gem5: update to 239054f48439c18b93e1a70ff29dbcb0c4742cff

fs_bigLITTLE: no patches needed anymore, we now have the --root option.

README.adoc

@@ -12161,15 +12161,7 @@ The out of build tree is required, because otherwise Buildroot would copy the ou
 
 By default, we use `configs/example/fs.py` script.
 
-The `--gem5-script biglittle` option enables the alternative `configs/example/arm/fs_bigLITTLE.py` script instead.
-
-First apply:
-
-....
-patch -d "$(./getvar gem5_source_dir)" -p 1 < patches/manual/gem5-biglittle.patch
-....
-
-then:
+The `--gem5-script biglittle` option enables the alternative `configs/example/arm/fs_bigLITTLE.py` script instead:
 
 ....
 ./run --arch aarch64 --emulator gem5 --gem5-script biglittle

patches/manual/gem5-biglittle.patch

@@ -1,13 +0,0 @@
-diff --git a/configs/example/arm/fs_bigLITTLE.py b/configs/example/arm/fs_bigLITTLE.py
-index 7d66c03a6..d71e714fe 100644
---- a/configs/example/arm/fs_bigLITTLE.py
-+++ b/configs/example/arm/fs_bigLITTLE.py
-@@ -194,7 +194,7 @@ def build(options):
-         "norandmaps",
-         "loglevel=8",
-         "mem=%s" % default_mem_size,
--        "root=/dev/vda1",
-+        "root=/dev/vda",
-         "rw",
-         "init=%s" % options.kernel_init,
-         "vmalloc=768MB",

run

@@ -526,7 +526,10 @@ Extra options to append at the end of the emulator command line.
                             '--machine-type', self.env['machine'], LF,
                         ])
                         if self.env['baremetal'] is None:
-                            cmd.extend(['--command-line', 'earlyprintk=pl011,0x1c090000 lpj=19988480 rw loglevel=8 mem={} root=/dev/sda {}'.format(memory, kernel_cli), LF])
+                            cmd.extend([
+                                '--command-line',
+                                'earlyprintk=pl011,0x1c090000 lpj=19988480 rw loglevel=8 mem={} root=/dev/sda {}'.format(memory, kernel_cli), LF
+                            ])
                         dtb = None
                         if self.env['dtb'] is not None:
                             dtb = self.env['dtb']
@@ -574,6 +577,7 @@ Extra options to append at the end of the emulator command line.
                         '--disk', self.env['disk_image'], LF,
                         '--kernel', self.env['image'], LF,
                         '--little-cpus', str(self.env['cpus'] // 2), LF,
+                        '--root', '/dev/vda', LF,
                     ])
                     if self.env['dtb']:
                         cmd.extend([