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GPU SRIOV with a FirePro S7150 graphics card

In order to archieve a GPU SRIOV with a FirePro S7150 card, we'll need to have a kernel 4.4 of an Ubuntu 16.04 server. During the installation process, we'll need to make sure that the virtualization option is checked on.

TODO: - Check if it can be made with other distros or kernels

1- Modify the BIOS

The first step is going to be modify the BIOS. We'll need to reset it to defaults, change the boot method to legacy, activate all the parameters related with virtualization and, finally, enable SRIOV. If the motherboard doesn't have this last option, the whole thing is not going to work. We'll have to change the main graphics card to the onboard one, since the FirePro S7150 doesn't have a video output. (IntelRCSetup > Miscellanious Configuration > Active Video [Onboard Device])

2- Kernel compilation

In order to use the graphics cards and all its cores, we'll have to recompile the Linux Kernel, modifying some values and applying some paches.

2.1- Activate the deb-src apt repositories to be able to download the Kernel source

vim /etc/apt/sources.list
----
# See http://help.ubuntu.com/community/UpgradeNotes for how to upgrade to
# newer versions of the distribution.
deb http://es.archive.ubuntu.com/ubuntu/ xenial main restricted
deb-src http://es.archive.ubuntu.com/ubuntu/ xenial main restricted

## Major bug fix updates produced after the final release of the
## distribution.
deb http://es.archive.ubuntu.com/ubuntu/ xenial-updates main restricted
deb-src http://es.archive.ubuntu.com/ubuntu/ xenial-updates main restricted

## N.B. software from this repository is ENTIRELY UNSUPPORTED by the Ubuntu
## team. Also, please note that software in universe WILL NOT receive any
## review or updates from the Ubuntu security team.
deb http://es.archive.ubuntu.com/ubuntu/ xenial universe
deb-src http://es.archive.ubuntu.com/ubuntu/ xenial universe
deb http://es.archive.ubuntu.com/ubuntu/ xenial-updates universe
deb-src http://es.archive.ubuntu.com/ubuntu/ xenial-updates universe

## N.B. software from this repository is ENTIRELY UNSUPPORTED by the Ubuntu 
## team, and may not be under a free licence. Please satisfy yourself as to 
## your rights to use the software. Also, please note that software in 
## multiverse WILL NOT receive any review or updates from the Ubuntu
## security team.
deb http://es.archive.ubuntu.com/ubuntu/ xenial multiverse
deb-src http://es.archive.ubuntu.com/ubuntu/ xenial multiverse
deb http://es.archive.ubuntu.com/ubuntu/ xenial-updates multiverse
deb-src http://es.archive.ubuntu.com/ubuntu/ xenial-updates multiverse

## N.B. software from this repository may not have been tested as
## extensively as that contained in the main release, although it includes
## newer versions of some applications which may provide useful features.
## Also, please note that software in backports WILL NOT receive any review
## or updates from the Ubuntu security team.
deb http://es.archive.ubuntu.com/ubuntu/ xenial-backports main restricted universe multiverse
deb-src http://es.archive.ubuntu.com/ubuntu/ xenial-backports main restricted universe multiverse

## Uncomment the following two lines to add software from Canonical's
## 'partner' repository.
## This software is not part of Ubuntu, but is offered by Canonical and the
## respective vendors as a service to Ubuntu users.
# deb http://archive.canonical.com/ubuntu xenial partner
# deb-src http://archive.canonical.com/ubuntu xenial partner

deb http://security.ubuntu.com/ubuntu xenial-security main restricted
deb-src http://security.ubuntu.com/ubuntu xenial-security main restricted
deb http://security.ubuntu.com/ubuntu xenial-security universe
deb-src http://security.ubuntu.com/ubuntu xenial-security universe
deb http://security.ubuntu.com/ubuntu xenial-security multiverse
deb-src http://security.ubuntu.com/ubuntu xenial-security multiverse
----
apt update && apt upgrade -y
reboot # !!!! THIS REBOOT IS NEEDED !!!!

2.2- Now we need to download the required packages to be able to unpack the kernel. We need to download the repo that contains the gim module sources and the paches to apply

apt install -y dpkg-dev
apt source linux-image-$(uname -r)
git clone https://github.com/GPUOpen-LibrariesAndSDKs/MxGPU-Virtualization

2.3- Now we install all the packages required to compile the Kernel

apt build-dep linux-image-$(uname -r)
apt install libncurses5 libncurses5-dev

2.4- Kernel preparation and patch installation

cd linux-4.4.0
make oldconfig
make menuconfig
> Enable loadable module support --->
>> [ ] Module signature verification # This has to be unchecked. After that, we can save and exit
patch < ../MxGPU-Virtualization/patch/0001-Added-legacy-endpoint-type-to-sriov-for-ubuntu-4.4.0-75-generic.diff
File to patch: ./drivers/pci/iov.c # We need to specify the path of the file we want to patch
patch < ../MxGPU-Virtualization/patch/0002-add-pci-io-access-cap-for-ubuntu-4.4.0-75-generic.diff
File to patch: ./drivers/vfio/pci/vfio_pci_config.c # We need to specify the path of the file we want to patch

2.5- Kernel compilation

make -j <number of threads that the CPU has> deb-pkg LOCALVERSION=-vm-firepro

2.6- New Kernel installation

cd ..
dpkg -i *.deb

3- GRUB preparation

3.1- Add the module amdgpu to the blacklist (we'll use the gim module)

vim /etc/modprobe.d/blacklist.conf
----
...
# AMD GPU (we'll use the gim module)
blacklist amdgpu
----
update-initramfs -u

3.2- Edit the default GRUB configuration in order to enable IOMMU

vim /etc/default/grub
----
...
GRUB_CMDLINE_LINUX_DEFAULT="quiet intel_iommu=on"
...
----
update-grub

4- gim module compilation

The gim module is the module that we're going to use in order to control the graphics card.

cd MxGPU-Virtualization
./gim.sh
mkdir /lib/modules/<firepro version>/misc
mv /lib/modules/<firepro version/GIM /lib/modules/<firepro version>/misc/gim
depmod
nano /etc/modules # Make the module load on boot
----
...
gim
...
----

Once it's compiled, we need to execute the following:

reboot # To apply all the GRUB configuration
modprobe gim
modprobe -r gim
nano /etc/gim_config # It needs to be nano, the vi command isn't going to work
----
...
vf_num=16 # This is going to activate the 16 cores of the GPU
...
----
modprobe gim
dmesg # Finally, we need to check that the gim module has successfully been loaded, without errors
lspci -vvv # We can now see that the FirePro S7150 has all the 16 cores activated