[Pkg-xen-devel] Bug#988333: xen/4.14.3-1: VGA Intel IGD Passthrough to Debian Xen HVM DomUs not working: xl -vvv create log

Chuck Zmudzinski brchuckz at netscape.net
Wed Oct 27 18:23:06 BST 2021 

On 10/26/2021 10:06 AM, Chuck Zmudzinski wrote:
> On 10/25/2021 4:45 PM, Chuck Zmudzinski wrote:
>> On 10/23/2021 11:11 AM, Hans van Kranenburg wrote:
>>> Hi!
>>>
>>>> On 5/10/2021 1:33 PM, Chuck Zmudzinski wrote:
>>>>> [...] with buster and bullseye running as the Dom0, I can only get 
>>>>> the VGA/Passthrough feature to work with Windows Xen HVMs. I would 
>>>>> expect both Windows and Linux HVMs to work comparably well.
>>>
>>> A possible time-saver that I can recommend is to send a post to the
>>> upstream xen-users list [0] about this already. Like "Hi all, I'm
>>> starting a HVM Linux domU with Linux 5.10.70 on a Xen 4.14.3 system 
>>> with
>>> also 5.10.70 dom0 kernel, with this and this domU config file. It fails
>>> to start, this is the xl -vvv create output, and this error (the irq
>>> stuff) appears in the dom0 kernel log.". Try to keep it simple and not
>>> too long initially, without the surrounding stories, to increase chance
>>> of it being fully read.
>>
>> I can do this soon - I have some more interesting tests to share
>> here and with the Xen developers upstream.
>
> I will need to think a little about how to present this bug to
> the Xen upstream developers in a short and simple enough way
> for them to be likely to read it initially. For now, I will report here
> some results from the journal log entries of both Bullseye dom0
> and Bullseye domU for two different configurations. These logs
> are not generated with the -vvv option, but they do provide
> quite a bit of interesting information and are already
> somewhat overwhelming, even without the -vvv option. So
> I will hold off for now before making the logs even more verbose
> with -vvv.

Now I add output of xl create with -vvv option:

chuckz at debian:~$ sudo xl -vvv create bullseye-hvm.cfg
Parsing config from bullseye-hvm.cfg
libxl: debug: libxl_create.c:2017:do_domain_create: ao 0x55c97f27e180: 
create: how=(nil) callback=(nil) poller=0x55c97f27e220
libxl: detail: libxl_create.c:622:libxl__domain_make: passthrough: sync_pt
libxl: debug: libxl_device.c:379:libxl__device_disk_set_backend: Disk 
vdev=xvda spec.backend=unknown
libxl: debug: libxl_device.c:413:libxl__device_disk_set_backend: Disk 
vdev=xvda, using backend phy
libxl: debug: libxl_device.c:379:libxl__device_disk_set_backend: Disk 
vdev=xvdb spec.backend=unknown
libxl: debug: libxl_device.c:413:libxl__device_disk_set_backend: Disk 
vdev=xvdb, using backend phy
libxl: debug: libxl_create.c:1279:initiate_domain_create: Domain 
2:running bootloader
libxl: debug: libxl_bootloader.c:328:libxl__bootloader_run: Domain 2:not 
a PV/PVH domain, skipping bootloader
libxl: debug: libxl_event.c:864:libxl__ev_xswatch_deregister: watch 
w=0x55c97f284148: deregister unregistered
libxl: detail: libxl_x86.c:338:hvm_set_viridian_features: base group enabled
libxl: detail: libxl_x86.c:338:hvm_set_viridian_features: freq group enabled
libxl: detail: libxl_x86.c:338:hvm_set_viridian_features: time_ref_count 
group enabled
libxl: detail: libxl_x86.c:338:hvm_set_viridian_features: apic_assist 
group enabled
libxl: detail: libxl_x86.c:338:hvm_set_viridian_features: crash_ctl 
group enabled
domainbuilder: detail: xc_dom_allocate: cmdline="", features=""
domainbuilder: detail: xc_dom_kernel_file: 
filename="/usr/lib/xen-4.14/boot/hvmloader"
domainbuilder: detail: xc_dom_malloc_filemap    : 329 kB
libxl: debug: libxl_dom.c:829:libxl__load_hvm_firmware_module: Loading 
BIOS: /usr/share/seabios/bios-256k.bin
domainbuilder: detail: xc_dom_boot_xen_init: ver 4.14, caps 
xen-3.0-x86_64 hvm-3.0-x86_32 hvm-3.0-x86_32p hvm-3.0-x86_64
domainbuilder: detail: xc_dom_parse_image: called
domainbuilder: detail: xc_dom_find_loader: trying multiboot-binary 
loader ...
domainbuilder: detail: loader probe failed
domainbuilder: detail: xc_dom_find_loader: trying HVM-generic loader ...
domainbuilder: detail: loader probe OK
xc: detail: ELF: phdr: paddr=0x100000 memsz=0x5bfc4
xc: detail: ELF: memory: 0x100000 -> 0x15bfc4
domainbuilder: detail: xc_dom_mem_init: mem 3072 MB, pages 0xc0000 
pages, 4k each
domainbuilder: detail: xc_dom_mem_init: 0xc0000 pages
domainbuilder: detail: xc_dom_boot_mem_init: called
domainbuilder: detail: range: start=0x0 end=0xc0000000
xc: detail: PHYSICAL MEMORY ALLOCATION:
xc: detail:   4KB PAGES: 0x0000000000000200
xc: detail:   2MB PAGES: 0x00000000000001ff
xc: detail:   1GB PAGES: 0x0000000000000002
domainbuilder: detail: xc_dom_build_image: called
domainbuilder: detail: xc_dom_pfn_to_ptr_retcount: domU mapping: pfn 
0x100+0x5c at 0x7f20de301000
domainbuilder: detail: xc_dom_alloc_segment:   kernel       : 0x100000 
-> 0x15c000  (pfn 0x100 + 0x5c pages)
xc: detail: ELF: phdr 0 at 0x7f20de2a5000 -> 0x7f20de2f7420
domainbuilder: detail: xc_dom_pfn_to_ptr_retcount: domU mapping: pfn 
0x15c+0x40 at 0x7f20de2c1000
domainbuilder: detail: xc_dom_alloc_segment:   System Firmware module : 
0x15c000 -> 0x19c000  (pfn 0x15c + 0x40 pages)
domainbuilder: detail: xc_dom_pfn_to_ptr_retcount: domU mapping: pfn 
0x19c+0x1 at 0x7f20de7e2000
domainbuilder: detail: xc_dom_alloc_segment:   HVM start info : 0x19c000 
-> 0x19d000  (pfn 0x19c + 0x1 pages)
domainbuilder: detail: xc_dom_build_image  : virt_alloc_end : 0x19d000
domainbuilder: detail: xc_dom_build_image  : virt_pgtab_end : 0x0
domainbuilder: detail: xc_dom_boot_image: called
domainbuilder: detail: xc_dom_compat_check: supported guest type: 
xen-3.0-x86_64
domainbuilder: detail: xc_dom_compat_check: supported guest type: 
hvm-3.0-x86_32 <= matches
domainbuilder: detail: xc_dom_compat_check: supported guest type: 
hvm-3.0-x86_32p
domainbuilder: detail: xc_dom_compat_check: supported guest type: 
hvm-3.0-x86_64
domainbuilder: detail: domain builder memory footprint
domainbuilder: detail:    allocated
domainbuilder: detail:       malloc             : 6856 bytes
domainbuilder: detail:       anon mmap          : 0 bytes
domainbuilder: detail:    mapped
domainbuilder: detail:       file mmap          : 329 kB
domainbuilder: detail:       domU mmap          : 628 kB
domainbuilder: detail: vcpu_hvm: called
domainbuilder: detail: xc_dom_set_gnttab_entry: d2 gnt[0] -> d0 0xfefff
domainbuilder: detail: xc_dom_set_gnttab_entry: d2 gnt[1] -> d0 0xfeffc
domainbuilder: detail: xc_dom_release: called
libxl: debug: libxl_device.c:379:libxl__device_disk_set_backend: Disk 
vdev=xvda spec.backend=phy
libxl: debug: libxl_event.c:813:libxl__ev_xswatch_register: watch 
w=0x55c97f28ed50 wpath=/local/domain/0/backend/vbd/2/51712/state 
token=3/0: register slotnum=3
libxl: debug: libxl_device.c:379:libxl__device_disk_set_backend: Disk 
vdev=xvdb spec.backend=phy
libxl: debug: libxl_event.c:813:libxl__ev_xswatch_register: watch 
w=0x55c97f288f70 wpath=/local/domain/0/backend/vbd/2/51728/state 
token=2/1: register slotnum=2
libxl: debug: libxl_create.c:2055:do_domain_create: ao 0x55c97f27e180: 
inprogress: poller=0x55c97f27e220, flags=i
libxl: debug: libxl_event.c:750:watchfd_callback: watch w=0x55c97f28ed50 
wpath=/local/domain/0/backend/vbd/2/51712/state token=3/0: event 
epath=/local/domain/0/backend/vbd/2/51712/state
libxl: debug: libxl_event.c:1052:devstate_callback: backend 
/local/domain/0/backend/vbd/2/51712/state wanted state 2 ok
libxl: debug: libxl_event.c:850:libxl__ev_xswatch_deregister: watch 
w=0x55c97f28ed50 wpath=/local/domain/0/backend/vbd/2/51712/state 
token=3/0: deregister slotnum=3
libxl: debug: libxl_device.c:1090:device_backend_callback: Domain 
2:calling device_backend_cleanup
libxl: debug: libxl_event.c:864:libxl__ev_xswatch_deregister: watch 
w=0x55c97f28ed50: deregister unregistered
libxl: debug: libxl_linux.c:194:libxl__hotplug_disk: Domain 2:Args and 
environment ready
libxl: debug: libxl_device.c:1191:device_hotplug: Domain 2:calling 
hotplug script: /etc/xen/scripts/block add
libxl: debug: libxl_device.c:1192:device_hotplug: Domain 2:extra args:
libxl: debug: libxl_device.c:1200:device_hotplug: Domain 2:env:
libxl: debug: libxl_device.c:1207:device_hotplug: Domain 2: script: 
/etc/xen/scripts/block
libxl: debug: libxl_device.c:1207:device_hotplug: Domain 2: XENBUS_TYPE: vbd
libxl: debug: libxl_device.c:1207:device_hotplug: Domain 2: XENBUS_PATH: 
backend/vbd/2/51712
libxl: debug: libxl_device.c:1207:device_hotplug: Domain 2: 
XENBUS_BASE_PATH: backend
libxl: debug: libxl_aoutils.c:593:libxl__async_exec_start: forking to 
execute: /etc/xen/scripts/block add
libxl: debug: libxl_event.c:720:watchfd_callback: watch 
epath=/local/domain/0/backend/vbd/2/51712/state token=3/0: empty slot
libxl: debug: libxl_event.c:750:watchfd_callback: watch w=0x55c97f288f70 
wpath=/local/domain/0/backend/vbd/2/51728/state token=2/1: event 
epath=/local/domain/0/backend/vbd/2/51728/state
libxl: debug: libxl_event.c:1055:devstate_callback: backend 
/local/domain/0/backend/vbd/2/51728/state wanted state 2 still waiting 
state 1
libxl: debug: libxl_event.c:750:watchfd_callback: watch w=0x55c97f288f70 
wpath=/local/domain/0/backend/vbd/2/51728/state token=2/1: event 
epath=/local/domain/0/backend/vbd/2/51728/state
libxl: debug: libxl_event.c:1052:devstate_callback: backend 
/local/domain/0/backend/vbd/2/51728/state wanted state 2 ok
libxl: debug: libxl_event.c:850:libxl__ev_xswatch_deregister: watch 
w=0x55c97f288f70 wpath=/local/domain/0/backend/vbd/2/51728/state 
token=2/1: deregister slotnum=2
libxl: debug: libxl_device.c:1090:device_backend_callback: Domain 
2:calling device_backend_cleanup
libxl: debug: libxl_event.c:864:libxl__ev_xswatch_deregister: watch 
w=0x55c97f288f70: deregister unregistered
libxl: debug: libxl_linux.c:194:libxl__hotplug_disk: Domain 2:Args and 
environment ready
libxl: debug: libxl_device.c:1191:device_hotplug: Domain 2:calling 
hotplug script: /etc/xen/scripts/block add
libxl: debug: libxl_device.c:1192:device_hotplug: Domain 2:extra args:
libxl: debug: libxl_device.c:1200:device_hotplug: Domain 2:env:
libxl: debug: libxl_device.c:1207:device_hotplug: Domain 2: script: 
/etc/xen/scripts/block
libxl: debug: libxl_device.c:1207:device_hotplug: Domain 2: XENBUS_TYPE: vbd
libxl: debug: libxl_device.c:1207:device_hotplug: Domain 2: XENBUS_PATH: 
backend/vbd/2/51728
libxl: debug: libxl_device.c:1207:device_hotplug: Domain 2: 
XENBUS_BASE_PATH: backend
libxl: debug: libxl_aoutils.c:593:libxl__async_exec_start: forking to 
execute: /etc/xen/scripts/block add
libxl: debug: libxl_event.c:864:libxl__ev_xswatch_deregister: watch 
w=0x55c97f28ee50: deregister unregistered
libxl: debug: libxl_linux.c:211:libxl__get_hotplug_script_info: Domain 
2:num_exec 1, not running hotplug scripts
libxl: debug: libxl_device.c:1176:device_hotplug: Domain 2:No hotplug 
script to execute
libxl: debug: libxl_event.c:864:libxl__ev_xswatch_deregister: watch 
w=0x55c97f28ee50: deregister unregistered
libxl: debug: libxl_event.c:864:libxl__ev_xswatch_deregister: watch 
w=0x55c97f289070: deregister unregistered
libxl: debug: libxl_linux.c:211:libxl__get_hotplug_script_info: Domain 
2:num_exec 1, not running hotplug scripts
libxl: debug: libxl_device.c:1176:device_hotplug: Domain 2:No hotplug 
script to execute
libxl: debug: libxl_event.c:864:libxl__ev_xswatch_deregister: watch 
w=0x55c97f289070: deregister unregistered
libxl: debug: libxl_dm.c:177:libxl__domain_get_device_model_uid: Domain 
2:dm_restrict disabled, starting QEMU as root
libxl: debug: libxl_disk.c:1115:libxl__device_disk_find_local_path: 
Directly accessing local RAW disk /dev/systems/linux
libxl: debug: libxl_disk.c:1115:libxl__device_disk_find_local_path: 
Directly accessing local RAW disk /dev/data/linuxdata
libxl: debug: libxl_dm.c:2946:libxl__spawn_local_dm: Domain 2:Spawning 
device-model /usr/bin/qemu-system-i386 with arguments:
libxl: debug: libxl_dm.c:2948:libxl__spawn_local_dm: Domain 2: 
/usr/bin/qemu-system-i386
libxl: debug: libxl_dm.c:2948:libxl__spawn_local_dm: Domain 2: -xen-domid
libxl: debug: libxl_dm.c:2948:libxl__spawn_local_dm: Domain 2:  2
libxl: debug: libxl_dm.c:2948:libxl__spawn_local_dm: Domain 2: -no-shutdown
libxl: debug: libxl_dm.c:2948:libxl__spawn_local_dm: Domain 2: -chardev
libxl: debug: libxl_dm.c:2948:libxl__spawn_local_dm: Domain 2: 
socket,id=libxl-cmd,path=/var/run/xen/qmp-libxl-2,server,nowait
libxl: debug: libxl_dm.c:2948:libxl__spawn_local_dm: Domain 2:  -mon
libxl: debug: libxl_dm.c:2948:libxl__spawn_local_dm: Domain 2: 
chardev=libxl-cmd,mode=control
libxl: debug: libxl_dm.c:2948:libxl__spawn_local_dm: Domain 2: -chardev
libxl: debug: libxl_dm.c:2948:libxl__spawn_local_dm: Domain 2: 
socket,id=libxenstat-cmd,path=/var/run/xen/qmp-libxenstat-2,server,nowait
libxl: debug: libxl_dm.c:2948:libxl__spawn_local_dm: Domain 2:  -mon
libxl: debug: libxl_dm.c:2948:libxl__spawn_local_dm: Domain 2: 
chardev=libxenstat-cmd,mode=control
libxl: debug: libxl_dm.c:2948:libxl__spawn_local_dm: Domain 2: -nodefaults
libxl: debug: libxl_dm.c:2948:libxl__spawn_local_dm: Domain 2: 
-no-user-config
libxl: debug: libxl_dm.c:2948:libxl__spawn_local_dm: Domain 2: -name
libxl: debug: libxl_dm.c:2948:libxl__spawn_local_dm: Domain 2: bullseye-hvm
libxl: debug: libxl_dm.c:2948:libxl__spawn_local_dm: Domain 2:  -vnc
libxl: debug: libxl_dm.c:2948:libxl__spawn_local_dm: Domain 2:  none
libxl: debug: libxl_dm.c:2948:libxl__spawn_local_dm: Domain 2: -display
libxl: debug: libxl_dm.c:2948:libxl__spawn_local_dm: Domain 2:  none
libxl: debug: libxl_dm.c:2948:libxl__spawn_local_dm: Domain 2: -serial
libxl: debug: libxl_dm.c:2948:libxl__spawn_local_dm: Domain 2:  pty
libxl: debug: libxl_dm.c:2948:libxl__spawn_local_dm: Domain 2: -boot
libxl: debug: libxl_dm.c:2948:libxl__spawn_local_dm: Domain 2: order=c
libxl: debug: libxl_dm.c:2948:libxl__spawn_local_dm: Domain 2:  -smp
libxl: debug: libxl_dm.c:2948:libxl__spawn_local_dm: Domain 2: 4,maxcpus=4
libxl: debug: libxl_dm.c:2948:libxl__spawn_local_dm: Domain 2: -device
libxl: debug: libxl_dm.c:2948:libxl__spawn_local_dm: Domain 2: 
e1000,id=nic0,netdev=net0,mac=xx:xx:xx:xx:xx:xx
libxl: debug: libxl_dm.c:2948:libxl__spawn_local_dm: Domain 2: -netdev
libxl: debug: libxl_dm.c:2948:libxl__spawn_local_dm: Domain 2: 
type=tap,id=net0,ifname=vif2.0-emu,script=no,downscript=no
libxl: debug: libxl_dm.c:2948:libxl__spawn_local_dm: Domain 2: -machine
libxl: debug: libxl_dm.c:2948:libxl__spawn_local_dm: Domain 2: 
xenfv,igd-passthru=on
libxl: debug: libxl_dm.c:2948:libxl__spawn_local_dm: Domain 2:  -m
libxl: debug: libxl_dm.c:2948:libxl__spawn_local_dm: Domain 2:  3072
libxl: debug: libxl_dm.c:2948:libxl__spawn_local_dm: Domain 2: -drive
libxl: debug: libxl_dm.c:2948:libxl__spawn_local_dm: Domain 2: 
file=/dev/systems/linux,if=ide,index=0,media=disk,format=raw,cache=writeback
libxl: debug: libxl_dm.c:2948:libxl__spawn_local_dm: Domain 2: -drive
libxl: debug: libxl_dm.c:2948:libxl__spawn_local_dm: Domain 2: 
file=/dev/data/linuxdata,if=ide,index=1,media=disk,format=raw,cache=writeback
libxl: debug: libxl_dm.c:2950:libxl__spawn_local_dm: Domain 2:Spawning 
device-model /usr/bin/qemu-system-i386 with additional environment:
libxl: debug: libxl_dm.c:2952:libxl__spawn_local_dm: Domain 2: 
XEN_QEMU_CONSOLE_LIMIT=1048576
libxl: debug: libxl_event.c:813:libxl__ev_xswatch_register: watch 
w=0x55c97f284440 wpath=/local/domain/0/device-model/2/state token=2/2: 
register slotnum=2
libxl: debug: libxl_event.c:750:watchfd_callback: watch w=0x55c97f284440 
wpath=/local/domain/0/device-model/2/state token=2/2: event 
epath=/local/domain/0/device-model/2/state
libxl: debug: libxl_exec.c:407:spawn_watch_event: domain 2 device model: 
spawn watch p=(null)
libxl: debug: libxl_event.c:750:watchfd_callback: watch w=0x55c97f284440 
wpath=/local/domain/0/device-model/2/state token=2/2: event 
epath=/local/domain/0/device-model/2/state
libxl: debug: libxl_exec.c:407:spawn_watch_event: domain 2 device model: 
spawn watch p=running
libxl: debug: libxl_event.c:850:libxl__ev_xswatch_deregister: watch 
w=0x55c97f284440 wpath=/local/domain/0/device-model/2/state token=2/2: 
deregister slotnum=2
libxl: debug: libxl_exec.c:127:libxl_report_child_exitstatus: domain 2 
device model (dying as expected) [2843] died due to fatal signal Killed
libxl: debug: libxl_event.c:864:libxl__ev_xswatch_deregister: watch 
w=0x55c97f284440: deregister unregistered
libxl: debug: libxl_qmp.c:1883:libxl__ev_qmp_send: Domain 2: ev 
0x55c97f284458, cmd 'query-chardev'
libxl: debug: libxl_qmp.c:1323:qmp_ev_lock_aquired: Domain 2:Connecting 
to /var/run/xen/qmp-libxl-2
libxl: debug: libxl_qmp.c:1698:qmp_ev_handle_message: Domain 2:QEMU 
version: 5.2.0
libxl: debug: libxl_qmp.c:1883:libxl__ev_qmp_send: Domain 2: ev 
0x55c97f284458, cmd 'query-vnc'
libxl: debug: libxl_qmp.c:1919:libxl__ev_qmp_dispose: Domain 2: ev 
0x55c97f284458
libxl: debug: libxl_event.c:813:libxl__ev_xswatch_register: watch 
w=0x55c97f290b80 wpath=/local/domain/0/backend/vif/2/0/state token=2/3: 
register slotnum=2
libxl: debug: libxl_event.c:750:watchfd_callback: watch w=0x55c97f290b80 
wpath=/local/domain/0/backend/vif/2/0/state token=2/3: event 
epath=/local/domain/0/backend/vif/2/0/state
libxl: debug: libxl_event.c:1055:devstate_callback: backend 
/local/domain/0/backend/vif/2/0/state wanted state 2 still waiting state 1
libxl: debug: libxl_event.c:750:watchfd_callback: watch w=0x55c97f290b80 
wpath=/local/domain/0/backend/vif/2/0/state token=2/3: event 
epath=/local/domain/0/backend/vif/2/0/state
libxl: debug: libxl_event.c:1052:devstate_callback: backend 
/local/domain/0/backend/vif/2/0/state wanted state 2 ok
libxl: debug: libxl_event.c:850:libxl__ev_xswatch_deregister: watch 
w=0x55c97f290b80 wpath=/local/domain/0/backend/vif/2/0/state token=2/3: 
deregister slotnum=2
libxl: debug: libxl_device.c:1090:device_backend_callback: Domain 
2:calling device_backend_cleanup
libxl: debug: libxl_event.c:864:libxl__ev_xswatch_deregister: watch 
w=0x55c97f290b80: deregister unregistered
libxl: debug: libxl_device.c:1191:device_hotplug: Domain 2:calling 
hotplug script: /etc/xen/scripts/vif-route.hvm online
libxl: debug: libxl_device.c:1192:device_hotplug: Domain 2:extra args:
libxl: debug: libxl_device.c:1198:device_hotplug: Domain 2: type_if=vif
libxl: debug: libxl_device.c:1200:device_hotplug: Domain 2:env:
libxl: debug: libxl_device.c:1207:device_hotplug: Domain 2: script: 
/etc/xen/scripts/vif-route.hvm
libxl: debug: libxl_device.c:1207:device_hotplug: Domain 2: XENBUS_TYPE: vif
libxl: debug: libxl_device.c:1207:device_hotplug: Domain 2: XENBUS_PATH: 
backend/vif/2/0
libxl: debug: libxl_device.c:1207:device_hotplug: Domain 2: 
XENBUS_BASE_PATH: backend
libxl: debug: libxl_device.c:1207:device_hotplug: Domain 2: netdev: eth0
libxl: debug: libxl_device.c:1207:device_hotplug: Domain 2: INTERFACE: 
vif2.0-emu
libxl: debug: libxl_device.c:1207:device_hotplug: Domain 2:     vif: vif2.0
libxl: debug: libxl_aoutils.c:593:libxl__async_exec_start: forking to 
execute: /etc/xen/scripts/vif-route.hvm online
libxl: debug: libxl_event.c:864:libxl__ev_xswatch_deregister: watch 
w=0x55c97f290c80: deregister unregistered
libxl: debug: libxl_device.c:1191:device_hotplug: Domain 2:calling 
hotplug script: /etc/xen/scripts/vif-route.hvm add
libxl: debug: libxl_device.c:1192:device_hotplug: Domain 2:extra args:
libxl: debug: libxl_device.c:1198:device_hotplug: Domain 2: type_if=tap
libxl: debug: libxl_device.c:1200:device_hotplug: Domain 2:env:
libxl: debug: libxl_device.c:1207:device_hotplug: Domain 2: script: 
/etc/xen/scripts/vif-route.hvm
libxl: debug: libxl_device.c:1207:device_hotplug: Domain 2: XENBUS_TYPE: vif
libxl: debug: libxl_device.c:1207:device_hotplug: Domain 2: XENBUS_PATH: 
backend/vif/2/0
libxl: debug: libxl_device.c:1207:device_hotplug: Domain 2: 
XENBUS_BASE_PATH: backend
libxl: debug: libxl_device.c:1207:device_hotplug: Domain 2: netdev: eth0
libxl: debug: libxl_device.c:1207:device_hotplug: Domain 2: INTERFACE: 
vif2.0-emu
libxl: debug: libxl_device.c:1207:device_hotplug: Domain 2:     vif: vif2.0
libxl: debug: libxl_aoutils.c:593:libxl__async_exec_start: forking to 
execute: /etc/xen/scripts/vif-route.hvm add
libxl: debug: libxl_event.c:864:libxl__ev_xswatch_deregister: watch 
w=0x55c97f290c80: deregister unregistered
libxl: debug: libxl_linux.c:225:libxl__get_hotplug_script_info: Domain 
2:num_exec 2, not running hotplug scripts
libxl: debug: libxl_device.c:1176:device_hotplug: Domain 2:No hotplug 
script to execute
libxl: debug: libxl_event.c:864:libxl__ev_xswatch_deregister: watch 
w=0x55c97f290c80: deregister unregistered
libxl: debug: libxl_qmp.c:1883:libxl__ev_qmp_send: Domain 2: ev 
0x55c97f293708, cmd 'device_add'
libxl: debug: libxl_qmp.c:1323:qmp_ev_lock_aquired: Domain 2:Connecting 
to /var/run/xen/qmp-libxl-2
libxl: error: libxl_pci.c:1477:libxl__device_pci_reset: The kernel 
doesn't support reset from sysfs for PCI device 0000:00:14.0
libxl: debug: libxl_qmp.c:1883:libxl__ev_qmp_send: Domain 2: ev 
0x55c97f2941b8, cmd 'device_add'
libxl: debug: libxl_qmp.c:1883:libxl__ev_qmp_send: Domain 2: ev 
0x55c97f294d18, cmd 'device_add'
libxl: debug: libxl_qmp.c:1698:qmp_ev_handle_message: Domain 2:QEMU 
version: 5.2.0
libxl: debug: libxl_qmp.c:1883:libxl__ev_qmp_send: Domain 2: ev 
0x55c97f293708, cmd 'query-pci'
libxl: debug: libxl_qmp.c:1919:libxl__ev_qmp_dispose: Domain 2: ev 
0x55c97f293708
libxl: debug: libxl_qmp.c:1323:qmp_ev_lock_aquired: Domain 2:Connecting 
to /var/run/xen/qmp-libxl-2
libxl: debug: libxl_qmp.c:1698:qmp_ev_handle_message: Domain 2:QEMU 
version: 5.2.0
libxl: debug: libxl_qmp.c:1883:libxl__ev_qmp_send: Domain 2: ev 
0x55c97f2941b8, cmd 'query-pci'
libxl: debug: libxl_qmp.c:1919:libxl__ev_qmp_dispose: Domain 2: ev 
0x55c97f2941b8
libxl: debug: libxl_qmp.c:1323:qmp_ev_lock_aquired: Domain 2:Connecting 
to /var/run/xen/qmp-libxl-2
libxl: debug: libxl_qmp.c:1698:qmp_ev_handle_message: Domain 2:QEMU 
version: 5.2.0
libxl: debug: libxl_qmp.c:1883:libxl__ev_qmp_send: Domain 2: ev 
0x55c97f294d18, cmd 'query-pci'
libxl: debug: libxl_qmp.c:1919:libxl__ev_qmp_dispose: Domain 2: ev 
0x55c97f294d18
libxl: debug: libxl_pci.c:94:libxl__create_pci_backend: Domain 
2:Creating pci backend
libxl: debug: libxl_event.c:813:libxl__ev_xswatch_register: watch 
w=0x55c97f285af8 wpath=/local/domain/2/console/tty token=2/4: register 
slotnum=2
libxl: debug: libxl_event.c:750:watchfd_callback: watch w=0x55c97f285af8 
wpath=/local/domain/2/console/tty token=2/4: event 
epath=/local/domain/2/console/tty
libxl: debug: libxl_event.c:2402:libxl__ao_progress_report: ao 
0x55c97f27e180: progress report: ignored
libxl: debug: libxl_event.c:850:libxl__ev_xswatch_deregister: watch 
w=0x55c97f285af8 wpath=/local/domain/2/console/tty token=2/4: deregister 
slotnum=2
libxl: debug: libxl_event.c:864:libxl__ev_xswatch_deregister: watch 
w=0x55c97f285af8: deregister unregistered
libxl: debug: libxl_event.c:2066:libxl__ao_complete: ao 0x55c97f27e180: 
complete, rc=0
libxl: debug: libxl_event.c:2035:libxl__ao__destroy: ao 0x55c97f27e180: 
destroy
libxl: debug: libxl_domain.c:703:libxl_domain_unpause: Domain 2:ao 
0x55c97f2b0210: create: how=(nil) callback=(nil) poller=0x55c97f27e220
libxl: debug: libxl_qmp.c:1883:libxl__ev_qmp_send: Domain 2: ev 
0x55c97f2947c8, cmd 'cont'
libxl: debug: libxl_qmp.c:1323:qmp_ev_lock_aquired: Domain 2:Connecting 
to /var/run/xen/qmp-libxl-2
libxl: debug: libxl_domain.c:711:libxl_domain_unpause: Domain 2:ao 
0x55c97f2b0210: inprogress: poller=0x55c97f27e220, flags=i
libxl: debug: libxl_qmp.c:1698:qmp_ev_handle_message: Domain 2:QEMU 
version: 5.2.0
libxl: debug: libxl_qmp.c:1919:libxl__ev_qmp_dispose: Domain 2: ev 
0x55c97f2947c8
libxl: debug: libxl_event.c:864:libxl__ev_xswatch_deregister: watch 
w=0x55c97f294938: deregister unregistered
libxl: debug: libxl_event.c:2066:libxl__ao_complete: ao 0x55c97f2b0210: 
complete, rc=0
libxl: debug: libxl_event.c:2035:libxl__ao__destroy: ao 0x55c97f2b0210: 
destroy
xencall:buffer: debug: total allocations:476 total releases:476
xencall:buffer: debug: current allocations:0 maximum allocations:3
xencall:buffer: debug: cache current size:3
xencall:buffer: debug: cache hits:455 misses:3 toobig:18
xencall:buffer: debug: total allocations:0 total releases:0
xencall:buffer: debug: current allocations:0 maximum allocations:0
xencall:buffer: debug: cache current size:0
xencall:buffer: debug: cache hits:0 misses:0 toobig:0

Regards,

Chuck

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