Dear rshankar,

As I know, the NIC in gem5 is worked only with Full System (FS) mode
in order to load the correct drivers etc. You can add the following in
order to add the NIC in FS mode:

https://github.com/H2020-COSSIM/cgem5/blob/main/src/dev/x86/SouthBridge.py
(see the lines with #COSSIM)
https://github.com/H2020-COSSIM/cgem5/blob/main/configs/common/FSConfig.py
(lines 636, 674-676)

Build the gem5.

You need download the vmlinux-5.4.49 kernel from here:
https://github.com/gem5/gem5-resources/tree/stable/src/linux-kernel

You need download the x86-ubuntu.img image from here:
http://dist.gem5.org/dist/v21-2/images/x86/ubuntu-18-04/x86-ubuntu.img.gz

Mount the x86-ubuntu.img and add the gem5_init.sh in /root using:

sudo mount -o loop,offset=1048576 x86-ubuntu.img /mnt
cd /mnt
sudo mount --bind /proc /mnt/proc
sudo mount --bind /dev /mnt/dev
sudo chroot .
cd root
nano gem5_init.sh #Add the following script:

#!/bin/bash

Copyright (c) 2021 The University of Texas at Austin.

SPDX-License-Identifier: BSD 3-Clause

echo "Starting gem5 init... reading run script file."
if ! m5 readfile > /tmp/script; then
echo "Failed to run m5 readfile, exiting!!"
rm -f /tmp/script
if ! m5 exit; then
# Useful for booting the disk image in (e.g.,) qemu for debugging
echo "m5 exit failed, dropping to shell."
/bin/sh
fi
else
echo "Running m5 script from /tmp/script !!"
chmod 755 /tmp/script
/tmp/script
echo "Done running script, exiting."
rm -f /tmp/script
/bin/sh
#m5 exit
fi

exit

now we are back to the host system

cd
sudo umount /mnt/proc
sudo umount /mnt/dev
sudo umount /mnt

Now, you may use this cmd to start the FS execution:

/home/cossim/COSSIM/cgem5/build/X86/gem5.fast --listener-mode=on
/home/cossim/COSSIM/cgem5/configs/example/fs.py
--kernel=vmlinux-5.4.49 --disk-image=x86-ubuntu.img --dual

The 1st terminal is in 3456 port (telnet 127.0.0.1 3456)
The 2nd terminal is in 3457 port (telnet 127.0.0.1 3457)

After boot, you need add the localhost and IP in both terminals (eg.
ifconfig lo 127.0.0.1 & ifconfig eth0 10.0.1.x), where x 2 and 3). You
can use "ping -c 1 10.0.1.x" to check the functionality.

If you use the above steps in your work, refer to the following COSSIM
paper, please: https://dl.acm.org/doi/10.1145/3378934

If someone has configured the NIC with SE mode, please give us details! :)

Best regards,
Nikolaos Tampouratzis

Quoting rshankar2@austin.rr.com:

Thanks very much Nikolaos for the detailed step-by-step response. This is
highly appreciated.  I'll try and get back

Raghu

-----Original Message-----
From: Νικόλαος Ταμπουρατζής ntampouratzis@ece.auth.gr
Sent: Wednesday, May 11, 2022 12:10 PM
To: The gem5 Users mailing list gem5-users@gem5.org
Subject: [gem5-users] Re: IGbE / Intel 8254x - NIC support on Gem5?

Dear rshankar,

As I know, the NIC in gem5 is worked only with Full System (FS) mode in
order to load the correct drivers etc. You can add the following in order to
add the NIC in FS mode:

https://github.com/H2020-COSSIM/cgem5/blob/main/src/dev/x86/SouthBridge.py
(see the lines with #COSSIM)
https://github.com/H2020-COSSIM/cgem5/blob/main/configs/common/FSConfig.py
(lines 636, 674-676)

Build the gem5.

You need download the vmlinux-5.4.49 kernel from here:
https://github.com/gem5/gem5-resources/tree/stable/src/linux-kernel

You need download the x86-ubuntu.img image from here:
http://dist.gem5.org/dist/v21-2/images/x86/ubuntu-18-04/x86-ubuntu.img.gz

Mount the x86-ubuntu.img and add the gem5_init.sh in /root using:

sudo mount -o loop,offset=1048576 x86-ubuntu.img /mnt cd /mnt sudo mount
--bind /proc /mnt/proc sudo mount --bind /dev /mnt/dev sudo chroot .
cd root
nano gem5_init.sh #Add the following script:

#!/bin/bash

Copyright (c) 2021 The University of Texas at Austin.

SPDX-License-Identifier: BSD 3-Clause

echo "Starting gem5 init... reading run script file."
if ! m5 readfile > /tmp/script; then
echo "Failed to run m5 readfile, exiting!!"
rm -f /tmp/script
if ! m5 exit; then
# Useful for booting the disk image in (e.g.,) qemu for debugging
echo "m5 exit failed, dropping to shell."
/bin/sh
fi
else
echo "Running m5 script from /tmp/script !!"
chmod 755 /tmp/script
/tmp/script
echo "Done running script, exiting."
rm -f /tmp/script
/bin/sh
#m5 exit
fi

exit

now we are back to the host system

cd
sudo umount /mnt/proc
sudo umount /mnt/dev
sudo umount /mnt

Now, you may use this cmd to start the FS execution:

/home/cossim/COSSIM/cgem5/build/X86/gem5.fast --listener-mode=on
/home/cossim/COSSIM/cgem5/configs/example/fs.py
--kernel=vmlinux-5.4.49 --disk-image=x86-ubuntu.img --dual

The 1st terminal is in 3456 port (telnet 127.0.0.1 3456) The 2nd terminal is
in 3457 port (telnet 127.0.0.1 3457)

After boot, you need add the localhost and IP in both terminals (eg.
ifconfig lo 127.0.0.1 & ifconfig eth0 10.0.1.x), where x 2 and 3). You can
use "ping -c 1 10.0.1.x" to check the functionality.

If you use the above steps in your work, refer to the following COSSIM
paper, please: https://dl.acm.org/doi/10.1145/3378934

If someone has configured the NIC with SE mode, please give us details! :)

Best regards,
Nikolaos Tampouratzis

Quoting rshankar2@austin.rr.com:

gem5-users mailing list -- gem5-users@gem5.org To unsubscribe send an email
to gem5-users-leave@gem5.org

Nikolaos.
A related question - Are the 2 code streams of cgem5 & gem5 - kept consistent to each other?  So users can benefit from updates on either stream (I'm not sure how that works today). If one switches to cgem5 stream do we lose improvements happening on gem5 stream?

Also, thanks for your research work, community share of COSSIM gem5, and paper below (which I had a copy from before 😊)

Raghu

-----Original Message-----
From: rshankar2@austin.rr.com rshankar2@austin.rr.com
Sent: Wednesday, May 11, 2022 12:58 PM
To: 'The gem5 Users mailing list' gem5-users@gem5.org
Subject: [gem5-users] Re: IGbE / Intel 8254x - NIC support on Gem5?

Thanks very much Nikolaos for the detailed step-by-step response. This is highly appreciated.  I'll try and get back

Raghu

-----Original Message-----
From: Νικόλαος Ταμπουρατζής ntampouratzis@ece.auth.gr
Sent: Wednesday, May 11, 2022 12:10 PM
To: The gem5 Users mailing list gem5-users@gem5.org
Subject: [gem5-users] Re: IGbE / Intel 8254x - NIC support on Gem5?

Dear rshankar,

As I know, the NIC in gem5 is worked only with Full System (FS) mode in order to load the correct drivers etc. You can add the following in order to add the NIC in FS mode:

https://github.com/H2020-COSSIM/cgem5/blob/main/src/dev/x86/SouthBridge.py
(see the lines with #COSSIM)
https://github.com/H2020-COSSIM/cgem5/blob/main/configs/common/FSConfig.py
(lines 636, 674-676)

Build the gem5.

You need download the vmlinux-5.4.49 kernel from here:
https://github.com/gem5/gem5-resources/tree/stable/src/linux-kernel

You need download the x86-ubuntu.img image from here:
http://dist.gem5.org/dist/v21-2/images/x86/ubuntu-18-04/x86-ubuntu.img.gz

Mount the x86-ubuntu.img and add the gem5_init.sh in /root using:

sudo mount -o loop,offset=1048576 x86-ubuntu.img /mnt cd /mnt sudo mount --bind /proc /mnt/proc sudo mount --bind /dev /mnt/dev sudo chroot .
cd root
nano gem5_init.sh #Add the following script:

#!/bin/bash

Copyright (c) 2021 The University of Texas at Austin.

SPDX-License-Identifier: BSD 3-Clause

echo "Starting gem5 init... reading run script file."
if ! m5 readfile > /tmp/script; then
echo "Failed to run m5 readfile, exiting!!"
rm -f /tmp/script
if ! m5 exit; then
# Useful for booting the disk image in (e.g.,) qemu for debugging
echo "m5 exit failed, dropping to shell."
/bin/sh
fi
else
echo "Running m5 script from /tmp/script !!"
chmod 755 /tmp/script
/tmp/script
echo "Done running script, exiting."
rm -f /tmp/script
/bin/sh
#m5 exit
fi

exit

now we are back to the host system

cd
sudo umount /mnt/proc
sudo umount /mnt/dev
sudo umount /mnt

Now, you may use this cmd to start the FS execution:

/home/cossim/COSSIM/cgem5/build/X86/gem5.fast --listener-mode=on /home/cossim/COSSIM/cgem5/configs/example/fs.py
--kernel=vmlinux-5.4.49 --disk-image=x86-ubuntu.img --dual

The 1st terminal is in 3456 port (telnet 127.0.0.1 3456) The 2nd terminal is in 3457 port (telnet 127.0.0.1 3457)

After boot, you need add the localhost and IP in both terminals (eg.
ifconfig lo 127.0.0.1 & ifconfig eth0 10.0.1.x), where x 2 and 3). You can use "ping -c 1 10.0.1.x" to check the functionality.

If you use the above steps in your work, refer to the following COSSIM paper, please: https://dl.acm.org/doi/10.1145/3378934

If someone has configured the NIC with SE mode, please give us details! :)

Best regards,
Nikolaos Tampouratzis

Quoting rshankar2@austin.rr.com:

gem5-users mailing list -- gem5-users@gem5.org To unsubscribe send an email to gem5-users-leave@gem5.org _______________________________________________
gem5-users mailing list -- gem5-users@gem5.org To unsubscribe send an email to gem5-users-leave@gem5.org

Dear Raghu,

The steps which I sent you is for dual gem5 (not for cgem5). In this scenario, two gem5s is connected through Etherlink (virtual dummy link) without switches etc. Also in this scenario both two gem5s is working in one thread (for this reason does not need synchronization). So you do not need the COSSIM and cgem5. You only need download the latest official gem5 and patch it using my previous steps to add the NIC.

COSSIM uses OMNET++ and it is much more complex as you can see in the paper.

Best regards,
Nikolaos Tampouratzis

We have not synchronize the COSSIM code in official gem5 release because it requires HLA libriries.

Nikolaos & Gem5 community,

Thanks for the detailed instructions to run Full system with NICs with
#COSSIM edits. My project partner and I tried all the way to the end.
Both are experiencing /dev/mem problem as below. We've tried different ways
to change to root owner and chmod, but with no luck

Any help on how to proceed?

Thanks in advance

$ sudo chroot .
Starting gem5 init... reading run script file.
Can't open /dev/mem: Operation not permitted
Failed to run m5 readfile, exiting!
Can't open /dev/mem: Operation not permitted
m5 exit failed, dropping to shell.

m5 readfile

Can't open /dev/mem: Operation not permitted

whoami

root

ls -l /dev/mem

crw-r----- 1 root kmem 1, 1 Jun  8 10:38 /dev/mem

chown root:kmem /dev/mem

m5 readfile

Can't open /dev/mem: Operation not permitted

chmod 660 /dev/mem

m5 readfile

Can't open /dev/mem: Operation not permitted

chown root:kmem /dev/mem

m5 readfile

Can't open /dev/mem: Operation not permitted

chmod 666 /dev/mem

ls -l /dev/mem

crw-rw-rw- 1 root kmem 1, 1 Jun  8 10:38 /dev/mem

m5 readfile

Can't open /dev/mem: Operation not permitted

-----Original Message-----
From: Νικόλαος Ταμπουρατζής ntampouratzis@ece.auth.gr
Sent: Wednesday, May 11, 2022 12:10 PM
To: The gem5 Users mailing list gem5-users@gem5.org
Subject: [gem5-users] Re: IGbE / Intel 8254x - NIC support on Gem5?

Dear rshankar,

As I know, the NIC in gem5 is worked only with Full System (FS) mode in
order to load the correct drivers etc. You can add the following in order to
add the NIC in FS mode:

https://github.com/H2020-COSSIM/cgem5/blob/main/src/dev/x86/SouthBridge.py
(see the lines with #COSSIM)
https://github.com/H2020-COSSIM/cgem5/blob/main/configs/common/FSConfig.py
(lines 636, 674-676)

Build the gem5.

You need download the vmlinux-5.4.49 kernel from here:
https://github.com/gem5/gem5-resources/tree/stable/src/linux-kernel

You need download the x86-ubuntu.img image from here:
http://dist.gem5.org/dist/v21-2/images/x86/ubuntu-18-04/x86-ubuntu.img.gz

Mount the x86-ubuntu.img and add the gem5_init.sh in /root using:

sudo mount -o loop,offset=1048576 x86-ubuntu.img /mnt cd /mnt sudo mount
--bind /proc /mnt/proc sudo mount --bind /dev /mnt/dev sudo chroot .
cd root
nano gem5_init.sh #Add the following script:

#!/bin/bash

Copyright (c) 2021 The University of Texas at Austin.

SPDX-License-Identifier: BSD 3-Clause

echo "Starting gem5 init... reading run script file."
if ! m5 readfile > /tmp/script; then
echo "Failed to run m5 readfile, exiting!!"
rm -f /tmp/script
if ! m5 exit; then
# Useful for booting the disk image in (e.g.,) qemu for debugging
echo "m5 exit failed, dropping to shell."
/bin/sh
fi
else
echo "Running m5 script from /tmp/script !!"
chmod 755 /tmp/script
/tmp/script
echo "Done running script, exiting."
rm -f /tmp/script
/bin/sh
#m5 exit
fi

exit

now we are back to the host system

cd
sudo umount /mnt/proc
sudo umount /mnt/dev
sudo umount /mnt

Now, you may use this cmd to start the FS execution:

/home/cossim/COSSIM/cgem5/build/X86/gem5.fast --listener-mode=on
/home/cossim/COSSIM/cgem5/configs/example/fs.py
--kernel=vmlinux-5.4.49 --disk-image=x86-ubuntu.img --dual

The 1st terminal is in 3456 port (telnet 127.0.0.1 3456) The 2nd terminal is
in 3457 port (telnet 127.0.0.1 3457)

After boot, you need add the localhost and IP in both terminals (eg.
ifconfig lo 127.0.0.1 & ifconfig eth0 10.0.1.x), where x 2 and 3). You can
use "ping -c 1 10.0.1.x" to check the functionality.

If you use the above steps in your work, refer to the following COSSIM
paper, please: https://dl.acm.org/doi/10.1145/3378934

If someone has configured the NIC with SE mode, please give us details! :)

Best regards,
Nikolaos Tampouratzis

Quoting rshankar2@austin.rr.com mailto:rshankar2@austin.rr.com :

gem5-users mailing list -- gem5-users@gem5.org mailto:gem5-users@gem5.org
To unsubscribe send an email to gem5-users-leave@gem5.org
mailto:gem5-users-leave@gem5.org

Dear rshankar,

Do you try to chroot using qemu or gem5? In addition, the m5
pseudo-instructions (e.g. m5 readfile) work only inside the gem5
simulation.

I write you how to mount the x86 image through qemu in order to
emulate it first, make any changes (using chroot .), and then simulate
it through gem5 (using m5 pseudo-instructions).

Best regards,
Nikos

Quoting rshankar2@austin.rr.com: