base.cc revision 10114
19651SAndreas.Sandberg@ARM.com/* 29651SAndreas.Sandberg@ARM.com * Copyright (c) 2012 ARM Limited 39651SAndreas.Sandberg@ARM.com * All rights reserved 49651SAndreas.Sandberg@ARM.com * 59651SAndreas.Sandberg@ARM.com * The license below extends only to copyright in the software and shall 69651SAndreas.Sandberg@ARM.com * not be construed as granting a license to any other intellectual 79651SAndreas.Sandberg@ARM.com * property including but not limited to intellectual property relating 89651SAndreas.Sandberg@ARM.com * to a hardware implementation of the functionality of the software 99651SAndreas.Sandberg@ARM.com * licensed hereunder. You may use the software subject to the license 109651SAndreas.Sandberg@ARM.com * terms below provided that you ensure that this notice is replicated 119651SAndreas.Sandberg@ARM.com * unmodified and in its entirety in all distributions of the software, 129651SAndreas.Sandberg@ARM.com * modified or unmodified, in source code or in binary form. 139651SAndreas.Sandberg@ARM.com * 149651SAndreas.Sandberg@ARM.com * Redistribution and use in source and binary forms, with or without 159651SAndreas.Sandberg@ARM.com * modification, are permitted provided that the following conditions are 169651SAndreas.Sandberg@ARM.com * met: redistributions of source code must retain the above copyright 179651SAndreas.Sandberg@ARM.com * notice, this list of conditions and the following disclaimer; 189651SAndreas.Sandberg@ARM.com * redistributions in binary form must reproduce the above copyright 199651SAndreas.Sandberg@ARM.com * notice, this list of conditions and the following disclaimer in the 209651SAndreas.Sandberg@ARM.com * documentation and/or other materials provided with the distribution; 219651SAndreas.Sandberg@ARM.com * neither the name of the copyright holders nor the names of its 229651SAndreas.Sandberg@ARM.com * contributors may be used to endorse or promote products derived from 239651SAndreas.Sandberg@ARM.com * this software without specific prior written permission. 249651SAndreas.Sandberg@ARM.com * 259651SAndreas.Sandberg@ARM.com * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 269651SAndreas.Sandberg@ARM.com * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 279651SAndreas.Sandberg@ARM.com * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 289651SAndreas.Sandberg@ARM.com * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 299651SAndreas.Sandberg@ARM.com * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 309651SAndreas.Sandberg@ARM.com * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 319651SAndreas.Sandberg@ARM.com * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 329651SAndreas.Sandberg@ARM.com * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 339651SAndreas.Sandberg@ARM.com * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 349651SAndreas.Sandberg@ARM.com * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 359651SAndreas.Sandberg@ARM.com * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 369651SAndreas.Sandberg@ARM.com * 379651SAndreas.Sandberg@ARM.com * Authors: Andreas Sandberg 389651SAndreas.Sandberg@ARM.com */ 399651SAndreas.Sandberg@ARM.com 409651SAndreas.Sandberg@ARM.com#include <linux/kvm.h> 419651SAndreas.Sandberg@ARM.com#include <sys/ioctl.h> 429651SAndreas.Sandberg@ARM.com#include <sys/mman.h> 439651SAndreas.Sandberg@ARM.com#include <unistd.h> 449651SAndreas.Sandberg@ARM.com 459651SAndreas.Sandberg@ARM.com#include <cerrno> 469651SAndreas.Sandberg@ARM.com#include <csignal> 479651SAndreas.Sandberg@ARM.com#include <ostream> 489651SAndreas.Sandberg@ARM.com 499760Sandreas@sandberg.pp.se#include "arch/mmapped_ipr.hh" 509651SAndreas.Sandberg@ARM.com#include "arch/utility.hh" 519651SAndreas.Sandberg@ARM.com#include "cpu/kvm/base.hh" 529683Sandreas@sandberg.pp.se#include "debug/Checkpoint.hh" 539753Sandreas@sandberg.pp.se#include "debug/Drain.hh" 549651SAndreas.Sandberg@ARM.com#include "debug/Kvm.hh" 559651SAndreas.Sandberg@ARM.com#include "debug/KvmIO.hh" 569651SAndreas.Sandberg@ARM.com#include "debug/KvmRun.hh" 579651SAndreas.Sandberg@ARM.com#include "params/BaseKvmCPU.hh" 589651SAndreas.Sandberg@ARM.com#include "sim/process.hh" 599651SAndreas.Sandberg@ARM.com#include "sim/system.hh" 609651SAndreas.Sandberg@ARM.com 619753Sandreas@sandberg.pp.se#include <signal.h> 629753Sandreas@sandberg.pp.se 639651SAndreas.Sandberg@ARM.com/* Used by some KVM macros */ 649651SAndreas.Sandberg@ARM.com#define PAGE_SIZE pageSize 659651SAndreas.Sandberg@ARM.com 669651SAndreas.Sandberg@ARM.comBaseKvmCPU::BaseKvmCPU(BaseKvmCPUParams *params) 679651SAndreas.Sandberg@ARM.com : BaseCPU(params), 689651SAndreas.Sandberg@ARM.com vm(*params->kvmVM), 699651SAndreas.Sandberg@ARM.com _status(Idle), 709651SAndreas.Sandberg@ARM.com dataPort(name() + ".dcache_port", this), 719651SAndreas.Sandberg@ARM.com instPort(name() + ".icache_port", this), 729652SAndreas.Sandberg@ARM.com threadContextDirty(true), 739652SAndreas.Sandberg@ARM.com kvmStateDirty(false), 749651SAndreas.Sandberg@ARM.com vcpuID(vm.allocVCPUID()), vcpuFD(-1), vcpuMMapSize(0), 759651SAndreas.Sandberg@ARM.com _kvmRun(NULL), mmioRing(NULL), 769651SAndreas.Sandberg@ARM.com pageSize(sysconf(_SC_PAGE_SIZE)), 779651SAndreas.Sandberg@ARM.com tickEvent(*this), 789892Sandreas@sandberg.pp.se activeInstPeriod(0), 799655SAndreas.Sandberg@ARM.com perfControlledByTimer(params->usePerfOverflow), 809752Sandreas@sandberg.pp.se hostFactor(params->hostFactor), 819753Sandreas@sandberg.pp.se drainManager(NULL), 829752Sandreas@sandberg.pp.se ctrInsts(0) 839651SAndreas.Sandberg@ARM.com{ 849651SAndreas.Sandberg@ARM.com if (pageSize == -1) 859651SAndreas.Sandberg@ARM.com panic("KVM: Failed to determine host page size (%i)\n", 869651SAndreas.Sandberg@ARM.com errno); 879651SAndreas.Sandberg@ARM.com 889651SAndreas.Sandberg@ARM.com thread = new SimpleThread(this, 0, params->system, 899651SAndreas.Sandberg@ARM.com params->itb, params->dtb, params->isa[0]); 909651SAndreas.Sandberg@ARM.com thread->setStatus(ThreadContext::Halted); 919651SAndreas.Sandberg@ARM.com tc = thread->getTC(); 929651SAndreas.Sandberg@ARM.com threadContexts.push_back(tc); 939651SAndreas.Sandberg@ARM.com} 949651SAndreas.Sandberg@ARM.com 959651SAndreas.Sandberg@ARM.comBaseKvmCPU::~BaseKvmCPU() 969651SAndreas.Sandberg@ARM.com{ 979651SAndreas.Sandberg@ARM.com if (_kvmRun) 989651SAndreas.Sandberg@ARM.com munmap(_kvmRun, vcpuMMapSize); 999651SAndreas.Sandberg@ARM.com close(vcpuFD); 1009651SAndreas.Sandberg@ARM.com} 1019651SAndreas.Sandberg@ARM.com 1029651SAndreas.Sandberg@ARM.comvoid 1039651SAndreas.Sandberg@ARM.comBaseKvmCPU::init() 1049651SAndreas.Sandberg@ARM.com{ 1059651SAndreas.Sandberg@ARM.com BaseCPU::init(); 1069651SAndreas.Sandberg@ARM.com 1079651SAndreas.Sandberg@ARM.com if (numThreads != 1) 1089651SAndreas.Sandberg@ARM.com fatal("KVM: Multithreading not supported"); 1099651SAndreas.Sandberg@ARM.com 1109651SAndreas.Sandberg@ARM.com tc->initMemProxies(tc); 1119651SAndreas.Sandberg@ARM.com 1129651SAndreas.Sandberg@ARM.com // initialize CPU, including PC 1139651SAndreas.Sandberg@ARM.com if (FullSystem && !switchedOut()) 1149651SAndreas.Sandberg@ARM.com TheISA::initCPU(tc, tc->contextId()); 1159651SAndreas.Sandberg@ARM.com 1169651SAndreas.Sandberg@ARM.com mmio_req.setThreadContext(tc->contextId(), 0); 1179651SAndreas.Sandberg@ARM.com} 1189651SAndreas.Sandberg@ARM.com 1199651SAndreas.Sandberg@ARM.comvoid 1209651SAndreas.Sandberg@ARM.comBaseKvmCPU::startup() 1219651SAndreas.Sandberg@ARM.com{ 1229690Sandreas@sandberg.pp.se const BaseKvmCPUParams * const p( 1239690Sandreas@sandberg.pp.se dynamic_cast<const BaseKvmCPUParams *>(params())); 1249690Sandreas@sandberg.pp.se 1259651SAndreas.Sandberg@ARM.com Kvm &kvm(vm.kvm); 1269651SAndreas.Sandberg@ARM.com 1279651SAndreas.Sandberg@ARM.com BaseCPU::startup(); 1289651SAndreas.Sandberg@ARM.com 1299651SAndreas.Sandberg@ARM.com assert(vcpuFD == -1); 1309651SAndreas.Sandberg@ARM.com 1319651SAndreas.Sandberg@ARM.com // Tell the VM that a CPU is about to start. 1329651SAndreas.Sandberg@ARM.com vm.cpuStartup(); 1339651SAndreas.Sandberg@ARM.com 1349651SAndreas.Sandberg@ARM.com // We can't initialize KVM CPUs in BaseKvmCPU::init() since we are 1359651SAndreas.Sandberg@ARM.com // not guaranteed that the parent KVM VM has initialized at that 1369651SAndreas.Sandberg@ARM.com // point. Initialize virtual CPUs here instead. 1379651SAndreas.Sandberg@ARM.com vcpuFD = vm.createVCPU(vcpuID); 1389651SAndreas.Sandberg@ARM.com 1399651SAndreas.Sandberg@ARM.com // Map the KVM run structure */ 1409651SAndreas.Sandberg@ARM.com vcpuMMapSize = kvm.getVCPUMMapSize(); 1419651SAndreas.Sandberg@ARM.com _kvmRun = (struct kvm_run *)mmap(0, vcpuMMapSize, 1429651SAndreas.Sandberg@ARM.com PROT_READ | PROT_WRITE, MAP_SHARED, 1439651SAndreas.Sandberg@ARM.com vcpuFD, 0); 1449651SAndreas.Sandberg@ARM.com if (_kvmRun == MAP_FAILED) 1459651SAndreas.Sandberg@ARM.com panic("KVM: Failed to map run data structure\n"); 1469651SAndreas.Sandberg@ARM.com 1479651SAndreas.Sandberg@ARM.com // Setup a pointer to the MMIO ring buffer if coalesced MMIO is 1489651SAndreas.Sandberg@ARM.com // available. The offset into the KVM's communication page is 1499651SAndreas.Sandberg@ARM.com // provided by the coalesced MMIO capability. 1509651SAndreas.Sandberg@ARM.com int mmioOffset(kvm.capCoalescedMMIO()); 1519690Sandreas@sandberg.pp.se if (!p->useCoalescedMMIO) { 1529690Sandreas@sandberg.pp.se inform("KVM: Coalesced MMIO disabled by config.\n"); 1539690Sandreas@sandberg.pp.se } else if (mmioOffset) { 1549651SAndreas.Sandberg@ARM.com inform("KVM: Coalesced IO available\n"); 1559651SAndreas.Sandberg@ARM.com mmioRing = (struct kvm_coalesced_mmio_ring *)( 1569651SAndreas.Sandberg@ARM.com (char *)_kvmRun + (mmioOffset * pageSize)); 1579651SAndreas.Sandberg@ARM.com } else { 1589651SAndreas.Sandberg@ARM.com inform("KVM: Coalesced not supported by host OS\n"); 1599651SAndreas.Sandberg@ARM.com } 1609732Sandreas@sandberg.pp.se 1619732Sandreas@sandberg.pp.se thread->startup(); 16210073Sandreas@sandberg.pp.se 16310073Sandreas@sandberg.pp.se Event *startupEvent( 16410073Sandreas@sandberg.pp.se new EventWrapper<BaseKvmCPU, 16510073Sandreas@sandberg.pp.se &BaseKvmCPU::startupThread>(this, true)); 16610073Sandreas@sandberg.pp.se schedule(startupEvent, curTick()); 16710073Sandreas@sandberg.pp.se} 16810073Sandreas@sandberg.pp.se 16910073Sandreas@sandberg.pp.sevoid 17010073Sandreas@sandberg.pp.seBaseKvmCPU::startupThread() 17110073Sandreas@sandberg.pp.se{ 17210073Sandreas@sandberg.pp.se // Do thread-specific initialization. We need to setup signal 17310073Sandreas@sandberg.pp.se // delivery for counters and timers from within the thread that 17410073Sandreas@sandberg.pp.se // will execute the event queue to ensure that signals are 17510073Sandreas@sandberg.pp.se // delivered to the right threads. 17610073Sandreas@sandberg.pp.se const BaseKvmCPUParams * const p( 17710073Sandreas@sandberg.pp.se dynamic_cast<const BaseKvmCPUParams *>(params())); 17810073Sandreas@sandberg.pp.se 17910114Sandreas@sandberg.pp.se vcpuThread = pthread_self(); 18010114Sandreas@sandberg.pp.se 18110098Sandreas@sandberg.pp.se // Setup signal handlers. This has to be done after the vCPU is 18210098Sandreas@sandberg.pp.se // created since it manipulates the vCPU signal mask. 18310098Sandreas@sandberg.pp.se setupSignalHandler(); 18410098Sandreas@sandberg.pp.se 18510073Sandreas@sandberg.pp.se setupCounters(); 18610073Sandreas@sandberg.pp.se 18710073Sandreas@sandberg.pp.se if (p->usePerfOverflow) 18810073Sandreas@sandberg.pp.se runTimer.reset(new PerfKvmTimer(hwCycles, 18910114Sandreas@sandberg.pp.se KVM_KICK_SIGNAL, 19010073Sandreas@sandberg.pp.se p->hostFactor, 19110073Sandreas@sandberg.pp.se p->hostFreq)); 19210073Sandreas@sandberg.pp.se else 19310114Sandreas@sandberg.pp.se runTimer.reset(new PosixKvmTimer(KVM_KICK_SIGNAL, CLOCK_MONOTONIC, 19410073Sandreas@sandberg.pp.se p->hostFactor, 19510073Sandreas@sandberg.pp.se p->hostFreq)); 19610073Sandreas@sandberg.pp.se 1979651SAndreas.Sandberg@ARM.com} 1989651SAndreas.Sandberg@ARM.com 1999651SAndreas.Sandberg@ARM.comvoid 2009651SAndreas.Sandberg@ARM.comBaseKvmCPU::regStats() 2019651SAndreas.Sandberg@ARM.com{ 2029651SAndreas.Sandberg@ARM.com using namespace Stats; 2039651SAndreas.Sandberg@ARM.com 2049651SAndreas.Sandberg@ARM.com BaseCPU::regStats(); 2059651SAndreas.Sandberg@ARM.com 2069684Sandreas@sandberg.pp.se numInsts 2079684Sandreas@sandberg.pp.se .name(name() + ".committedInsts") 2089684Sandreas@sandberg.pp.se .desc("Number of instructions committed") 2099684Sandreas@sandberg.pp.se ; 2109684Sandreas@sandberg.pp.se 2119651SAndreas.Sandberg@ARM.com numVMExits 2129651SAndreas.Sandberg@ARM.com .name(name() + ".numVMExits") 2139651SAndreas.Sandberg@ARM.com .desc("total number of KVM exits") 2149651SAndreas.Sandberg@ARM.com ; 2159651SAndreas.Sandberg@ARM.com 2169755Sandreas@sandberg.pp.se numVMHalfEntries 2179755Sandreas@sandberg.pp.se .name(name() + ".numVMHalfEntries") 2189755Sandreas@sandberg.pp.se .desc("number of KVM entries to finalize pending operations") 2199755Sandreas@sandberg.pp.se ; 2209755Sandreas@sandberg.pp.se 2219755Sandreas@sandberg.pp.se numExitSignal 2229755Sandreas@sandberg.pp.se .name(name() + ".numExitSignal") 2239755Sandreas@sandberg.pp.se .desc("exits due to signal delivery") 2249755Sandreas@sandberg.pp.se ; 2259755Sandreas@sandberg.pp.se 2269651SAndreas.Sandberg@ARM.com numMMIO 2279651SAndreas.Sandberg@ARM.com .name(name() + ".numMMIO") 2289651SAndreas.Sandberg@ARM.com .desc("number of VM exits due to memory mapped IO") 2299651SAndreas.Sandberg@ARM.com ; 2309651SAndreas.Sandberg@ARM.com 2319651SAndreas.Sandberg@ARM.com numCoalescedMMIO 2329651SAndreas.Sandberg@ARM.com .name(name() + ".numCoalescedMMIO") 2339651SAndreas.Sandberg@ARM.com .desc("number of coalesced memory mapped IO requests") 2349651SAndreas.Sandberg@ARM.com ; 2359651SAndreas.Sandberg@ARM.com 2369651SAndreas.Sandberg@ARM.com numIO 2379651SAndreas.Sandberg@ARM.com .name(name() + ".numIO") 2389651SAndreas.Sandberg@ARM.com .desc("number of VM exits due to legacy IO") 2399651SAndreas.Sandberg@ARM.com ; 2409651SAndreas.Sandberg@ARM.com 2419651SAndreas.Sandberg@ARM.com numHalt 2429651SAndreas.Sandberg@ARM.com .name(name() + ".numHalt") 2439651SAndreas.Sandberg@ARM.com .desc("number of VM exits due to wait for interrupt instructions") 2449651SAndreas.Sandberg@ARM.com ; 2459651SAndreas.Sandberg@ARM.com 2469651SAndreas.Sandberg@ARM.com numInterrupts 2479651SAndreas.Sandberg@ARM.com .name(name() + ".numInterrupts") 2489651SAndreas.Sandberg@ARM.com .desc("number of interrupts delivered") 2499651SAndreas.Sandberg@ARM.com ; 2509651SAndreas.Sandberg@ARM.com 2519651SAndreas.Sandberg@ARM.com numHypercalls 2529651SAndreas.Sandberg@ARM.com .name(name() + ".numHypercalls") 2539651SAndreas.Sandberg@ARM.com .desc("number of hypercalls") 2549651SAndreas.Sandberg@ARM.com ; 2559651SAndreas.Sandberg@ARM.com} 2569651SAndreas.Sandberg@ARM.com 2579651SAndreas.Sandberg@ARM.comvoid 2589651SAndreas.Sandberg@ARM.comBaseKvmCPU::serializeThread(std::ostream &os, ThreadID tid) 2599651SAndreas.Sandberg@ARM.com{ 2609683Sandreas@sandberg.pp.se if (DTRACE(Checkpoint)) { 2619683Sandreas@sandberg.pp.se DPRINTF(Checkpoint, "KVM: Serializing thread %i:\n", tid); 2629683Sandreas@sandberg.pp.se dump(); 2639683Sandreas@sandberg.pp.se } 2649683Sandreas@sandberg.pp.se 2659651SAndreas.Sandberg@ARM.com assert(tid == 0); 2669651SAndreas.Sandberg@ARM.com assert(_status == Idle); 2679651SAndreas.Sandberg@ARM.com thread->serialize(os); 2689651SAndreas.Sandberg@ARM.com} 2699651SAndreas.Sandberg@ARM.com 2709651SAndreas.Sandberg@ARM.comvoid 2719651SAndreas.Sandberg@ARM.comBaseKvmCPU::unserializeThread(Checkpoint *cp, const std::string §ion, 2729651SAndreas.Sandberg@ARM.com ThreadID tid) 2739651SAndreas.Sandberg@ARM.com{ 2749683Sandreas@sandberg.pp.se DPRINTF(Checkpoint, "KVM: Unserialize thread %i:\n", tid); 2759683Sandreas@sandberg.pp.se 2769651SAndreas.Sandberg@ARM.com assert(tid == 0); 2779651SAndreas.Sandberg@ARM.com assert(_status == Idle); 2789651SAndreas.Sandberg@ARM.com thread->unserialize(cp, section); 2799652SAndreas.Sandberg@ARM.com threadContextDirty = true; 2809651SAndreas.Sandberg@ARM.com} 2819651SAndreas.Sandberg@ARM.com 2829651SAndreas.Sandberg@ARM.comunsigned int 2839651SAndreas.Sandberg@ARM.comBaseKvmCPU::drain(DrainManager *dm) 2849651SAndreas.Sandberg@ARM.com{ 2859651SAndreas.Sandberg@ARM.com if (switchedOut()) 2869651SAndreas.Sandberg@ARM.com return 0; 2879651SAndreas.Sandberg@ARM.com 2889753Sandreas@sandberg.pp.se DPRINTF(Drain, "BaseKvmCPU::drain\n"); 2899753Sandreas@sandberg.pp.se switch (_status) { 2909753Sandreas@sandberg.pp.se case Running: 2919753Sandreas@sandberg.pp.se // The base KVM code is normally ready when it is in the 2929753Sandreas@sandberg.pp.se // Running state, but the architecture specific code might be 2939753Sandreas@sandberg.pp.se // of a different opinion. This may happen when the CPU been 2949753Sandreas@sandberg.pp.se // notified of an event that hasn't been accepted by the vCPU 2959753Sandreas@sandberg.pp.se // yet. 2969753Sandreas@sandberg.pp.se if (!archIsDrained()) { 2979753Sandreas@sandberg.pp.se drainManager = dm; 2989753Sandreas@sandberg.pp.se return 1; 2999753Sandreas@sandberg.pp.se } 3009651SAndreas.Sandberg@ARM.com 3019753Sandreas@sandberg.pp.se // The state of the CPU is consistent, so we don't need to do 3029753Sandreas@sandberg.pp.se // anything special to drain it. We simply de-schedule the 3039753Sandreas@sandberg.pp.se // tick event and enter the Idle state to prevent nasty things 3049753Sandreas@sandberg.pp.se // like MMIOs from happening. 3059753Sandreas@sandberg.pp.se if (tickEvent.scheduled()) 3069753Sandreas@sandberg.pp.se deschedule(tickEvent); 3079753Sandreas@sandberg.pp.se _status = Idle; 3089651SAndreas.Sandberg@ARM.com 3099753Sandreas@sandberg.pp.se /** FALLTHROUGH */ 3109753Sandreas@sandberg.pp.se case Idle: 3119753Sandreas@sandberg.pp.se // Idle, no need to drain 3129753Sandreas@sandberg.pp.se assert(!tickEvent.scheduled()); 3139753Sandreas@sandberg.pp.se 3149753Sandreas@sandberg.pp.se // Sync the thread context here since we'll need it when we 3159753Sandreas@sandberg.pp.se // switch CPUs or checkpoint the CPU. 3169753Sandreas@sandberg.pp.se syncThreadContext(); 3179753Sandreas@sandberg.pp.se 3189753Sandreas@sandberg.pp.se return 0; 3199753Sandreas@sandberg.pp.se 3209753Sandreas@sandberg.pp.se case RunningServiceCompletion: 3219753Sandreas@sandberg.pp.se // The CPU has just requested a service that was handled in 3229753Sandreas@sandberg.pp.se // the RunningService state, but the results have still not 3239753Sandreas@sandberg.pp.se // been reported to the CPU. Now, we /could/ probably just 3249753Sandreas@sandberg.pp.se // update the register state ourselves instead of letting KVM 3259753Sandreas@sandberg.pp.se // handle it, but that would be tricky. Instead, we enter KVM 3269753Sandreas@sandberg.pp.se // and let it do its stuff. 3279753Sandreas@sandberg.pp.se drainManager = dm; 3289753Sandreas@sandberg.pp.se 3299753Sandreas@sandberg.pp.se DPRINTF(Drain, "KVM CPU is waiting for service completion, " 3309753Sandreas@sandberg.pp.se "requesting drain.\n"); 3319753Sandreas@sandberg.pp.se return 1; 3329753Sandreas@sandberg.pp.se 3339753Sandreas@sandberg.pp.se case RunningService: 3349753Sandreas@sandberg.pp.se // We need to drain since the CPU is waiting for service (e.g., MMIOs) 3359753Sandreas@sandberg.pp.se drainManager = dm; 3369753Sandreas@sandberg.pp.se 3379753Sandreas@sandberg.pp.se DPRINTF(Drain, "KVM CPU is waiting for service, requesting drain.\n"); 3389753Sandreas@sandberg.pp.se return 1; 3399753Sandreas@sandberg.pp.se 3409753Sandreas@sandberg.pp.se default: 3419753Sandreas@sandberg.pp.se panic("KVM: Unhandled CPU state in drain()\n"); 3429753Sandreas@sandberg.pp.se return 0; 3439753Sandreas@sandberg.pp.se } 3449651SAndreas.Sandberg@ARM.com} 3459651SAndreas.Sandberg@ARM.com 3469651SAndreas.Sandberg@ARM.comvoid 3479651SAndreas.Sandberg@ARM.comBaseKvmCPU::drainResume() 3489651SAndreas.Sandberg@ARM.com{ 3499651SAndreas.Sandberg@ARM.com assert(!tickEvent.scheduled()); 3509651SAndreas.Sandberg@ARM.com 3519651SAndreas.Sandberg@ARM.com // We might have been switched out. In that case, we don't need to 3529651SAndreas.Sandberg@ARM.com // do anything. 3539651SAndreas.Sandberg@ARM.com if (switchedOut()) 3549651SAndreas.Sandberg@ARM.com return; 3559651SAndreas.Sandberg@ARM.com 3569651SAndreas.Sandberg@ARM.com DPRINTF(Kvm, "drainResume\n"); 3579651SAndreas.Sandberg@ARM.com verifyMemoryMode(); 3589651SAndreas.Sandberg@ARM.com 3599651SAndreas.Sandberg@ARM.com // The tick event is de-scheduled as a part of the draining 3609651SAndreas.Sandberg@ARM.com // process. Re-schedule it if the thread context is active. 3619651SAndreas.Sandberg@ARM.com if (tc->status() == ThreadContext::Active) { 3629651SAndreas.Sandberg@ARM.com schedule(tickEvent, nextCycle()); 3639651SAndreas.Sandberg@ARM.com _status = Running; 3649651SAndreas.Sandberg@ARM.com } else { 3659651SAndreas.Sandberg@ARM.com _status = Idle; 3669651SAndreas.Sandberg@ARM.com } 3679651SAndreas.Sandberg@ARM.com} 3689651SAndreas.Sandberg@ARM.com 3699651SAndreas.Sandberg@ARM.comvoid 3709651SAndreas.Sandberg@ARM.comBaseKvmCPU::switchOut() 3719651SAndreas.Sandberg@ARM.com{ 3729652SAndreas.Sandberg@ARM.com DPRINTF(Kvm, "switchOut\n"); 3739652SAndreas.Sandberg@ARM.com 3749651SAndreas.Sandberg@ARM.com BaseCPU::switchOut(); 3759651SAndreas.Sandberg@ARM.com 3769651SAndreas.Sandberg@ARM.com // We should have drained prior to executing a switchOut, which 3779651SAndreas.Sandberg@ARM.com // means that the tick event shouldn't be scheduled and the CPU is 3789651SAndreas.Sandberg@ARM.com // idle. 3799651SAndreas.Sandberg@ARM.com assert(!tickEvent.scheduled()); 3809651SAndreas.Sandberg@ARM.com assert(_status == Idle); 3819651SAndreas.Sandberg@ARM.com} 3829651SAndreas.Sandberg@ARM.com 3839651SAndreas.Sandberg@ARM.comvoid 3849651SAndreas.Sandberg@ARM.comBaseKvmCPU::takeOverFrom(BaseCPU *cpu) 3859651SAndreas.Sandberg@ARM.com{ 3869651SAndreas.Sandberg@ARM.com DPRINTF(Kvm, "takeOverFrom\n"); 3879651SAndreas.Sandberg@ARM.com 3889651SAndreas.Sandberg@ARM.com BaseCPU::takeOverFrom(cpu); 3899651SAndreas.Sandberg@ARM.com 3909651SAndreas.Sandberg@ARM.com // We should have drained prior to executing a switchOut, which 3919651SAndreas.Sandberg@ARM.com // means that the tick event shouldn't be scheduled and the CPU is 3929651SAndreas.Sandberg@ARM.com // idle. 3939651SAndreas.Sandberg@ARM.com assert(!tickEvent.scheduled()); 3949651SAndreas.Sandberg@ARM.com assert(_status == Idle); 3959651SAndreas.Sandberg@ARM.com assert(threadContexts.size() == 1); 3969651SAndreas.Sandberg@ARM.com 3979753Sandreas@sandberg.pp.se // Force an update of the KVM state here instead of flagging the 3989753Sandreas@sandberg.pp.se // TC as dirty. This is not ideal from a performance point of 3999753Sandreas@sandberg.pp.se // view, but it makes debugging easier as it allows meaningful KVM 4009753Sandreas@sandberg.pp.se // state to be dumped before and after a takeover. 4019753Sandreas@sandberg.pp.se updateKvmState(); 4029753Sandreas@sandberg.pp.se threadContextDirty = false; 4039651SAndreas.Sandberg@ARM.com} 4049651SAndreas.Sandberg@ARM.com 4059651SAndreas.Sandberg@ARM.comvoid 4069651SAndreas.Sandberg@ARM.comBaseKvmCPU::verifyMemoryMode() const 4079651SAndreas.Sandberg@ARM.com{ 4089651SAndreas.Sandberg@ARM.com if (!(system->isAtomicMode() && system->bypassCaches())) { 4099651SAndreas.Sandberg@ARM.com fatal("The KVM-based CPUs requires the memory system to be in the " 4109651SAndreas.Sandberg@ARM.com "'atomic_noncaching' mode.\n"); 4119651SAndreas.Sandberg@ARM.com } 4129651SAndreas.Sandberg@ARM.com} 4139651SAndreas.Sandberg@ARM.com 4149651SAndreas.Sandberg@ARM.comvoid 4159651SAndreas.Sandberg@ARM.comBaseKvmCPU::wakeup() 4169651SAndreas.Sandberg@ARM.com{ 4179651SAndreas.Sandberg@ARM.com DPRINTF(Kvm, "wakeup()\n"); 4189651SAndreas.Sandberg@ARM.com 4199651SAndreas.Sandberg@ARM.com if (thread->status() != ThreadContext::Suspended) 4209651SAndreas.Sandberg@ARM.com return; 4219651SAndreas.Sandberg@ARM.com 4229651SAndreas.Sandberg@ARM.com thread->activate(); 4239651SAndreas.Sandberg@ARM.com} 4249651SAndreas.Sandberg@ARM.com 4259651SAndreas.Sandberg@ARM.comvoid 4269651SAndreas.Sandberg@ARM.comBaseKvmCPU::activateContext(ThreadID thread_num, Cycles delay) 4279651SAndreas.Sandberg@ARM.com{ 4289651SAndreas.Sandberg@ARM.com DPRINTF(Kvm, "ActivateContext %d (%d cycles)\n", thread_num, delay); 4299651SAndreas.Sandberg@ARM.com 4309651SAndreas.Sandberg@ARM.com assert(thread_num == 0); 4319651SAndreas.Sandberg@ARM.com assert(thread); 4329651SAndreas.Sandberg@ARM.com 4339651SAndreas.Sandberg@ARM.com assert(_status == Idle); 4349651SAndreas.Sandberg@ARM.com assert(!tickEvent.scheduled()); 4359651SAndreas.Sandberg@ARM.com 4369754Sandreas@sandberg.pp.se numCycles += ticksToCycles(thread->lastActivate - thread->lastSuspend); 4379651SAndreas.Sandberg@ARM.com 4389651SAndreas.Sandberg@ARM.com schedule(tickEvent, clockEdge(delay)); 4399651SAndreas.Sandberg@ARM.com _status = Running; 4409651SAndreas.Sandberg@ARM.com} 4419651SAndreas.Sandberg@ARM.com 4429651SAndreas.Sandberg@ARM.com 4439651SAndreas.Sandberg@ARM.comvoid 4449651SAndreas.Sandberg@ARM.comBaseKvmCPU::suspendContext(ThreadID thread_num) 4459651SAndreas.Sandberg@ARM.com{ 4469651SAndreas.Sandberg@ARM.com DPRINTF(Kvm, "SuspendContext %d\n", thread_num); 4479651SAndreas.Sandberg@ARM.com 4489651SAndreas.Sandberg@ARM.com assert(thread_num == 0); 4499651SAndreas.Sandberg@ARM.com assert(thread); 4509651SAndreas.Sandberg@ARM.com 4519651SAndreas.Sandberg@ARM.com if (_status == Idle) 4529651SAndreas.Sandberg@ARM.com return; 4539651SAndreas.Sandberg@ARM.com 4549651SAndreas.Sandberg@ARM.com assert(_status == Running); 4559651SAndreas.Sandberg@ARM.com 4569651SAndreas.Sandberg@ARM.com // The tick event may no be scheduled if the quest has requested 4579651SAndreas.Sandberg@ARM.com // the monitor to wait for interrupts. The normal CPU models can 4589651SAndreas.Sandberg@ARM.com // get their tick events descheduled by quiesce instructions, but 4599651SAndreas.Sandberg@ARM.com // that can't happen here. 4609651SAndreas.Sandberg@ARM.com if (tickEvent.scheduled()) 4619651SAndreas.Sandberg@ARM.com deschedule(tickEvent); 4629651SAndreas.Sandberg@ARM.com 4639651SAndreas.Sandberg@ARM.com _status = Idle; 4649651SAndreas.Sandberg@ARM.com} 4659651SAndreas.Sandberg@ARM.com 4669651SAndreas.Sandberg@ARM.comvoid 4679651SAndreas.Sandberg@ARM.comBaseKvmCPU::deallocateContext(ThreadID thread_num) 4689651SAndreas.Sandberg@ARM.com{ 4699651SAndreas.Sandberg@ARM.com // for now, these are equivalent 4709651SAndreas.Sandberg@ARM.com suspendContext(thread_num); 4719651SAndreas.Sandberg@ARM.com} 4729651SAndreas.Sandberg@ARM.com 4739651SAndreas.Sandberg@ARM.comvoid 4749651SAndreas.Sandberg@ARM.comBaseKvmCPU::haltContext(ThreadID thread_num) 4759651SAndreas.Sandberg@ARM.com{ 4769651SAndreas.Sandberg@ARM.com // for now, these are equivalent 4779651SAndreas.Sandberg@ARM.com suspendContext(thread_num); 4789651SAndreas.Sandberg@ARM.com} 4799651SAndreas.Sandberg@ARM.com 4809652SAndreas.Sandberg@ARM.comThreadContext * 4819652SAndreas.Sandberg@ARM.comBaseKvmCPU::getContext(int tn) 4829652SAndreas.Sandberg@ARM.com{ 4839652SAndreas.Sandberg@ARM.com assert(tn == 0); 4849652SAndreas.Sandberg@ARM.com syncThreadContext(); 4859652SAndreas.Sandberg@ARM.com return tc; 4869652SAndreas.Sandberg@ARM.com} 4879652SAndreas.Sandberg@ARM.com 4889652SAndreas.Sandberg@ARM.com 4899651SAndreas.Sandberg@ARM.comCounter 4909651SAndreas.Sandberg@ARM.comBaseKvmCPU::totalInsts() const 4919651SAndreas.Sandberg@ARM.com{ 4929752Sandreas@sandberg.pp.se return ctrInsts; 4939651SAndreas.Sandberg@ARM.com} 4949651SAndreas.Sandberg@ARM.com 4959651SAndreas.Sandberg@ARM.comCounter 4969651SAndreas.Sandberg@ARM.comBaseKvmCPU::totalOps() const 4979651SAndreas.Sandberg@ARM.com{ 4989651SAndreas.Sandberg@ARM.com hack_once("Pretending totalOps is equivalent to totalInsts()\n"); 4999752Sandreas@sandberg.pp.se return ctrInsts; 5009651SAndreas.Sandberg@ARM.com} 5019651SAndreas.Sandberg@ARM.com 5029651SAndreas.Sandberg@ARM.comvoid 5039651SAndreas.Sandberg@ARM.comBaseKvmCPU::dump() 5049651SAndreas.Sandberg@ARM.com{ 5059651SAndreas.Sandberg@ARM.com inform("State dumping not implemented."); 5069651SAndreas.Sandberg@ARM.com} 5079651SAndreas.Sandberg@ARM.com 5089651SAndreas.Sandberg@ARM.comvoid 5099651SAndreas.Sandberg@ARM.comBaseKvmCPU::tick() 5109651SAndreas.Sandberg@ARM.com{ 5119753Sandreas@sandberg.pp.se Tick delay(0); 5129753Sandreas@sandberg.pp.se assert(_status != Idle); 5139651SAndreas.Sandberg@ARM.com 5149651SAndreas.Sandberg@ARM.com switch (_status) { 5159753Sandreas@sandberg.pp.se case RunningService: 5169753Sandreas@sandberg.pp.se // handleKvmExit() will determine the next state of the CPU 5179753Sandreas@sandberg.pp.se delay = handleKvmExit(); 5189753Sandreas@sandberg.pp.se 5199753Sandreas@sandberg.pp.se if (tryDrain()) 5209753Sandreas@sandberg.pp.se _status = Idle; 5219651SAndreas.Sandberg@ARM.com break; 5229651SAndreas.Sandberg@ARM.com 5239753Sandreas@sandberg.pp.se case RunningServiceCompletion: 5249753Sandreas@sandberg.pp.se case Running: { 5259983Sstever@gmail.com EventQueue *q = curEventQueue(); 5269983Sstever@gmail.com Tick ticksToExecute(q->nextTick() - curTick()); 5279753Sandreas@sandberg.pp.se 5289753Sandreas@sandberg.pp.se // We might need to update the KVM state. 5299753Sandreas@sandberg.pp.se syncKvmState(); 5309753Sandreas@sandberg.pp.se 5319892Sandreas@sandberg.pp.se // Setup any pending instruction count breakpoints using 5329892Sandreas@sandberg.pp.se // PerfEvent. 5339892Sandreas@sandberg.pp.se setupInstStop(); 5349892Sandreas@sandberg.pp.se 5359753Sandreas@sandberg.pp.se DPRINTF(KvmRun, "Entering KVM...\n"); 5369753Sandreas@sandberg.pp.se if (drainManager) { 5379753Sandreas@sandberg.pp.se // Force an immediate exit from KVM after completing 5389753Sandreas@sandberg.pp.se // pending operations. The architecture-specific code 5399753Sandreas@sandberg.pp.se // takes care to run until it is in a state where it can 5409753Sandreas@sandberg.pp.se // safely be drained. 5419753Sandreas@sandberg.pp.se delay = kvmRunDrain(); 5429753Sandreas@sandberg.pp.se } else { 5439753Sandreas@sandberg.pp.se delay = kvmRun(ticksToExecute); 5449753Sandreas@sandberg.pp.se } 5459753Sandreas@sandberg.pp.se 54610112Sandreas@sandberg.pp.se // The CPU might have been suspended before entering into 54710112Sandreas@sandberg.pp.se // KVM. Assume that the CPU was suspended /before/ entering 54810112Sandreas@sandberg.pp.se // into KVM and skip the exit handling. 54910112Sandreas@sandberg.pp.se if (_status == Idle) 55010112Sandreas@sandberg.pp.se break; 55110112Sandreas@sandberg.pp.se 5529753Sandreas@sandberg.pp.se // Entering into KVM implies that we'll have to reload the thread 5539753Sandreas@sandberg.pp.se // context from KVM if we want to access it. Flag the KVM state as 5549753Sandreas@sandberg.pp.se // dirty with respect to the cached thread context. 5559753Sandreas@sandberg.pp.se kvmStateDirty = true; 5569753Sandreas@sandberg.pp.se 5579753Sandreas@sandberg.pp.se // Enter into the RunningService state unless the 5589753Sandreas@sandberg.pp.se // simulation was stopped by a timer. 5599755Sandreas@sandberg.pp.se if (_kvmRun->exit_reason != KVM_EXIT_INTR) { 5609753Sandreas@sandberg.pp.se _status = RunningService; 5619755Sandreas@sandberg.pp.se } else { 5629755Sandreas@sandberg.pp.se ++numExitSignal; 5639753Sandreas@sandberg.pp.se _status = Running; 5649755Sandreas@sandberg.pp.se } 5659753Sandreas@sandberg.pp.se 5669904Sandreas@sandberg.pp.se // Service any pending instruction events. The vCPU should 5679904Sandreas@sandberg.pp.se // have exited in time for the event using the instruction 5689904Sandreas@sandberg.pp.se // counter configured by setupInstStop(). 5699904Sandreas@sandberg.pp.se comInstEventQueue[0]->serviceEvents(ctrInsts); 5709904Sandreas@sandberg.pp.se system->instEventQueue.serviceEvents(system->totalNumInsts); 5719904Sandreas@sandberg.pp.se 5729753Sandreas@sandberg.pp.se if (tryDrain()) 5739753Sandreas@sandberg.pp.se _status = Idle; 5749753Sandreas@sandberg.pp.se } break; 5759753Sandreas@sandberg.pp.se 5769651SAndreas.Sandberg@ARM.com default: 5779753Sandreas@sandberg.pp.se panic("BaseKvmCPU entered tick() in an illegal state (%i)\n", 5789753Sandreas@sandberg.pp.se _status); 5799651SAndreas.Sandberg@ARM.com } 5809753Sandreas@sandberg.pp.se 5819753Sandreas@sandberg.pp.se // Schedule a new tick if we are still running 5829753Sandreas@sandberg.pp.se if (_status != Idle) 5839753Sandreas@sandberg.pp.se schedule(tickEvent, clockEdge(ticksToCycles(delay))); 5849753Sandreas@sandberg.pp.se} 5859753Sandreas@sandberg.pp.se 5869753Sandreas@sandberg.pp.seTick 5879753Sandreas@sandberg.pp.seBaseKvmCPU::kvmRunDrain() 5889753Sandreas@sandberg.pp.se{ 5899753Sandreas@sandberg.pp.se // By default, the only thing we need to drain is a pending IO 5909753Sandreas@sandberg.pp.se // operation which assumes that we are in the 5919753Sandreas@sandberg.pp.se // RunningServiceCompletion state. 5929753Sandreas@sandberg.pp.se assert(_status == RunningServiceCompletion); 5939753Sandreas@sandberg.pp.se 5949753Sandreas@sandberg.pp.se // Deliver the data from the pending IO operation and immediately 5959753Sandreas@sandberg.pp.se // exit. 5969753Sandreas@sandberg.pp.se return kvmRun(0); 5979651SAndreas.Sandberg@ARM.com} 5989651SAndreas.Sandberg@ARM.com 5999735Sandreas@sandberg.pp.seuint64_t 6009735Sandreas@sandberg.pp.seBaseKvmCPU::getHostCycles() const 6019735Sandreas@sandberg.pp.se{ 6029735Sandreas@sandberg.pp.se return hwCycles.read(); 6039735Sandreas@sandberg.pp.se} 6049735Sandreas@sandberg.pp.se 6059651SAndreas.Sandberg@ARM.comTick 6069651SAndreas.Sandberg@ARM.comBaseKvmCPU::kvmRun(Tick ticks) 6079651SAndreas.Sandberg@ARM.com{ 6089753Sandreas@sandberg.pp.se Tick ticksExecuted; 6099651SAndreas.Sandberg@ARM.com DPRINTF(KvmRun, "KVM: Executing for %i ticks\n", ticks); 6109655SAndreas.Sandberg@ARM.com 6119753Sandreas@sandberg.pp.se if (ticks == 0) { 6129753Sandreas@sandberg.pp.se // Settings ticks == 0 is a special case which causes an entry 6139753Sandreas@sandberg.pp.se // into KVM that finishes pending operations (e.g., IO) and 6149753Sandreas@sandberg.pp.se // then immediately exits. 6159753Sandreas@sandberg.pp.se DPRINTF(KvmRun, "KVM: Delivering IO without full guest entry\n"); 6169735Sandreas@sandberg.pp.se 6179755Sandreas@sandberg.pp.se ++numVMHalfEntries; 6189755Sandreas@sandberg.pp.se 61910114Sandreas@sandberg.pp.se // Send a KVM_KICK_SIGNAL to the vCPU thread (i.e., this 62010114Sandreas@sandberg.pp.se // thread). The KVM control signal is masked while executing 62110114Sandreas@sandberg.pp.se // in gem5 and gets unmasked temporarily as when entering 6229753Sandreas@sandberg.pp.se // KVM. See setSignalMask() and setupSignalHandler(). 62310114Sandreas@sandberg.pp.se kick(); 6249655SAndreas.Sandberg@ARM.com 62510114Sandreas@sandberg.pp.se // Start the vCPU. KVM will check for signals after completing 62610114Sandreas@sandberg.pp.se // pending operations (IO). Since the KVM_KICK_SIGNAL is 62710114Sandreas@sandberg.pp.se // pending, this forces an immediate exit to gem5 again. We 6289753Sandreas@sandberg.pp.se // don't bother to setup timers since this shouldn't actually 62910114Sandreas@sandberg.pp.se // execute any code (other than completing half-executed IO 63010114Sandreas@sandberg.pp.se // instructions) in the guest. 6319753Sandreas@sandberg.pp.se ioctlRun(); 6329753Sandreas@sandberg.pp.se 6339753Sandreas@sandberg.pp.se // We always execute at least one cycle to prevent the 6349753Sandreas@sandberg.pp.se // BaseKvmCPU::tick() to be rescheduled on the same tick 6359753Sandreas@sandberg.pp.se // twice. 6369753Sandreas@sandberg.pp.se ticksExecuted = clockPeriod(); 6379753Sandreas@sandberg.pp.se } else { 6389753Sandreas@sandberg.pp.se if (ticks < runTimer->resolution()) { 6399753Sandreas@sandberg.pp.se DPRINTF(KvmRun, "KVM: Adjusting tick count (%i -> %i)\n", 6409753Sandreas@sandberg.pp.se ticks, runTimer->resolution()); 6419753Sandreas@sandberg.pp.se ticks = runTimer->resolution(); 6429753Sandreas@sandberg.pp.se } 6439753Sandreas@sandberg.pp.se 6449753Sandreas@sandberg.pp.se // Get hardware statistics after synchronizing contexts. The KVM 6459753Sandreas@sandberg.pp.se // state update might affect guest cycle counters. 6469753Sandreas@sandberg.pp.se uint64_t baseCycles(getHostCycles()); 6479753Sandreas@sandberg.pp.se uint64_t baseInstrs(hwInstructions.read()); 6489753Sandreas@sandberg.pp.se 6499753Sandreas@sandberg.pp.se // Arm the run timer and start the cycle timer if it isn't 6509753Sandreas@sandberg.pp.se // controlled by the overflow timer. Starting/stopping the cycle 6519753Sandreas@sandberg.pp.se // timer automatically starts the other perf timers as they are in 6529753Sandreas@sandberg.pp.se // the same counter group. 6539753Sandreas@sandberg.pp.se runTimer->arm(ticks); 6549753Sandreas@sandberg.pp.se if (!perfControlledByTimer) 6559753Sandreas@sandberg.pp.se hwCycles.start(); 6569753Sandreas@sandberg.pp.se 6579753Sandreas@sandberg.pp.se ioctlRun(); 6589753Sandreas@sandberg.pp.se 6599753Sandreas@sandberg.pp.se runTimer->disarm(); 6609753Sandreas@sandberg.pp.se if (!perfControlledByTimer) 6619753Sandreas@sandberg.pp.se hwCycles.stop(); 6629753Sandreas@sandberg.pp.se 66310114Sandreas@sandberg.pp.se // The control signal may have been delivered after we exited 6649753Sandreas@sandberg.pp.se // from KVM. It will be pending in that case since it is 6659753Sandreas@sandberg.pp.se // masked when we aren't executing in KVM. Discard it to make 6669753Sandreas@sandberg.pp.se // sure we don't deliver it immediately next time we try to 6679753Sandreas@sandberg.pp.se // enter into KVM. 66810114Sandreas@sandberg.pp.se discardPendingSignal(KVM_KICK_SIGNAL); 6699753Sandreas@sandberg.pp.se 6709753Sandreas@sandberg.pp.se const uint64_t hostCyclesExecuted(getHostCycles() - baseCycles); 6719753Sandreas@sandberg.pp.se const uint64_t simCyclesExecuted(hostCyclesExecuted * hostFactor); 6729753Sandreas@sandberg.pp.se const uint64_t instsExecuted(hwInstructions.read() - baseInstrs); 6739753Sandreas@sandberg.pp.se ticksExecuted = runTimer->ticksFromHostCycles(hostCyclesExecuted); 6749753Sandreas@sandberg.pp.se 6759753Sandreas@sandberg.pp.se /* Update statistics */ 6769753Sandreas@sandberg.pp.se numCycles += simCyclesExecuted;; 6779753Sandreas@sandberg.pp.se numInsts += instsExecuted; 6789753Sandreas@sandberg.pp.se ctrInsts += instsExecuted; 6799753Sandreas@sandberg.pp.se system->totalNumInsts += instsExecuted; 6809753Sandreas@sandberg.pp.se 6819753Sandreas@sandberg.pp.se DPRINTF(KvmRun, 6829753Sandreas@sandberg.pp.se "KVM: Executed %i instructions in %i cycles " 6839753Sandreas@sandberg.pp.se "(%i ticks, sim cycles: %i).\n", 6849753Sandreas@sandberg.pp.se instsExecuted, hostCyclesExecuted, ticksExecuted, simCyclesExecuted); 6859651SAndreas.Sandberg@ARM.com } 6869655SAndreas.Sandberg@ARM.com 6879651SAndreas.Sandberg@ARM.com ++numVMExits; 6889651SAndreas.Sandberg@ARM.com 6899651SAndreas.Sandberg@ARM.com return ticksExecuted + flushCoalescedMMIO(); 6909651SAndreas.Sandberg@ARM.com} 6919651SAndreas.Sandberg@ARM.com 6929651SAndreas.Sandberg@ARM.comvoid 6939651SAndreas.Sandberg@ARM.comBaseKvmCPU::kvmNonMaskableInterrupt() 6949651SAndreas.Sandberg@ARM.com{ 6959651SAndreas.Sandberg@ARM.com ++numInterrupts; 6969651SAndreas.Sandberg@ARM.com if (ioctl(KVM_NMI) == -1) 6979651SAndreas.Sandberg@ARM.com panic("KVM: Failed to deliver NMI to virtual CPU\n"); 6989651SAndreas.Sandberg@ARM.com} 6999651SAndreas.Sandberg@ARM.com 7009651SAndreas.Sandberg@ARM.comvoid 7019651SAndreas.Sandberg@ARM.comBaseKvmCPU::kvmInterrupt(const struct kvm_interrupt &interrupt) 7029651SAndreas.Sandberg@ARM.com{ 7039651SAndreas.Sandberg@ARM.com ++numInterrupts; 7049651SAndreas.Sandberg@ARM.com if (ioctl(KVM_INTERRUPT, (void *)&interrupt) == -1) 7059651SAndreas.Sandberg@ARM.com panic("KVM: Failed to deliver interrupt to virtual CPU\n"); 7069651SAndreas.Sandberg@ARM.com} 7079651SAndreas.Sandberg@ARM.com 7089651SAndreas.Sandberg@ARM.comvoid 7099651SAndreas.Sandberg@ARM.comBaseKvmCPU::getRegisters(struct kvm_regs ®s) const 7109651SAndreas.Sandberg@ARM.com{ 7119651SAndreas.Sandberg@ARM.com if (ioctl(KVM_GET_REGS, ®s) == -1) 7129651SAndreas.Sandberg@ARM.com panic("KVM: Failed to get guest registers\n"); 7139651SAndreas.Sandberg@ARM.com} 7149651SAndreas.Sandberg@ARM.com 7159651SAndreas.Sandberg@ARM.comvoid 7169651SAndreas.Sandberg@ARM.comBaseKvmCPU::setRegisters(const struct kvm_regs ®s) 7179651SAndreas.Sandberg@ARM.com{ 7189651SAndreas.Sandberg@ARM.com if (ioctl(KVM_SET_REGS, (void *)®s) == -1) 7199651SAndreas.Sandberg@ARM.com panic("KVM: Failed to set guest registers\n"); 7209651SAndreas.Sandberg@ARM.com} 7219651SAndreas.Sandberg@ARM.com 7229651SAndreas.Sandberg@ARM.comvoid 7239651SAndreas.Sandberg@ARM.comBaseKvmCPU::getSpecialRegisters(struct kvm_sregs ®s) const 7249651SAndreas.Sandberg@ARM.com{ 7259651SAndreas.Sandberg@ARM.com if (ioctl(KVM_GET_SREGS, ®s) == -1) 7269651SAndreas.Sandberg@ARM.com panic("KVM: Failed to get guest special registers\n"); 7279651SAndreas.Sandberg@ARM.com} 7289651SAndreas.Sandberg@ARM.com 7299651SAndreas.Sandberg@ARM.comvoid 7309651SAndreas.Sandberg@ARM.comBaseKvmCPU::setSpecialRegisters(const struct kvm_sregs ®s) 7319651SAndreas.Sandberg@ARM.com{ 7329651SAndreas.Sandberg@ARM.com if (ioctl(KVM_SET_SREGS, (void *)®s) == -1) 7339651SAndreas.Sandberg@ARM.com panic("KVM: Failed to set guest special registers\n"); 7349651SAndreas.Sandberg@ARM.com} 7359651SAndreas.Sandberg@ARM.com 7369651SAndreas.Sandberg@ARM.comvoid 7379651SAndreas.Sandberg@ARM.comBaseKvmCPU::getFPUState(struct kvm_fpu &state) const 7389651SAndreas.Sandberg@ARM.com{ 7399651SAndreas.Sandberg@ARM.com if (ioctl(KVM_GET_FPU, &state) == -1) 7409651SAndreas.Sandberg@ARM.com panic("KVM: Failed to get guest FPU state\n"); 7419651SAndreas.Sandberg@ARM.com} 7429651SAndreas.Sandberg@ARM.com 7439651SAndreas.Sandberg@ARM.comvoid 7449651SAndreas.Sandberg@ARM.comBaseKvmCPU::setFPUState(const struct kvm_fpu &state) 7459651SAndreas.Sandberg@ARM.com{ 7469651SAndreas.Sandberg@ARM.com if (ioctl(KVM_SET_FPU, (void *)&state) == -1) 7479651SAndreas.Sandberg@ARM.com panic("KVM: Failed to set guest FPU state\n"); 7489651SAndreas.Sandberg@ARM.com} 7499651SAndreas.Sandberg@ARM.com 7509651SAndreas.Sandberg@ARM.com 7519651SAndreas.Sandberg@ARM.comvoid 7529651SAndreas.Sandberg@ARM.comBaseKvmCPU::setOneReg(uint64_t id, const void *addr) 7539651SAndreas.Sandberg@ARM.com{ 7549651SAndreas.Sandberg@ARM.com#ifdef KVM_SET_ONE_REG 7559651SAndreas.Sandberg@ARM.com struct kvm_one_reg reg; 7569651SAndreas.Sandberg@ARM.com reg.id = id; 7579651SAndreas.Sandberg@ARM.com reg.addr = (uint64_t)addr; 7589651SAndreas.Sandberg@ARM.com 7599651SAndreas.Sandberg@ARM.com if (ioctl(KVM_SET_ONE_REG, ®) == -1) { 7609651SAndreas.Sandberg@ARM.com panic("KVM: Failed to set register (0x%x) value (errno: %i)\n", 7619651SAndreas.Sandberg@ARM.com id, errno); 7629651SAndreas.Sandberg@ARM.com } 7639651SAndreas.Sandberg@ARM.com#else 7649651SAndreas.Sandberg@ARM.com panic("KVM_SET_ONE_REG is unsupported on this platform.\n"); 7659651SAndreas.Sandberg@ARM.com#endif 7669651SAndreas.Sandberg@ARM.com} 7679651SAndreas.Sandberg@ARM.com 7689651SAndreas.Sandberg@ARM.comvoid 7699651SAndreas.Sandberg@ARM.comBaseKvmCPU::getOneReg(uint64_t id, void *addr) const 7709651SAndreas.Sandberg@ARM.com{ 7719651SAndreas.Sandberg@ARM.com#ifdef KVM_GET_ONE_REG 7729651SAndreas.Sandberg@ARM.com struct kvm_one_reg reg; 7739651SAndreas.Sandberg@ARM.com reg.id = id; 7749651SAndreas.Sandberg@ARM.com reg.addr = (uint64_t)addr; 7759651SAndreas.Sandberg@ARM.com 7769651SAndreas.Sandberg@ARM.com if (ioctl(KVM_GET_ONE_REG, ®) == -1) { 7779651SAndreas.Sandberg@ARM.com panic("KVM: Failed to get register (0x%x) value (errno: %i)\n", 7789651SAndreas.Sandberg@ARM.com id, errno); 7799651SAndreas.Sandberg@ARM.com } 7809651SAndreas.Sandberg@ARM.com#else 7819651SAndreas.Sandberg@ARM.com panic("KVM_GET_ONE_REG is unsupported on this platform.\n"); 7829651SAndreas.Sandberg@ARM.com#endif 7839651SAndreas.Sandberg@ARM.com} 7849651SAndreas.Sandberg@ARM.com 7859651SAndreas.Sandberg@ARM.comstd::string 7869651SAndreas.Sandberg@ARM.comBaseKvmCPU::getAndFormatOneReg(uint64_t id) const 7879651SAndreas.Sandberg@ARM.com{ 7889651SAndreas.Sandberg@ARM.com#ifdef KVM_GET_ONE_REG 7899651SAndreas.Sandberg@ARM.com std::ostringstream ss; 7909651SAndreas.Sandberg@ARM.com 7919651SAndreas.Sandberg@ARM.com ss.setf(std::ios::hex, std::ios::basefield); 7929651SAndreas.Sandberg@ARM.com ss.setf(std::ios::showbase); 7939651SAndreas.Sandberg@ARM.com#define HANDLE_INTTYPE(len) \ 7949651SAndreas.Sandberg@ARM.com case KVM_REG_SIZE_U ## len: { \ 7959651SAndreas.Sandberg@ARM.com uint ## len ## _t value; \ 7969651SAndreas.Sandberg@ARM.com getOneReg(id, &value); \ 7979651SAndreas.Sandberg@ARM.com ss << value; \ 7989651SAndreas.Sandberg@ARM.com } break 7999651SAndreas.Sandberg@ARM.com 8009651SAndreas.Sandberg@ARM.com#define HANDLE_ARRAY(len) \ 8019651SAndreas.Sandberg@ARM.com case KVM_REG_SIZE_U ## len: { \ 8029651SAndreas.Sandberg@ARM.com uint8_t value[len / 8]; \ 8039651SAndreas.Sandberg@ARM.com getOneReg(id, value); \ 8049651SAndreas.Sandberg@ARM.com ss << "[" << value[0]; \ 8059651SAndreas.Sandberg@ARM.com for (int i = 1; i < len / 8; ++i) \ 8069651SAndreas.Sandberg@ARM.com ss << ", " << value[i]; \ 8079651SAndreas.Sandberg@ARM.com ss << "]"; \ 8089651SAndreas.Sandberg@ARM.com } break 8099651SAndreas.Sandberg@ARM.com 8109651SAndreas.Sandberg@ARM.com switch (id & KVM_REG_SIZE_MASK) { 8119651SAndreas.Sandberg@ARM.com HANDLE_INTTYPE(8); 8129651SAndreas.Sandberg@ARM.com HANDLE_INTTYPE(16); 8139651SAndreas.Sandberg@ARM.com HANDLE_INTTYPE(32); 8149651SAndreas.Sandberg@ARM.com HANDLE_INTTYPE(64); 8159651SAndreas.Sandberg@ARM.com HANDLE_ARRAY(128); 8169651SAndreas.Sandberg@ARM.com HANDLE_ARRAY(256); 8179651SAndreas.Sandberg@ARM.com HANDLE_ARRAY(512); 8189651SAndreas.Sandberg@ARM.com HANDLE_ARRAY(1024); 8199651SAndreas.Sandberg@ARM.com default: 8209651SAndreas.Sandberg@ARM.com ss << "??"; 8219651SAndreas.Sandberg@ARM.com } 8229651SAndreas.Sandberg@ARM.com 8239651SAndreas.Sandberg@ARM.com#undef HANDLE_INTTYPE 8249651SAndreas.Sandberg@ARM.com#undef HANDLE_ARRAY 8259651SAndreas.Sandberg@ARM.com 8269651SAndreas.Sandberg@ARM.com return ss.str(); 8279651SAndreas.Sandberg@ARM.com#else 8289651SAndreas.Sandberg@ARM.com panic("KVM_GET_ONE_REG is unsupported on this platform.\n"); 8299651SAndreas.Sandberg@ARM.com#endif 8309651SAndreas.Sandberg@ARM.com} 8319651SAndreas.Sandberg@ARM.com 8329652SAndreas.Sandberg@ARM.comvoid 8339652SAndreas.Sandberg@ARM.comBaseKvmCPU::syncThreadContext() 8349652SAndreas.Sandberg@ARM.com{ 8359652SAndreas.Sandberg@ARM.com if (!kvmStateDirty) 8369652SAndreas.Sandberg@ARM.com return; 8379652SAndreas.Sandberg@ARM.com 8389652SAndreas.Sandberg@ARM.com assert(!threadContextDirty); 8399652SAndreas.Sandberg@ARM.com 8409652SAndreas.Sandberg@ARM.com updateThreadContext(); 8419652SAndreas.Sandberg@ARM.com kvmStateDirty = false; 8429652SAndreas.Sandberg@ARM.com} 8439652SAndreas.Sandberg@ARM.com 8449652SAndreas.Sandberg@ARM.comvoid 8459652SAndreas.Sandberg@ARM.comBaseKvmCPU::syncKvmState() 8469652SAndreas.Sandberg@ARM.com{ 8479652SAndreas.Sandberg@ARM.com if (!threadContextDirty) 8489652SAndreas.Sandberg@ARM.com return; 8499652SAndreas.Sandberg@ARM.com 8509652SAndreas.Sandberg@ARM.com assert(!kvmStateDirty); 8519652SAndreas.Sandberg@ARM.com 8529652SAndreas.Sandberg@ARM.com updateKvmState(); 8539652SAndreas.Sandberg@ARM.com threadContextDirty = false; 8549652SAndreas.Sandberg@ARM.com} 8559652SAndreas.Sandberg@ARM.com 8569651SAndreas.Sandberg@ARM.comTick 8579651SAndreas.Sandberg@ARM.comBaseKvmCPU::handleKvmExit() 8589651SAndreas.Sandberg@ARM.com{ 8599651SAndreas.Sandberg@ARM.com DPRINTF(KvmRun, "handleKvmExit (exit_reason: %i)\n", _kvmRun->exit_reason); 8609753Sandreas@sandberg.pp.se assert(_status == RunningService); 8619651SAndreas.Sandberg@ARM.com 8629753Sandreas@sandberg.pp.se // Switch into the running state by default. Individual handlers 8639753Sandreas@sandberg.pp.se // can override this. 8649753Sandreas@sandberg.pp.se _status = Running; 8659651SAndreas.Sandberg@ARM.com switch (_kvmRun->exit_reason) { 8669651SAndreas.Sandberg@ARM.com case KVM_EXIT_UNKNOWN: 8679651SAndreas.Sandberg@ARM.com return handleKvmExitUnknown(); 8689651SAndreas.Sandberg@ARM.com 8699651SAndreas.Sandberg@ARM.com case KVM_EXIT_EXCEPTION: 8709651SAndreas.Sandberg@ARM.com return handleKvmExitException(); 8719651SAndreas.Sandberg@ARM.com 8729651SAndreas.Sandberg@ARM.com case KVM_EXIT_IO: 8739753Sandreas@sandberg.pp.se _status = RunningServiceCompletion; 8749651SAndreas.Sandberg@ARM.com ++numIO; 8759651SAndreas.Sandberg@ARM.com return handleKvmExitIO(); 8769651SAndreas.Sandberg@ARM.com 8779651SAndreas.Sandberg@ARM.com case KVM_EXIT_HYPERCALL: 8789651SAndreas.Sandberg@ARM.com ++numHypercalls; 8799651SAndreas.Sandberg@ARM.com return handleKvmExitHypercall(); 8809651SAndreas.Sandberg@ARM.com 8819651SAndreas.Sandberg@ARM.com case KVM_EXIT_HLT: 8829651SAndreas.Sandberg@ARM.com /* The guest has halted and is waiting for interrupts */ 8839651SAndreas.Sandberg@ARM.com DPRINTF(Kvm, "handleKvmExitHalt\n"); 8849651SAndreas.Sandberg@ARM.com ++numHalt; 8859651SAndreas.Sandberg@ARM.com 8869651SAndreas.Sandberg@ARM.com // Suspend the thread until the next interrupt arrives 8879651SAndreas.Sandberg@ARM.com thread->suspend(); 8889651SAndreas.Sandberg@ARM.com 8899651SAndreas.Sandberg@ARM.com // This is actually ignored since the thread is suspended. 8909651SAndreas.Sandberg@ARM.com return 0; 8919651SAndreas.Sandberg@ARM.com 8929651SAndreas.Sandberg@ARM.com case KVM_EXIT_MMIO: 8939753Sandreas@sandberg.pp.se _status = RunningServiceCompletion; 8949651SAndreas.Sandberg@ARM.com /* Service memory mapped IO requests */ 8959651SAndreas.Sandberg@ARM.com DPRINTF(KvmIO, "KVM: Handling MMIO (w: %u, addr: 0x%x, len: %u)\n", 8969651SAndreas.Sandberg@ARM.com _kvmRun->mmio.is_write, 8979651SAndreas.Sandberg@ARM.com _kvmRun->mmio.phys_addr, _kvmRun->mmio.len); 8989651SAndreas.Sandberg@ARM.com 8999651SAndreas.Sandberg@ARM.com ++numMMIO; 9009651SAndreas.Sandberg@ARM.com return doMMIOAccess(_kvmRun->mmio.phys_addr, _kvmRun->mmio.data, 9019651SAndreas.Sandberg@ARM.com _kvmRun->mmio.len, _kvmRun->mmio.is_write); 9029651SAndreas.Sandberg@ARM.com 9039651SAndreas.Sandberg@ARM.com case KVM_EXIT_IRQ_WINDOW_OPEN: 9049651SAndreas.Sandberg@ARM.com return handleKvmExitIRQWindowOpen(); 9059651SAndreas.Sandberg@ARM.com 9069651SAndreas.Sandberg@ARM.com case KVM_EXIT_FAIL_ENTRY: 9079651SAndreas.Sandberg@ARM.com return handleKvmExitFailEntry(); 9089651SAndreas.Sandberg@ARM.com 9099651SAndreas.Sandberg@ARM.com case KVM_EXIT_INTR: 9109651SAndreas.Sandberg@ARM.com /* KVM was interrupted by a signal, restart it in the next 9119651SAndreas.Sandberg@ARM.com * tick. */ 9129651SAndreas.Sandberg@ARM.com return 0; 9139651SAndreas.Sandberg@ARM.com 9149651SAndreas.Sandberg@ARM.com case KVM_EXIT_INTERNAL_ERROR: 9159651SAndreas.Sandberg@ARM.com panic("KVM: Internal error (suberror: %u)\n", 9169651SAndreas.Sandberg@ARM.com _kvmRun->internal.suberror); 9179651SAndreas.Sandberg@ARM.com 9189651SAndreas.Sandberg@ARM.com default: 9199689Sandreas@sandberg.pp.se dump(); 9209651SAndreas.Sandberg@ARM.com panic("KVM: Unexpected exit (exit_reason: %u)\n", _kvmRun->exit_reason); 9219651SAndreas.Sandberg@ARM.com } 9229651SAndreas.Sandberg@ARM.com} 9239651SAndreas.Sandberg@ARM.com 9249651SAndreas.Sandberg@ARM.comTick 9259651SAndreas.Sandberg@ARM.comBaseKvmCPU::handleKvmExitIO() 9269651SAndreas.Sandberg@ARM.com{ 9279651SAndreas.Sandberg@ARM.com panic("KVM: Unhandled guest IO (dir: %i, size: %i, port: 0x%x, count: %i)\n", 9289651SAndreas.Sandberg@ARM.com _kvmRun->io.direction, _kvmRun->io.size, 9299651SAndreas.Sandberg@ARM.com _kvmRun->io.port, _kvmRun->io.count); 9309651SAndreas.Sandberg@ARM.com} 9319651SAndreas.Sandberg@ARM.com 9329651SAndreas.Sandberg@ARM.comTick 9339651SAndreas.Sandberg@ARM.comBaseKvmCPU::handleKvmExitHypercall() 9349651SAndreas.Sandberg@ARM.com{ 9359651SAndreas.Sandberg@ARM.com panic("KVM: Unhandled hypercall\n"); 9369651SAndreas.Sandberg@ARM.com} 9379651SAndreas.Sandberg@ARM.com 9389651SAndreas.Sandberg@ARM.comTick 9399651SAndreas.Sandberg@ARM.comBaseKvmCPU::handleKvmExitIRQWindowOpen() 9409651SAndreas.Sandberg@ARM.com{ 9419651SAndreas.Sandberg@ARM.com warn("KVM: Unhandled IRQ window.\n"); 9429651SAndreas.Sandberg@ARM.com return 0; 9439651SAndreas.Sandberg@ARM.com} 9449651SAndreas.Sandberg@ARM.com 9459651SAndreas.Sandberg@ARM.com 9469651SAndreas.Sandberg@ARM.comTick 9479651SAndreas.Sandberg@ARM.comBaseKvmCPU::handleKvmExitUnknown() 9489651SAndreas.Sandberg@ARM.com{ 9499689Sandreas@sandberg.pp.se dump(); 9509651SAndreas.Sandberg@ARM.com panic("KVM: Unknown error when starting vCPU (hw reason: 0x%llx)\n", 9519651SAndreas.Sandberg@ARM.com _kvmRun->hw.hardware_exit_reason); 9529651SAndreas.Sandberg@ARM.com} 9539651SAndreas.Sandberg@ARM.com 9549651SAndreas.Sandberg@ARM.comTick 9559651SAndreas.Sandberg@ARM.comBaseKvmCPU::handleKvmExitException() 9569651SAndreas.Sandberg@ARM.com{ 9579689Sandreas@sandberg.pp.se dump(); 9589651SAndreas.Sandberg@ARM.com panic("KVM: Got exception when starting vCPU " 9599651SAndreas.Sandberg@ARM.com "(exception: %u, error_code: %u)\n", 9609651SAndreas.Sandberg@ARM.com _kvmRun->ex.exception, _kvmRun->ex.error_code); 9619651SAndreas.Sandberg@ARM.com} 9629651SAndreas.Sandberg@ARM.com 9639651SAndreas.Sandberg@ARM.comTick 9649651SAndreas.Sandberg@ARM.comBaseKvmCPU::handleKvmExitFailEntry() 9659651SAndreas.Sandberg@ARM.com{ 9669689Sandreas@sandberg.pp.se dump(); 9679651SAndreas.Sandberg@ARM.com panic("KVM: Failed to enter virtualized mode (hw reason: 0x%llx)\n", 9689651SAndreas.Sandberg@ARM.com _kvmRun->fail_entry.hardware_entry_failure_reason); 9699651SAndreas.Sandberg@ARM.com} 9709651SAndreas.Sandberg@ARM.com 9719651SAndreas.Sandberg@ARM.comTick 9729651SAndreas.Sandberg@ARM.comBaseKvmCPU::doMMIOAccess(Addr paddr, void *data, int size, bool write) 9739651SAndreas.Sandberg@ARM.com{ 9749760Sandreas@sandberg.pp.se ThreadContext *tc(thread->getTC()); 9759760Sandreas@sandberg.pp.se syncThreadContext(); 9769760Sandreas@sandberg.pp.se 9779682Sandreas@sandberg.pp.se mmio_req.setPhys(paddr, size, Request::UNCACHEABLE, dataMasterId()); 9789760Sandreas@sandberg.pp.se // Some architectures do need to massage physical addresses a bit 9799760Sandreas@sandberg.pp.se // before they are inserted into the memory system. This enables 9809760Sandreas@sandberg.pp.se // APIC accesses on x86 and m5ops where supported through a MMIO 9819760Sandreas@sandberg.pp.se // interface. 9829760Sandreas@sandberg.pp.se BaseTLB::Mode tlb_mode(write ? BaseTLB::Write : BaseTLB::Read); 9839760Sandreas@sandberg.pp.se Fault fault(tc->getDTBPtr()->finalizePhysical(&mmio_req, tc, tlb_mode)); 9849760Sandreas@sandberg.pp.se if (fault != NoFault) 9859760Sandreas@sandberg.pp.se warn("Finalization of MMIO address failed: %s\n", fault->name()); 9869760Sandreas@sandberg.pp.se 9879651SAndreas.Sandberg@ARM.com 9889651SAndreas.Sandberg@ARM.com const MemCmd cmd(write ? MemCmd::WriteReq : MemCmd::ReadReq); 9899651SAndreas.Sandberg@ARM.com Packet pkt(&mmio_req, cmd); 9909651SAndreas.Sandberg@ARM.com pkt.dataStatic(data); 9919760Sandreas@sandberg.pp.se 9929760Sandreas@sandberg.pp.se if (mmio_req.isMmappedIpr()) { 9939882Sandreas@sandberg.pp.se const Cycles ipr_delay(write ? 9949882Sandreas@sandberg.pp.se TheISA::handleIprWrite(tc, &pkt) : 9959882Sandreas@sandberg.pp.se TheISA::handleIprRead(tc, &pkt)); 9969925Sandreas@sandberg.pp.se return clockPeriod() * ipr_delay; 9979760Sandreas@sandberg.pp.se } else { 9989760Sandreas@sandberg.pp.se return dataPort.sendAtomic(&pkt); 9999760Sandreas@sandberg.pp.se } 10009651SAndreas.Sandberg@ARM.com} 10019651SAndreas.Sandberg@ARM.com 10029753Sandreas@sandberg.pp.sevoid 10039753Sandreas@sandberg.pp.seBaseKvmCPU::setSignalMask(const sigset_t *mask) 10049753Sandreas@sandberg.pp.se{ 10059753Sandreas@sandberg.pp.se std::unique_ptr<struct kvm_signal_mask> kvm_mask; 10069753Sandreas@sandberg.pp.se 10079753Sandreas@sandberg.pp.se if (mask) { 10089753Sandreas@sandberg.pp.se kvm_mask.reset((struct kvm_signal_mask *)operator new( 10099753Sandreas@sandberg.pp.se sizeof(struct kvm_signal_mask) + sizeof(*mask))); 10109753Sandreas@sandberg.pp.se // The kernel and the user-space headers have different ideas 10119753Sandreas@sandberg.pp.se // about the size of sigset_t. This seems like a massive hack, 10129753Sandreas@sandberg.pp.se // but is actually what qemu does. 10139753Sandreas@sandberg.pp.se assert(sizeof(*mask) >= 8); 10149753Sandreas@sandberg.pp.se kvm_mask->len = 8; 10159753Sandreas@sandberg.pp.se memcpy(kvm_mask->sigset, mask, kvm_mask->len); 10169753Sandreas@sandberg.pp.se } 10179753Sandreas@sandberg.pp.se 10189753Sandreas@sandberg.pp.se if (ioctl(KVM_SET_SIGNAL_MASK, (void *)kvm_mask.get()) == -1) 10199753Sandreas@sandberg.pp.se panic("KVM: Failed to set vCPU signal mask (errno: %i)\n", 10209753Sandreas@sandberg.pp.se errno); 10219753Sandreas@sandberg.pp.se} 10229753Sandreas@sandberg.pp.se 10239651SAndreas.Sandberg@ARM.comint 10249651SAndreas.Sandberg@ARM.comBaseKvmCPU::ioctl(int request, long p1) const 10259651SAndreas.Sandberg@ARM.com{ 10269651SAndreas.Sandberg@ARM.com if (vcpuFD == -1) 10279651SAndreas.Sandberg@ARM.com panic("KVM: CPU ioctl called before initialization\n"); 10289651SAndreas.Sandberg@ARM.com 10299651SAndreas.Sandberg@ARM.com return ::ioctl(vcpuFD, request, p1); 10309651SAndreas.Sandberg@ARM.com} 10319651SAndreas.Sandberg@ARM.com 10329651SAndreas.Sandberg@ARM.comTick 10339651SAndreas.Sandberg@ARM.comBaseKvmCPU::flushCoalescedMMIO() 10349651SAndreas.Sandberg@ARM.com{ 10359651SAndreas.Sandberg@ARM.com if (!mmioRing) 10369651SAndreas.Sandberg@ARM.com return 0; 10379651SAndreas.Sandberg@ARM.com 10389651SAndreas.Sandberg@ARM.com DPRINTF(KvmIO, "KVM: Flushing the coalesced MMIO ring buffer\n"); 10399651SAndreas.Sandberg@ARM.com 10409651SAndreas.Sandberg@ARM.com // TODO: We might need to do synchronization when we start to 10419651SAndreas.Sandberg@ARM.com // support multiple CPUs 10429651SAndreas.Sandberg@ARM.com Tick ticks(0); 10439651SAndreas.Sandberg@ARM.com while (mmioRing->first != mmioRing->last) { 10449651SAndreas.Sandberg@ARM.com struct kvm_coalesced_mmio &ent( 10459651SAndreas.Sandberg@ARM.com mmioRing->coalesced_mmio[mmioRing->first]); 10469651SAndreas.Sandberg@ARM.com 10479651SAndreas.Sandberg@ARM.com DPRINTF(KvmIO, "KVM: Handling coalesced MMIO (addr: 0x%x, len: %u)\n", 10489651SAndreas.Sandberg@ARM.com ent.phys_addr, ent.len); 10499651SAndreas.Sandberg@ARM.com 10509651SAndreas.Sandberg@ARM.com ++numCoalescedMMIO; 10519651SAndreas.Sandberg@ARM.com ticks += doMMIOAccess(ent.phys_addr, ent.data, ent.len, true); 10529651SAndreas.Sandberg@ARM.com 10539651SAndreas.Sandberg@ARM.com mmioRing->first = (mmioRing->first + 1) % KVM_COALESCED_MMIO_MAX; 10549651SAndreas.Sandberg@ARM.com } 10559651SAndreas.Sandberg@ARM.com 10569651SAndreas.Sandberg@ARM.com return ticks; 10579651SAndreas.Sandberg@ARM.com} 10589651SAndreas.Sandberg@ARM.com 10599892Sandreas@sandberg.pp.se/** 106010114Sandreas@sandberg.pp.se * Dummy handler for KVM kick signals. 106110073Sandreas@sandberg.pp.se * 106210114Sandreas@sandberg.pp.se * @note This function is usually not called since the kernel doesn't 106310073Sandreas@sandberg.pp.se * seem to deliver signals when the signal is only unmasked when 106410073Sandreas@sandberg.pp.se * running in KVM. This doesn't matter though since we are only 106510073Sandreas@sandberg.pp.se * interested in getting KVM to exit, which happens as expected. See 106610073Sandreas@sandberg.pp.se * setupSignalHandler() and kvmRun() for details about KVM signal 106710073Sandreas@sandberg.pp.se * handling. 10689892Sandreas@sandberg.pp.se */ 10699892Sandreas@sandberg.pp.sestatic void 107010114Sandreas@sandberg.pp.seonKickSignal(int signo, siginfo_t *si, void *data) 10719892Sandreas@sandberg.pp.se{ 10729892Sandreas@sandberg.pp.se} 10739892Sandreas@sandberg.pp.se 10749651SAndreas.Sandberg@ARM.comvoid 10759651SAndreas.Sandberg@ARM.comBaseKvmCPU::setupSignalHandler() 10769651SAndreas.Sandberg@ARM.com{ 10779651SAndreas.Sandberg@ARM.com struct sigaction sa; 10789651SAndreas.Sandberg@ARM.com 10799651SAndreas.Sandberg@ARM.com memset(&sa, 0, sizeof(sa)); 108010114Sandreas@sandberg.pp.se sa.sa_sigaction = onKickSignal; 10819651SAndreas.Sandberg@ARM.com sa.sa_flags = SA_SIGINFO | SA_RESTART; 108210114Sandreas@sandberg.pp.se if (sigaction(KVM_KICK_SIGNAL, &sa, NULL) == -1) 10839892Sandreas@sandberg.pp.se panic("KVM: Failed to setup vCPU timer signal handler\n"); 10849892Sandreas@sandberg.pp.se 10859753Sandreas@sandberg.pp.se sigset_t sigset; 108610073Sandreas@sandberg.pp.se if (pthread_sigmask(SIG_BLOCK, NULL, &sigset) == -1) 10879753Sandreas@sandberg.pp.se panic("KVM: Failed get signal mask\n"); 10889753Sandreas@sandberg.pp.se 10899753Sandreas@sandberg.pp.se // Request KVM to setup the same signal mask as we're currently 109010114Sandreas@sandberg.pp.se // running with except for the KVM control signal. We'll sometimes 109110114Sandreas@sandberg.pp.se // need to raise the KVM_KICK_SIGNAL to cause immediate exits from 109210114Sandreas@sandberg.pp.se // KVM after servicing IO requests. See kvmRun(). 109310114Sandreas@sandberg.pp.se sigdelset(&sigset, KVM_KICK_SIGNAL); 10949753Sandreas@sandberg.pp.se setSignalMask(&sigset); 10959753Sandreas@sandberg.pp.se 10969892Sandreas@sandberg.pp.se // Mask our control signals so they aren't delivered unless we're 10979753Sandreas@sandberg.pp.se // actually executing inside KVM. 109810114Sandreas@sandberg.pp.se sigaddset(&sigset, KVM_KICK_SIGNAL); 109910073Sandreas@sandberg.pp.se if (pthread_sigmask(SIG_SETMASK, &sigset, NULL) == -1) 11009892Sandreas@sandberg.pp.se panic("KVM: Failed mask the KVM control signals\n"); 11019753Sandreas@sandberg.pp.se} 11029753Sandreas@sandberg.pp.se 11039753Sandreas@sandberg.pp.sebool 11049753Sandreas@sandberg.pp.seBaseKvmCPU::discardPendingSignal(int signum) const 11059753Sandreas@sandberg.pp.se{ 11069753Sandreas@sandberg.pp.se int discardedSignal; 11079753Sandreas@sandberg.pp.se 11089753Sandreas@sandberg.pp.se // Setting the timeout to zero causes sigtimedwait to return 11099753Sandreas@sandberg.pp.se // immediately. 11109753Sandreas@sandberg.pp.se struct timespec timeout; 11119753Sandreas@sandberg.pp.se timeout.tv_sec = 0; 11129753Sandreas@sandberg.pp.se timeout.tv_nsec = 0; 11139753Sandreas@sandberg.pp.se 11149753Sandreas@sandberg.pp.se sigset_t sigset; 11159753Sandreas@sandberg.pp.se sigemptyset(&sigset); 11169753Sandreas@sandberg.pp.se sigaddset(&sigset, signum); 11179753Sandreas@sandberg.pp.se 11189753Sandreas@sandberg.pp.se do { 11199753Sandreas@sandberg.pp.se discardedSignal = sigtimedwait(&sigset, NULL, &timeout); 11209753Sandreas@sandberg.pp.se } while (discardedSignal == -1 && errno == EINTR); 11219753Sandreas@sandberg.pp.se 11229753Sandreas@sandberg.pp.se if (discardedSignal == signum) 11239753Sandreas@sandberg.pp.se return true; 11249753Sandreas@sandberg.pp.se else if (discardedSignal == -1 && errno == EAGAIN) 11259753Sandreas@sandberg.pp.se return false; 11269753Sandreas@sandberg.pp.se else 11279753Sandreas@sandberg.pp.se panic("Unexpected return value from sigtimedwait: %i (errno: %i)\n", 11289753Sandreas@sandberg.pp.se discardedSignal, errno); 11299651SAndreas.Sandberg@ARM.com} 11309651SAndreas.Sandberg@ARM.com 11319651SAndreas.Sandberg@ARM.comvoid 11329651SAndreas.Sandberg@ARM.comBaseKvmCPU::setupCounters() 11339651SAndreas.Sandberg@ARM.com{ 11349651SAndreas.Sandberg@ARM.com DPRINTF(Kvm, "Attaching cycle counter...\n"); 11359651SAndreas.Sandberg@ARM.com PerfKvmCounterConfig cfgCycles(PERF_TYPE_HARDWARE, 11369651SAndreas.Sandberg@ARM.com PERF_COUNT_HW_CPU_CYCLES); 11379651SAndreas.Sandberg@ARM.com cfgCycles.disabled(true) 11389651SAndreas.Sandberg@ARM.com .pinned(true); 11399655SAndreas.Sandberg@ARM.com 11409986Sandreas@sandberg.pp.se // Try to exclude the host. We set both exclude_hv and 11419986Sandreas@sandberg.pp.se // exclude_host since different architectures use slightly 11429986Sandreas@sandberg.pp.se // different APIs in the kernel. 11439986Sandreas@sandberg.pp.se cfgCycles.exclude_hv(true) 11449986Sandreas@sandberg.pp.se .exclude_host(true); 11459986Sandreas@sandberg.pp.se 11469655SAndreas.Sandberg@ARM.com if (perfControlledByTimer) { 11479655SAndreas.Sandberg@ARM.com // We need to configure the cycles counter to send overflows 11489655SAndreas.Sandberg@ARM.com // since we are going to use it to trigger timer signals that 11499655SAndreas.Sandberg@ARM.com // trap back into m5 from KVM. In practice, this means that we 11509655SAndreas.Sandberg@ARM.com // need to set some non-zero sample period that gets 11519655SAndreas.Sandberg@ARM.com // overridden when the timer is armed. 11529655SAndreas.Sandberg@ARM.com cfgCycles.wakeupEvents(1) 11539655SAndreas.Sandberg@ARM.com .samplePeriod(42); 11549655SAndreas.Sandberg@ARM.com } 11559655SAndreas.Sandberg@ARM.com 11569651SAndreas.Sandberg@ARM.com hwCycles.attach(cfgCycles, 11579651SAndreas.Sandberg@ARM.com 0); // TID (0 => currentThread) 11589651SAndreas.Sandberg@ARM.com 11599892Sandreas@sandberg.pp.se setupInstCounter(); 11609651SAndreas.Sandberg@ARM.com} 11619753Sandreas@sandberg.pp.se 11629753Sandreas@sandberg.pp.sebool 11639753Sandreas@sandberg.pp.seBaseKvmCPU::tryDrain() 11649753Sandreas@sandberg.pp.se{ 11659753Sandreas@sandberg.pp.se if (!drainManager) 11669753Sandreas@sandberg.pp.se return false; 11679753Sandreas@sandberg.pp.se 11689753Sandreas@sandberg.pp.se if (!archIsDrained()) { 11699753Sandreas@sandberg.pp.se DPRINTF(Drain, "tryDrain: Architecture code is not ready.\n"); 11709753Sandreas@sandberg.pp.se return false; 11719753Sandreas@sandberg.pp.se } 11729753Sandreas@sandberg.pp.se 11739753Sandreas@sandberg.pp.se if (_status == Idle || _status == Running) { 11749753Sandreas@sandberg.pp.se DPRINTF(Drain, 11759753Sandreas@sandberg.pp.se "tryDrain: CPU transitioned into the Idle state, drain done\n"); 11769753Sandreas@sandberg.pp.se drainManager->signalDrainDone(); 11779753Sandreas@sandberg.pp.se drainManager = NULL; 11789753Sandreas@sandberg.pp.se return true; 11799753Sandreas@sandberg.pp.se } else { 11809753Sandreas@sandberg.pp.se DPRINTF(Drain, "tryDrain: CPU not ready.\n"); 11819753Sandreas@sandberg.pp.se return false; 11829753Sandreas@sandberg.pp.se } 11839753Sandreas@sandberg.pp.se} 11849753Sandreas@sandberg.pp.se 11859753Sandreas@sandberg.pp.sevoid 11869753Sandreas@sandberg.pp.seBaseKvmCPU::ioctlRun() 11879753Sandreas@sandberg.pp.se{ 11889753Sandreas@sandberg.pp.se if (ioctl(KVM_RUN) == -1) { 11899753Sandreas@sandberg.pp.se if (errno != EINTR) 11909753Sandreas@sandberg.pp.se panic("KVM: Failed to start virtual CPU (errno: %i)\n", 11919753Sandreas@sandberg.pp.se errno); 11929753Sandreas@sandberg.pp.se } 11939753Sandreas@sandberg.pp.se} 11949892Sandreas@sandberg.pp.se 11959892Sandreas@sandberg.pp.sevoid 11969892Sandreas@sandberg.pp.seBaseKvmCPU::setupInstStop() 11979892Sandreas@sandberg.pp.se{ 11989892Sandreas@sandberg.pp.se if (comInstEventQueue[0]->empty()) { 11999892Sandreas@sandberg.pp.se setupInstCounter(0); 12009892Sandreas@sandberg.pp.se } else { 12019892Sandreas@sandberg.pp.se const uint64_t next(comInstEventQueue[0]->nextTick()); 12029892Sandreas@sandberg.pp.se 12039892Sandreas@sandberg.pp.se assert(next > ctrInsts); 12049892Sandreas@sandberg.pp.se setupInstCounter(next - ctrInsts); 12059892Sandreas@sandberg.pp.se } 12069892Sandreas@sandberg.pp.se} 12079892Sandreas@sandberg.pp.se 12089892Sandreas@sandberg.pp.sevoid 12099892Sandreas@sandberg.pp.seBaseKvmCPU::setupInstCounter(uint64_t period) 12109892Sandreas@sandberg.pp.se{ 12119892Sandreas@sandberg.pp.se // No need to do anything if we aren't attaching for the first 12129892Sandreas@sandberg.pp.se // time or the period isn't changing. 12139892Sandreas@sandberg.pp.se if (period == activeInstPeriod && hwInstructions.attached()) 12149892Sandreas@sandberg.pp.se return; 12159892Sandreas@sandberg.pp.se 12169892Sandreas@sandberg.pp.se PerfKvmCounterConfig cfgInstructions(PERF_TYPE_HARDWARE, 12179892Sandreas@sandberg.pp.se PERF_COUNT_HW_INSTRUCTIONS); 12189892Sandreas@sandberg.pp.se 12199986Sandreas@sandberg.pp.se // Try to exclude the host. We set both exclude_hv and 12209986Sandreas@sandberg.pp.se // exclude_host since different architectures use slightly 12219986Sandreas@sandberg.pp.se // different APIs in the kernel. 12229986Sandreas@sandberg.pp.se cfgInstructions.exclude_hv(true) 12239986Sandreas@sandberg.pp.se .exclude_host(true); 12249986Sandreas@sandberg.pp.se 12259892Sandreas@sandberg.pp.se if (period) { 12269892Sandreas@sandberg.pp.se // Setup a sampling counter if that has been requested. 12279892Sandreas@sandberg.pp.se cfgInstructions.wakeupEvents(1) 12289892Sandreas@sandberg.pp.se .samplePeriod(period); 12299892Sandreas@sandberg.pp.se } 12309892Sandreas@sandberg.pp.se 12319892Sandreas@sandberg.pp.se // We need to detach and re-attach the counter to reliably change 12329892Sandreas@sandberg.pp.se // sampling settings. See PerfKvmCounter::period() for details. 12339892Sandreas@sandberg.pp.se if (hwInstructions.attached()) 12349892Sandreas@sandberg.pp.se hwInstructions.detach(); 12359892Sandreas@sandberg.pp.se assert(hwCycles.attached()); 12369892Sandreas@sandberg.pp.se hwInstructions.attach(cfgInstructions, 12379892Sandreas@sandberg.pp.se 0, // TID (0 => currentThread) 12389892Sandreas@sandberg.pp.se hwCycles); 12399892Sandreas@sandberg.pp.se 12409892Sandreas@sandberg.pp.se if (period) 124110114Sandreas@sandberg.pp.se hwInstructions.enableSignals(KVM_KICK_SIGNAL); 12429892Sandreas@sandberg.pp.se 12439892Sandreas@sandberg.pp.se activeInstPeriod = period; 12449892Sandreas@sandberg.pp.se} 1245