xref: /gem5/src/cpu/kvm/BaseKvmCPU.py

# Copyright (c) 2012 ARM Limited
# All rights reserved.
#
# The license below extends only to copyright in the software and shall
# not be construed as granting a license to any other intellectual
# property including but not limited to intellectual property relating
# to a hardware implementation of the functionality of the software
# licensed hereunder.  You may use the software subject to the license
# terms below provided that you ensure that this notice is replicated
# unmodified and in its entirety in all distributions of the software,
# modified or unmodified, in source code or in binary form.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are
# met: redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer;
# redistributions in binary form must reproduce the above copyright
# notice, this list of conditions and the following disclaimer in the
# documentation and/or other materials provided with the distribution;
# neither the name of the copyright holders nor the names of its
# contributors may be used to endorse or promote products derived from
# this software without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#
# Authors: Andreas Sandberg

from m5.params import *
from m5.proxy import *

from BaseCPU import BaseCPU
from KvmVM import KvmVM

class BaseKvmCPU(BaseCPU):
    type = 'BaseKvmCPU'
    cxx_header = "cpu/kvm/base.hh"
    abstract = True

    @classmethod
    def export_method_cxx_predecls(cls, code):
        code('#include "cpu/kvm/base.hh"')

    @classmethod
    def export_methods(cls, code):
        code('''
      void dump();
''')

    @classmethod
    def memory_mode(cls):
        return 'atomic_noncaching'

    @classmethod
    def require_caches(cls):
        return False

    @classmethod
    def support_take_over(cls):
        return True

    kvmVM = Param.KvmVM(Parent.any, 'KVM VM (i.e., shared memory domain)')
    useCoalescedMMIO = Param.Bool(False, "Use coalesced MMIO (EXPERIMENTAL)")
    usePerfOverflow = Param.Bool(False, "Use perf event overflow counters (EXPERIMENTAL)")

    hostFreq = Param.Clock("2GHz", "Host clock frequency")
    hostFactor = Param.Float(1.0, "Cycle scale factor")