1# Copyright (c) 2012 ARM Limited
2# All rights reserved.
3#
4# The license below extends only to copyright in the software and shall
5# not be construed as granting a license to any other intellectual
6# property including but not limited to intellectual property relating
7# to a hardware implementation of the functionality of the software
8# licensed hereunder.  You may use the software subject to the license
9# terms below provided that you ensure that this notice is replicated
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11# modified or unmodified, in source code or in binary form.
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13# Redistribution and use in source and binary forms, with or without
14# modification, are permitted provided that the following conditions are
15# met: redistributions of source code must retain the above copyright
16# notice, this list of conditions and the following disclaimer;
17# redistributions in binary form must reproduce the above copyright
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20# neither the name of the copyright holders nor the names of its
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22# this software without specific prior written permission.
23#
24# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
25# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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35#
36# Authors: Andreas Sandberg
37
38from m5.SimObject import *
39from m5.params import *
40from m5.proxy import *
41
42from m5.objects.BaseCPU import BaseCPU
43from m5.objects.KvmVM import KvmVM
44
45class BaseKvmCPU(BaseCPU):
46    type = 'BaseKvmCPU'
47    cxx_header = "cpu/kvm/base.hh"
48    abstract = True
49
50    @cxxMethod
51    def dump(self):
52        """Dump the internal state of KVM to standard out."""
53        pass
54
55    @classmethod
56    def memory_mode(cls):
57        return 'atomic_noncaching'
58
59    @classmethod
60    def require_caches(cls):
61        return False
62
63    @classmethod
64    def support_take_over(cls):
65        return True
66
67    useCoalescedMMIO = Param.Bool(False, "Use coalesced MMIO (EXPERIMENTAL)")
68    usePerfOverflow = Param.Bool(False, "Use perf event overflow counters (EXPERIMENTAL)")
69    alwaysSyncTC = Param.Bool(False,
70                              "Always sync thread contexts on entry/exit")
71
72    hostFreq = Param.Clock("2GHz", "Host clock frequency")
73    hostFactor = Param.Float(1.0, "Cycle scale factor")
74