config: Specify OS type and release on command line

This patch enables users to speficy --os-type on the command
line. This option is used to take specific actions for an OS type,
such as changing the kernel command line. This patch is part of the
Android KitKat enablement.

configs/common/Benchmarks.py

@@ -31,11 +31,13 @@ from os import environ as env
 from m5.defines import buildEnv
 
 class SysConfig:
-    def __init__(self, script=None, mem=None, disk=None, rootdev=None):
+    def __init__(self, script=None, mem=None, disk=None, rootdev=None,
+                 os_type='linux'):
         self.scriptname = script
         self.diskname = disk
         self.memsize = mem
         self.root = rootdev
+        self.ostype = os_type
 
     def script(self):
         if self.scriptname:
@@ -69,6 +71,9 @@ class SysConfig:
         else:
             return '/dev/sda1'
 
+    def os_type(self):
+        return self.ostype
+
 # Benchmarks are defined as a key in a dict which is a list of SysConfigs
 # The first defined machine is the test system, the others are driving systems
 
@@ -119,13 +124,17 @@ Benchmarks = {
 
     'MutexTest':        [SysConfig('mutex-test.rcS', '128MB')],
     'ArmAndroid-GB':    [SysConfig('null.rcS', '256MB',
-                    'ARMv7a-Gingerbread-Android.SMP.mouse.nolock.clean.img')],
+                    'ARMv7a-Gingerbread-Android.SMP.mouse.nolock.clean.img',
+                    None, 'android-gingerbread')],
     'bbench-gb':        [SysConfig('bbench-gb.rcS', '256MB',
-                          'ARMv7a-Gingerbread-Android.SMP.mouse.nolock.img')],
+                            'ARMv7a-Gingerbread-Android.SMP.mouse.nolock.img',
+                            None, 'android-gingerbread')],
     'ArmAndroid-ICS':   [SysConfig('null.rcS', '256MB',
-                            'ARMv7a-ICS-Android.SMP.nolock.clean.img')],
+                            'ARMv7a-ICS-Android.SMP.nolock.clean.img',
+                            None, 'android-ics')],
     'bbench-ics':       [SysConfig('bbench-ics.rcS', '256MB',
-                            'ARMv7a-ICS-Android.SMP.nolock.img')]
+                            'ARMv7a-ICS-Android.SMP.nolock.img',
+                            None, 'android-ics')]
 }
 
 benchs = Benchmarks.keys()

configs/common/FSConfig.py

@@ -43,6 +43,18 @@ from m5.objects import *
 from Benchmarks import *
 from m5.util import *
 
+# Populate to reflect supported os types per target ISA
+os_types = { 'alpha' : [ 'linux' ],
+             'mips'  : [ 'linux' ],
+             'sparc' : [ 'linux' ],
+             'x86'   : [ 'linux' ],
+             'arm'   : [ 'linux',
+                         'android-gingerbread',
+                         'android-ics',
+                         'android-jellybean',
+                         'android-kitkat' ],
+           }
+
 class CowIdeDisk(IdeDisk):
     image = CowDiskImage(child=RawDiskImage(read_only=True),
                          read_only=False)
@@ -54,7 +66,6 @@ class MemBus(SystemXBar):
     badaddr_responder = BadAddr()
     default = Self.badaddr_responder.pio
 
-
 def fillInCmdline(mdesc, template, **kwargs):
     kwargs.setdefault('disk', mdesc.disk())
     kwargs.setdefault('rootdev', mdesc.rootdev())
@@ -286,11 +297,31 @@ def makeArmSystem(mem_mode, machine_type, num_cpus=1, mdesc=None,
         self.gic_cpu_addr = self.realview.gic.cpu_addr
         self.flags_addr = self.realview.realview_io.pio_addr + 0x30
 
-        # Android disk images must have 'android' keyword in the disk name
+        # This check is for users who have previously put 'android' in
-        # Look for 'android' in disk name and append /init to boot_osflags
+        # the disk image filename to tell the config scripts to
+        # prepare the kernel with android-specific boot options. That
+        # behavior has been replaced with a more explicit option per
+        # the error message below. The disk can have any name now and
+        # doesn't need to include 'android' substring.
         if (os.path.split(mdesc.disk())[-1]).lower().count('android'):
+            if 'android' not in mdesc.os_type():
+                fatal("It looks like you are trying to boot an Android " \
+                      "platform.  To boot Android, you must specify " \
+                      "--os-type with an appropriate Android release on " \
+                      "the command line.")
+
+        # android-specific tweaks
+        if 'android' in mdesc.os_type():
+            # generic tweaks
             cmdline += " init=/init"
+
+            # release-specific tweaks
+            if 'kitkat' in mdesc.os_type():
+                cmdline += " androidboot.hardware=gem5 qemu=1 qemu.gles=0 " + \
+                           "android.bootanim=0"
+
         self.boot_osflags = fillInCmdline(mdesc, cmdline)
+
     self.realview.attachOnChipIO(self.membus, self.bridge)
     self.realview.attachIO(self.iobus)
     self.intrctrl = IntrControl()

configs/common/Options.py

@@ -46,6 +46,8 @@ from Benchmarks import *
 import CpuConfig
 import MemConfig
 
+from FSConfig import os_types
+
 def _listCpuTypes(option, opt, value, parser):
     CpuConfig.print_cpu_list()
     sys.exit(0)
@@ -241,6 +243,9 @@ def addFSOptions(parser):
 
     # System options
     parser.add_option("--kernel", action="store", type="string")
+    parser.add_option("--os-type", action="store", type="choice",
+            choices=os_types[buildEnv['TARGET_ISA']], default="linux",
+            help="Specifies type of OS to boot")
     parser.add_option("--script", action="store", type="string")
     parser.add_option("--frame-capture", action="store_true",
             help="Stores changed frame buffers from the VNC server to compressed "\

configs/example/fs.py

@@ -314,12 +314,12 @@ if options.benchmark:
 else:
     if options.dual:
         bm = [SysConfig(disk=options.disk_image, rootdev=options.root_device,
-                        mem=options.mem_size),
+                        mem=options.mem_size, os_type=options.os_type),
               SysConfig(disk=options.disk_image, rootdev=options.root_device,
-                        mem=options.mem_size)]
+                        mem=options.mem_size, os_type=options.os_type)]
     else:
         bm = [SysConfig(disk=options.disk_image, rootdev=options.root_device,
-                        mem=options.mem_size)]
+                        mem=options.mem_size, os_type=options.os_type)]
 
 np = options.num_cpus