configs: Generalize FileSystemConfig for non se.py

This patch updates the FileSystemConfig so it works with more kinds of
config scripts (e.g., the Learning gem5 scripts).

There are 4 main changes:
- Added system as a parameter to the config_filesystem function so the
function can search the system for the number of CPUs instead of relying
on options from Options.py
- Instead of calling redirect_paths everywhere config_filesystem is
used, now it is implicitly called.
- Cleaned up the Ruby scripts a bit to remove redundant calls to
config_filesystem
- Added a config_filesystem call to the Ruby Learning gem5 script
(currently the only Learning gem5 script that requires it).

In the future, I think it would be better to move the config_filesystem
call into simulate.py, probably into the instantiate function. I tried to
use the per-CPU configuration parameters instead of options from
Options.py, but that's not possible until after the SimObject params
have been finalized in instantiate.

Change-Id: Ie6501a7435cfb3ac9d2b45be3722388b34063b1e
Signed-off-by: Jason Lowe-Power <jason@lowepower.com>
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/18848
Reviewed-by: Daniel Carvalho <odanrc@yahoo.com.br>
Tested-by: kokoro <noreply+kokoro@google.com>

1 files changed, 7 insertions, 0 deletions

diff --git a/configs/learning_gem5/part3/simple_ruby.py b/configs/learning_gem5/part3/simple_ruby.py
index bcd5044a1..0c622d070 100644
--- a/configs/learning_gem5/part3/simple_ruby.py
+++ b/configs/learning_gem5/part3/simple_ruby.py
@@ -45,6 +45,10 @@ import m5
 # import all of the SimObjects
 from m5.objects import *
 
+# Needed for running C++ threads
+m5.util.addToPath('../../')
+from common.FileSystemConfig import config_filesystem
+
 # You can import ruby_caches_MI_example to use the MI_example protocol instead
 # of the MSI protocol
 from msi_caches import MyCacheSystem
@@ -95,6 +99,9 @@ for cpu in system.cpu:
     cpu.workload = process
     cpu.createThreads()
 
+# Set up the pseudo file system for the threads function above
+config_filesystem(system)
+
 # set up the root SimObject and start the simulation
 root = Root(full_system = False, system = system)
 # instantiate all of the objects we've created above