Yesterday I tried IGD with Ubuntu 18.04 but failed:
https://www.redhat.com/archives/vfio-users/2018-August/msg00026.html
Today I use the same hardware enviroment, reinstall OS to CentOS 7.3
without GUI, upgrade kernel and qemu version:
CPU: i3-4010U, support vt-d.
[root@test ~]# lspci | grep VGA
00:02.0 VGA compatible controller: Intel Corporation Haswell-ULT Integrated
Graphics Controller (rev 09)
(Only one IGD with vga and hdmi interface)
[root@test ~]# uname -r
4.18.3-1.el7.centos.x86_64
[root@test ~]# /usr/libexec/qemu-kvm --version
QEMU emulator version 2.10.0(qemu-kvm-ev-2.10.0-21.el7_5.4.1)
Copyright (c) 2003-2017 Fabrice Bellard and the QEMU Project developers
Then I blacklist i915, forbid *fb:
[root@test ~]# cat /etc/default/grub | grep GRUB_CMDLINE_LINUX
GRUB_CMDLINE_LINUX="crashkernel=auto rhgb quiet intel_iommu=on iommu=pt
video=vesafb:off vga=normal nofb nomodeset i915.modeset=0
nouveau.modeset=0 rd.driver.blacklist=nouveau,i915 plymouth.ignore-udev"
[root@test ~]# cat /etc/modprobe.d/blacklist-i915.conf
install i915 /bin/true
After rebooted:
[root@test ~]# cat /proc/cmdline
BOOT_IMAGE=/vmlinuz-4.18.3-1.el7.centos.x86_64
root=UUID=78feccee-2f23-4ab6-b386-2b51d1664da7 ro crashkernel=auto rhgb
quiet intel_iommu=on iommu=pt video=vesafb:off vga=normal nofb nomodeset
i915.modeset=0 nouveau.modeset=0 rd.driver.blacklist=nouveau,i915
plymouth.ignore-udev
[root@test ~]# cat /proc/iomem | grep fb
01c031d1-02463fbf : Kernel data
f8000000-fbffffff : PCI MMCONFIG 0000 [bus 00-3f]
f8000000-fbffffff : Reserved
f8000000-fbffffff : pnp 00:05
[root@test ~]# lsmod | grep i915
... nothing ...
Now I begin to load vfio modules.
[root@test ~]# modprobe vfio
[root@test ~]# modprobe vfio-pci
[root@test ~]# echo "vfio-pci" >
/sys/bus/pci/devices/0000:00:02.0/driver_override
[root@test ~]# ./vfio-pci-bind.sh 0000:00:02.0
(script ref:
https://github.com/andre-richter/vfio-pci-bind/blob/master/vfio-pci-bind.sh)
[root@test ~]# lspci -v -s 00:02.0
00:02.0 VGA compatible controller: Intel Corporation Haswell-ULT Integrated
Graphics Controller (rev 09) (prog-if 00 [VGA controller])
Subsystem: Intel Corporation Haswell-ULT Integrated Graphics Controller
Flags: fast devsel, IRQ 16
Memory at a7c00000 (64-bit, non-prefetchable) [size=4M]
Memory at b0000000 (64-bit, prefetchable) [size=256M]
I/O ports at 4000 [size=64]
[virtual] Expansion ROM at 000c0000 [disabled] [size=128K]
Capabilities: [90] MSI: Enable- Count=1/1 Maskable- 64bit-
Capabilities: [d0] Power Management version 2
Capabilities: [a4] PCI Advanced Features
Kernel driver in use: vfio-pci
Kernel modules: i915
Now virsh create a win7 vm, xml file is:
<domain type='kvm' id='3' xmlns:qemu='
http://libvirt.org/schemas/domain/qemu/1.0'>
<name>windows_7_ultimate_with_sp1_x64</name>
<uuid>2fcccb90-f622-481a-8819-367c642c0a09</uuid>
<memory unit='KiB'>2097152</memory>
<currentMemory unit='KiB'>2097152</currentMemory>
<vcpu placement='static'>2</vcpu>
<resource>
<partition>/machine</partition>
</resource>
<os>
<type arch='x86_64' machine='pc-i440fx-rhel7.5.0'>hvm</type>
<boot dev='hd'/>
</os>
<features>
<acpi/>
<apic/>
<hyperv>
<relaxed state='on'/>
<vapic state='on'/>
<spinlocks state='on' retries='8191'/>
</hyperv>
</features>
<cpu mode='custom' match='exact' check='full'>
<model fallback='forbid'>Haswell-noTSX</model>
<feature policy='require' name='vme'/>
<feature policy='require' name='f16c'/>
<feature policy='require' name='rdrand'/>
<feature policy='require' name='hypervisor'/>
<feature policy='require' name='arat'/>
<feature policy='require' name='xsaveopt'/>
<feature policy='require' name='abm'/>
</cpu>
<clock offset='localtime'>
<timer name='rtc' tickpolicy='catchup'/>
<timer name='pit' tickpolicy='delay'/>
<timer name='hpet' present='no'/>
<timer name='hypervclock' present='yes'/>
</clock>
<on_poweroff>destroy</on_poweroff>
<on_reboot>restart</on_reboot>
<on_crash>destroy</on_crash>
<pm>
<suspend-to-mem enabled='no'/>
<suspend-to-disk enabled='no'/>
</pm>
<devices>
<emulator>/usr/libexec/qemu-kvm</emulator>
<disk type='file' device='disk'>
<driver name='qemu' type='qcow2'/>
<source file='/home/windows_7_ultimate_with_sp1_x64.qcow2'/>
<backingStore/>
<target dev='hda' bus='ide'/>
<alias name='ide0-0-0'/>
<address type='drive' controller='0' bus='0' target='0' unit='0'/>
</disk>
<hostdev mode='subsystem' type='pci' managed='yes'>
<driver name='vfio'/>
<source>
<address domain='0x0000' bus='0x00' slot='0x02' function='0x0'/>
</source>
<alias name='hostdev0'/>
<address type='pci' domain='0x0000' bus='0x00' slot='0x02'
function='0x0'/>
</hostdev>
</devices>
<qemu:commandline>
<qemu:arg value='-bios'/>
<qemu:arg value='/usr/share/seabios/bios.bin'/>
<qemu:arg value='-chardev'/>
<qemu:arg value='file,id=seabios,path=/tmp/bios.log'/>
<qemu:arg value='-device'/>
<qemu:arg value='isa-debugcon,iobase=0x402,chardev=seabios'/>
</qemu:commandline>
</domain>
After created, the vm is running, monitor screen turn to black then no
output.
The end of seabios log is:
...
Scan for VGA option rom
Running option rom at c000:0003
Any problem with VGA rom? In the BIOS I have already enabled CSM and the
option rom of video is set to legacy.
Ref to http://lists.gnu.org/archive/html/qemu-discuss/2018-04/msg00052.html
and https://github.com/awilliam/rom-parser
I dump the vga rom:
[root@test rom]# echo 1 > /sys/devices/pci0000:00/0000:00:02.0/rom
[root@test rom]# cat /sys/devices/pci0000:00/0000:00:02.0/rom > vbios.dump
[root@test rom]# echo 0 > /sys/devices/pci0000:00/0000:00:02.0/rom
[root@test rom]# ./rom-parser/rom-parser vbios.dump
Valid ROM signature found @0h, PCIR offset 40h
PCIR: type 0 (x86 PC-AT), vendor: 8086, device: 0406, class: 030000
PCIR: revision 3, vendor revision: 0
Last image
[root@test rom]# lspci -nns 00:02.0
00:02.0 VGA compatible controller [0300]: Intel Corporation Haswell-ULT
Integrated Graphics Controller [8086:0a16] (rev 09)
The device code in the rom is diffrent from vga device? So I modify it with
rom-fixer command:
[root@test rom]# ./rom-parser/rom-fixer ./vbios.dump
Valid ROM signature found @0h, PCIR offset 40h
PCIR: type 0 (x86 PC-AT), vendor: 8086, device: 0406, class: 030000
PCIR: revision 3, vendor revision: 0
Modify vendor ID 8086? (y/n): y
New vendor ID: 8086
Overwrite vendor ID with 8086? (y/n): y
Modify device ID 0406? (y/n): y
New device ID: 0a16
Overwrite device ID with 0a16? (y/n): y
Last image
ROM checksum is invalid, fix? (y/n): y
Then I edit the vm xml, and romfile args to hostdev:
<rom file='/path/to/vbios.dump'/>
Then destroy and create the vm again, still black screen ...
Is there any more methods to debug？
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