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mem-cache, configs, arch-arm: Handle partitioning policies through a PartitionManager (#966)

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This PR is offloading some of the partitioning logic to the partitioning
manager, effectively changing
the partitioning interface. Rather than always relying on the
PartitionFieldExtention data structure to
convey partition IDs, we make it implementation defined by introducing
the partitioning manager abstraction.
We want user to be able to extract the partitionId more flexibly and
this requires using a SimObject.

Users can extend the PartitioningManager, overriding the
readPacketPartitionId, therefore providing their
own mean of injecting/extracting partitioning data from a packet
This commit is contained in:
Bobby R. Bruce
2024-04-08 16:05:17 -07:00
committed by GitHub
parent a8d778516d bdb08a5b6c
commit 3af15a535e
24 changed files with 438 additions and 90 deletions
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43
src/dev/arm/Mpam.py Normal file
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@@ -0,0 +1,43 @@
# Copyright (c) 2024 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.
from m5.objects.PartitioningPolicies import PartitionManager
class MpamMSC(PartitionManager):
type = "MpamMSC"
abstract = True
cxx_header = "dev/arm/mpam.hh"
cxx_class = "gem5::mpam::MSC"

2
src/dev/arm/SConscript
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@@ -49,6 +49,7 @@ SimObject('Gic.py', sim_objects=[
'BaseGic', 'ArmInterruptPin', 'ArmSPI', 'ArmPPI', 'ArmSigInterruptPin',
'GicV2', 'Gicv2mFrame', 'Gicv2m', 'VGic', 'Gicv3Its', 'Gicv3'],
enums=['ArmInterruptType'], tags='arm isa')
SimObject('Mpam.py', sim_objects=['MpamMSC'], tags='arm isa')
SimObject('RealView.py', sim_objects=[
'AmbaPioDevice', 'AmbaIntDevice', 'AmbaDmaDevice', 'A9SCU',
'GenericArmPciHost', 'RealViewCtrl', 'RealViewOsc',
@@ -80,6 +81,7 @@ Source('gic_v3_cpu_interface.cc', tags='arm isa')
Source('gic_v3_distributor.cc', tags='arm isa')
Source('gic_v3_redistributor.cc', tags='arm isa')
Source('gic_v3_its.cc', tags='arm isa')
Source('mpam.cc', tags='arm isa')
Source('pl011.cc', tags='arm isa')
Source('pl111.cc', tags='arm isa')
Source('hdlcd.cc', tags='arm isa')

54
src/dev/arm/mpam.cc Normal file
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/*
* Copyright (c) 2024 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.
*/
#include "arch/arm/mpam.hh"
#include "dev/arm/mpam.hh"
namespace gem5::mpam
{
uint64_t
MSC::readPacketPartitionID(PacketPtr pkt) const
{
// get partition_id from PartitionFieldExtension
auto ext = pkt->req->getExtension<ArmISA::mpam::PartitionFieldExtension>();
// use default value if extension is not set
return (ext != nullptr) ? ext->getPartitionID() :
ArmISA::mpam::DEFAULT_PARTITION_ID;
}
} // namespace gem5::mpam

67
src/dev/arm/mpam.hh Normal file
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/*
* Copyright (c) 2024 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.
*/
#ifndef __DEV_ARM_MPAM_HH__
#define __DEV_ARM_MPAM_HH__
#include "mem/cache/tags/partitioning_policies/partition_manager.hh"
namespace gem5::mpam
{
/**
* This class implements a simple MPAM Memory System Component (MSC)
* partitioning controller. For further info refer to:
* https://developer.arm.com/documentation/ddi0598/latest/
*/
class MSC : public partitioning_policy::PartitionManager
{
public:
using partitioning_policy::PartitionManager::PartitionManager;
/**
* Helper function to retrieve PartitionID from a packet; Returns packet
* PartitionID if available or DEFAULT_PARTITION_ID if extention is not set
* @param pkt pointer to packet (PacketPtr)
* @return packet PartitionID.
*/
uint64_t readPacketPartitionID(PacketPtr pkt) const override;
};
} // namespace gem5::mpam
#endif // __DEV_ARM_MPAM_HH__