.c:607:libxl__ev_xswatch_deregister: watch 
w=0x22b37b0: deregister unregistered
libxl: debug: libxl_dm.c:1267:libxl__spawn_local_dm: Spawning device-model 
/usr/local/lib/xen/bin/qemu-system-i386 with arguments:
libxl: debug: libxl_dm.c:1269:libxl__spawn_local_dm:   
/usr/local/lib/xen/bin/qemu-system-i386
libxl: debug: libxl_dm.c:1269:libxl__spawn_local_dm:   -xen-domid
libxl: debug: libxl_dm.c:1269:libxl__spawn_local_dm:   20
libxl: debug: libxl_dm.c:1269:libxl__spawn_local_dm:   -chardev
libxl: debug: libxl_dm.c:1269:libxl__spawn_local_dm:   
socket,id=libxl-cmd,path=/var/run/xen/qmp-libxl-20,server,nowait
libxl: debug: libxl_dm.c:1269:libxl__spawn_local_dm:   -mon
libxl: debug: libxl_dm.c:1269:libxl__spawn_local_dm:   
chardev=libxl-cmd,mode=control
libxl: debug: libxl_dm.c:1269:libxl__spawn_local_dm:   -nodefaults
libxl: debug: libxl_dm.c:1269:libxl__spawn_local_dm:   -name
libxl: debug: libxl_dm.c:1269:libxl__spawn_local_dm:   xbmc
libxl: debug: libxl_dm.c:1269:libxl__spawn_local_dm:   -vnc
libxl: debug: libxl_dm.c:1269:libxl__spawn_local_dm:   
172.16.1.1:9,password,to=99
libxl: debug: libxl_dm.c:1269:libxl__spawn_local_dm:   -serial
libxl: debug: libxl_dm.c:1269:libxl__spawn_local_dm:   pty
libxl: debug: libxl_dm.c:1269:libxl__spawn_local_dm:   -device
libxl: debug: libxl_dm.c:1269:libxl__spawn_local_dm:   cirrus-vga
libxl: debug: libxl_dm.c:1269:libxl__spawn_local_dm:   -global
libxl: debug: libxl_dm.c:1269:libxl__spawn_local_dm:   vga.vram_size_mb=8
libxl: debug: libxl_dm.c:1269:libxl__spawn_local_dm:   -boot
libxl: debug: libxl_dm.c:1269:libxl__spawn_local_dm:   order=c
libxl: debug: libxl_dm.c:1269:libxl__spawn_local_dm:   -usb
libxl: debug: libxl_dm.c:1269:libxl__spawn_local_dm:   -usbdevice
libxl: debug: libxl_dm.c:1269:libxl__spawn_local_dm:   tablet
libxl: debug: libxl_dm.c:1269:libxl__spawn_local_dm:   -smp
libxl: debug: libxl_dm.c:1269:libxl__spawn_local_dm:   2,maxcpus=2
libxl: debug: libxl_dm.c:1269:libxl__spawn_local_dm:   -device
libxl: debug: libxl_dm.c:1269:libxl__spawn_local_dm:   
e1000,id=nic0,netdev=net0,mac=00:16:3a:c6:76:65
libxl: debug: libxl_dm.c:1269:libxl__spawn_local_dm:   -netdev
libxl: debug: libxl_dm.c:1269:libxl__spawn_local_dm:   
type=tap,id=net0,ifname=vif20.0-emu,script=no,downscript=no
libxl: debug: libxl_dm.c:1269:libxl__spawn_local_dm:   -machine
libxl: debug: libxl_dm.c:1269:libxl__spawn_local_dm:   pc,accel=xen
libxl: debug: libxl_dm.c:1269:libxl__spawn_local_dm:   -m
libxl: debug: libxl_dm.c:1269:libxl__spawn_local_dm:   1016
libxl: debug: libxl_dm.c:1269:libxl__spawn_local_dm:   -drive
libxl: debug: libxl_dm.c:1269:libxl__spawn_local_dm:   
file=/dev/xen_vms/xbmc,if=ide,index=0,media=disk,format=raw,cache=writeback
libxl: debug: libxl_event.c:559:libxl__ev_xswatch_register: watch w=0x22b24f0 
wpath=/local/domain/0/device-model/20/state token=3/1: register slotnum=3
libxl: debug: libxl_event.c:503:watchfd_callback: watch w=0x22b24f0 
wpath=/local/domain/0/device-model/20/state token=3/1: event 
epath=/local/domain/0/device-model/20/state
libxl: debug: libxl_event.c:595:libxl__ev_xswatch_deregister: watch w=0x22b24f0 
wpath=/local/domain/0/device-model/20/state token=3/1: deregister slotnum=3
libxl: error: libxl_dm.c:1335:device_model_spawn_outcome: domain 20 device 
model: spawn failed (rc=-3)
libxl: error: libxl_create.c:1140:domcreate_devmodel_started: device model did 
not start: -3
libxl: error: libxl_dm.c:1439:kill_device_model: Device Model already exited
libxl: debug: libxl_event.c:559:libxl__ev_xswatch_register: watch w=0x22b07e8 
wpath=/local/domain/0/backend/vbd/20/768/state token=3/2: register slotnum=3
libxl: debug: libxl_event.c:503:watchfd_callback: watch w=0x22b07e8 
wpath=/local/domain/0/backend/vbd/20/768/state token=3/2: event 
epath=/local/domain/0/backend/vbd/20/768/state
libxl: debug: libxl_event.c:642:devstate_watch_callback: backend 
/local/domain/0/backend/vbd/20/768/state wanted state 6 ok
libxl: debug: libxl_event.c:595:libxl__ev_xswatch_deregister: watch w=0x22b07e8 
wpath=/local/domain/0/backend/vbd/20/768/state token=3/2: deregister slotnum=3
libxl: debug: libxl_event.c:607:libxl__ev_xswatch_deregister: watch 
w=0x22b07e8: deregister unregistered
libxl: debug: libxl_device.c:1022:device_hotplug: calling hotplug script: 
/etc/xen/scripts/block remove
libxl: debug: libxl_event.c:472:watchfd_callback: watch 
epath=/local/domain/0/backend/vbd/20/768/state token=3/2: empty slot
libxl: debug: libxl_event.c:607:libxl__ev_xswatch_deregister: watch 
w=0x22b0870: deregister unregistered
libxl: debug: libxl_event.c:607:libxl__ev_xswatch_deregister: watch 
w=0x22b0870: deregister unregistered
libxl: debug: libxl_event.c:607:libxl__ev_xswatch_deregister: watch 
w=0x22b0b90: deregister unregistered
libxl: debug: libxl_event.c:1560:libxl__ao_complete: ao 0x22b1ed0: complete, 
rc=-3
libxl: debug: libxl_event.c:1532:libxl__ao__destroy: ao 0x22b1ed0: destroy
xc: debug: hypercall buffer: total allocations:700 total releases:700
xc: debug: hypercall buffer: current allocations:0 maximum allocations:2
xc: debug: hypercall buffer: cache current size:2
xc: debug: hypercall buffer: cache hits:696 misses:2 toobig:2

--
Sander


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