Hi all,
I downloaded the xen 3.3.0 and now
testing the pci pass-through with the NIC.
Using late binding, the pci slot
0000:08:01.0 is assigned to pciback.
But pci related xm commands are not
working.
For eg:
linux-242:/home/xen-3.3.0 # xm
pci-list-assignable-devices
Unexpected error: <type
'exceptions.OSError'>
Please report to xen-devel@xxxxxxxxxxxxxxxxxxx
Traceback (most recent call
last):
File "/usr/sbin/xm", line 10,
in <module>
main.main(sys.argv)
File
"//usr/lib64/python/xen/xm/main.py", line 2883, in
main
_, rc =
_run_cmd(cmd, cmd_name, args)
File
"//usr/lib64/python/xen/xm/main.py", line 2907, in
_run_cmd
return True,
cmd(args)
File
"//usr/lib64/python/xen/xm/main.py", line 2202, in
xm_pci_list_assignable_devices
devs_list =
check_FLR_capability(dev_list)
File
"/usr/lib64/python2.5/xen/util/pci.py", line 288, in
check_FLR_capability
coassigned_pci_list =
dev.find_coassigned_devices(True)
File
"/usr/lib64/python2.5/xen/util/pci.py", line 461, in
find_coassigned_devices
dev =
self.find_the_uppermost_pci_bridge()
File
"/usr/lib64/python2.5/xen/util/pci.py", line 424, in
find_the_uppermost_pci_bridge
dev_parent =
PciDevice(dom, b, d, f)
File
"/usr/lib64/python2.5/xen/util/pci.py", line 382, in
__init__
self.detect_dev_info()
File
"/usr/lib64/python2.5/xen/util/pci.py", line 604, in
detect_dev_info
class_dev =
self.pci_conf_read16(PCI_CLASS_DEVICE)
File
"/usr/lib64/python2.5/xen/util/pci.py", line 567, in
pci_conf_read16
fd =
os.open(self.cfg_space_path, os.O_RDONLY)
OSError: [Errno 2] No such file or
directory:
'/sys/bus/pci/devices/0000:06:00.0/config'
I checked the above python
scripts.
The function find_parent() in file
util/pci.py, tries to find the parent device from the file link
../../../devices/pci0000:06/0000:06:01.0/0000:08:01.0
When it sees pci0000:06, it tries to
read the config space of 0000:06:00.0 which doesn’t exist. This causes the above
error.
Lspci tree
is,
linux-242:/home/xen-3.3.0 # lspci
-t
-+-[0000:06]-+-01.0-[0000:08]----01.0
|
+-01.1
|
+-02.0-[0000:07]--
|
\-02.1
\-[0000:00]-+-00.0
+-01.0
+-01.1
+-06.0
+-07.0
+-08.0
+-09.0-[0000:05]----07.0
+-0b.0-[0000:04]----00.0
+-0c.0-[0000:03]----00.0
+-0d.0-[0000:02]--
+-0e.0-[0000:01]--
+-18.0
+-18.1
+-18.2
+-18.3
+-19.0
+-19.1
+-19.2
\-19.3
Thanks,
Masroor
