Giacomo Travaglini has uploaded this change for review. (
https://gem5-review.googlesource.com/c/public/gem5/+/44006 )
Change subject: configs: Add --kvm-userspace-gic to fs_bigLITTLE.py
......................................................................
configs: Add --kvm-userspace-gic to fs_bigLITTLE.py
This will allow a user to select gem5 simulation of the GIC via
command line; Necessary option when the simulated GIC != than the
host GIC
Signed-off-by: Giacomo Travaglini <giacomo.travagl...@arm.com>
Change-Id: I30e151b774ddfa7f4e91054a375254e15007af3f
---
M configs/example/arm/fs_bigLITTLE.py
1 file changed, 14 insertions(+), 2 deletions(-)
diff --git a/configs/example/arm/fs_bigLITTLE.py
b/configs/example/arm/fs_bigLITTLE.py
index c7edb29..c590fe5 100644
--- a/configs/example/arm/fs_bigLITTLE.py
+++ b/configs/example/arm/fs_bigLITTLE.py
@@ -197,6 +197,9 @@
help="Custom Linux kernel command")
parser.add_argument("--bootloader", action="append",
help="executable file that runs before the
--kernel")
+ parser.add_argument("--kvm-userspace-gic", action="store_true",
+ default=False,
+ help="Use the gem5 GIC in a KVM simulation")
parser.add_argument("-P", "--param", action="append", default=[],
help="Set a SimObject parameter relative to the root node. "
"An extended Python multi range slicing syntax can be used "
@@ -281,7 +284,7 @@
# Create a KVM VM and do KVM-specific configuration
if issubclass(big_model, KvmCluster):
- _build_kvm(system, all_cpus)
+ _build_kvm(options, system, all_cpus)
# Linux device tree
if options.dtb is not None:
@@ -305,9 +308,18 @@
return root
-def _build_kvm(system, cpus):
+def _build_kvm(options, system, cpus):
system.kvm_vm = KvmVM()
+ if options.kvm_userspace_gic:
+ # We will use the simulated GIC.
+ # In order to make it work we need to remove the system interface
+ # of the generic timer from the DTB and we need to inform the
+ # MuxingKvmGic class to use the gem5 GIC instead of relying on the
+ # host interrupt controller
+ GenericTimer.generateDeviceTree = SimObject.generateDeviceTree
+ system.realview.gic.simulate_gic = True
+
# Assign KVM CPUs to their own event queues / threads. This
# has to be done after creating caches and other child objects
# since these mustn't inherit the CPU event queue.
--
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Gerrit-Project: public/gem5
Gerrit-Branch: develop
Gerrit-Change-Id: I30e151b774ddfa7f4e91054a375254e15007af3f
Gerrit-Change-Number: 44006
Gerrit-PatchSet: 1
Gerrit-Owner: Giacomo Travaglini <giacomo.travagl...@arm.com>
Gerrit-MessageType: newchange
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