base.cc revision 12085
19651SAndreas.Sandberg@ARM.com/* 210858Sandreas.sandberg@arm.com * Copyright (c) 2012, 2015 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 4011793Sbrandon.potter@amd.com#include "cpu/kvm/base.hh" 4111793Sbrandon.potter@amd.com 429651SAndreas.Sandberg@ARM.com#include <linux/kvm.h> 439651SAndreas.Sandberg@ARM.com#include <sys/ioctl.h> 449651SAndreas.Sandberg@ARM.com#include <sys/mman.h> 459651SAndreas.Sandberg@ARM.com#include <unistd.h> 469651SAndreas.Sandberg@ARM.com 479651SAndreas.Sandberg@ARM.com#include <cerrno> 489651SAndreas.Sandberg@ARM.com#include <csignal> 499651SAndreas.Sandberg@ARM.com#include <ostream> 509651SAndreas.Sandberg@ARM.com 519760Sandreas@sandberg.pp.se#include "arch/mmapped_ipr.hh" 529651SAndreas.Sandberg@ARM.com#include "arch/utility.hh" 539683Sandreas@sandberg.pp.se#include "debug/Checkpoint.hh" 549753Sandreas@sandberg.pp.se#include "debug/Drain.hh" 559651SAndreas.Sandberg@ARM.com#include "debug/Kvm.hh" 569651SAndreas.Sandberg@ARM.com#include "debug/KvmIO.hh" 579651SAndreas.Sandberg@ARM.com#include "debug/KvmRun.hh" 589651SAndreas.Sandberg@ARM.com#include "params/BaseKvmCPU.hh" 599651SAndreas.Sandberg@ARM.com#include "sim/process.hh" 609651SAndreas.Sandberg@ARM.com#include "sim/system.hh" 619651SAndreas.Sandberg@ARM.com 629651SAndreas.Sandberg@ARM.com/* Used by some KVM macros */ 639651SAndreas.Sandberg@ARM.com#define PAGE_SIZE pageSize 649651SAndreas.Sandberg@ARM.com 659651SAndreas.Sandberg@ARM.comBaseKvmCPU::BaseKvmCPU(BaseKvmCPUParams *params) 669651SAndreas.Sandberg@ARM.com : BaseCPU(params), 6711839SCurtis.Dunham@arm.com vm(*params->system->getKvmVM()), 689651SAndreas.Sandberg@ARM.com _status(Idle), 699651SAndreas.Sandberg@ARM.com dataPort(name() + ".dcache_port", this), 709651SAndreas.Sandberg@ARM.com instPort(name() + ".icache_port", this), 7111399Sandreas.sandberg@arm.com alwaysSyncTC(params->alwaysSyncTC), 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), 819752Sandreas@sandberg.pp.se ctrInsts(0) 829651SAndreas.Sandberg@ARM.com{ 839651SAndreas.Sandberg@ARM.com if (pageSize == -1) 849651SAndreas.Sandberg@ARM.com panic("KVM: Failed to determine host page size (%i)\n", 859651SAndreas.Sandberg@ARM.com errno); 869651SAndreas.Sandberg@ARM.com 8710553Salexandru.dutu@amd.com if (FullSystem) 8810553Salexandru.dutu@amd.com thread = new SimpleThread(this, 0, params->system, params->itb, params->dtb, 8910553Salexandru.dutu@amd.com params->isa[0]); 9010553Salexandru.dutu@amd.com else 9110553Salexandru.dutu@amd.com thread = new SimpleThread(this, /* thread_num */ 0, params->system, 9210553Salexandru.dutu@amd.com params->workload[0], params->itb, 9310553Salexandru.dutu@amd.com params->dtb, params->isa[0]); 9410553Salexandru.dutu@amd.com 959651SAndreas.Sandberg@ARM.com thread->setStatus(ThreadContext::Halted); 969651SAndreas.Sandberg@ARM.com tc = thread->getTC(); 979651SAndreas.Sandberg@ARM.com threadContexts.push_back(tc); 989651SAndreas.Sandberg@ARM.com} 999651SAndreas.Sandberg@ARM.com 1009651SAndreas.Sandberg@ARM.comBaseKvmCPU::~BaseKvmCPU() 1019651SAndreas.Sandberg@ARM.com{ 1029651SAndreas.Sandberg@ARM.com if (_kvmRun) 1039651SAndreas.Sandberg@ARM.com munmap(_kvmRun, vcpuMMapSize); 1049651SAndreas.Sandberg@ARM.com close(vcpuFD); 1059651SAndreas.Sandberg@ARM.com} 1069651SAndreas.Sandberg@ARM.com 1079651SAndreas.Sandberg@ARM.comvoid 1089651SAndreas.Sandberg@ARM.comBaseKvmCPU::init() 1099651SAndreas.Sandberg@ARM.com{ 1109651SAndreas.Sandberg@ARM.com BaseCPU::init(); 1119651SAndreas.Sandberg@ARM.com 1129651SAndreas.Sandberg@ARM.com if (numThreads != 1) 1139651SAndreas.Sandberg@ARM.com fatal("KVM: Multithreading not supported"); 1149651SAndreas.Sandberg@ARM.com 1159651SAndreas.Sandberg@ARM.com tc->initMemProxies(tc); 1169651SAndreas.Sandberg@ARM.com 1179651SAndreas.Sandberg@ARM.com // initialize CPU, including PC 1189651SAndreas.Sandberg@ARM.com if (FullSystem && !switchedOut()) 1199651SAndreas.Sandberg@ARM.com TheISA::initCPU(tc, tc->contextId()); 1209651SAndreas.Sandberg@ARM.com} 1219651SAndreas.Sandberg@ARM.com 1229651SAndreas.Sandberg@ARM.comvoid 1239651SAndreas.Sandberg@ARM.comBaseKvmCPU::startup() 1249651SAndreas.Sandberg@ARM.com{ 1259690Sandreas@sandberg.pp.se const BaseKvmCPUParams * const p( 1269690Sandreas@sandberg.pp.se dynamic_cast<const BaseKvmCPUParams *>(params())); 1279690Sandreas@sandberg.pp.se 12811363Sandreas@sandberg.pp.se Kvm &kvm(*vm.kvm); 1299651SAndreas.Sandberg@ARM.com 1309651SAndreas.Sandberg@ARM.com BaseCPU::startup(); 1319651SAndreas.Sandberg@ARM.com 1329651SAndreas.Sandberg@ARM.com assert(vcpuFD == -1); 1339651SAndreas.Sandberg@ARM.com 1349651SAndreas.Sandberg@ARM.com // Tell the VM that a CPU is about to start. 1359651SAndreas.Sandberg@ARM.com vm.cpuStartup(); 1369651SAndreas.Sandberg@ARM.com 1379651SAndreas.Sandberg@ARM.com // We can't initialize KVM CPUs in BaseKvmCPU::init() since we are 1389651SAndreas.Sandberg@ARM.com // not guaranteed that the parent KVM VM has initialized at that 1399651SAndreas.Sandberg@ARM.com // point. Initialize virtual CPUs here instead. 1409651SAndreas.Sandberg@ARM.com vcpuFD = vm.createVCPU(vcpuID); 1419651SAndreas.Sandberg@ARM.com 1429651SAndreas.Sandberg@ARM.com // Map the KVM run structure */ 1439651SAndreas.Sandberg@ARM.com vcpuMMapSize = kvm.getVCPUMMapSize(); 1449651SAndreas.Sandberg@ARM.com _kvmRun = (struct kvm_run *)mmap(0, vcpuMMapSize, 1459651SAndreas.Sandberg@ARM.com PROT_READ | PROT_WRITE, MAP_SHARED, 1469651SAndreas.Sandberg@ARM.com vcpuFD, 0); 1479651SAndreas.Sandberg@ARM.com if (_kvmRun == MAP_FAILED) 1489651SAndreas.Sandberg@ARM.com panic("KVM: Failed to map run data structure\n"); 1499651SAndreas.Sandberg@ARM.com 1509651SAndreas.Sandberg@ARM.com // Setup a pointer to the MMIO ring buffer if coalesced MMIO is 1519651SAndreas.Sandberg@ARM.com // available. The offset into the KVM's communication page is 1529651SAndreas.Sandberg@ARM.com // provided by the coalesced MMIO capability. 1539651SAndreas.Sandberg@ARM.com int mmioOffset(kvm.capCoalescedMMIO()); 1549690Sandreas@sandberg.pp.se if (!p->useCoalescedMMIO) { 1559690Sandreas@sandberg.pp.se inform("KVM: Coalesced MMIO disabled by config.\n"); 1569690Sandreas@sandberg.pp.se } else if (mmioOffset) { 1579651SAndreas.Sandberg@ARM.com inform("KVM: Coalesced IO available\n"); 1589651SAndreas.Sandberg@ARM.com mmioRing = (struct kvm_coalesced_mmio_ring *)( 1599651SAndreas.Sandberg@ARM.com (char *)_kvmRun + (mmioOffset * pageSize)); 1609651SAndreas.Sandberg@ARM.com } else { 1619651SAndreas.Sandberg@ARM.com inform("KVM: Coalesced not supported by host OS\n"); 1629651SAndreas.Sandberg@ARM.com } 1639732Sandreas@sandberg.pp.se 1649732Sandreas@sandberg.pp.se thread->startup(); 16510073Sandreas@sandberg.pp.se 16610073Sandreas@sandberg.pp.se Event *startupEvent( 16712085Sspwilson2@wisc.edu new EventFunctionWrapper([this]{ startupThread(); }, name(), true)); 16810073Sandreas@sandberg.pp.se schedule(startupEvent, curTick()); 16910073Sandreas@sandberg.pp.se} 17010073Sandreas@sandberg.pp.se 17111629Smichael.lebeane@amd.comBaseKvmCPU::Status 17211629Smichael.lebeane@amd.comBaseKvmCPU::KVMCpuPort::nextIOState() const 17311629Smichael.lebeane@amd.com{ 17411629Smichael.lebeane@amd.com return (activeMMIOReqs || pendingMMIOPkts.size()) 17511629Smichael.lebeane@amd.com ? RunningMMIOPending : RunningServiceCompletion; 17611629Smichael.lebeane@amd.com} 17711629Smichael.lebeane@amd.com 17811629Smichael.lebeane@amd.comTick 17911629Smichael.lebeane@amd.comBaseKvmCPU::KVMCpuPort::submitIO(PacketPtr pkt) 18011629Smichael.lebeane@amd.com{ 18111629Smichael.lebeane@amd.com if (cpu->system->isAtomicMode()) { 18211629Smichael.lebeane@amd.com Tick delay = sendAtomic(pkt); 18311629Smichael.lebeane@amd.com delete pkt->req; 18411629Smichael.lebeane@amd.com delete pkt; 18511629Smichael.lebeane@amd.com return delay; 18611629Smichael.lebeane@amd.com } else { 18711629Smichael.lebeane@amd.com if (pendingMMIOPkts.empty() && sendTimingReq(pkt)) { 18811629Smichael.lebeane@amd.com activeMMIOReqs++; 18911629Smichael.lebeane@amd.com } else { 19011629Smichael.lebeane@amd.com pendingMMIOPkts.push(pkt); 19111629Smichael.lebeane@amd.com } 19211629Smichael.lebeane@amd.com // Return value is irrelevant for timing-mode accesses. 19311629Smichael.lebeane@amd.com return 0; 19411629Smichael.lebeane@amd.com } 19511629Smichael.lebeane@amd.com} 19611629Smichael.lebeane@amd.com 19711629Smichael.lebeane@amd.combool 19811629Smichael.lebeane@amd.comBaseKvmCPU::KVMCpuPort::recvTimingResp(PacketPtr pkt) 19911629Smichael.lebeane@amd.com{ 20011629Smichael.lebeane@amd.com DPRINTF(KvmIO, "KVM: Finished timing request\n"); 20111629Smichael.lebeane@amd.com 20211629Smichael.lebeane@amd.com delete pkt->req; 20311629Smichael.lebeane@amd.com delete pkt; 20411629Smichael.lebeane@amd.com activeMMIOReqs--; 20511629Smichael.lebeane@amd.com 20611629Smichael.lebeane@amd.com // We can switch back into KVM when all pending and in-flight MMIO 20711629Smichael.lebeane@amd.com // operations have completed. 20811629Smichael.lebeane@amd.com if (!(activeMMIOReqs || pendingMMIOPkts.size())) { 20911629Smichael.lebeane@amd.com DPRINTF(KvmIO, "KVM: Finished all outstanding timing requests\n"); 21011629Smichael.lebeane@amd.com cpu->finishMMIOPending(); 21111629Smichael.lebeane@amd.com } 21211629Smichael.lebeane@amd.com return true; 21311629Smichael.lebeane@amd.com} 21411629Smichael.lebeane@amd.com 21511629Smichael.lebeane@amd.comvoid 21611629Smichael.lebeane@amd.comBaseKvmCPU::KVMCpuPort::recvReqRetry() 21711629Smichael.lebeane@amd.com{ 21811629Smichael.lebeane@amd.com DPRINTF(KvmIO, "KVM: Retry for timing request\n"); 21911629Smichael.lebeane@amd.com 22011629Smichael.lebeane@amd.com assert(pendingMMIOPkts.size()); 22111629Smichael.lebeane@amd.com 22211629Smichael.lebeane@amd.com // Assuming that we can issue infinite requests this cycle is a bit 22311629Smichael.lebeane@amd.com // unrealistic, but it's not worth modeling something more complex in 22411629Smichael.lebeane@amd.com // KVM. 22511629Smichael.lebeane@amd.com while (pendingMMIOPkts.size() && sendTimingReq(pendingMMIOPkts.front())) { 22611629Smichael.lebeane@amd.com pendingMMIOPkts.pop(); 22711629Smichael.lebeane@amd.com activeMMIOReqs++; 22811629Smichael.lebeane@amd.com } 22911629Smichael.lebeane@amd.com} 23011629Smichael.lebeane@amd.com 23111629Smichael.lebeane@amd.comvoid 23211629Smichael.lebeane@amd.comBaseKvmCPU::finishMMIOPending() 23311629Smichael.lebeane@amd.com{ 23411629Smichael.lebeane@amd.com assert(_status = RunningMMIOPending); 23511629Smichael.lebeane@amd.com assert(!tickEvent.scheduled()); 23611629Smichael.lebeane@amd.com 23711629Smichael.lebeane@amd.com _status = RunningServiceCompletion; 23811629Smichael.lebeane@amd.com schedule(tickEvent, nextCycle()); 23911629Smichael.lebeane@amd.com} 24011629Smichael.lebeane@amd.com 24110073Sandreas@sandberg.pp.sevoid 24210073Sandreas@sandberg.pp.seBaseKvmCPU::startupThread() 24310073Sandreas@sandberg.pp.se{ 24410073Sandreas@sandberg.pp.se // Do thread-specific initialization. We need to setup signal 24510073Sandreas@sandberg.pp.se // delivery for counters and timers from within the thread that 24610073Sandreas@sandberg.pp.se // will execute the event queue to ensure that signals are 24710073Sandreas@sandberg.pp.se // delivered to the right threads. 24810073Sandreas@sandberg.pp.se const BaseKvmCPUParams * const p( 24910073Sandreas@sandberg.pp.se dynamic_cast<const BaseKvmCPUParams *>(params())); 25010073Sandreas@sandberg.pp.se 25110114Sandreas@sandberg.pp.se vcpuThread = pthread_self(); 25210114Sandreas@sandberg.pp.se 25310098Sandreas@sandberg.pp.se // Setup signal handlers. This has to be done after the vCPU is 25410098Sandreas@sandberg.pp.se // created since it manipulates the vCPU signal mask. 25510098Sandreas@sandberg.pp.se setupSignalHandler(); 25610098Sandreas@sandberg.pp.se 25710073Sandreas@sandberg.pp.se setupCounters(); 25810073Sandreas@sandberg.pp.se 25910073Sandreas@sandberg.pp.se if (p->usePerfOverflow) 26010073Sandreas@sandberg.pp.se runTimer.reset(new PerfKvmTimer(hwCycles, 26110114Sandreas@sandberg.pp.se KVM_KICK_SIGNAL, 26210073Sandreas@sandberg.pp.se p->hostFactor, 26310073Sandreas@sandberg.pp.se p->hostFreq)); 26410073Sandreas@sandberg.pp.se else 26510114Sandreas@sandberg.pp.se runTimer.reset(new PosixKvmTimer(KVM_KICK_SIGNAL, CLOCK_MONOTONIC, 26610073Sandreas@sandberg.pp.se p->hostFactor, 26710073Sandreas@sandberg.pp.se p->hostFreq)); 26810073Sandreas@sandberg.pp.se 2699651SAndreas.Sandberg@ARM.com} 2709651SAndreas.Sandberg@ARM.com 2719651SAndreas.Sandberg@ARM.comvoid 2729651SAndreas.Sandberg@ARM.comBaseKvmCPU::regStats() 2739651SAndreas.Sandberg@ARM.com{ 2749651SAndreas.Sandberg@ARM.com using namespace Stats; 2759651SAndreas.Sandberg@ARM.com 2769651SAndreas.Sandberg@ARM.com BaseCPU::regStats(); 2779651SAndreas.Sandberg@ARM.com 2789684Sandreas@sandberg.pp.se numInsts 2799684Sandreas@sandberg.pp.se .name(name() + ".committedInsts") 2809684Sandreas@sandberg.pp.se .desc("Number of instructions committed") 2819684Sandreas@sandberg.pp.se ; 2829684Sandreas@sandberg.pp.se 2839651SAndreas.Sandberg@ARM.com numVMExits 2849651SAndreas.Sandberg@ARM.com .name(name() + ".numVMExits") 2859651SAndreas.Sandberg@ARM.com .desc("total number of KVM exits") 2869651SAndreas.Sandberg@ARM.com ; 2879651SAndreas.Sandberg@ARM.com 2889755Sandreas@sandberg.pp.se numVMHalfEntries 2899755Sandreas@sandberg.pp.se .name(name() + ".numVMHalfEntries") 2909755Sandreas@sandberg.pp.se .desc("number of KVM entries to finalize pending operations") 2919755Sandreas@sandberg.pp.se ; 2929755Sandreas@sandberg.pp.se 2939755Sandreas@sandberg.pp.se numExitSignal 2949755Sandreas@sandberg.pp.se .name(name() + ".numExitSignal") 2959755Sandreas@sandberg.pp.se .desc("exits due to signal delivery") 2969755Sandreas@sandberg.pp.se ; 2979755Sandreas@sandberg.pp.se 2989651SAndreas.Sandberg@ARM.com numMMIO 2999651SAndreas.Sandberg@ARM.com .name(name() + ".numMMIO") 3009651SAndreas.Sandberg@ARM.com .desc("number of VM exits due to memory mapped IO") 3019651SAndreas.Sandberg@ARM.com ; 3029651SAndreas.Sandberg@ARM.com 3039651SAndreas.Sandberg@ARM.com numCoalescedMMIO 3049651SAndreas.Sandberg@ARM.com .name(name() + ".numCoalescedMMIO") 3059651SAndreas.Sandberg@ARM.com .desc("number of coalesced memory mapped IO requests") 3069651SAndreas.Sandberg@ARM.com ; 3079651SAndreas.Sandberg@ARM.com 3089651SAndreas.Sandberg@ARM.com numIO 3099651SAndreas.Sandberg@ARM.com .name(name() + ".numIO") 3109651SAndreas.Sandberg@ARM.com .desc("number of VM exits due to legacy IO") 3119651SAndreas.Sandberg@ARM.com ; 3129651SAndreas.Sandberg@ARM.com 3139651SAndreas.Sandberg@ARM.com numHalt 3149651SAndreas.Sandberg@ARM.com .name(name() + ".numHalt") 3159651SAndreas.Sandberg@ARM.com .desc("number of VM exits due to wait for interrupt instructions") 3169651SAndreas.Sandberg@ARM.com ; 3179651SAndreas.Sandberg@ARM.com 3189651SAndreas.Sandberg@ARM.com numInterrupts 3199651SAndreas.Sandberg@ARM.com .name(name() + ".numInterrupts") 3209651SAndreas.Sandberg@ARM.com .desc("number of interrupts delivered") 3219651SAndreas.Sandberg@ARM.com ; 3229651SAndreas.Sandberg@ARM.com 3239651SAndreas.Sandberg@ARM.com numHypercalls 3249651SAndreas.Sandberg@ARM.com .name(name() + ".numHypercalls") 3259651SAndreas.Sandberg@ARM.com .desc("number of hypercalls") 3269651SAndreas.Sandberg@ARM.com ; 3279651SAndreas.Sandberg@ARM.com} 3289651SAndreas.Sandberg@ARM.com 3299651SAndreas.Sandberg@ARM.comvoid 33010905Sandreas.sandberg@arm.comBaseKvmCPU::serializeThread(CheckpointOut &cp, ThreadID tid) const 3319651SAndreas.Sandberg@ARM.com{ 3329683Sandreas@sandberg.pp.se if (DTRACE(Checkpoint)) { 3339683Sandreas@sandberg.pp.se DPRINTF(Checkpoint, "KVM: Serializing thread %i:\n", tid); 3349683Sandreas@sandberg.pp.se dump(); 3359683Sandreas@sandberg.pp.se } 3369683Sandreas@sandberg.pp.se 3379651SAndreas.Sandberg@ARM.com assert(tid == 0); 3389651SAndreas.Sandberg@ARM.com assert(_status == Idle); 33910905Sandreas.sandberg@arm.com thread->serialize(cp); 3409651SAndreas.Sandberg@ARM.com} 3419651SAndreas.Sandberg@ARM.com 3429651SAndreas.Sandberg@ARM.comvoid 34310905Sandreas.sandberg@arm.comBaseKvmCPU::unserializeThread(CheckpointIn &cp, ThreadID tid) 3449651SAndreas.Sandberg@ARM.com{ 3459683Sandreas@sandberg.pp.se DPRINTF(Checkpoint, "KVM: Unserialize thread %i:\n", tid); 3469683Sandreas@sandberg.pp.se 3479651SAndreas.Sandberg@ARM.com assert(tid == 0); 3489651SAndreas.Sandberg@ARM.com assert(_status == Idle); 34910905Sandreas.sandberg@arm.com thread->unserialize(cp); 3509652SAndreas.Sandberg@ARM.com threadContextDirty = true; 3519651SAndreas.Sandberg@ARM.com} 3529651SAndreas.Sandberg@ARM.com 35310913Sandreas.sandberg@arm.comDrainState 35410913Sandreas.sandberg@arm.comBaseKvmCPU::drain() 3559651SAndreas.Sandberg@ARM.com{ 3569651SAndreas.Sandberg@ARM.com if (switchedOut()) 35710913Sandreas.sandberg@arm.com return DrainState::Drained; 3589651SAndreas.Sandberg@ARM.com 3599753Sandreas@sandberg.pp.se DPRINTF(Drain, "BaseKvmCPU::drain\n"); 3609753Sandreas@sandberg.pp.se switch (_status) { 3619753Sandreas@sandberg.pp.se case Running: 3629753Sandreas@sandberg.pp.se // The base KVM code is normally ready when it is in the 3639753Sandreas@sandberg.pp.se // Running state, but the architecture specific code might be 3649753Sandreas@sandberg.pp.se // of a different opinion. This may happen when the CPU been 3659753Sandreas@sandberg.pp.se // notified of an event that hasn't been accepted by the vCPU 3669753Sandreas@sandberg.pp.se // yet. 36710913Sandreas.sandberg@arm.com if (!archIsDrained()) 36810913Sandreas.sandberg@arm.com return DrainState::Draining; 3699651SAndreas.Sandberg@ARM.com 3709753Sandreas@sandberg.pp.se // The state of the CPU is consistent, so we don't need to do 3719753Sandreas@sandberg.pp.se // anything special to drain it. We simply de-schedule the 3729753Sandreas@sandberg.pp.se // tick event and enter the Idle state to prevent nasty things 3739753Sandreas@sandberg.pp.se // like MMIOs from happening. 3749753Sandreas@sandberg.pp.se if (tickEvent.scheduled()) 3759753Sandreas@sandberg.pp.se deschedule(tickEvent); 3769753Sandreas@sandberg.pp.se _status = Idle; 3779651SAndreas.Sandberg@ARM.com 3789753Sandreas@sandberg.pp.se /** FALLTHROUGH */ 3799753Sandreas@sandberg.pp.se case Idle: 3809753Sandreas@sandberg.pp.se // Idle, no need to drain 3819753Sandreas@sandberg.pp.se assert(!tickEvent.scheduled()); 3829753Sandreas@sandberg.pp.se 3839753Sandreas@sandberg.pp.se // Sync the thread context here since we'll need it when we 3849753Sandreas@sandberg.pp.se // switch CPUs or checkpoint the CPU. 3859753Sandreas@sandberg.pp.se syncThreadContext(); 3869753Sandreas@sandberg.pp.se 38710913Sandreas.sandberg@arm.com return DrainState::Drained; 3889753Sandreas@sandberg.pp.se 3899753Sandreas@sandberg.pp.se case RunningServiceCompletion: 3909753Sandreas@sandberg.pp.se // The CPU has just requested a service that was handled in 3919753Sandreas@sandberg.pp.se // the RunningService state, but the results have still not 3929753Sandreas@sandberg.pp.se // been reported to the CPU. Now, we /could/ probably just 3939753Sandreas@sandberg.pp.se // update the register state ourselves instead of letting KVM 3949753Sandreas@sandberg.pp.se // handle it, but that would be tricky. Instead, we enter KVM 3959753Sandreas@sandberg.pp.se // and let it do its stuff. 3969753Sandreas@sandberg.pp.se DPRINTF(Drain, "KVM CPU is waiting for service completion, " 3979753Sandreas@sandberg.pp.se "requesting drain.\n"); 39810913Sandreas.sandberg@arm.com return DrainState::Draining; 3999753Sandreas@sandberg.pp.se 40011629Smichael.lebeane@amd.com case RunningMMIOPending: 40111629Smichael.lebeane@amd.com // We need to drain since there are in-flight timing accesses 40211629Smichael.lebeane@amd.com DPRINTF(Drain, "KVM CPU is waiting for timing accesses to complete, " 40311629Smichael.lebeane@amd.com "requesting drain.\n"); 40411629Smichael.lebeane@amd.com return DrainState::Draining; 40511629Smichael.lebeane@amd.com 4069753Sandreas@sandberg.pp.se case RunningService: 4079753Sandreas@sandberg.pp.se // We need to drain since the CPU is waiting for service (e.g., MMIOs) 4089753Sandreas@sandberg.pp.se DPRINTF(Drain, "KVM CPU is waiting for service, requesting drain.\n"); 40910913Sandreas.sandberg@arm.com return DrainState::Draining; 4109753Sandreas@sandberg.pp.se 4119753Sandreas@sandberg.pp.se default: 4129753Sandreas@sandberg.pp.se panic("KVM: Unhandled CPU state in drain()\n"); 41310913Sandreas.sandberg@arm.com return DrainState::Drained; 4149753Sandreas@sandberg.pp.se } 4159651SAndreas.Sandberg@ARM.com} 4169651SAndreas.Sandberg@ARM.com 4179651SAndreas.Sandberg@ARM.comvoid 4189651SAndreas.Sandberg@ARM.comBaseKvmCPU::drainResume() 4199651SAndreas.Sandberg@ARM.com{ 4209651SAndreas.Sandberg@ARM.com assert(!tickEvent.scheduled()); 4219651SAndreas.Sandberg@ARM.com 4229651SAndreas.Sandberg@ARM.com // We might have been switched out. In that case, we don't need to 4239651SAndreas.Sandberg@ARM.com // do anything. 4249651SAndreas.Sandberg@ARM.com if (switchedOut()) 4259651SAndreas.Sandberg@ARM.com return; 4269651SAndreas.Sandberg@ARM.com 4279651SAndreas.Sandberg@ARM.com DPRINTF(Kvm, "drainResume\n"); 4289651SAndreas.Sandberg@ARM.com verifyMemoryMode(); 4299651SAndreas.Sandberg@ARM.com 4309651SAndreas.Sandberg@ARM.com // The tick event is de-scheduled as a part of the draining 4319651SAndreas.Sandberg@ARM.com // process. Re-schedule it if the thread context is active. 4329651SAndreas.Sandberg@ARM.com if (tc->status() == ThreadContext::Active) { 4339651SAndreas.Sandberg@ARM.com schedule(tickEvent, nextCycle()); 4349651SAndreas.Sandberg@ARM.com _status = Running; 4359651SAndreas.Sandberg@ARM.com } else { 4369651SAndreas.Sandberg@ARM.com _status = Idle; 4379651SAndreas.Sandberg@ARM.com } 4389651SAndreas.Sandberg@ARM.com} 4399651SAndreas.Sandberg@ARM.com 4409651SAndreas.Sandberg@ARM.comvoid 44111363Sandreas@sandberg.pp.seBaseKvmCPU::notifyFork() 44211363Sandreas@sandberg.pp.se{ 44311363Sandreas@sandberg.pp.se // We should have drained prior to forking, which means that the 44411363Sandreas@sandberg.pp.se // tick event shouldn't be scheduled and the CPU is idle. 44511363Sandreas@sandberg.pp.se assert(!tickEvent.scheduled()); 44611363Sandreas@sandberg.pp.se assert(_status == Idle); 44711363Sandreas@sandberg.pp.se 44811363Sandreas@sandberg.pp.se if (vcpuFD != -1) { 44911363Sandreas@sandberg.pp.se if (close(vcpuFD) == -1) 45011363Sandreas@sandberg.pp.se warn("kvm CPU: notifyFork failed to close vcpuFD\n"); 45111363Sandreas@sandberg.pp.se 45211363Sandreas@sandberg.pp.se if (_kvmRun) 45311363Sandreas@sandberg.pp.se munmap(_kvmRun, vcpuMMapSize); 45411363Sandreas@sandberg.pp.se 45511363Sandreas@sandberg.pp.se vcpuFD = -1; 45611363Sandreas@sandberg.pp.se _kvmRun = NULL; 45711363Sandreas@sandberg.pp.se 45811363Sandreas@sandberg.pp.se hwInstructions.detach(); 45911363Sandreas@sandberg.pp.se hwCycles.detach(); 46011363Sandreas@sandberg.pp.se } 46111363Sandreas@sandberg.pp.se} 46211363Sandreas@sandberg.pp.se 46311363Sandreas@sandberg.pp.sevoid 4649651SAndreas.Sandberg@ARM.comBaseKvmCPU::switchOut() 4659651SAndreas.Sandberg@ARM.com{ 4669652SAndreas.Sandberg@ARM.com DPRINTF(Kvm, "switchOut\n"); 4679652SAndreas.Sandberg@ARM.com 4689651SAndreas.Sandberg@ARM.com BaseCPU::switchOut(); 4699651SAndreas.Sandberg@ARM.com 4709651SAndreas.Sandberg@ARM.com // We should have drained prior to executing a switchOut, which 4719651SAndreas.Sandberg@ARM.com // means that the tick event shouldn't be scheduled and the CPU is 4729651SAndreas.Sandberg@ARM.com // idle. 4739651SAndreas.Sandberg@ARM.com assert(!tickEvent.scheduled()); 4749651SAndreas.Sandberg@ARM.com assert(_status == Idle); 4759651SAndreas.Sandberg@ARM.com} 4769651SAndreas.Sandberg@ARM.com 4779651SAndreas.Sandberg@ARM.comvoid 4789651SAndreas.Sandberg@ARM.comBaseKvmCPU::takeOverFrom(BaseCPU *cpu) 4799651SAndreas.Sandberg@ARM.com{ 4809651SAndreas.Sandberg@ARM.com DPRINTF(Kvm, "takeOverFrom\n"); 4819651SAndreas.Sandberg@ARM.com 4829651SAndreas.Sandberg@ARM.com BaseCPU::takeOverFrom(cpu); 4839651SAndreas.Sandberg@ARM.com 4849651SAndreas.Sandberg@ARM.com // We should have drained prior to executing a switchOut, which 4859651SAndreas.Sandberg@ARM.com // means that the tick event shouldn't be scheduled and the CPU is 4869651SAndreas.Sandberg@ARM.com // idle. 4879651SAndreas.Sandberg@ARM.com assert(!tickEvent.scheduled()); 4889651SAndreas.Sandberg@ARM.com assert(_status == Idle); 4899651SAndreas.Sandberg@ARM.com assert(threadContexts.size() == 1); 4909651SAndreas.Sandberg@ARM.com 4919753Sandreas@sandberg.pp.se // Force an update of the KVM state here instead of flagging the 4929753Sandreas@sandberg.pp.se // TC as dirty. This is not ideal from a performance point of 4939753Sandreas@sandberg.pp.se // view, but it makes debugging easier as it allows meaningful KVM 4949753Sandreas@sandberg.pp.se // state to be dumped before and after a takeover. 4959753Sandreas@sandberg.pp.se updateKvmState(); 4969753Sandreas@sandberg.pp.se threadContextDirty = false; 4979651SAndreas.Sandberg@ARM.com} 4989651SAndreas.Sandberg@ARM.com 4999651SAndreas.Sandberg@ARM.comvoid 5009651SAndreas.Sandberg@ARM.comBaseKvmCPU::verifyMemoryMode() const 5019651SAndreas.Sandberg@ARM.com{ 50211629Smichael.lebeane@amd.com if (!(system->bypassCaches())) { 5039651SAndreas.Sandberg@ARM.com fatal("The KVM-based CPUs requires the memory system to be in the " 50411629Smichael.lebeane@amd.com "'noncaching' mode.\n"); 5059651SAndreas.Sandberg@ARM.com } 5069651SAndreas.Sandberg@ARM.com} 5079651SAndreas.Sandberg@ARM.com 5089651SAndreas.Sandberg@ARM.comvoid 50911151Smitch.hayenga@arm.comBaseKvmCPU::wakeup(ThreadID tid) 5109651SAndreas.Sandberg@ARM.com{ 5119651SAndreas.Sandberg@ARM.com DPRINTF(Kvm, "wakeup()\n"); 51210157Sandreas@sandberg.pp.se // This method might have been called from another 51310157Sandreas@sandberg.pp.se // context. Migrate to this SimObject's event queue when 51410157Sandreas@sandberg.pp.se // delivering the wakeup signal. 51510157Sandreas@sandberg.pp.se EventQueue::ScopedMigration migrate(eventQueue()); 51610157Sandreas@sandberg.pp.se 51710157Sandreas@sandberg.pp.se // Kick the vCPU to get it to come out of KVM. 51810157Sandreas@sandberg.pp.se kick(); 5199651SAndreas.Sandberg@ARM.com 5209651SAndreas.Sandberg@ARM.com if (thread->status() != ThreadContext::Suspended) 5219651SAndreas.Sandberg@ARM.com return; 5229651SAndreas.Sandberg@ARM.com 5239651SAndreas.Sandberg@ARM.com thread->activate(); 5249651SAndreas.Sandberg@ARM.com} 5259651SAndreas.Sandberg@ARM.com 5269651SAndreas.Sandberg@ARM.comvoid 52710407Smitch.hayenga@arm.comBaseKvmCPU::activateContext(ThreadID thread_num) 5289651SAndreas.Sandberg@ARM.com{ 52910407Smitch.hayenga@arm.com DPRINTF(Kvm, "ActivateContext %d\n", thread_num); 5309651SAndreas.Sandberg@ARM.com 5319651SAndreas.Sandberg@ARM.com assert(thread_num == 0); 5329651SAndreas.Sandberg@ARM.com assert(thread); 5339651SAndreas.Sandberg@ARM.com 5349651SAndreas.Sandberg@ARM.com assert(_status == Idle); 5359651SAndreas.Sandberg@ARM.com assert(!tickEvent.scheduled()); 5369651SAndreas.Sandberg@ARM.com 5379754Sandreas@sandberg.pp.se numCycles += ticksToCycles(thread->lastActivate - thread->lastSuspend); 5389651SAndreas.Sandberg@ARM.com 53910407Smitch.hayenga@arm.com schedule(tickEvent, clockEdge(Cycles(0))); 5409651SAndreas.Sandberg@ARM.com _status = Running; 5419651SAndreas.Sandberg@ARM.com} 5429651SAndreas.Sandberg@ARM.com 5439651SAndreas.Sandberg@ARM.com 5449651SAndreas.Sandberg@ARM.comvoid 5459651SAndreas.Sandberg@ARM.comBaseKvmCPU::suspendContext(ThreadID thread_num) 5469651SAndreas.Sandberg@ARM.com{ 5479651SAndreas.Sandberg@ARM.com DPRINTF(Kvm, "SuspendContext %d\n", thread_num); 5489651SAndreas.Sandberg@ARM.com 5499651SAndreas.Sandberg@ARM.com assert(thread_num == 0); 5509651SAndreas.Sandberg@ARM.com assert(thread); 5519651SAndreas.Sandberg@ARM.com 5529651SAndreas.Sandberg@ARM.com if (_status == Idle) 5539651SAndreas.Sandberg@ARM.com return; 5549651SAndreas.Sandberg@ARM.com 55510553Salexandru.dutu@amd.com assert(_status == Running || _status == RunningServiceCompletion); 5569651SAndreas.Sandberg@ARM.com 5579651SAndreas.Sandberg@ARM.com // The tick event may no be scheduled if the quest has requested 5589651SAndreas.Sandberg@ARM.com // the monitor to wait for interrupts. The normal CPU models can 5599651SAndreas.Sandberg@ARM.com // get their tick events descheduled by quiesce instructions, but 5609651SAndreas.Sandberg@ARM.com // that can't happen here. 5619651SAndreas.Sandberg@ARM.com if (tickEvent.scheduled()) 5629651SAndreas.Sandberg@ARM.com deschedule(tickEvent); 5639651SAndreas.Sandberg@ARM.com 5649651SAndreas.Sandberg@ARM.com _status = Idle; 5659651SAndreas.Sandberg@ARM.com} 5669651SAndreas.Sandberg@ARM.com 5679651SAndreas.Sandberg@ARM.comvoid 5689651SAndreas.Sandberg@ARM.comBaseKvmCPU::deallocateContext(ThreadID thread_num) 5699651SAndreas.Sandberg@ARM.com{ 5709651SAndreas.Sandberg@ARM.com // for now, these are equivalent 5719651SAndreas.Sandberg@ARM.com suspendContext(thread_num); 5729651SAndreas.Sandberg@ARM.com} 5739651SAndreas.Sandberg@ARM.com 5749651SAndreas.Sandberg@ARM.comvoid 5759651SAndreas.Sandberg@ARM.comBaseKvmCPU::haltContext(ThreadID thread_num) 5769651SAndreas.Sandberg@ARM.com{ 5779651SAndreas.Sandberg@ARM.com // for now, these are equivalent 5789651SAndreas.Sandberg@ARM.com suspendContext(thread_num); 5799651SAndreas.Sandberg@ARM.com} 5809651SAndreas.Sandberg@ARM.com 5819652SAndreas.Sandberg@ARM.comThreadContext * 5829652SAndreas.Sandberg@ARM.comBaseKvmCPU::getContext(int tn) 5839652SAndreas.Sandberg@ARM.com{ 5849652SAndreas.Sandberg@ARM.com assert(tn == 0); 5859652SAndreas.Sandberg@ARM.com syncThreadContext(); 5869652SAndreas.Sandberg@ARM.com return tc; 5879652SAndreas.Sandberg@ARM.com} 5889652SAndreas.Sandberg@ARM.com 5899652SAndreas.Sandberg@ARM.com 5909651SAndreas.Sandberg@ARM.comCounter 5919651SAndreas.Sandberg@ARM.comBaseKvmCPU::totalInsts() const 5929651SAndreas.Sandberg@ARM.com{ 5939752Sandreas@sandberg.pp.se return ctrInsts; 5949651SAndreas.Sandberg@ARM.com} 5959651SAndreas.Sandberg@ARM.com 5969651SAndreas.Sandberg@ARM.comCounter 5979651SAndreas.Sandberg@ARM.comBaseKvmCPU::totalOps() const 5989651SAndreas.Sandberg@ARM.com{ 5999651SAndreas.Sandberg@ARM.com hack_once("Pretending totalOps is equivalent to totalInsts()\n"); 6009752Sandreas@sandberg.pp.se return ctrInsts; 6019651SAndreas.Sandberg@ARM.com} 6029651SAndreas.Sandberg@ARM.com 6039651SAndreas.Sandberg@ARM.comvoid 60410905Sandreas.sandberg@arm.comBaseKvmCPU::dump() const 6059651SAndreas.Sandberg@ARM.com{ 6069651SAndreas.Sandberg@ARM.com inform("State dumping not implemented."); 6079651SAndreas.Sandberg@ARM.com} 6089651SAndreas.Sandberg@ARM.com 6099651SAndreas.Sandberg@ARM.comvoid 6109651SAndreas.Sandberg@ARM.comBaseKvmCPU::tick() 6119651SAndreas.Sandberg@ARM.com{ 6129753Sandreas@sandberg.pp.se Tick delay(0); 61311629Smichael.lebeane@amd.com assert(_status != Idle && _status != RunningMMIOPending); 6149651SAndreas.Sandberg@ARM.com 6159651SAndreas.Sandberg@ARM.com switch (_status) { 6169753Sandreas@sandberg.pp.se case RunningService: 6179753Sandreas@sandberg.pp.se // handleKvmExit() will determine the next state of the CPU 6189753Sandreas@sandberg.pp.se delay = handleKvmExit(); 6199753Sandreas@sandberg.pp.se 6209753Sandreas@sandberg.pp.se if (tryDrain()) 6219753Sandreas@sandberg.pp.se _status = Idle; 6229651SAndreas.Sandberg@ARM.com break; 6239651SAndreas.Sandberg@ARM.com 6249753Sandreas@sandberg.pp.se case RunningServiceCompletion: 6259753Sandreas@sandberg.pp.se case Running: { 62610858Sandreas.sandberg@arm.com const uint64_t nextInstEvent( 62710858Sandreas.sandberg@arm.com !comInstEventQueue[0]->empty() ? 62810858Sandreas.sandberg@arm.com comInstEventQueue[0]->nextTick() : UINT64_MAX); 62910858Sandreas.sandberg@arm.com // Enter into KVM and complete pending IO instructions if we 63010858Sandreas.sandberg@arm.com // have an instruction event pending. 63110858Sandreas.sandberg@arm.com const Tick ticksToExecute( 63210858Sandreas.sandberg@arm.com nextInstEvent > ctrInsts ? 63310858Sandreas.sandberg@arm.com curEventQueue()->nextTick() - curTick() : 0); 6349753Sandreas@sandberg.pp.se 63511399Sandreas.sandberg@arm.com if (alwaysSyncTC) 63611399Sandreas.sandberg@arm.com threadContextDirty = true; 63711399Sandreas.sandberg@arm.com 6389753Sandreas@sandberg.pp.se // We might need to update the KVM state. 6399753Sandreas@sandberg.pp.se syncKvmState(); 6409753Sandreas@sandberg.pp.se 6419892Sandreas@sandberg.pp.se // Setup any pending instruction count breakpoints using 64210858Sandreas.sandberg@arm.com // PerfEvent if we are going to execute more than just an IO 64310858Sandreas.sandberg@arm.com // completion. 64410858Sandreas.sandberg@arm.com if (ticksToExecute > 0) 64510858Sandreas.sandberg@arm.com setupInstStop(); 6469892Sandreas@sandberg.pp.se 6479753Sandreas@sandberg.pp.se DPRINTF(KvmRun, "Entering KVM...\n"); 64810913Sandreas.sandberg@arm.com if (drainState() == DrainState::Draining) { 6499753Sandreas@sandberg.pp.se // Force an immediate exit from KVM after completing 6509753Sandreas@sandberg.pp.se // pending operations. The architecture-specific code 6519753Sandreas@sandberg.pp.se // takes care to run until it is in a state where it can 6529753Sandreas@sandberg.pp.se // safely be drained. 6539753Sandreas@sandberg.pp.se delay = kvmRunDrain(); 6549753Sandreas@sandberg.pp.se } else { 6559753Sandreas@sandberg.pp.se delay = kvmRun(ticksToExecute); 6569753Sandreas@sandberg.pp.se } 6579753Sandreas@sandberg.pp.se 65810112Sandreas@sandberg.pp.se // The CPU might have been suspended before entering into 65910112Sandreas@sandberg.pp.se // KVM. Assume that the CPU was suspended /before/ entering 66010112Sandreas@sandberg.pp.se // into KVM and skip the exit handling. 66110112Sandreas@sandberg.pp.se if (_status == Idle) 66210112Sandreas@sandberg.pp.se break; 66310112Sandreas@sandberg.pp.se 6649753Sandreas@sandberg.pp.se // Entering into KVM implies that we'll have to reload the thread 6659753Sandreas@sandberg.pp.se // context from KVM if we want to access it. Flag the KVM state as 6669753Sandreas@sandberg.pp.se // dirty with respect to the cached thread context. 6679753Sandreas@sandberg.pp.se kvmStateDirty = true; 6689753Sandreas@sandberg.pp.se 66911399Sandreas.sandberg@arm.com if (alwaysSyncTC) 67011399Sandreas.sandberg@arm.com syncThreadContext(); 67111399Sandreas.sandberg@arm.com 6729753Sandreas@sandberg.pp.se // Enter into the RunningService state unless the 6739753Sandreas@sandberg.pp.se // simulation was stopped by a timer. 6749755Sandreas@sandberg.pp.se if (_kvmRun->exit_reason != KVM_EXIT_INTR) { 6759753Sandreas@sandberg.pp.se _status = RunningService; 6769755Sandreas@sandberg.pp.se } else { 6779755Sandreas@sandberg.pp.se ++numExitSignal; 6789753Sandreas@sandberg.pp.se _status = Running; 6799755Sandreas@sandberg.pp.se } 6809753Sandreas@sandberg.pp.se 6819904Sandreas@sandberg.pp.se // Service any pending instruction events. The vCPU should 6829904Sandreas@sandberg.pp.se // have exited in time for the event using the instruction 6839904Sandreas@sandberg.pp.se // counter configured by setupInstStop(). 6849904Sandreas@sandberg.pp.se comInstEventQueue[0]->serviceEvents(ctrInsts); 6859904Sandreas@sandberg.pp.se system->instEventQueue.serviceEvents(system->totalNumInsts); 6869904Sandreas@sandberg.pp.se 6879753Sandreas@sandberg.pp.se if (tryDrain()) 6889753Sandreas@sandberg.pp.se _status = Idle; 6899753Sandreas@sandberg.pp.se } break; 6909753Sandreas@sandberg.pp.se 6919651SAndreas.Sandberg@ARM.com default: 6929753Sandreas@sandberg.pp.se panic("BaseKvmCPU entered tick() in an illegal state (%i)\n", 6939753Sandreas@sandberg.pp.se _status); 6949651SAndreas.Sandberg@ARM.com } 6959753Sandreas@sandberg.pp.se 6969753Sandreas@sandberg.pp.se // Schedule a new tick if we are still running 69711629Smichael.lebeane@amd.com if (_status != Idle && _status != RunningMMIOPending) 6989753Sandreas@sandberg.pp.se schedule(tickEvent, clockEdge(ticksToCycles(delay))); 6999753Sandreas@sandberg.pp.se} 7009753Sandreas@sandberg.pp.se 7019753Sandreas@sandberg.pp.seTick 7029753Sandreas@sandberg.pp.seBaseKvmCPU::kvmRunDrain() 7039753Sandreas@sandberg.pp.se{ 7049753Sandreas@sandberg.pp.se // By default, the only thing we need to drain is a pending IO 7059753Sandreas@sandberg.pp.se // operation which assumes that we are in the 70611629Smichael.lebeane@amd.com // RunningServiceCompletion or RunningMMIOPending state. 70711629Smichael.lebeane@amd.com assert(_status == RunningServiceCompletion || 70811629Smichael.lebeane@amd.com _status == RunningMMIOPending); 7099753Sandreas@sandberg.pp.se 7109753Sandreas@sandberg.pp.se // Deliver the data from the pending IO operation and immediately 7119753Sandreas@sandberg.pp.se // exit. 7129753Sandreas@sandberg.pp.se return kvmRun(0); 7139651SAndreas.Sandberg@ARM.com} 7149651SAndreas.Sandberg@ARM.com 7159735Sandreas@sandberg.pp.seuint64_t 7169735Sandreas@sandberg.pp.seBaseKvmCPU::getHostCycles() const 7179735Sandreas@sandberg.pp.se{ 7189735Sandreas@sandberg.pp.se return hwCycles.read(); 7199735Sandreas@sandberg.pp.se} 7209735Sandreas@sandberg.pp.se 7219651SAndreas.Sandberg@ARM.comTick 7229651SAndreas.Sandberg@ARM.comBaseKvmCPU::kvmRun(Tick ticks) 7239651SAndreas.Sandberg@ARM.com{ 7249753Sandreas@sandberg.pp.se Tick ticksExecuted; 72511363Sandreas@sandberg.pp.se fatal_if(vcpuFD == -1, 72611363Sandreas@sandberg.pp.se "Trying to run a KVM CPU in a forked child process. " 72711363Sandreas@sandberg.pp.se "This is not supported.\n"); 7289651SAndreas.Sandberg@ARM.com DPRINTF(KvmRun, "KVM: Executing for %i ticks\n", ticks); 7299655SAndreas.Sandberg@ARM.com 7309753Sandreas@sandberg.pp.se if (ticks == 0) { 7319753Sandreas@sandberg.pp.se // Settings ticks == 0 is a special case which causes an entry 7329753Sandreas@sandberg.pp.se // into KVM that finishes pending operations (e.g., IO) and 7339753Sandreas@sandberg.pp.se // then immediately exits. 7349753Sandreas@sandberg.pp.se DPRINTF(KvmRun, "KVM: Delivering IO without full guest entry\n"); 7359735Sandreas@sandberg.pp.se 7369755Sandreas@sandberg.pp.se ++numVMHalfEntries; 7379755Sandreas@sandberg.pp.se 73810114Sandreas@sandberg.pp.se // Send a KVM_KICK_SIGNAL to the vCPU thread (i.e., this 73910114Sandreas@sandberg.pp.se // thread). The KVM control signal is masked while executing 74010114Sandreas@sandberg.pp.se // in gem5 and gets unmasked temporarily as when entering 7419753Sandreas@sandberg.pp.se // KVM. See setSignalMask() and setupSignalHandler(). 74210114Sandreas@sandberg.pp.se kick(); 7439655SAndreas.Sandberg@ARM.com 74410114Sandreas@sandberg.pp.se // Start the vCPU. KVM will check for signals after completing 74510114Sandreas@sandberg.pp.se // pending operations (IO). Since the KVM_KICK_SIGNAL is 74610114Sandreas@sandberg.pp.se // pending, this forces an immediate exit to gem5 again. We 7479753Sandreas@sandberg.pp.se // don't bother to setup timers since this shouldn't actually 74810114Sandreas@sandberg.pp.se // execute any code (other than completing half-executed IO 74910114Sandreas@sandberg.pp.se // instructions) in the guest. 7509753Sandreas@sandberg.pp.se ioctlRun(); 7519753Sandreas@sandberg.pp.se 7529753Sandreas@sandberg.pp.se // We always execute at least one cycle to prevent the 7539753Sandreas@sandberg.pp.se // BaseKvmCPU::tick() to be rescheduled on the same tick 7549753Sandreas@sandberg.pp.se // twice. 7559753Sandreas@sandberg.pp.se ticksExecuted = clockPeriod(); 7569753Sandreas@sandberg.pp.se } else { 75710157Sandreas@sandberg.pp.se // This method is executed as a result of a tick event. That 75810157Sandreas@sandberg.pp.se // means that the event queue will be locked when entering the 75910157Sandreas@sandberg.pp.se // method. We temporarily unlock the event queue to allow 76010157Sandreas@sandberg.pp.se // other threads to steal control of this thread to inject 76110157Sandreas@sandberg.pp.se // interrupts. They will typically lock the queue and then 76210157Sandreas@sandberg.pp.se // force an exit from KVM by kicking the vCPU. 76310157Sandreas@sandberg.pp.se EventQueue::ScopedRelease release(curEventQueue()); 76410157Sandreas@sandberg.pp.se 7659753Sandreas@sandberg.pp.se if (ticks < runTimer->resolution()) { 7669753Sandreas@sandberg.pp.se DPRINTF(KvmRun, "KVM: Adjusting tick count (%i -> %i)\n", 7679753Sandreas@sandberg.pp.se ticks, runTimer->resolution()); 7689753Sandreas@sandberg.pp.se ticks = runTimer->resolution(); 7699753Sandreas@sandberg.pp.se } 7709753Sandreas@sandberg.pp.se 7719753Sandreas@sandberg.pp.se // Get hardware statistics after synchronizing contexts. The KVM 7729753Sandreas@sandberg.pp.se // state update might affect guest cycle counters. 7739753Sandreas@sandberg.pp.se uint64_t baseCycles(getHostCycles()); 7749753Sandreas@sandberg.pp.se uint64_t baseInstrs(hwInstructions.read()); 7759753Sandreas@sandberg.pp.se 7769753Sandreas@sandberg.pp.se // Arm the run timer and start the cycle timer if it isn't 7779753Sandreas@sandberg.pp.se // controlled by the overflow timer. Starting/stopping the cycle 7789753Sandreas@sandberg.pp.se // timer automatically starts the other perf timers as they are in 7799753Sandreas@sandberg.pp.se // the same counter group. 7809753Sandreas@sandberg.pp.se runTimer->arm(ticks); 7819753Sandreas@sandberg.pp.se if (!perfControlledByTimer) 7829753Sandreas@sandberg.pp.se hwCycles.start(); 7839753Sandreas@sandberg.pp.se 7849753Sandreas@sandberg.pp.se ioctlRun(); 7859753Sandreas@sandberg.pp.se 7869753Sandreas@sandberg.pp.se runTimer->disarm(); 7879753Sandreas@sandberg.pp.se if (!perfControlledByTimer) 7889753Sandreas@sandberg.pp.se hwCycles.stop(); 7899753Sandreas@sandberg.pp.se 79010114Sandreas@sandberg.pp.se // The control signal may have been delivered after we exited 7919753Sandreas@sandberg.pp.se // from KVM. It will be pending in that case since it is 7929753Sandreas@sandberg.pp.se // masked when we aren't executing in KVM. Discard it to make 7939753Sandreas@sandberg.pp.se // sure we don't deliver it immediately next time we try to 7949753Sandreas@sandberg.pp.se // enter into KVM. 79510114Sandreas@sandberg.pp.se discardPendingSignal(KVM_KICK_SIGNAL); 7969753Sandreas@sandberg.pp.se 7979753Sandreas@sandberg.pp.se const uint64_t hostCyclesExecuted(getHostCycles() - baseCycles); 7989753Sandreas@sandberg.pp.se const uint64_t simCyclesExecuted(hostCyclesExecuted * hostFactor); 7999753Sandreas@sandberg.pp.se const uint64_t instsExecuted(hwInstructions.read() - baseInstrs); 8009753Sandreas@sandberg.pp.se ticksExecuted = runTimer->ticksFromHostCycles(hostCyclesExecuted); 8019753Sandreas@sandberg.pp.se 8029753Sandreas@sandberg.pp.se /* Update statistics */ 8039753Sandreas@sandberg.pp.se numCycles += simCyclesExecuted;; 8049753Sandreas@sandberg.pp.se numInsts += instsExecuted; 8059753Sandreas@sandberg.pp.se ctrInsts += instsExecuted; 8069753Sandreas@sandberg.pp.se system->totalNumInsts += instsExecuted; 8079753Sandreas@sandberg.pp.se 8089753Sandreas@sandberg.pp.se DPRINTF(KvmRun, 8099753Sandreas@sandberg.pp.se "KVM: Executed %i instructions in %i cycles " 8109753Sandreas@sandberg.pp.se "(%i ticks, sim cycles: %i).\n", 8119753Sandreas@sandberg.pp.se instsExecuted, hostCyclesExecuted, ticksExecuted, simCyclesExecuted); 8129651SAndreas.Sandberg@ARM.com } 8139655SAndreas.Sandberg@ARM.com 8149651SAndreas.Sandberg@ARM.com ++numVMExits; 8159651SAndreas.Sandberg@ARM.com 8169651SAndreas.Sandberg@ARM.com return ticksExecuted + flushCoalescedMMIO(); 8179651SAndreas.Sandberg@ARM.com} 8189651SAndreas.Sandberg@ARM.com 8199651SAndreas.Sandberg@ARM.comvoid 8209651SAndreas.Sandberg@ARM.comBaseKvmCPU::kvmNonMaskableInterrupt() 8219651SAndreas.Sandberg@ARM.com{ 8229651SAndreas.Sandberg@ARM.com ++numInterrupts; 8239651SAndreas.Sandberg@ARM.com if (ioctl(KVM_NMI) == -1) 8249651SAndreas.Sandberg@ARM.com panic("KVM: Failed to deliver NMI to virtual CPU\n"); 8259651SAndreas.Sandberg@ARM.com} 8269651SAndreas.Sandberg@ARM.com 8279651SAndreas.Sandberg@ARM.comvoid 8289651SAndreas.Sandberg@ARM.comBaseKvmCPU::kvmInterrupt(const struct kvm_interrupt &interrupt) 8299651SAndreas.Sandberg@ARM.com{ 8309651SAndreas.Sandberg@ARM.com ++numInterrupts; 8319651SAndreas.Sandberg@ARM.com if (ioctl(KVM_INTERRUPT, (void *)&interrupt) == -1) 8329651SAndreas.Sandberg@ARM.com panic("KVM: Failed to deliver interrupt to virtual CPU\n"); 8339651SAndreas.Sandberg@ARM.com} 8349651SAndreas.Sandberg@ARM.com 8359651SAndreas.Sandberg@ARM.comvoid 8369651SAndreas.Sandberg@ARM.comBaseKvmCPU::getRegisters(struct kvm_regs ®s) const 8379651SAndreas.Sandberg@ARM.com{ 8389651SAndreas.Sandberg@ARM.com if (ioctl(KVM_GET_REGS, ®s) == -1) 8399651SAndreas.Sandberg@ARM.com panic("KVM: Failed to get guest registers\n"); 8409651SAndreas.Sandberg@ARM.com} 8419651SAndreas.Sandberg@ARM.com 8429651SAndreas.Sandberg@ARM.comvoid 8439651SAndreas.Sandberg@ARM.comBaseKvmCPU::setRegisters(const struct kvm_regs ®s) 8449651SAndreas.Sandberg@ARM.com{ 8459651SAndreas.Sandberg@ARM.com if (ioctl(KVM_SET_REGS, (void *)®s) == -1) 8469651SAndreas.Sandberg@ARM.com panic("KVM: Failed to set guest registers\n"); 8479651SAndreas.Sandberg@ARM.com} 8489651SAndreas.Sandberg@ARM.com 8499651SAndreas.Sandberg@ARM.comvoid 8509651SAndreas.Sandberg@ARM.comBaseKvmCPU::getSpecialRegisters(struct kvm_sregs ®s) const 8519651SAndreas.Sandberg@ARM.com{ 8529651SAndreas.Sandberg@ARM.com if (ioctl(KVM_GET_SREGS, ®s) == -1) 8539651SAndreas.Sandberg@ARM.com panic("KVM: Failed to get guest special registers\n"); 8549651SAndreas.Sandberg@ARM.com} 8559651SAndreas.Sandberg@ARM.com 8569651SAndreas.Sandberg@ARM.comvoid 8579651SAndreas.Sandberg@ARM.comBaseKvmCPU::setSpecialRegisters(const struct kvm_sregs ®s) 8589651SAndreas.Sandberg@ARM.com{ 8599651SAndreas.Sandberg@ARM.com if (ioctl(KVM_SET_SREGS, (void *)®s) == -1) 8609651SAndreas.Sandberg@ARM.com panic("KVM: Failed to set guest special registers\n"); 8619651SAndreas.Sandberg@ARM.com} 8629651SAndreas.Sandberg@ARM.com 8639651SAndreas.Sandberg@ARM.comvoid 8649651SAndreas.Sandberg@ARM.comBaseKvmCPU::getFPUState(struct kvm_fpu &state) const 8659651SAndreas.Sandberg@ARM.com{ 8669651SAndreas.Sandberg@ARM.com if (ioctl(KVM_GET_FPU, &state) == -1) 8679651SAndreas.Sandberg@ARM.com panic("KVM: Failed to get guest FPU state\n"); 8689651SAndreas.Sandberg@ARM.com} 8699651SAndreas.Sandberg@ARM.com 8709651SAndreas.Sandberg@ARM.comvoid 8719651SAndreas.Sandberg@ARM.comBaseKvmCPU::setFPUState(const struct kvm_fpu &state) 8729651SAndreas.Sandberg@ARM.com{ 8739651SAndreas.Sandberg@ARM.com if (ioctl(KVM_SET_FPU, (void *)&state) == -1) 8749651SAndreas.Sandberg@ARM.com panic("KVM: Failed to set guest FPU state\n"); 8759651SAndreas.Sandberg@ARM.com} 8769651SAndreas.Sandberg@ARM.com 8779651SAndreas.Sandberg@ARM.com 8789651SAndreas.Sandberg@ARM.comvoid 8799651SAndreas.Sandberg@ARM.comBaseKvmCPU::setOneReg(uint64_t id, const void *addr) 8809651SAndreas.Sandberg@ARM.com{ 8819651SAndreas.Sandberg@ARM.com#ifdef KVM_SET_ONE_REG 8829651SAndreas.Sandberg@ARM.com struct kvm_one_reg reg; 8839651SAndreas.Sandberg@ARM.com reg.id = id; 8849651SAndreas.Sandberg@ARM.com reg.addr = (uint64_t)addr; 8859651SAndreas.Sandberg@ARM.com 8869651SAndreas.Sandberg@ARM.com if (ioctl(KVM_SET_ONE_REG, ®) == -1) { 8879651SAndreas.Sandberg@ARM.com panic("KVM: Failed to set register (0x%x) value (errno: %i)\n", 8889651SAndreas.Sandberg@ARM.com id, errno); 8899651SAndreas.Sandberg@ARM.com } 8909651SAndreas.Sandberg@ARM.com#else 8919651SAndreas.Sandberg@ARM.com panic("KVM_SET_ONE_REG is unsupported on this platform.\n"); 8929651SAndreas.Sandberg@ARM.com#endif 8939651SAndreas.Sandberg@ARM.com} 8949651SAndreas.Sandberg@ARM.com 8959651SAndreas.Sandberg@ARM.comvoid 8969651SAndreas.Sandberg@ARM.comBaseKvmCPU::getOneReg(uint64_t id, void *addr) const 8979651SAndreas.Sandberg@ARM.com{ 8989651SAndreas.Sandberg@ARM.com#ifdef KVM_GET_ONE_REG 8999651SAndreas.Sandberg@ARM.com struct kvm_one_reg reg; 9009651SAndreas.Sandberg@ARM.com reg.id = id; 9019651SAndreas.Sandberg@ARM.com reg.addr = (uint64_t)addr; 9029651SAndreas.Sandberg@ARM.com 9039651SAndreas.Sandberg@ARM.com if (ioctl(KVM_GET_ONE_REG, ®) == -1) { 9049651SAndreas.Sandberg@ARM.com panic("KVM: Failed to get register (0x%x) value (errno: %i)\n", 9059651SAndreas.Sandberg@ARM.com id, errno); 9069651SAndreas.Sandberg@ARM.com } 9079651SAndreas.Sandberg@ARM.com#else 9089651SAndreas.Sandberg@ARM.com panic("KVM_GET_ONE_REG is unsupported on this platform.\n"); 9099651SAndreas.Sandberg@ARM.com#endif 9109651SAndreas.Sandberg@ARM.com} 9119651SAndreas.Sandberg@ARM.com 9129651SAndreas.Sandberg@ARM.comstd::string 9139651SAndreas.Sandberg@ARM.comBaseKvmCPU::getAndFormatOneReg(uint64_t id) const 9149651SAndreas.Sandberg@ARM.com{ 9159651SAndreas.Sandberg@ARM.com#ifdef KVM_GET_ONE_REG 9169651SAndreas.Sandberg@ARM.com std::ostringstream ss; 9179651SAndreas.Sandberg@ARM.com 9189651SAndreas.Sandberg@ARM.com ss.setf(std::ios::hex, std::ios::basefield); 9199651SAndreas.Sandberg@ARM.com ss.setf(std::ios::showbase); 9209651SAndreas.Sandberg@ARM.com#define HANDLE_INTTYPE(len) \ 9219651SAndreas.Sandberg@ARM.com case KVM_REG_SIZE_U ## len: { \ 9229651SAndreas.Sandberg@ARM.com uint ## len ## _t value; \ 9239651SAndreas.Sandberg@ARM.com getOneReg(id, &value); \ 9249651SAndreas.Sandberg@ARM.com ss << value; \ 9259651SAndreas.Sandberg@ARM.com } break 9269651SAndreas.Sandberg@ARM.com 92710843Sandreas.sandberg@arm.com#define HANDLE_ARRAY(len) \ 92810843Sandreas.sandberg@arm.com case KVM_REG_SIZE_U ## len: { \ 92910843Sandreas.sandberg@arm.com uint8_t value[len / 8]; \ 93010843Sandreas.sandberg@arm.com getOneReg(id, value); \ 93110843Sandreas.sandberg@arm.com ccprintf(ss, "[0x%x", value[0]); \ 93210843Sandreas.sandberg@arm.com for (int i = 1; i < len / 8; ++i) \ 93310843Sandreas.sandberg@arm.com ccprintf(ss, ", 0x%x", value[i]); \ 93410843Sandreas.sandberg@arm.com ccprintf(ss, "]"); \ 9359651SAndreas.Sandberg@ARM.com } break 9369651SAndreas.Sandberg@ARM.com 9379651SAndreas.Sandberg@ARM.com switch (id & KVM_REG_SIZE_MASK) { 9389651SAndreas.Sandberg@ARM.com HANDLE_INTTYPE(8); 9399651SAndreas.Sandberg@ARM.com HANDLE_INTTYPE(16); 9409651SAndreas.Sandberg@ARM.com HANDLE_INTTYPE(32); 9419651SAndreas.Sandberg@ARM.com HANDLE_INTTYPE(64); 9429651SAndreas.Sandberg@ARM.com HANDLE_ARRAY(128); 9439651SAndreas.Sandberg@ARM.com HANDLE_ARRAY(256); 9449651SAndreas.Sandberg@ARM.com HANDLE_ARRAY(512); 9459651SAndreas.Sandberg@ARM.com HANDLE_ARRAY(1024); 9469651SAndreas.Sandberg@ARM.com default: 9479651SAndreas.Sandberg@ARM.com ss << "??"; 9489651SAndreas.Sandberg@ARM.com } 9499651SAndreas.Sandberg@ARM.com 9509651SAndreas.Sandberg@ARM.com#undef HANDLE_INTTYPE 9519651SAndreas.Sandberg@ARM.com#undef HANDLE_ARRAY 9529651SAndreas.Sandberg@ARM.com 9539651SAndreas.Sandberg@ARM.com return ss.str(); 9549651SAndreas.Sandberg@ARM.com#else 9559651SAndreas.Sandberg@ARM.com panic("KVM_GET_ONE_REG is unsupported on this platform.\n"); 9569651SAndreas.Sandberg@ARM.com#endif 9579651SAndreas.Sandberg@ARM.com} 9589651SAndreas.Sandberg@ARM.com 9599652SAndreas.Sandberg@ARM.comvoid 9609652SAndreas.Sandberg@ARM.comBaseKvmCPU::syncThreadContext() 9619652SAndreas.Sandberg@ARM.com{ 9629652SAndreas.Sandberg@ARM.com if (!kvmStateDirty) 9639652SAndreas.Sandberg@ARM.com return; 9649652SAndreas.Sandberg@ARM.com 9659652SAndreas.Sandberg@ARM.com assert(!threadContextDirty); 9669652SAndreas.Sandberg@ARM.com 9679652SAndreas.Sandberg@ARM.com updateThreadContext(); 9689652SAndreas.Sandberg@ARM.com kvmStateDirty = false; 9699652SAndreas.Sandberg@ARM.com} 9709652SAndreas.Sandberg@ARM.com 9719652SAndreas.Sandberg@ARM.comvoid 9729652SAndreas.Sandberg@ARM.comBaseKvmCPU::syncKvmState() 9739652SAndreas.Sandberg@ARM.com{ 9749652SAndreas.Sandberg@ARM.com if (!threadContextDirty) 9759652SAndreas.Sandberg@ARM.com return; 9769652SAndreas.Sandberg@ARM.com 9779652SAndreas.Sandberg@ARM.com assert(!kvmStateDirty); 9789652SAndreas.Sandberg@ARM.com 9799652SAndreas.Sandberg@ARM.com updateKvmState(); 9809652SAndreas.Sandberg@ARM.com threadContextDirty = false; 9819652SAndreas.Sandberg@ARM.com} 9829652SAndreas.Sandberg@ARM.com 9839651SAndreas.Sandberg@ARM.comTick 9849651SAndreas.Sandberg@ARM.comBaseKvmCPU::handleKvmExit() 9859651SAndreas.Sandberg@ARM.com{ 9869651SAndreas.Sandberg@ARM.com DPRINTF(KvmRun, "handleKvmExit (exit_reason: %i)\n", _kvmRun->exit_reason); 9879753Sandreas@sandberg.pp.se assert(_status == RunningService); 9889651SAndreas.Sandberg@ARM.com 9899753Sandreas@sandberg.pp.se // Switch into the running state by default. Individual handlers 9909753Sandreas@sandberg.pp.se // can override this. 9919753Sandreas@sandberg.pp.se _status = Running; 9929651SAndreas.Sandberg@ARM.com switch (_kvmRun->exit_reason) { 9939651SAndreas.Sandberg@ARM.com case KVM_EXIT_UNKNOWN: 9949651SAndreas.Sandberg@ARM.com return handleKvmExitUnknown(); 9959651SAndreas.Sandberg@ARM.com 9969651SAndreas.Sandberg@ARM.com case KVM_EXIT_EXCEPTION: 9979651SAndreas.Sandberg@ARM.com return handleKvmExitException(); 9989651SAndreas.Sandberg@ARM.com 9999651SAndreas.Sandberg@ARM.com case KVM_EXIT_IO: 100011629Smichael.lebeane@amd.com { 10019651SAndreas.Sandberg@ARM.com ++numIO; 100211629Smichael.lebeane@amd.com Tick ticks = handleKvmExitIO(); 100311629Smichael.lebeane@amd.com _status = dataPort.nextIOState(); 100411629Smichael.lebeane@amd.com return ticks; 100511629Smichael.lebeane@amd.com } 10069651SAndreas.Sandberg@ARM.com 10079651SAndreas.Sandberg@ARM.com case KVM_EXIT_HYPERCALL: 10089651SAndreas.Sandberg@ARM.com ++numHypercalls; 10099651SAndreas.Sandberg@ARM.com return handleKvmExitHypercall(); 10109651SAndreas.Sandberg@ARM.com 10119651SAndreas.Sandberg@ARM.com case KVM_EXIT_HLT: 10129651SAndreas.Sandberg@ARM.com /* The guest has halted and is waiting for interrupts */ 10139651SAndreas.Sandberg@ARM.com DPRINTF(Kvm, "handleKvmExitHalt\n"); 10149651SAndreas.Sandberg@ARM.com ++numHalt; 10159651SAndreas.Sandberg@ARM.com 10169651SAndreas.Sandberg@ARM.com // Suspend the thread until the next interrupt arrives 10179651SAndreas.Sandberg@ARM.com thread->suspend(); 10189651SAndreas.Sandberg@ARM.com 10199651SAndreas.Sandberg@ARM.com // This is actually ignored since the thread is suspended. 10209651SAndreas.Sandberg@ARM.com return 0; 10219651SAndreas.Sandberg@ARM.com 10229651SAndreas.Sandberg@ARM.com case KVM_EXIT_MMIO: 102311629Smichael.lebeane@amd.com { 10249651SAndreas.Sandberg@ARM.com /* Service memory mapped IO requests */ 10259651SAndreas.Sandberg@ARM.com DPRINTF(KvmIO, "KVM: Handling MMIO (w: %u, addr: 0x%x, len: %u)\n", 10269651SAndreas.Sandberg@ARM.com _kvmRun->mmio.is_write, 10279651SAndreas.Sandberg@ARM.com _kvmRun->mmio.phys_addr, _kvmRun->mmio.len); 10289651SAndreas.Sandberg@ARM.com 10299651SAndreas.Sandberg@ARM.com ++numMMIO; 103011629Smichael.lebeane@amd.com Tick ticks = doMMIOAccess(_kvmRun->mmio.phys_addr, _kvmRun->mmio.data, 103111629Smichael.lebeane@amd.com _kvmRun->mmio.len, _kvmRun->mmio.is_write); 103211629Smichael.lebeane@amd.com // doMMIOAccess could have triggered a suspend, in which case we don't 103311629Smichael.lebeane@amd.com // want to overwrite the _status. 103411629Smichael.lebeane@amd.com if (_status != Idle) 103511629Smichael.lebeane@amd.com _status = dataPort.nextIOState(); 103611629Smichael.lebeane@amd.com return ticks; 103711629Smichael.lebeane@amd.com } 10389651SAndreas.Sandberg@ARM.com 10399651SAndreas.Sandberg@ARM.com case KVM_EXIT_IRQ_WINDOW_OPEN: 10409651SAndreas.Sandberg@ARM.com return handleKvmExitIRQWindowOpen(); 10419651SAndreas.Sandberg@ARM.com 10429651SAndreas.Sandberg@ARM.com case KVM_EXIT_FAIL_ENTRY: 10439651SAndreas.Sandberg@ARM.com return handleKvmExitFailEntry(); 10449651SAndreas.Sandberg@ARM.com 10459651SAndreas.Sandberg@ARM.com case KVM_EXIT_INTR: 10469651SAndreas.Sandberg@ARM.com /* KVM was interrupted by a signal, restart it in the next 10479651SAndreas.Sandberg@ARM.com * tick. */ 10489651SAndreas.Sandberg@ARM.com return 0; 10499651SAndreas.Sandberg@ARM.com 10509651SAndreas.Sandberg@ARM.com case KVM_EXIT_INTERNAL_ERROR: 10519651SAndreas.Sandberg@ARM.com panic("KVM: Internal error (suberror: %u)\n", 10529651SAndreas.Sandberg@ARM.com _kvmRun->internal.suberror); 10539651SAndreas.Sandberg@ARM.com 10549651SAndreas.Sandberg@ARM.com default: 10559689Sandreas@sandberg.pp.se dump(); 10569651SAndreas.Sandberg@ARM.com panic("KVM: Unexpected exit (exit_reason: %u)\n", _kvmRun->exit_reason); 10579651SAndreas.Sandberg@ARM.com } 10589651SAndreas.Sandberg@ARM.com} 10599651SAndreas.Sandberg@ARM.com 10609651SAndreas.Sandberg@ARM.comTick 10619651SAndreas.Sandberg@ARM.comBaseKvmCPU::handleKvmExitIO() 10629651SAndreas.Sandberg@ARM.com{ 10639651SAndreas.Sandberg@ARM.com panic("KVM: Unhandled guest IO (dir: %i, size: %i, port: 0x%x, count: %i)\n", 10649651SAndreas.Sandberg@ARM.com _kvmRun->io.direction, _kvmRun->io.size, 10659651SAndreas.Sandberg@ARM.com _kvmRun->io.port, _kvmRun->io.count); 10669651SAndreas.Sandberg@ARM.com} 10679651SAndreas.Sandberg@ARM.com 10689651SAndreas.Sandberg@ARM.comTick 10699651SAndreas.Sandberg@ARM.comBaseKvmCPU::handleKvmExitHypercall() 10709651SAndreas.Sandberg@ARM.com{ 10719651SAndreas.Sandberg@ARM.com panic("KVM: Unhandled hypercall\n"); 10729651SAndreas.Sandberg@ARM.com} 10739651SAndreas.Sandberg@ARM.com 10749651SAndreas.Sandberg@ARM.comTick 10759651SAndreas.Sandberg@ARM.comBaseKvmCPU::handleKvmExitIRQWindowOpen() 10769651SAndreas.Sandberg@ARM.com{ 10779651SAndreas.Sandberg@ARM.com warn("KVM: Unhandled IRQ window.\n"); 10789651SAndreas.Sandberg@ARM.com return 0; 10799651SAndreas.Sandberg@ARM.com} 10809651SAndreas.Sandberg@ARM.com 10819651SAndreas.Sandberg@ARM.com 10829651SAndreas.Sandberg@ARM.comTick 10839651SAndreas.Sandberg@ARM.comBaseKvmCPU::handleKvmExitUnknown() 10849651SAndreas.Sandberg@ARM.com{ 10859689Sandreas@sandberg.pp.se dump(); 10869651SAndreas.Sandberg@ARM.com panic("KVM: Unknown error when starting vCPU (hw reason: 0x%llx)\n", 10879651SAndreas.Sandberg@ARM.com _kvmRun->hw.hardware_exit_reason); 10889651SAndreas.Sandberg@ARM.com} 10899651SAndreas.Sandberg@ARM.com 10909651SAndreas.Sandberg@ARM.comTick 10919651SAndreas.Sandberg@ARM.comBaseKvmCPU::handleKvmExitException() 10929651SAndreas.Sandberg@ARM.com{ 10939689Sandreas@sandberg.pp.se dump(); 10949651SAndreas.Sandberg@ARM.com panic("KVM: Got exception when starting vCPU " 10959651SAndreas.Sandberg@ARM.com "(exception: %u, error_code: %u)\n", 10969651SAndreas.Sandberg@ARM.com _kvmRun->ex.exception, _kvmRun->ex.error_code); 10979651SAndreas.Sandberg@ARM.com} 10989651SAndreas.Sandberg@ARM.com 10999651SAndreas.Sandberg@ARM.comTick 11009651SAndreas.Sandberg@ARM.comBaseKvmCPU::handleKvmExitFailEntry() 11019651SAndreas.Sandberg@ARM.com{ 11029689Sandreas@sandberg.pp.se dump(); 11039651SAndreas.Sandberg@ARM.com panic("KVM: Failed to enter virtualized mode (hw reason: 0x%llx)\n", 11049651SAndreas.Sandberg@ARM.com _kvmRun->fail_entry.hardware_entry_failure_reason); 11059651SAndreas.Sandberg@ARM.com} 11069651SAndreas.Sandberg@ARM.com 11079651SAndreas.Sandberg@ARM.comTick 11089651SAndreas.Sandberg@ARM.comBaseKvmCPU::doMMIOAccess(Addr paddr, void *data, int size, bool write) 11099651SAndreas.Sandberg@ARM.com{ 11109760Sandreas@sandberg.pp.se ThreadContext *tc(thread->getTC()); 11119760Sandreas@sandberg.pp.se syncThreadContext(); 11129760Sandreas@sandberg.pp.se 111311629Smichael.lebeane@amd.com RequestPtr mmio_req = new Request(paddr, size, Request::UNCACHEABLE, 111411629Smichael.lebeane@amd.com dataMasterId()); 111511629Smichael.lebeane@amd.com mmio_req->setContext(tc->contextId()); 11169760Sandreas@sandberg.pp.se // Some architectures do need to massage physical addresses a bit 11179760Sandreas@sandberg.pp.se // before they are inserted into the memory system. This enables 11189760Sandreas@sandberg.pp.se // APIC accesses on x86 and m5ops where supported through a MMIO 11199760Sandreas@sandberg.pp.se // interface. 11209760Sandreas@sandberg.pp.se BaseTLB::Mode tlb_mode(write ? BaseTLB::Write : BaseTLB::Read); 112111629Smichael.lebeane@amd.com Fault fault(tc->getDTBPtr()->finalizePhysical(mmio_req, tc, tlb_mode)); 11229760Sandreas@sandberg.pp.se if (fault != NoFault) 11239760Sandreas@sandberg.pp.se warn("Finalization of MMIO address failed: %s\n", fault->name()); 11249760Sandreas@sandberg.pp.se 11259651SAndreas.Sandberg@ARM.com 11269651SAndreas.Sandberg@ARM.com const MemCmd cmd(write ? MemCmd::WriteReq : MemCmd::ReadReq); 112711629Smichael.lebeane@amd.com PacketPtr pkt = new Packet(mmio_req, cmd); 112811629Smichael.lebeane@amd.com pkt->dataStatic(data); 11299760Sandreas@sandberg.pp.se 113011629Smichael.lebeane@amd.com if (mmio_req->isMmappedIpr()) { 113110157Sandreas@sandberg.pp.se // We currently assume that there is no need to migrate to a 113210157Sandreas@sandberg.pp.se // different event queue when doing IPRs. Currently, IPRs are 113310157Sandreas@sandberg.pp.se // only used for m5ops, so it should be a valid assumption. 11349882Sandreas@sandberg.pp.se const Cycles ipr_delay(write ? 113511629Smichael.lebeane@amd.com TheISA::handleIprWrite(tc, pkt) : 113611629Smichael.lebeane@amd.com TheISA::handleIprRead(tc, pkt)); 113710553Salexandru.dutu@amd.com threadContextDirty = true; 113811629Smichael.lebeane@amd.com delete pkt->req; 113911629Smichael.lebeane@amd.com delete pkt; 11409925Sandreas@sandberg.pp.se return clockPeriod() * ipr_delay; 11419760Sandreas@sandberg.pp.se } else { 114210157Sandreas@sandberg.pp.se // Temporarily lock and migrate to the event queue of the 114310157Sandreas@sandberg.pp.se // VM. This queue is assumed to "own" all devices we need to 114410157Sandreas@sandberg.pp.se // access if running in multi-core mode. 114510157Sandreas@sandberg.pp.se EventQueue::ScopedMigration migrate(vm.eventQueue()); 114610157Sandreas@sandberg.pp.se 114711629Smichael.lebeane@amd.com return dataPort.submitIO(pkt); 11489760Sandreas@sandberg.pp.se } 11499651SAndreas.Sandberg@ARM.com} 11509651SAndreas.Sandberg@ARM.com 11519753Sandreas@sandberg.pp.sevoid 11529753Sandreas@sandberg.pp.seBaseKvmCPU::setSignalMask(const sigset_t *mask) 11539753Sandreas@sandberg.pp.se{ 11549753Sandreas@sandberg.pp.se std::unique_ptr<struct kvm_signal_mask> kvm_mask; 11559753Sandreas@sandberg.pp.se 11569753Sandreas@sandberg.pp.se if (mask) { 11579753Sandreas@sandberg.pp.se kvm_mask.reset((struct kvm_signal_mask *)operator new( 11589753Sandreas@sandberg.pp.se sizeof(struct kvm_signal_mask) + sizeof(*mask))); 11599753Sandreas@sandberg.pp.se // The kernel and the user-space headers have different ideas 11609753Sandreas@sandberg.pp.se // about the size of sigset_t. This seems like a massive hack, 11619753Sandreas@sandberg.pp.se // but is actually what qemu does. 11629753Sandreas@sandberg.pp.se assert(sizeof(*mask) >= 8); 11639753Sandreas@sandberg.pp.se kvm_mask->len = 8; 11649753Sandreas@sandberg.pp.se memcpy(kvm_mask->sigset, mask, kvm_mask->len); 11659753Sandreas@sandberg.pp.se } 11669753Sandreas@sandberg.pp.se 11679753Sandreas@sandberg.pp.se if (ioctl(KVM_SET_SIGNAL_MASK, (void *)kvm_mask.get()) == -1) 11689753Sandreas@sandberg.pp.se panic("KVM: Failed to set vCPU signal mask (errno: %i)\n", 11699753Sandreas@sandberg.pp.se errno); 11709753Sandreas@sandberg.pp.se} 11719753Sandreas@sandberg.pp.se 11729651SAndreas.Sandberg@ARM.comint 11739651SAndreas.Sandberg@ARM.comBaseKvmCPU::ioctl(int request, long p1) const 11749651SAndreas.Sandberg@ARM.com{ 11759651SAndreas.Sandberg@ARM.com if (vcpuFD == -1) 11769651SAndreas.Sandberg@ARM.com panic("KVM: CPU ioctl called before initialization\n"); 11779651SAndreas.Sandberg@ARM.com 11789651SAndreas.Sandberg@ARM.com return ::ioctl(vcpuFD, request, p1); 11799651SAndreas.Sandberg@ARM.com} 11809651SAndreas.Sandberg@ARM.com 11819651SAndreas.Sandberg@ARM.comTick 11829651SAndreas.Sandberg@ARM.comBaseKvmCPU::flushCoalescedMMIO() 11839651SAndreas.Sandberg@ARM.com{ 11849651SAndreas.Sandberg@ARM.com if (!mmioRing) 11859651SAndreas.Sandberg@ARM.com return 0; 11869651SAndreas.Sandberg@ARM.com 11879651SAndreas.Sandberg@ARM.com DPRINTF(KvmIO, "KVM: Flushing the coalesced MMIO ring buffer\n"); 11889651SAndreas.Sandberg@ARM.com 11899651SAndreas.Sandberg@ARM.com // TODO: We might need to do synchronization when we start to 11909651SAndreas.Sandberg@ARM.com // support multiple CPUs 11919651SAndreas.Sandberg@ARM.com Tick ticks(0); 11929651SAndreas.Sandberg@ARM.com while (mmioRing->first != mmioRing->last) { 11939651SAndreas.Sandberg@ARM.com struct kvm_coalesced_mmio &ent( 11949651SAndreas.Sandberg@ARM.com mmioRing->coalesced_mmio[mmioRing->first]); 11959651SAndreas.Sandberg@ARM.com 11969651SAndreas.Sandberg@ARM.com DPRINTF(KvmIO, "KVM: Handling coalesced MMIO (addr: 0x%x, len: %u)\n", 11979651SAndreas.Sandberg@ARM.com ent.phys_addr, ent.len); 11989651SAndreas.Sandberg@ARM.com 11999651SAndreas.Sandberg@ARM.com ++numCoalescedMMIO; 12009651SAndreas.Sandberg@ARM.com ticks += doMMIOAccess(ent.phys_addr, ent.data, ent.len, true); 12019651SAndreas.Sandberg@ARM.com 12029651SAndreas.Sandberg@ARM.com mmioRing->first = (mmioRing->first + 1) % KVM_COALESCED_MMIO_MAX; 12039651SAndreas.Sandberg@ARM.com } 12049651SAndreas.Sandberg@ARM.com 12059651SAndreas.Sandberg@ARM.com return ticks; 12069651SAndreas.Sandberg@ARM.com} 12079651SAndreas.Sandberg@ARM.com 12089892Sandreas@sandberg.pp.se/** 120910114Sandreas@sandberg.pp.se * Dummy handler for KVM kick signals. 121010073Sandreas@sandberg.pp.se * 121110114Sandreas@sandberg.pp.se * @note This function is usually not called since the kernel doesn't 121210073Sandreas@sandberg.pp.se * seem to deliver signals when the signal is only unmasked when 121310073Sandreas@sandberg.pp.se * running in KVM. This doesn't matter though since we are only 121410073Sandreas@sandberg.pp.se * interested in getting KVM to exit, which happens as expected. See 121510073Sandreas@sandberg.pp.se * setupSignalHandler() and kvmRun() for details about KVM signal 121610073Sandreas@sandberg.pp.se * handling. 12179892Sandreas@sandberg.pp.se */ 12189892Sandreas@sandberg.pp.sestatic void 121910114Sandreas@sandberg.pp.seonKickSignal(int signo, siginfo_t *si, void *data) 12209892Sandreas@sandberg.pp.se{ 12219892Sandreas@sandberg.pp.se} 12229892Sandreas@sandberg.pp.se 12239651SAndreas.Sandberg@ARM.comvoid 12249651SAndreas.Sandberg@ARM.comBaseKvmCPU::setupSignalHandler() 12259651SAndreas.Sandberg@ARM.com{ 12269651SAndreas.Sandberg@ARM.com struct sigaction sa; 12279651SAndreas.Sandberg@ARM.com 12289651SAndreas.Sandberg@ARM.com memset(&sa, 0, sizeof(sa)); 122910114Sandreas@sandberg.pp.se sa.sa_sigaction = onKickSignal; 12309651SAndreas.Sandberg@ARM.com sa.sa_flags = SA_SIGINFO | SA_RESTART; 123110114Sandreas@sandberg.pp.se if (sigaction(KVM_KICK_SIGNAL, &sa, NULL) == -1) 12329892Sandreas@sandberg.pp.se panic("KVM: Failed to setup vCPU timer signal handler\n"); 12339892Sandreas@sandberg.pp.se 12349753Sandreas@sandberg.pp.se sigset_t sigset; 123510073Sandreas@sandberg.pp.se if (pthread_sigmask(SIG_BLOCK, NULL, &sigset) == -1) 12369753Sandreas@sandberg.pp.se panic("KVM: Failed get signal mask\n"); 12379753Sandreas@sandberg.pp.se 12389753Sandreas@sandberg.pp.se // Request KVM to setup the same signal mask as we're currently 123910114Sandreas@sandberg.pp.se // running with except for the KVM control signal. We'll sometimes 124010114Sandreas@sandberg.pp.se // need to raise the KVM_KICK_SIGNAL to cause immediate exits from 124110114Sandreas@sandberg.pp.se // KVM after servicing IO requests. See kvmRun(). 124210114Sandreas@sandberg.pp.se sigdelset(&sigset, KVM_KICK_SIGNAL); 12439753Sandreas@sandberg.pp.se setSignalMask(&sigset); 12449753Sandreas@sandberg.pp.se 12459892Sandreas@sandberg.pp.se // Mask our control signals so they aren't delivered unless we're 12469753Sandreas@sandberg.pp.se // actually executing inside KVM. 124710114Sandreas@sandberg.pp.se sigaddset(&sigset, KVM_KICK_SIGNAL); 124810073Sandreas@sandberg.pp.se if (pthread_sigmask(SIG_SETMASK, &sigset, NULL) == -1) 12499892Sandreas@sandberg.pp.se panic("KVM: Failed mask the KVM control signals\n"); 12509753Sandreas@sandberg.pp.se} 12519753Sandreas@sandberg.pp.se 12529753Sandreas@sandberg.pp.sebool 12539753Sandreas@sandberg.pp.seBaseKvmCPU::discardPendingSignal(int signum) const 12549753Sandreas@sandberg.pp.se{ 12559753Sandreas@sandberg.pp.se int discardedSignal; 12569753Sandreas@sandberg.pp.se 12579753Sandreas@sandberg.pp.se // Setting the timeout to zero causes sigtimedwait to return 12589753Sandreas@sandberg.pp.se // immediately. 12599753Sandreas@sandberg.pp.se struct timespec timeout; 12609753Sandreas@sandberg.pp.se timeout.tv_sec = 0; 12619753Sandreas@sandberg.pp.se timeout.tv_nsec = 0; 12629753Sandreas@sandberg.pp.se 12639753Sandreas@sandberg.pp.se sigset_t sigset; 12649753Sandreas@sandberg.pp.se sigemptyset(&sigset); 12659753Sandreas@sandberg.pp.se sigaddset(&sigset, signum); 12669753Sandreas@sandberg.pp.se 12679753Sandreas@sandberg.pp.se do { 12689753Sandreas@sandberg.pp.se discardedSignal = sigtimedwait(&sigset, NULL, &timeout); 12699753Sandreas@sandberg.pp.se } while (discardedSignal == -1 && errno == EINTR); 12709753Sandreas@sandberg.pp.se 12719753Sandreas@sandberg.pp.se if (discardedSignal == signum) 12729753Sandreas@sandberg.pp.se return true; 12739753Sandreas@sandberg.pp.se else if (discardedSignal == -1 && errno == EAGAIN) 12749753Sandreas@sandberg.pp.se return false; 12759753Sandreas@sandberg.pp.se else 12769753Sandreas@sandberg.pp.se panic("Unexpected return value from sigtimedwait: %i (errno: %i)\n", 12779753Sandreas@sandberg.pp.se discardedSignal, errno); 12789651SAndreas.Sandberg@ARM.com} 12799651SAndreas.Sandberg@ARM.com 12809651SAndreas.Sandberg@ARM.comvoid 12819651SAndreas.Sandberg@ARM.comBaseKvmCPU::setupCounters() 12829651SAndreas.Sandberg@ARM.com{ 12839651SAndreas.Sandberg@ARM.com DPRINTF(Kvm, "Attaching cycle counter...\n"); 12849651SAndreas.Sandberg@ARM.com PerfKvmCounterConfig cfgCycles(PERF_TYPE_HARDWARE, 12859651SAndreas.Sandberg@ARM.com PERF_COUNT_HW_CPU_CYCLES); 12869651SAndreas.Sandberg@ARM.com cfgCycles.disabled(true) 12879651SAndreas.Sandberg@ARM.com .pinned(true); 12889655SAndreas.Sandberg@ARM.com 12899986Sandreas@sandberg.pp.se // Try to exclude the host. We set both exclude_hv and 12909986Sandreas@sandberg.pp.se // exclude_host since different architectures use slightly 12919986Sandreas@sandberg.pp.se // different APIs in the kernel. 12929986Sandreas@sandberg.pp.se cfgCycles.exclude_hv(true) 12939986Sandreas@sandberg.pp.se .exclude_host(true); 12949986Sandreas@sandberg.pp.se 12959655SAndreas.Sandberg@ARM.com if (perfControlledByTimer) { 12969655SAndreas.Sandberg@ARM.com // We need to configure the cycles counter to send overflows 12979655SAndreas.Sandberg@ARM.com // since we are going to use it to trigger timer signals that 12989655SAndreas.Sandberg@ARM.com // trap back into m5 from KVM. In practice, this means that we 12999655SAndreas.Sandberg@ARM.com // need to set some non-zero sample period that gets 13009655SAndreas.Sandberg@ARM.com // overridden when the timer is armed. 13019655SAndreas.Sandberg@ARM.com cfgCycles.wakeupEvents(1) 13029655SAndreas.Sandberg@ARM.com .samplePeriod(42); 13039655SAndreas.Sandberg@ARM.com } 13049655SAndreas.Sandberg@ARM.com 13059651SAndreas.Sandberg@ARM.com hwCycles.attach(cfgCycles, 13069651SAndreas.Sandberg@ARM.com 0); // TID (0 => currentThread) 13079651SAndreas.Sandberg@ARM.com 13089892Sandreas@sandberg.pp.se setupInstCounter(); 13099651SAndreas.Sandberg@ARM.com} 13109753Sandreas@sandberg.pp.se 13119753Sandreas@sandberg.pp.sebool 13129753Sandreas@sandberg.pp.seBaseKvmCPU::tryDrain() 13139753Sandreas@sandberg.pp.se{ 131410913Sandreas.sandberg@arm.com if (drainState() != DrainState::Draining) 13159753Sandreas@sandberg.pp.se return false; 13169753Sandreas@sandberg.pp.se 13179753Sandreas@sandberg.pp.se if (!archIsDrained()) { 13189753Sandreas@sandberg.pp.se DPRINTF(Drain, "tryDrain: Architecture code is not ready.\n"); 13199753Sandreas@sandberg.pp.se return false; 13209753Sandreas@sandberg.pp.se } 13219753Sandreas@sandberg.pp.se 13229753Sandreas@sandberg.pp.se if (_status == Idle || _status == Running) { 13239753Sandreas@sandberg.pp.se DPRINTF(Drain, 13249753Sandreas@sandberg.pp.se "tryDrain: CPU transitioned into the Idle state, drain done\n"); 132510913Sandreas.sandberg@arm.com signalDrainDone(); 13269753Sandreas@sandberg.pp.se return true; 13279753Sandreas@sandberg.pp.se } else { 13289753Sandreas@sandberg.pp.se DPRINTF(Drain, "tryDrain: CPU not ready.\n"); 13299753Sandreas@sandberg.pp.se return false; 13309753Sandreas@sandberg.pp.se } 13319753Sandreas@sandberg.pp.se} 13329753Sandreas@sandberg.pp.se 13339753Sandreas@sandberg.pp.sevoid 13349753Sandreas@sandberg.pp.seBaseKvmCPU::ioctlRun() 13359753Sandreas@sandberg.pp.se{ 13369753Sandreas@sandberg.pp.se if (ioctl(KVM_RUN) == -1) { 13379753Sandreas@sandberg.pp.se if (errno != EINTR) 13389753Sandreas@sandberg.pp.se panic("KVM: Failed to start virtual CPU (errno: %i)\n", 13399753Sandreas@sandberg.pp.se errno); 13409753Sandreas@sandberg.pp.se } 13419753Sandreas@sandberg.pp.se} 13429892Sandreas@sandberg.pp.se 13439892Sandreas@sandberg.pp.sevoid 13449892Sandreas@sandberg.pp.seBaseKvmCPU::setupInstStop() 13459892Sandreas@sandberg.pp.se{ 13469892Sandreas@sandberg.pp.se if (comInstEventQueue[0]->empty()) { 13479892Sandreas@sandberg.pp.se setupInstCounter(0); 13489892Sandreas@sandberg.pp.se } else { 13499892Sandreas@sandberg.pp.se const uint64_t next(comInstEventQueue[0]->nextTick()); 13509892Sandreas@sandberg.pp.se 13519892Sandreas@sandberg.pp.se assert(next > ctrInsts); 13529892Sandreas@sandberg.pp.se setupInstCounter(next - ctrInsts); 13539892Sandreas@sandberg.pp.se } 13549892Sandreas@sandberg.pp.se} 13559892Sandreas@sandberg.pp.se 13569892Sandreas@sandberg.pp.sevoid 13579892Sandreas@sandberg.pp.seBaseKvmCPU::setupInstCounter(uint64_t period) 13589892Sandreas@sandberg.pp.se{ 13599892Sandreas@sandberg.pp.se // No need to do anything if we aren't attaching for the first 13609892Sandreas@sandberg.pp.se // time or the period isn't changing. 13619892Sandreas@sandberg.pp.se if (period == activeInstPeriod && hwInstructions.attached()) 13629892Sandreas@sandberg.pp.se return; 13639892Sandreas@sandberg.pp.se 13649892Sandreas@sandberg.pp.se PerfKvmCounterConfig cfgInstructions(PERF_TYPE_HARDWARE, 13659892Sandreas@sandberg.pp.se PERF_COUNT_HW_INSTRUCTIONS); 13669892Sandreas@sandberg.pp.se 13679986Sandreas@sandberg.pp.se // Try to exclude the host. We set both exclude_hv and 13689986Sandreas@sandberg.pp.se // exclude_host since different architectures use slightly 13699986Sandreas@sandberg.pp.se // different APIs in the kernel. 13709986Sandreas@sandberg.pp.se cfgInstructions.exclude_hv(true) 13719986Sandreas@sandberg.pp.se .exclude_host(true); 13729986Sandreas@sandberg.pp.se 13739892Sandreas@sandberg.pp.se if (period) { 13749892Sandreas@sandberg.pp.se // Setup a sampling counter if that has been requested. 13759892Sandreas@sandberg.pp.se cfgInstructions.wakeupEvents(1) 13769892Sandreas@sandberg.pp.se .samplePeriod(period); 13779892Sandreas@sandberg.pp.se } 13789892Sandreas@sandberg.pp.se 13799892Sandreas@sandberg.pp.se // We need to detach and re-attach the counter to reliably change 13809892Sandreas@sandberg.pp.se // sampling settings. See PerfKvmCounter::period() for details. 13819892Sandreas@sandberg.pp.se if (hwInstructions.attached()) 13829892Sandreas@sandberg.pp.se hwInstructions.detach(); 13839892Sandreas@sandberg.pp.se assert(hwCycles.attached()); 13849892Sandreas@sandberg.pp.se hwInstructions.attach(cfgInstructions, 13859892Sandreas@sandberg.pp.se 0, // TID (0 => currentThread) 13869892Sandreas@sandberg.pp.se hwCycles); 13879892Sandreas@sandberg.pp.se 13889892Sandreas@sandberg.pp.se if (period) 138910114Sandreas@sandberg.pp.se hwInstructions.enableSignals(KVM_KICK_SIGNAL); 13909892Sandreas@sandberg.pp.se 13919892Sandreas@sandberg.pp.se activeInstPeriod = period; 13929892Sandreas@sandberg.pp.se} 1393