guest os could not access the vf assigned ，and print this error message .
PCI: device 0000:00:06.0 has unknown header type 7f, ignoring.
PCI: device 0000:00:07.0 has unknown header type 7f, ignoring.
PCI: device 0000:00:08.0 has unknown header type 7f, ignoring.
the reason is the config file /sys/bus/pci/devices/xx/config of pci
device could not access correctly after guestos start,
the content qemu-kvm read from /sys/bus/pci/devices/xx/config is all FF.
before start guestos , lspci can display current information of sr-iov
devices. include pf and vf.
and the content read from /sys/bus/pci/devices/xx/config is correctly.
but after start guestos , lspci can not display information of sr-iov.
the content read from /sys/bus/pci/devices/xx/config is all FF.
02:00.0 Ethernet controller: Intel Corporation 82599EB 10-Gigabit
Network Connection (rev ff) (prog-if ff) !!! Unknown header type 7f
Kernel driver in use: ixgbe Kernel modules: ixgbe
02:00.1 Ethernet controller: Intel Corporation 82599EB 10-Gigabit
Network Connection (rev ff) (prog-if ff) !!! Unknown header type 7f
Kernel driver in use: ixgbe Kernel modules: ixgbe
02:10.0 Ethernet controller: Intel Corporation 82559 Ethernet
Controller Virtual Function (rev ff) (prog-if ff) !!! Unknown header
type 7f
02:10.1 Ethernet controller: Intel Corporation 82559 Ethernet
Controller Virtual Function (rev ff) (prog-if ff) !!! Unknown header
type 7f
02:10.2 Ethernet controller: Intel Corporation 82559 Ethernet
Controller Virtual Function (rev ff) (prog-if ff) !!! Unknown header
type 7f
02:10.3 Ethernet controller: Intel Corporation 82559 Ethernet
Controller Virtual Function (rev ff) (prog-if ff) !!! Unknown header
type 7f
02:10.4 Ethernet controller: Intel Corporation 82559 Ethernet
Controller Virtual Function (rev ff) (prog-if ff) !!! Unknown header
type 7f
the xml config of guest os below:
<domain type='kvm'>
<name>f19s02</name>
<uuid>211cf0f8-3ed6-42bf-0745-a8d5ee021902</uuid>
<memory>6815744</memory>
<currentMemory>6815744</currentMemory>
<vcpu>2</vcpu>
<os>
<type arch='i686' machine='pc-0.12'>hvm</type>
<boot dev='network'/>
</os>
<features>
<acpi/>
<apic/>
<pae/>
</features>
<clock offset='utc'/>
<on_poweroff>destroy</on_poweroff>
<on_reboot>restart</on_reboot>
<on_crash>destroy</on_crash>
<devices>
<emulator>/usr/bin/qemu-kvm</emulator>
<controller type='ide' index='0'/>
<interface type='bridge'>
<mac address='00:e0:fc:00:19:02'/>
<source bridge='eth0'/>
<target dev='vnet0'/>
<model type='e1000'/>
</interface>
<interface type='bridge'>
<mac address='00:e0:fc:01:19:02'/>
<source bridge='eth0'/>
<target dev='vnet1'/>
<model type='e1000'/>
</interface>
<serial type='pty'>
<target port='0'/>
</serial>
<console type='pty'>
<target port='0'/>
</console>
<input type='mouse' bus='ps2'/>
<graphics type='vnc' port='-1' autoport='yes' listen='*' keymap='en-us'/>
<video>
<model type='cirrus' vram='9216' heads='1'/>
</video>
<hostdev mode='subsystem' type='pci' managed='no'>
<source>
<address domain='0x0000' bus='0x02' slot='0x10' function='0x1'/>
</source>
</hostdev>
<hostdev mode='subsystem' type='pci' managed='no'>
<source>
<address domain='0x0000' bus='0x02' slot='0x10' function='0x3'/>
</source>
</hostdev>
<hostdev mode='subsystem' type='pci' managed='no'>
<source>
<address domain='0x0000' bus='0x02' slot='0x10' function='0x0'/>
</source>
</hostdev>
</devices>
</domain>
why the content read from /sys/bus/pci/devices/xx/config is all FF
after guest os start?
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