Hello,
I manage to configure the GEM5 so as to run X86 FS Mode with "--dual"
option.
First of all, in GEM5’s publicly available repositories, the only
network interface card implemented, tested and
verified is the Intel 8254x based gigabit Ethernet adapter for ARM
architecture. It is provided as a PCI GEM5
network device using the e1000 Linux driver. Unfortunately, the latest
version of GEM5 does not support the real-network
device for X86-based architectures. So, we had to modify GEM5 for x86
ISA and configure it properly. In the process to
achieve this functionality on x86, proper drivers for the specific
network device were also required. Moreover, we
manage to build a more modern kernel for x86 because only 2.6.x
out-of-date kernels were available in the GEM5 repositories and add the
e1000 driver (steps 1-5).
So, you can follow these steps:
1) You have to download linux 3.2.24 kernel version (from this link:
https://www.kernel.org/pub/linux/kernel/v3.0/) and extract it:
$tar -zxvf linux-3.2.24.tar.gz
$cd linux-3.2.24
2) linux-2.6.28.4 configuration file (from this link:
http://www.m5sim.org/dist/current/x86/config-x86.tar.bz2) is used to
build the 3.2.24 Kernel typing:
$wget http://www.m5sim.org/dist/current/x86/config-x86.tar.bz2
$tar jxvf config-x86.tar.bz2
$cp configs/linux-2.6.28.4 .config
3) e1000 driver is added using make menuconfig gui
$make menuconfig
4) Compile the kernel, assuming you're building on an x86 host (-j is
the number of processors)
$make vmlinux -j 4
5) Rename the vmlinux to x86_64-vmlinux-3.2.24
6) You have to use a X86 image with root privileges so that the kernel
e1000 driver can create the network device (linux-x86.img from official
gem5 site hasn't root privileges). You can download
the x86 image with root privileges for parsec benchmarks for example
from here: http://www.cs.utexas.edu/~parsec_m5/x86root-parsec.img.bz2
After untar it, you have to rename it in "linux-bigswap2.img" because
the GEM5 scripts needs one image with this name (or you can rename the
.img file for /configs/common/FSConfig.py script file).
7) You have to change the /configs/common/FSConfig.py script file so as
to add the Intel 8254x network card in the GEM5 bus (dma, config and
pio ports) as well as connect it with the etherlink. So, you must add
the following:
i) In connectX86ClassicSystem function you must add these lines (to
connect the network device in the classic memory System):
x86_sys.ethernet.pio = x86_sys.iobus.master # x86 Implementation #
x86_sys.ethernet.config = x86_sys.iobus.master # x86 Implementation #
x86_sys.ethernet.dma = x86_sys.iobus.slave # x86 Implementation #
ii) In connectX86RubySystem function you must add these lines (to
connect the network device in the Ruby memory System):
x86_sys.ethernet.pio = x86_sys.iobus.master # x86 Implementation #
x86_sys.ethernet.config = x86_sys.iobus.master # x86 Implementation #
iii) In connectX86RubySystem function you must change this line (to
connect the network device in the Ruby memory System):
From: x86_sys._dma_ports = [x86_sys.pc.south_bridge.ide.dma]
To: x86_sys._dma_ports = [x86_sys.pc.south_bridge.ide.dma,
x86_sys.ethernet.dma] # x86 Implementation #
iv) In makeLinuxX86System function you must add this line (to
instantiate the Intel 8254x device):
self.ethernet = IGbE_e1000(pci_bus=0, pci_dev=0, pci_func=0,
InterruptLine=1, InterruptPin=1) # x86 Implementation #
v) In makeDualRoot function you must change this line (to connect the
network card with the etherlink):
From: fatal("Don't know how to connect these system together")
To: self.etherlink.int0 = Parent.testsys.ethernet.interface # x86
Implementation #
self.etherlink.int1 = Parent.drivesys.ethernet.interface # x86
Implementation #
8) Put the above "x86_64-vmlinux-3.2.24" kernel and "linux-bigswap2.img"
image inside "binaries" and "disks" folders respectively.
9) Now, you can run the GEM5 using X86 with "--dual" option typing(using
the above kernel and image):
$build/X86/gem5.opt configs/example/fs.py --kernel=x86_64-vmlinux-3.2.24
--disk-image=linux-bigswap2.img --dual
Best Regards, Nikos
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