How to set up on Centos 7?

[jinqiao0423]

Hi, I am trying to set up KVMGT on Centos 7 system. But every time I try to boot the new kernel it will hang there forever with the message "A start job is running for dev_disk_by\x2uuid ....." I downloaded the code and have done everything according to iGVT-g_Setup_Guide.txt except adding two lines to /etc/initramfs-tools/modules because there is no such file in my Centos system. I am not sure whether it has anything to do with kernel booting. Could you help me with that? Thanks.

[asadziach]

Hi,

There is also an ISO release this time around. https://01.org/igvt-g/blogs/czhou/2016/intel-gvt-g-iso-public-release-q12016?langredirect=1 you can try that to check, If your hardware is compatible? if yes then analyze how things are configured in a working system? In my experience, not everything is covered in the documentation and having access to a working system is very useful.

Regards, Asad

[jinqiao0423]

I tried to install that .ISO by DVD but failed. The error I encountered is as follows: (initramfs) unable to find a live medium containing a live file system. Wondering whether the reason is the too old ubuntu version.

[asadziach]

Are you able to boot? You don't need to install Ubuntu, XENGT/KVMGT will work directly off the live image. You can use USB disk to boot and save a DVD.

[jinqiao0423]

No, even after selecting trying KVMGT without installing same problem occured though:(

[asadziach]

It might be the case that you need to edit Gvt-g kernel build configuration to suit your hardware. The kernel configuration file that comes with Gvt-g is the minimum required for VGT. I had to manually enable WiFi and SD Card drivers for my laptop.

[l1viathan]

On 05/09/2016 05:22 PM, invader36 wrote:

Hi, I am trying to set up KVMGT on Centos 7 system. But every time I try to boot the new kernel it will hang there forever with the message "A start job is running for dev_disk_by\x2uuid ....." I downloaded the code and have done everything according to iGVT-g_Setup_Guide.txt except adding two lines to /etc/initramfs-tools/modules because there is no such file in my Centos system. I am not sure whether it has anything to do with kernel booting. Could you help me with that? Thanks.

I would recommend you to use your centos config:

# cd linux-vgt

//use your centos config
# cp /boot/config-xxx  .config
# make oldconfig

//also select CONFIG_XENGT, CONFIG_KVMGT, CONFIG_I915_VGT
# make menuconfig

PS, if you want to contain kvm.ko and xengt.ko in a system with dracut, add a line to /etc/dracut.conf:

add_drivers+="kvm xengt"

HTH.

Thanks, Jike

[jinqiao0423]

I am sorry, but where is linux-vgt? THX

[asadziach]

This should be the directory where you cloned https://github.com/01org/Igvtg-kernel.git.

[jinqiao0423]

Thx a lot! Besides, I don't know where is CONFIG_XENGT, CONFIG_KVMGT, CONFIG_I915_VGT in menuconfig...

[jinqiao0423]

I see... I saw CONFIG_XENGT, CONFIG_KVMGT, CONFIG_I915_VGT in .config and they have already been set to y. I have already added add_drivers+="kvm xengt" to /etc/dracut.conf But still the problem exists...

[asadziach]

Does it still hang at "A start job is running for dev_disk_by\x2uuid ....."?

[jinqiao0423]

Yes, still the same information... I wonder whether I need to change codes inserted into grub.cfg. I have tried changing --class ubuntu to --class centos but still the same problem..

[asadziach]

You need to understand what are the Gvt-g specific grub options and add them to your working grub configuration. The similar is true for the kernel build configuration, you should be able to build and boot a kernel on your hardware apart from Gvt-g, then add the Gvt-g specific options in there. Hope it helps.

[jinqiao0423]

Thx! By the way, is Guest Setup steps same for Linux and Windows system?

[asadziach]

Its similar but not the same, on Linux guest you will need to copy Gvt-g kernel and modules and edit the grub file before you can set vgt=1 in Xen's .hvm file. i915.preliminary_hw_support=1 on grub line, may be required depending on guest kernel version and GPU family. For windows you need to install Intel's native GPU driver.

[jinqiao0423]

Hmm, not quite understand. So why and how can we install a Windows graphic driver on Linux system?

[asadziach]

the Intel graphics driver needs to be installed 'inside' windows guest.

[jinqiao0423]

Thx! If I want to create a Windows Guest, should I use command "qemu-img"? Besides, I don't see where to add .iso file information. I remember that when I used KVM, I will use "qemu-system-x86_64 -cdrom XXXXX.iso" to do so, but in the setup guide I fail to see similar words.

[zhoucc1985]

How to set up on CentOS 7.2? I can boot the new kernel on CentOS 7.1 when I add "add_drivers+="kvm xengt"" to /etc/dracut.conf. But after I update the system to CentOS 7.2,the new kernel doesn't boot. why? Can you help me?