After getting the bug mail for this bug and reading it with interest, I
happened to run into this issue today myself and did some investigation
at a seabios level.
My original hit of the issue was with RHEL, but I reproduced it with the
same card (Realtek Semiconductor Co., Ltd. RTL8111/8168/8411 PCI Express
Gigabit Ethernet Controller (PCI ID 10ec:8168)) on Ubuntu saucy.
The logs in QEMU logs list however the follow:
2013-09-18 11:09:37.307+0000: starting up
LC_ALL=C PATH=/usr/local/sbin:/usr/local/bin:/usr/bin:/usr/sbin:/sbin:/bin
QEMU_AUDIO_DRV=none /usr/bin/kvm-spice -name test -S -machine
pc-i440fx-1.5,accel=kvm,usb=off -m 1024 -realtime mlock=off -smp
1,sockets=1,cores=1,threads=1 -uuid e2481510-dcb8-8bc3-8cc5-dfd51f5d73d7
-no-user-config -nodefaults -chardev
socket,id=charmonitor,path=/var/lib/libvirt/qemu/test.monitor,server,nowait
-mon chardev=charmonitor,id=monitor,mode=control -rtc base=utc -no-shutdown
-device piix3-usb-uhci,id=usb,bus=pci.0,addr=0x1.0x2 -drive
file=/var/lib/libvirt/images/test.img,if=none,id=drive-ide0-0-0,format=raw
-device ide-hd,bus=ide.0,unit=0,drive=drive-ide0-0-0,id=ide0-0-0,bootindex=1
-drive
file=/home/njones/pfSense-LiveCD-2.1-RELEASE-amd64.iso,if=none,id=drive-ide0-1-0,readonly=on,format=raw
-device ide-cd,bus=ide.1,unit=0,drive=drive-ide0-1-0,id=ide0-1-0 -chardev
pty,id=charserial0 -device isa-serial,chardev=charserial0,id=serial0 -vnc
127.0.0.1:0 -vga cirrus -device intel-hda,id=sound0,bus=pci.0,a
ddr=0x3 -device hda-duplex,id=sound0-codec0,bus=sound0.0,cad=0 -device
pci-assign,configfd=24,host=06:00.0,id=hostdev0,bus=pci.0,addr=0x5 -device
virtio-balloon-pci,id=balloon0,bus=pci.0,addr=0x4
W: kvm binary is deprecated, please use qemu-system-x86_64 instead
char device redirected to /dev/pts/0 (label charserial0)
qemu-system-x86_64: -device
pci-assign,configfd=24,host=06:00.0,id=hostdev0,bus=pci.0,addr=0x5: pci-assign:
Cannot read from host /sys/bus/pci/devices/0000:06:00.0/rom
Device option ROM contents are probably invalid (check dmesg).
Skip option ROM probe with rombar=0, or load from file with romfile=
[after virsh destroy]
qemu: terminating on signal 15 from pid 1143
2013-09-18 11:13:54.183+0000: shutting down
At the same time, dmesg reports:
[ 412.463287] pci-stub 0000:06:00.0: claimed by stub
[ 413.177444] type=1400 audit(1379502837.636:78): apparmor="STATUS"
operation="profile_load" parent=2874 profile="unconfined"
name="libvirt-e2481510-dcb8-8bc3-8cc5-dfd51f5d73d7" pid=2875
comm="apparmor_parser"
[ 413.178897] type=1400 audit(1379502837.636:79): apparmor="DENIED"
operation="capable" parent=1 profile="/usr/sbin/libvirtd" pid=1148
comm="libvirtd" pid=1148 comm="libvirtd" capability=29 capname="audit_write"
[ 414.330150] assign device 0:6:0.0
[ 414.330585] pci-stub 0000:06:00.0: Invalid ROM contents
virsh edit'ing the VM and adding "<rom bar='off'/>" to the <hostdev>
entry to read:
<hostdev mode='subsystem' type='pci' managed='yes'>
<source>
<address domain='0x0000' bus='0x06' slot='0x00' function='0x0'/>
</source>
<rom bar='off'/>
<address type='pci' domain='0x0000' bus='0x00' slot='0x05'
function='0x0'/>
</hostdev>
caused the message to go away.
I applied the same element on the RHEL machine, which also seemed to
solve that problem, so it's possible that precise also needs this
option.
I'm suspecting what is happening is that the ROM on the network devices
is confusing seabios/coreboot but need to do some more digging first.
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https://bugs.launchpad.net/bugs/1181777
Title:
kvm: freeze a guest with a NIC PCI passthrough
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