base.cc revision 9753
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 499651SAndreas.Sandberg@ARM.com#include "arch/utility.hh" 509651SAndreas.Sandberg@ARM.com#include "cpu/kvm/base.hh" 519683Sandreas@sandberg.pp.se#include "debug/Checkpoint.hh" 529753Sandreas@sandberg.pp.se#include "debug/Drain.hh" 539651SAndreas.Sandberg@ARM.com#include "debug/Kvm.hh" 549651SAndreas.Sandberg@ARM.com#include "debug/KvmIO.hh" 559651SAndreas.Sandberg@ARM.com#include "debug/KvmRun.hh" 569651SAndreas.Sandberg@ARM.com#include "params/BaseKvmCPU.hh" 579651SAndreas.Sandberg@ARM.com#include "sim/process.hh" 589651SAndreas.Sandberg@ARM.com#include "sim/system.hh" 599651SAndreas.Sandberg@ARM.com 609753Sandreas@sandberg.pp.se#include <signal.h> 619753Sandreas@sandberg.pp.se 629651SAndreas.Sandberg@ARM.com/* Used by some KVM macros */ 639651SAndreas.Sandberg@ARM.com#define PAGE_SIZE pageSize 649651SAndreas.Sandberg@ARM.com 659651SAndreas.Sandberg@ARM.comvolatile bool timerOverflowed = false; 669651SAndreas.Sandberg@ARM.com 679651SAndreas.Sandberg@ARM.comstatic void 689651SAndreas.Sandberg@ARM.comonTimerOverflow(int signo, siginfo_t *si, void *data) 699651SAndreas.Sandberg@ARM.com{ 709651SAndreas.Sandberg@ARM.com timerOverflowed = true; 719651SAndreas.Sandberg@ARM.com} 729651SAndreas.Sandberg@ARM.com 739651SAndreas.Sandberg@ARM.comBaseKvmCPU::BaseKvmCPU(BaseKvmCPUParams *params) 749651SAndreas.Sandberg@ARM.com : BaseCPU(params), 759651SAndreas.Sandberg@ARM.com vm(*params->kvmVM), 769651SAndreas.Sandberg@ARM.com _status(Idle), 779651SAndreas.Sandberg@ARM.com dataPort(name() + ".dcache_port", this), 789651SAndreas.Sandberg@ARM.com instPort(name() + ".icache_port", this), 799652SAndreas.Sandberg@ARM.com threadContextDirty(true), 809652SAndreas.Sandberg@ARM.com kvmStateDirty(false), 819651SAndreas.Sandberg@ARM.com vcpuID(vm.allocVCPUID()), vcpuFD(-1), vcpuMMapSize(0), 829651SAndreas.Sandberg@ARM.com _kvmRun(NULL), mmioRing(NULL), 839651SAndreas.Sandberg@ARM.com pageSize(sysconf(_SC_PAGE_SIZE)), 849651SAndreas.Sandberg@ARM.com tickEvent(*this), 859655SAndreas.Sandberg@ARM.com perfControlledByTimer(params->usePerfOverflow), 869752Sandreas@sandberg.pp.se hostFactor(params->hostFactor), 879753Sandreas@sandberg.pp.se drainManager(NULL), 889752Sandreas@sandberg.pp.se ctrInsts(0) 899651SAndreas.Sandberg@ARM.com{ 909651SAndreas.Sandberg@ARM.com if (pageSize == -1) 919651SAndreas.Sandberg@ARM.com panic("KVM: Failed to determine host page size (%i)\n", 929651SAndreas.Sandberg@ARM.com errno); 939651SAndreas.Sandberg@ARM.com 949651SAndreas.Sandberg@ARM.com thread = new SimpleThread(this, 0, params->system, 959651SAndreas.Sandberg@ARM.com params->itb, params->dtb, params->isa[0]); 969651SAndreas.Sandberg@ARM.com thread->setStatus(ThreadContext::Halted); 979651SAndreas.Sandberg@ARM.com tc = thread->getTC(); 989651SAndreas.Sandberg@ARM.com threadContexts.push_back(tc); 999651SAndreas.Sandberg@ARM.com 1009651SAndreas.Sandberg@ARM.com setupCounters(); 1019651SAndreas.Sandberg@ARM.com 1029655SAndreas.Sandberg@ARM.com if (params->usePerfOverflow) 1039655SAndreas.Sandberg@ARM.com runTimer.reset(new PerfKvmTimer(hwCycles, 1049655SAndreas.Sandberg@ARM.com KVM_TIMER_SIGNAL, 1059655SAndreas.Sandberg@ARM.com params->hostFactor, 1069655SAndreas.Sandberg@ARM.com params->clock)); 1079655SAndreas.Sandberg@ARM.com else 1089655SAndreas.Sandberg@ARM.com runTimer.reset(new PosixKvmTimer(KVM_TIMER_SIGNAL, CLOCK_MONOTONIC, 1099655SAndreas.Sandberg@ARM.com params->hostFactor, 1109655SAndreas.Sandberg@ARM.com params->clock)); 1119651SAndreas.Sandberg@ARM.com} 1129651SAndreas.Sandberg@ARM.com 1139651SAndreas.Sandberg@ARM.comBaseKvmCPU::~BaseKvmCPU() 1149651SAndreas.Sandberg@ARM.com{ 1159651SAndreas.Sandberg@ARM.com if (_kvmRun) 1169651SAndreas.Sandberg@ARM.com munmap(_kvmRun, vcpuMMapSize); 1179651SAndreas.Sandberg@ARM.com close(vcpuFD); 1189651SAndreas.Sandberg@ARM.com} 1199651SAndreas.Sandberg@ARM.com 1209651SAndreas.Sandberg@ARM.comvoid 1219651SAndreas.Sandberg@ARM.comBaseKvmCPU::init() 1229651SAndreas.Sandberg@ARM.com{ 1239651SAndreas.Sandberg@ARM.com BaseCPU::init(); 1249651SAndreas.Sandberg@ARM.com 1259651SAndreas.Sandberg@ARM.com if (numThreads != 1) 1269651SAndreas.Sandberg@ARM.com fatal("KVM: Multithreading not supported"); 1279651SAndreas.Sandberg@ARM.com 1289651SAndreas.Sandberg@ARM.com tc->initMemProxies(tc); 1299651SAndreas.Sandberg@ARM.com 1309651SAndreas.Sandberg@ARM.com // initialize CPU, including PC 1319651SAndreas.Sandberg@ARM.com if (FullSystem && !switchedOut()) 1329651SAndreas.Sandberg@ARM.com TheISA::initCPU(tc, tc->contextId()); 1339651SAndreas.Sandberg@ARM.com 1349651SAndreas.Sandberg@ARM.com mmio_req.setThreadContext(tc->contextId(), 0); 1359651SAndreas.Sandberg@ARM.com} 1369651SAndreas.Sandberg@ARM.com 1379651SAndreas.Sandberg@ARM.comvoid 1389651SAndreas.Sandberg@ARM.comBaseKvmCPU::startup() 1399651SAndreas.Sandberg@ARM.com{ 1409690Sandreas@sandberg.pp.se const BaseKvmCPUParams * const p( 1419690Sandreas@sandberg.pp.se dynamic_cast<const BaseKvmCPUParams *>(params())); 1429690Sandreas@sandberg.pp.se 1439651SAndreas.Sandberg@ARM.com Kvm &kvm(vm.kvm); 1449651SAndreas.Sandberg@ARM.com 1459651SAndreas.Sandberg@ARM.com BaseCPU::startup(); 1469651SAndreas.Sandberg@ARM.com 1479651SAndreas.Sandberg@ARM.com assert(vcpuFD == -1); 1489651SAndreas.Sandberg@ARM.com 1499651SAndreas.Sandberg@ARM.com // Tell the VM that a CPU is about to start. 1509651SAndreas.Sandberg@ARM.com vm.cpuStartup(); 1519651SAndreas.Sandberg@ARM.com 1529651SAndreas.Sandberg@ARM.com // We can't initialize KVM CPUs in BaseKvmCPU::init() since we are 1539651SAndreas.Sandberg@ARM.com // not guaranteed that the parent KVM VM has initialized at that 1549651SAndreas.Sandberg@ARM.com // point. Initialize virtual CPUs here instead. 1559651SAndreas.Sandberg@ARM.com vcpuFD = vm.createVCPU(vcpuID); 1569651SAndreas.Sandberg@ARM.com 1579753Sandreas@sandberg.pp.se // Setup signal handlers. This has to be done after the vCPU is 1589753Sandreas@sandberg.pp.se // created since it manipulates the vCPU signal mask. 1599753Sandreas@sandberg.pp.se setupSignalHandler(); 1609753Sandreas@sandberg.pp.se 1619651SAndreas.Sandberg@ARM.com // Map the KVM run structure */ 1629651SAndreas.Sandberg@ARM.com vcpuMMapSize = kvm.getVCPUMMapSize(); 1639651SAndreas.Sandberg@ARM.com _kvmRun = (struct kvm_run *)mmap(0, vcpuMMapSize, 1649651SAndreas.Sandberg@ARM.com PROT_READ | PROT_WRITE, MAP_SHARED, 1659651SAndreas.Sandberg@ARM.com vcpuFD, 0); 1669651SAndreas.Sandberg@ARM.com if (_kvmRun == MAP_FAILED) 1679651SAndreas.Sandberg@ARM.com panic("KVM: Failed to map run data structure\n"); 1689651SAndreas.Sandberg@ARM.com 1699651SAndreas.Sandberg@ARM.com // Setup a pointer to the MMIO ring buffer if coalesced MMIO is 1709651SAndreas.Sandberg@ARM.com // available. The offset into the KVM's communication page is 1719651SAndreas.Sandberg@ARM.com // provided by the coalesced MMIO capability. 1729651SAndreas.Sandberg@ARM.com int mmioOffset(kvm.capCoalescedMMIO()); 1739690Sandreas@sandberg.pp.se if (!p->useCoalescedMMIO) { 1749690Sandreas@sandberg.pp.se inform("KVM: Coalesced MMIO disabled by config.\n"); 1759690Sandreas@sandberg.pp.se } else if (mmioOffset) { 1769651SAndreas.Sandberg@ARM.com inform("KVM: Coalesced IO available\n"); 1779651SAndreas.Sandberg@ARM.com mmioRing = (struct kvm_coalesced_mmio_ring *)( 1789651SAndreas.Sandberg@ARM.com (char *)_kvmRun + (mmioOffset * pageSize)); 1799651SAndreas.Sandberg@ARM.com } else { 1809651SAndreas.Sandberg@ARM.com inform("KVM: Coalesced not supported by host OS\n"); 1819651SAndreas.Sandberg@ARM.com } 1829732Sandreas@sandberg.pp.se 1839732Sandreas@sandberg.pp.se thread->startup(); 1849651SAndreas.Sandberg@ARM.com} 1859651SAndreas.Sandberg@ARM.com 1869651SAndreas.Sandberg@ARM.comvoid 1879651SAndreas.Sandberg@ARM.comBaseKvmCPU::regStats() 1889651SAndreas.Sandberg@ARM.com{ 1899651SAndreas.Sandberg@ARM.com using namespace Stats; 1909651SAndreas.Sandberg@ARM.com 1919651SAndreas.Sandberg@ARM.com BaseCPU::regStats(); 1929651SAndreas.Sandberg@ARM.com 1939684Sandreas@sandberg.pp.se numInsts 1949684Sandreas@sandberg.pp.se .name(name() + ".committedInsts") 1959684Sandreas@sandberg.pp.se .desc("Number of instructions committed") 1969684Sandreas@sandberg.pp.se ; 1979684Sandreas@sandberg.pp.se 1989651SAndreas.Sandberg@ARM.com numVMExits 1999651SAndreas.Sandberg@ARM.com .name(name() + ".numVMExits") 2009651SAndreas.Sandberg@ARM.com .desc("total number of KVM exits") 2019651SAndreas.Sandberg@ARM.com ; 2029651SAndreas.Sandberg@ARM.com 2039651SAndreas.Sandberg@ARM.com numMMIO 2049651SAndreas.Sandberg@ARM.com .name(name() + ".numMMIO") 2059651SAndreas.Sandberg@ARM.com .desc("number of VM exits due to memory mapped IO") 2069651SAndreas.Sandberg@ARM.com ; 2079651SAndreas.Sandberg@ARM.com 2089651SAndreas.Sandberg@ARM.com numCoalescedMMIO 2099651SAndreas.Sandberg@ARM.com .name(name() + ".numCoalescedMMIO") 2109651SAndreas.Sandberg@ARM.com .desc("number of coalesced memory mapped IO requests") 2119651SAndreas.Sandberg@ARM.com ; 2129651SAndreas.Sandberg@ARM.com 2139651SAndreas.Sandberg@ARM.com numIO 2149651SAndreas.Sandberg@ARM.com .name(name() + ".numIO") 2159651SAndreas.Sandberg@ARM.com .desc("number of VM exits due to legacy IO") 2169651SAndreas.Sandberg@ARM.com ; 2179651SAndreas.Sandberg@ARM.com 2189651SAndreas.Sandberg@ARM.com numHalt 2199651SAndreas.Sandberg@ARM.com .name(name() + ".numHalt") 2209651SAndreas.Sandberg@ARM.com .desc("number of VM exits due to wait for interrupt instructions") 2219651SAndreas.Sandberg@ARM.com ; 2229651SAndreas.Sandberg@ARM.com 2239651SAndreas.Sandberg@ARM.com numInterrupts 2249651SAndreas.Sandberg@ARM.com .name(name() + ".numInterrupts") 2259651SAndreas.Sandberg@ARM.com .desc("number of interrupts delivered") 2269651SAndreas.Sandberg@ARM.com ; 2279651SAndreas.Sandberg@ARM.com 2289651SAndreas.Sandberg@ARM.com numHypercalls 2299651SAndreas.Sandberg@ARM.com .name(name() + ".numHypercalls") 2309651SAndreas.Sandberg@ARM.com .desc("number of hypercalls") 2319651SAndreas.Sandberg@ARM.com ; 2329651SAndreas.Sandberg@ARM.com} 2339651SAndreas.Sandberg@ARM.com 2349651SAndreas.Sandberg@ARM.comvoid 2359651SAndreas.Sandberg@ARM.comBaseKvmCPU::serializeThread(std::ostream &os, ThreadID tid) 2369651SAndreas.Sandberg@ARM.com{ 2379683Sandreas@sandberg.pp.se if (DTRACE(Checkpoint)) { 2389683Sandreas@sandberg.pp.se DPRINTF(Checkpoint, "KVM: Serializing thread %i:\n", tid); 2399683Sandreas@sandberg.pp.se dump(); 2409683Sandreas@sandberg.pp.se } 2419683Sandreas@sandberg.pp.se 2429651SAndreas.Sandberg@ARM.com assert(tid == 0); 2439651SAndreas.Sandberg@ARM.com assert(_status == Idle); 2449651SAndreas.Sandberg@ARM.com thread->serialize(os); 2459651SAndreas.Sandberg@ARM.com} 2469651SAndreas.Sandberg@ARM.com 2479651SAndreas.Sandberg@ARM.comvoid 2489651SAndreas.Sandberg@ARM.comBaseKvmCPU::unserializeThread(Checkpoint *cp, const std::string §ion, 2499651SAndreas.Sandberg@ARM.com ThreadID tid) 2509651SAndreas.Sandberg@ARM.com{ 2519683Sandreas@sandberg.pp.se DPRINTF(Checkpoint, "KVM: Unserialize thread %i:\n", tid); 2529683Sandreas@sandberg.pp.se 2539651SAndreas.Sandberg@ARM.com assert(tid == 0); 2549651SAndreas.Sandberg@ARM.com assert(_status == Idle); 2559651SAndreas.Sandberg@ARM.com thread->unserialize(cp, section); 2569652SAndreas.Sandberg@ARM.com threadContextDirty = true; 2579651SAndreas.Sandberg@ARM.com} 2589651SAndreas.Sandberg@ARM.com 2599651SAndreas.Sandberg@ARM.comunsigned int 2609651SAndreas.Sandberg@ARM.comBaseKvmCPU::drain(DrainManager *dm) 2619651SAndreas.Sandberg@ARM.com{ 2629651SAndreas.Sandberg@ARM.com if (switchedOut()) 2639651SAndreas.Sandberg@ARM.com return 0; 2649651SAndreas.Sandberg@ARM.com 2659753Sandreas@sandberg.pp.se DPRINTF(Drain, "BaseKvmCPU::drain\n"); 2669753Sandreas@sandberg.pp.se switch (_status) { 2679753Sandreas@sandberg.pp.se case Running: 2689753Sandreas@sandberg.pp.se // The base KVM code is normally ready when it is in the 2699753Sandreas@sandberg.pp.se // Running state, but the architecture specific code might be 2709753Sandreas@sandberg.pp.se // of a different opinion. This may happen when the CPU been 2719753Sandreas@sandberg.pp.se // notified of an event that hasn't been accepted by the vCPU 2729753Sandreas@sandberg.pp.se // yet. 2739753Sandreas@sandberg.pp.se if (!archIsDrained()) { 2749753Sandreas@sandberg.pp.se drainManager = dm; 2759753Sandreas@sandberg.pp.se return 1; 2769753Sandreas@sandberg.pp.se } 2779651SAndreas.Sandberg@ARM.com 2789753Sandreas@sandberg.pp.se // The state of the CPU is consistent, so we don't need to do 2799753Sandreas@sandberg.pp.se // anything special to drain it. We simply de-schedule the 2809753Sandreas@sandberg.pp.se // tick event and enter the Idle state to prevent nasty things 2819753Sandreas@sandberg.pp.se // like MMIOs from happening. 2829753Sandreas@sandberg.pp.se if (tickEvent.scheduled()) 2839753Sandreas@sandberg.pp.se deschedule(tickEvent); 2849753Sandreas@sandberg.pp.se _status = Idle; 2859651SAndreas.Sandberg@ARM.com 2869753Sandreas@sandberg.pp.se /** FALLTHROUGH */ 2879753Sandreas@sandberg.pp.se case Idle: 2889753Sandreas@sandberg.pp.se // Idle, no need to drain 2899753Sandreas@sandberg.pp.se assert(!tickEvent.scheduled()); 2909753Sandreas@sandberg.pp.se 2919753Sandreas@sandberg.pp.se // Sync the thread context here since we'll need it when we 2929753Sandreas@sandberg.pp.se // switch CPUs or checkpoint the CPU. 2939753Sandreas@sandberg.pp.se syncThreadContext(); 2949753Sandreas@sandberg.pp.se 2959753Sandreas@sandberg.pp.se return 0; 2969753Sandreas@sandberg.pp.se 2979753Sandreas@sandberg.pp.se case RunningServiceCompletion: 2989753Sandreas@sandberg.pp.se // The CPU has just requested a service that was handled in 2999753Sandreas@sandberg.pp.se // the RunningService state, but the results have still not 3009753Sandreas@sandberg.pp.se // been reported to the CPU. Now, we /could/ probably just 3019753Sandreas@sandberg.pp.se // update the register state ourselves instead of letting KVM 3029753Sandreas@sandberg.pp.se // handle it, but that would be tricky. Instead, we enter KVM 3039753Sandreas@sandberg.pp.se // and let it do its stuff. 3049753Sandreas@sandberg.pp.se drainManager = dm; 3059753Sandreas@sandberg.pp.se 3069753Sandreas@sandberg.pp.se DPRINTF(Drain, "KVM CPU is waiting for service completion, " 3079753Sandreas@sandberg.pp.se "requesting drain.\n"); 3089753Sandreas@sandberg.pp.se return 1; 3099753Sandreas@sandberg.pp.se 3109753Sandreas@sandberg.pp.se case RunningService: 3119753Sandreas@sandberg.pp.se // We need to drain since the CPU is waiting for service (e.g., MMIOs) 3129753Sandreas@sandberg.pp.se drainManager = dm; 3139753Sandreas@sandberg.pp.se 3149753Sandreas@sandberg.pp.se DPRINTF(Drain, "KVM CPU is waiting for service, requesting drain.\n"); 3159753Sandreas@sandberg.pp.se return 1; 3169753Sandreas@sandberg.pp.se 3179753Sandreas@sandberg.pp.se default: 3189753Sandreas@sandberg.pp.se panic("KVM: Unhandled CPU state in drain()\n"); 3199753Sandreas@sandberg.pp.se return 0; 3209753Sandreas@sandberg.pp.se } 3219651SAndreas.Sandberg@ARM.com} 3229651SAndreas.Sandberg@ARM.com 3239651SAndreas.Sandberg@ARM.comvoid 3249651SAndreas.Sandberg@ARM.comBaseKvmCPU::drainResume() 3259651SAndreas.Sandberg@ARM.com{ 3269651SAndreas.Sandberg@ARM.com assert(!tickEvent.scheduled()); 3279651SAndreas.Sandberg@ARM.com 3289651SAndreas.Sandberg@ARM.com // We might have been switched out. In that case, we don't need to 3299651SAndreas.Sandberg@ARM.com // do anything. 3309651SAndreas.Sandberg@ARM.com if (switchedOut()) 3319651SAndreas.Sandberg@ARM.com return; 3329651SAndreas.Sandberg@ARM.com 3339651SAndreas.Sandberg@ARM.com DPRINTF(Kvm, "drainResume\n"); 3349651SAndreas.Sandberg@ARM.com verifyMemoryMode(); 3359651SAndreas.Sandberg@ARM.com 3369651SAndreas.Sandberg@ARM.com // The tick event is de-scheduled as a part of the draining 3379651SAndreas.Sandberg@ARM.com // process. Re-schedule it if the thread context is active. 3389651SAndreas.Sandberg@ARM.com if (tc->status() == ThreadContext::Active) { 3399651SAndreas.Sandberg@ARM.com schedule(tickEvent, nextCycle()); 3409651SAndreas.Sandberg@ARM.com _status = Running; 3419651SAndreas.Sandberg@ARM.com } else { 3429651SAndreas.Sandberg@ARM.com _status = Idle; 3439651SAndreas.Sandberg@ARM.com } 3449651SAndreas.Sandberg@ARM.com} 3459651SAndreas.Sandberg@ARM.com 3469651SAndreas.Sandberg@ARM.comvoid 3479651SAndreas.Sandberg@ARM.comBaseKvmCPU::switchOut() 3489651SAndreas.Sandberg@ARM.com{ 3499652SAndreas.Sandberg@ARM.com DPRINTF(Kvm, "switchOut\n"); 3509652SAndreas.Sandberg@ARM.com 3519651SAndreas.Sandberg@ARM.com BaseCPU::switchOut(); 3529651SAndreas.Sandberg@ARM.com 3539651SAndreas.Sandberg@ARM.com // We should have drained prior to executing a switchOut, which 3549651SAndreas.Sandberg@ARM.com // means that the tick event shouldn't be scheduled and the CPU is 3559651SAndreas.Sandberg@ARM.com // idle. 3569651SAndreas.Sandberg@ARM.com assert(!tickEvent.scheduled()); 3579651SAndreas.Sandberg@ARM.com assert(_status == Idle); 3589651SAndreas.Sandberg@ARM.com} 3599651SAndreas.Sandberg@ARM.com 3609651SAndreas.Sandberg@ARM.comvoid 3619651SAndreas.Sandberg@ARM.comBaseKvmCPU::takeOverFrom(BaseCPU *cpu) 3629651SAndreas.Sandberg@ARM.com{ 3639651SAndreas.Sandberg@ARM.com DPRINTF(Kvm, "takeOverFrom\n"); 3649651SAndreas.Sandberg@ARM.com 3659651SAndreas.Sandberg@ARM.com BaseCPU::takeOverFrom(cpu); 3669651SAndreas.Sandberg@ARM.com 3679651SAndreas.Sandberg@ARM.com // We should have drained prior to executing a switchOut, which 3689651SAndreas.Sandberg@ARM.com // means that the tick event shouldn't be scheduled and the CPU is 3699651SAndreas.Sandberg@ARM.com // idle. 3709651SAndreas.Sandberg@ARM.com assert(!tickEvent.scheduled()); 3719651SAndreas.Sandberg@ARM.com assert(_status == Idle); 3729651SAndreas.Sandberg@ARM.com assert(threadContexts.size() == 1); 3739651SAndreas.Sandberg@ARM.com 3749753Sandreas@sandberg.pp.se // Force an update of the KVM state here instead of flagging the 3759753Sandreas@sandberg.pp.se // TC as dirty. This is not ideal from a performance point of 3769753Sandreas@sandberg.pp.se // view, but it makes debugging easier as it allows meaningful KVM 3779753Sandreas@sandberg.pp.se // state to be dumped before and after a takeover. 3789753Sandreas@sandberg.pp.se updateKvmState(); 3799753Sandreas@sandberg.pp.se threadContextDirty = false; 3809651SAndreas.Sandberg@ARM.com} 3819651SAndreas.Sandberg@ARM.com 3829651SAndreas.Sandberg@ARM.comvoid 3839651SAndreas.Sandberg@ARM.comBaseKvmCPU::verifyMemoryMode() const 3849651SAndreas.Sandberg@ARM.com{ 3859651SAndreas.Sandberg@ARM.com if (!(system->isAtomicMode() && system->bypassCaches())) { 3869651SAndreas.Sandberg@ARM.com fatal("The KVM-based CPUs requires the memory system to be in the " 3879651SAndreas.Sandberg@ARM.com "'atomic_noncaching' mode.\n"); 3889651SAndreas.Sandberg@ARM.com } 3899651SAndreas.Sandberg@ARM.com} 3909651SAndreas.Sandberg@ARM.com 3919651SAndreas.Sandberg@ARM.comvoid 3929651SAndreas.Sandberg@ARM.comBaseKvmCPU::wakeup() 3939651SAndreas.Sandberg@ARM.com{ 3949651SAndreas.Sandberg@ARM.com DPRINTF(Kvm, "wakeup()\n"); 3959651SAndreas.Sandberg@ARM.com 3969651SAndreas.Sandberg@ARM.com if (thread->status() != ThreadContext::Suspended) 3979651SAndreas.Sandberg@ARM.com return; 3989651SAndreas.Sandberg@ARM.com 3999651SAndreas.Sandberg@ARM.com thread->activate(); 4009651SAndreas.Sandberg@ARM.com} 4019651SAndreas.Sandberg@ARM.com 4029651SAndreas.Sandberg@ARM.comvoid 4039651SAndreas.Sandberg@ARM.comBaseKvmCPU::activateContext(ThreadID thread_num, Cycles delay) 4049651SAndreas.Sandberg@ARM.com{ 4059651SAndreas.Sandberg@ARM.com DPRINTF(Kvm, "ActivateContext %d (%d cycles)\n", thread_num, delay); 4069651SAndreas.Sandberg@ARM.com 4079651SAndreas.Sandberg@ARM.com assert(thread_num == 0); 4089651SAndreas.Sandberg@ARM.com assert(thread); 4099651SAndreas.Sandberg@ARM.com 4109651SAndreas.Sandberg@ARM.com assert(_status == Idle); 4119651SAndreas.Sandberg@ARM.com assert(!tickEvent.scheduled()); 4129651SAndreas.Sandberg@ARM.com 4139651SAndreas.Sandberg@ARM.com numCycles += ticksToCycles(thread->lastActivate - thread->lastSuspend) 4149651SAndreas.Sandberg@ARM.com * hostFactor; 4159651SAndreas.Sandberg@ARM.com 4169651SAndreas.Sandberg@ARM.com schedule(tickEvent, clockEdge(delay)); 4179651SAndreas.Sandberg@ARM.com _status = Running; 4189651SAndreas.Sandberg@ARM.com} 4199651SAndreas.Sandberg@ARM.com 4209651SAndreas.Sandberg@ARM.com 4219651SAndreas.Sandberg@ARM.comvoid 4229651SAndreas.Sandberg@ARM.comBaseKvmCPU::suspendContext(ThreadID thread_num) 4239651SAndreas.Sandberg@ARM.com{ 4249651SAndreas.Sandberg@ARM.com DPRINTF(Kvm, "SuspendContext %d\n", thread_num); 4259651SAndreas.Sandberg@ARM.com 4269651SAndreas.Sandberg@ARM.com assert(thread_num == 0); 4279651SAndreas.Sandberg@ARM.com assert(thread); 4289651SAndreas.Sandberg@ARM.com 4299651SAndreas.Sandberg@ARM.com if (_status == Idle) 4309651SAndreas.Sandberg@ARM.com return; 4319651SAndreas.Sandberg@ARM.com 4329651SAndreas.Sandberg@ARM.com assert(_status == Running); 4339651SAndreas.Sandberg@ARM.com 4349651SAndreas.Sandberg@ARM.com // The tick event may no be scheduled if the quest has requested 4359651SAndreas.Sandberg@ARM.com // the monitor to wait for interrupts. The normal CPU models can 4369651SAndreas.Sandberg@ARM.com // get their tick events descheduled by quiesce instructions, but 4379651SAndreas.Sandberg@ARM.com // that can't happen here. 4389651SAndreas.Sandberg@ARM.com if (tickEvent.scheduled()) 4399651SAndreas.Sandberg@ARM.com deschedule(tickEvent); 4409651SAndreas.Sandberg@ARM.com 4419651SAndreas.Sandberg@ARM.com _status = Idle; 4429651SAndreas.Sandberg@ARM.com} 4439651SAndreas.Sandberg@ARM.com 4449651SAndreas.Sandberg@ARM.comvoid 4459651SAndreas.Sandberg@ARM.comBaseKvmCPU::deallocateContext(ThreadID thread_num) 4469651SAndreas.Sandberg@ARM.com{ 4479651SAndreas.Sandberg@ARM.com // for now, these are equivalent 4489651SAndreas.Sandberg@ARM.com suspendContext(thread_num); 4499651SAndreas.Sandberg@ARM.com} 4509651SAndreas.Sandberg@ARM.com 4519651SAndreas.Sandberg@ARM.comvoid 4529651SAndreas.Sandberg@ARM.comBaseKvmCPU::haltContext(ThreadID thread_num) 4539651SAndreas.Sandberg@ARM.com{ 4549651SAndreas.Sandberg@ARM.com // for now, these are equivalent 4559651SAndreas.Sandberg@ARM.com suspendContext(thread_num); 4569651SAndreas.Sandberg@ARM.com} 4579651SAndreas.Sandberg@ARM.com 4589652SAndreas.Sandberg@ARM.comThreadContext * 4599652SAndreas.Sandberg@ARM.comBaseKvmCPU::getContext(int tn) 4609652SAndreas.Sandberg@ARM.com{ 4619652SAndreas.Sandberg@ARM.com assert(tn == 0); 4629652SAndreas.Sandberg@ARM.com syncThreadContext(); 4639652SAndreas.Sandberg@ARM.com return tc; 4649652SAndreas.Sandberg@ARM.com} 4659652SAndreas.Sandberg@ARM.com 4669652SAndreas.Sandberg@ARM.com 4679651SAndreas.Sandberg@ARM.comCounter 4689651SAndreas.Sandberg@ARM.comBaseKvmCPU::totalInsts() const 4699651SAndreas.Sandberg@ARM.com{ 4709752Sandreas@sandberg.pp.se return ctrInsts; 4719651SAndreas.Sandberg@ARM.com} 4729651SAndreas.Sandberg@ARM.com 4739651SAndreas.Sandberg@ARM.comCounter 4749651SAndreas.Sandberg@ARM.comBaseKvmCPU::totalOps() const 4759651SAndreas.Sandberg@ARM.com{ 4769651SAndreas.Sandberg@ARM.com hack_once("Pretending totalOps is equivalent to totalInsts()\n"); 4779752Sandreas@sandberg.pp.se return ctrInsts; 4789651SAndreas.Sandberg@ARM.com} 4799651SAndreas.Sandberg@ARM.com 4809651SAndreas.Sandberg@ARM.comvoid 4819651SAndreas.Sandberg@ARM.comBaseKvmCPU::dump() 4829651SAndreas.Sandberg@ARM.com{ 4839651SAndreas.Sandberg@ARM.com inform("State dumping not implemented."); 4849651SAndreas.Sandberg@ARM.com} 4859651SAndreas.Sandberg@ARM.com 4869651SAndreas.Sandberg@ARM.comvoid 4879651SAndreas.Sandberg@ARM.comBaseKvmCPU::tick() 4889651SAndreas.Sandberg@ARM.com{ 4899753Sandreas@sandberg.pp.se Tick delay(0); 4909753Sandreas@sandberg.pp.se assert(_status != Idle); 4919651SAndreas.Sandberg@ARM.com 4929651SAndreas.Sandberg@ARM.com switch (_status) { 4939753Sandreas@sandberg.pp.se case RunningService: 4949753Sandreas@sandberg.pp.se // handleKvmExit() will determine the next state of the CPU 4959753Sandreas@sandberg.pp.se delay = handleKvmExit(); 4969753Sandreas@sandberg.pp.se 4979753Sandreas@sandberg.pp.se if (tryDrain()) 4989753Sandreas@sandberg.pp.se _status = Idle; 4999651SAndreas.Sandberg@ARM.com break; 5009651SAndreas.Sandberg@ARM.com 5019753Sandreas@sandberg.pp.se case RunningServiceCompletion: 5029753Sandreas@sandberg.pp.se case Running: { 5039753Sandreas@sandberg.pp.se Tick ticksToExecute(mainEventQueue.nextTick() - curTick()); 5049753Sandreas@sandberg.pp.se 5059753Sandreas@sandberg.pp.se // We might need to update the KVM state. 5069753Sandreas@sandberg.pp.se syncKvmState(); 5079753Sandreas@sandberg.pp.se 5089753Sandreas@sandberg.pp.se DPRINTF(KvmRun, "Entering KVM...\n"); 5099753Sandreas@sandberg.pp.se if (drainManager) { 5109753Sandreas@sandberg.pp.se // Force an immediate exit from KVM after completing 5119753Sandreas@sandberg.pp.se // pending operations. The architecture-specific code 5129753Sandreas@sandberg.pp.se // takes care to run until it is in a state where it can 5139753Sandreas@sandberg.pp.se // safely be drained. 5149753Sandreas@sandberg.pp.se delay = kvmRunDrain(); 5159753Sandreas@sandberg.pp.se } else { 5169753Sandreas@sandberg.pp.se delay = kvmRun(ticksToExecute); 5179753Sandreas@sandberg.pp.se } 5189753Sandreas@sandberg.pp.se 5199753Sandreas@sandberg.pp.se // Entering into KVM implies that we'll have to reload the thread 5209753Sandreas@sandberg.pp.se // context from KVM if we want to access it. Flag the KVM state as 5219753Sandreas@sandberg.pp.se // dirty with respect to the cached thread context. 5229753Sandreas@sandberg.pp.se kvmStateDirty = true; 5239753Sandreas@sandberg.pp.se 5249753Sandreas@sandberg.pp.se // Enter into the RunningService state unless the 5259753Sandreas@sandberg.pp.se // simulation was stopped by a timer. 5269753Sandreas@sandberg.pp.se if (_kvmRun->exit_reason != KVM_EXIT_INTR) 5279753Sandreas@sandberg.pp.se _status = RunningService; 5289753Sandreas@sandberg.pp.se else 5299753Sandreas@sandberg.pp.se _status = Running; 5309753Sandreas@sandberg.pp.se 5319753Sandreas@sandberg.pp.se if (tryDrain()) 5329753Sandreas@sandberg.pp.se _status = Idle; 5339753Sandreas@sandberg.pp.se } break; 5349753Sandreas@sandberg.pp.se 5359651SAndreas.Sandberg@ARM.com default: 5369753Sandreas@sandberg.pp.se panic("BaseKvmCPU entered tick() in an illegal state (%i)\n", 5379753Sandreas@sandberg.pp.se _status); 5389651SAndreas.Sandberg@ARM.com } 5399753Sandreas@sandberg.pp.se 5409753Sandreas@sandberg.pp.se // Schedule a new tick if we are still running 5419753Sandreas@sandberg.pp.se if (_status != Idle) 5429753Sandreas@sandberg.pp.se schedule(tickEvent, clockEdge(ticksToCycles(delay))); 5439753Sandreas@sandberg.pp.se} 5449753Sandreas@sandberg.pp.se 5459753Sandreas@sandberg.pp.seTick 5469753Sandreas@sandberg.pp.seBaseKvmCPU::kvmRunDrain() 5479753Sandreas@sandberg.pp.se{ 5489753Sandreas@sandberg.pp.se // By default, the only thing we need to drain is a pending IO 5499753Sandreas@sandberg.pp.se // operation which assumes that we are in the 5509753Sandreas@sandberg.pp.se // RunningServiceCompletion state. 5519753Sandreas@sandberg.pp.se assert(_status == RunningServiceCompletion); 5529753Sandreas@sandberg.pp.se 5539753Sandreas@sandberg.pp.se // Deliver the data from the pending IO operation and immediately 5549753Sandreas@sandberg.pp.se // exit. 5559753Sandreas@sandberg.pp.se return kvmRun(0); 5569651SAndreas.Sandberg@ARM.com} 5579651SAndreas.Sandberg@ARM.com 5589735Sandreas@sandberg.pp.seuint64_t 5599735Sandreas@sandberg.pp.seBaseKvmCPU::getHostCycles() const 5609735Sandreas@sandberg.pp.se{ 5619735Sandreas@sandberg.pp.se return hwCycles.read(); 5629735Sandreas@sandberg.pp.se} 5639735Sandreas@sandberg.pp.se 5649651SAndreas.Sandberg@ARM.comTick 5659651SAndreas.Sandberg@ARM.comBaseKvmCPU::kvmRun(Tick ticks) 5669651SAndreas.Sandberg@ARM.com{ 5679753Sandreas@sandberg.pp.se Tick ticksExecuted; 5689651SAndreas.Sandberg@ARM.com DPRINTF(KvmRun, "KVM: Executing for %i ticks\n", ticks); 5699651SAndreas.Sandberg@ARM.com timerOverflowed = false; 5709655SAndreas.Sandberg@ARM.com 5719753Sandreas@sandberg.pp.se if (ticks == 0) { 5729753Sandreas@sandberg.pp.se // Settings ticks == 0 is a special case which causes an entry 5739753Sandreas@sandberg.pp.se // into KVM that finishes pending operations (e.g., IO) and 5749753Sandreas@sandberg.pp.se // then immediately exits. 5759753Sandreas@sandberg.pp.se DPRINTF(KvmRun, "KVM: Delivering IO without full guest entry\n"); 5769735Sandreas@sandberg.pp.se 5779753Sandreas@sandberg.pp.se // This signal is always masked while we are executing in gem5 5789753Sandreas@sandberg.pp.se // and gets unmasked temporarily as soon as we enter into 5799753Sandreas@sandberg.pp.se // KVM. See setSignalMask() and setupSignalHandler(). 5809753Sandreas@sandberg.pp.se raise(KVM_TIMER_SIGNAL); 5819655SAndreas.Sandberg@ARM.com 5829753Sandreas@sandberg.pp.se // Enter into KVM. KVM will check for signals after completing 5839753Sandreas@sandberg.pp.se // pending operations (IO). Since the KVM_TIMER_SIGNAL is 5849753Sandreas@sandberg.pp.se // pending, this forces an immediate exit into gem5 again. We 5859753Sandreas@sandberg.pp.se // don't bother to setup timers since this shouldn't actually 5869753Sandreas@sandberg.pp.se // execute any code in the guest. 5879753Sandreas@sandberg.pp.se ioctlRun(); 5889753Sandreas@sandberg.pp.se 5899753Sandreas@sandberg.pp.se // We always execute at least one cycle to prevent the 5909753Sandreas@sandberg.pp.se // BaseKvmCPU::tick() to be rescheduled on the same tick 5919753Sandreas@sandberg.pp.se // twice. 5929753Sandreas@sandberg.pp.se ticksExecuted = clockPeriod(); 5939753Sandreas@sandberg.pp.se } else { 5949753Sandreas@sandberg.pp.se if (ticks < runTimer->resolution()) { 5959753Sandreas@sandberg.pp.se DPRINTF(KvmRun, "KVM: Adjusting tick count (%i -> %i)\n", 5969753Sandreas@sandberg.pp.se ticks, runTimer->resolution()); 5979753Sandreas@sandberg.pp.se ticks = runTimer->resolution(); 5989753Sandreas@sandberg.pp.se } 5999753Sandreas@sandberg.pp.se 6009753Sandreas@sandberg.pp.se // Get hardware statistics after synchronizing contexts. The KVM 6019753Sandreas@sandberg.pp.se // state update might affect guest cycle counters. 6029753Sandreas@sandberg.pp.se uint64_t baseCycles(getHostCycles()); 6039753Sandreas@sandberg.pp.se uint64_t baseInstrs(hwInstructions.read()); 6049753Sandreas@sandberg.pp.se 6059753Sandreas@sandberg.pp.se // Arm the run timer and start the cycle timer if it isn't 6069753Sandreas@sandberg.pp.se // controlled by the overflow timer. Starting/stopping the cycle 6079753Sandreas@sandberg.pp.se // timer automatically starts the other perf timers as they are in 6089753Sandreas@sandberg.pp.se // the same counter group. 6099753Sandreas@sandberg.pp.se runTimer->arm(ticks); 6109753Sandreas@sandberg.pp.se if (!perfControlledByTimer) 6119753Sandreas@sandberg.pp.se hwCycles.start(); 6129753Sandreas@sandberg.pp.se 6139753Sandreas@sandberg.pp.se ioctlRun(); 6149753Sandreas@sandberg.pp.se 6159753Sandreas@sandberg.pp.se runTimer->disarm(); 6169753Sandreas@sandberg.pp.se if (!perfControlledByTimer) 6179753Sandreas@sandberg.pp.se hwCycles.stop(); 6189753Sandreas@sandberg.pp.se 6199753Sandreas@sandberg.pp.se // The timer signal may have been delivered after we exited 6209753Sandreas@sandberg.pp.se // from KVM. It will be pending in that case since it is 6219753Sandreas@sandberg.pp.se // masked when we aren't executing in KVM. Discard it to make 6229753Sandreas@sandberg.pp.se // sure we don't deliver it immediately next time we try to 6239753Sandreas@sandberg.pp.se // enter into KVM. 6249753Sandreas@sandberg.pp.se discardPendingSignal(KVM_TIMER_SIGNAL); 6259753Sandreas@sandberg.pp.se 6269753Sandreas@sandberg.pp.se const uint64_t hostCyclesExecuted(getHostCycles() - baseCycles); 6279753Sandreas@sandberg.pp.se const uint64_t simCyclesExecuted(hostCyclesExecuted * hostFactor); 6289753Sandreas@sandberg.pp.se const uint64_t instsExecuted(hwInstructions.read() - baseInstrs); 6299753Sandreas@sandberg.pp.se ticksExecuted = runTimer->ticksFromHostCycles(hostCyclesExecuted); 6309753Sandreas@sandberg.pp.se 6319753Sandreas@sandberg.pp.se if (ticksExecuted < ticks && 6329753Sandreas@sandberg.pp.se timerOverflowed && 6339753Sandreas@sandberg.pp.se _kvmRun->exit_reason == KVM_EXIT_INTR) { 6349753Sandreas@sandberg.pp.se // TODO: We should probably do something clever here... 6359753Sandreas@sandberg.pp.se warn("KVM: Early timer event, requested %i ticks but got %i ticks.\n", 6369753Sandreas@sandberg.pp.se ticks, ticksExecuted); 6379753Sandreas@sandberg.pp.se } 6389753Sandreas@sandberg.pp.se 6399753Sandreas@sandberg.pp.se /* Update statistics */ 6409753Sandreas@sandberg.pp.se numCycles += simCyclesExecuted;; 6419753Sandreas@sandberg.pp.se numInsts += instsExecuted; 6429753Sandreas@sandberg.pp.se ctrInsts += instsExecuted; 6439753Sandreas@sandberg.pp.se system->totalNumInsts += instsExecuted; 6449753Sandreas@sandberg.pp.se 6459753Sandreas@sandberg.pp.se DPRINTF(KvmRun, 6469753Sandreas@sandberg.pp.se "KVM: Executed %i instructions in %i cycles " 6479753Sandreas@sandberg.pp.se "(%i ticks, sim cycles: %i).\n", 6489753Sandreas@sandberg.pp.se instsExecuted, hostCyclesExecuted, ticksExecuted, simCyclesExecuted); 6499651SAndreas.Sandberg@ARM.com } 6509655SAndreas.Sandberg@ARM.com 6519651SAndreas.Sandberg@ARM.com ++numVMExits; 6529651SAndreas.Sandberg@ARM.com 6539651SAndreas.Sandberg@ARM.com return ticksExecuted + flushCoalescedMMIO(); 6549651SAndreas.Sandberg@ARM.com} 6559651SAndreas.Sandberg@ARM.com 6569651SAndreas.Sandberg@ARM.comvoid 6579651SAndreas.Sandberg@ARM.comBaseKvmCPU::kvmNonMaskableInterrupt() 6589651SAndreas.Sandberg@ARM.com{ 6599651SAndreas.Sandberg@ARM.com ++numInterrupts; 6609651SAndreas.Sandberg@ARM.com if (ioctl(KVM_NMI) == -1) 6619651SAndreas.Sandberg@ARM.com panic("KVM: Failed to deliver NMI to virtual CPU\n"); 6629651SAndreas.Sandberg@ARM.com} 6639651SAndreas.Sandberg@ARM.com 6649651SAndreas.Sandberg@ARM.comvoid 6659651SAndreas.Sandberg@ARM.comBaseKvmCPU::kvmInterrupt(const struct kvm_interrupt &interrupt) 6669651SAndreas.Sandberg@ARM.com{ 6679651SAndreas.Sandberg@ARM.com ++numInterrupts; 6689651SAndreas.Sandberg@ARM.com if (ioctl(KVM_INTERRUPT, (void *)&interrupt) == -1) 6699651SAndreas.Sandberg@ARM.com panic("KVM: Failed to deliver interrupt to virtual CPU\n"); 6709651SAndreas.Sandberg@ARM.com} 6719651SAndreas.Sandberg@ARM.com 6729651SAndreas.Sandberg@ARM.comvoid 6739651SAndreas.Sandberg@ARM.comBaseKvmCPU::getRegisters(struct kvm_regs ®s) const 6749651SAndreas.Sandberg@ARM.com{ 6759651SAndreas.Sandberg@ARM.com if (ioctl(KVM_GET_REGS, ®s) == -1) 6769651SAndreas.Sandberg@ARM.com panic("KVM: Failed to get guest registers\n"); 6779651SAndreas.Sandberg@ARM.com} 6789651SAndreas.Sandberg@ARM.com 6799651SAndreas.Sandberg@ARM.comvoid 6809651SAndreas.Sandberg@ARM.comBaseKvmCPU::setRegisters(const struct kvm_regs ®s) 6819651SAndreas.Sandberg@ARM.com{ 6829651SAndreas.Sandberg@ARM.com if (ioctl(KVM_SET_REGS, (void *)®s) == -1) 6839651SAndreas.Sandberg@ARM.com panic("KVM: Failed to set guest registers\n"); 6849651SAndreas.Sandberg@ARM.com} 6859651SAndreas.Sandberg@ARM.com 6869651SAndreas.Sandberg@ARM.comvoid 6879651SAndreas.Sandberg@ARM.comBaseKvmCPU::getSpecialRegisters(struct kvm_sregs ®s) const 6889651SAndreas.Sandberg@ARM.com{ 6899651SAndreas.Sandberg@ARM.com if (ioctl(KVM_GET_SREGS, ®s) == -1) 6909651SAndreas.Sandberg@ARM.com panic("KVM: Failed to get guest special registers\n"); 6919651SAndreas.Sandberg@ARM.com} 6929651SAndreas.Sandberg@ARM.com 6939651SAndreas.Sandberg@ARM.comvoid 6949651SAndreas.Sandberg@ARM.comBaseKvmCPU::setSpecialRegisters(const struct kvm_sregs ®s) 6959651SAndreas.Sandberg@ARM.com{ 6969651SAndreas.Sandberg@ARM.com if (ioctl(KVM_SET_SREGS, (void *)®s) == -1) 6979651SAndreas.Sandberg@ARM.com panic("KVM: Failed to set guest special registers\n"); 6989651SAndreas.Sandberg@ARM.com} 6999651SAndreas.Sandberg@ARM.com 7009651SAndreas.Sandberg@ARM.comvoid 7019651SAndreas.Sandberg@ARM.comBaseKvmCPU::getFPUState(struct kvm_fpu &state) const 7029651SAndreas.Sandberg@ARM.com{ 7039651SAndreas.Sandberg@ARM.com if (ioctl(KVM_GET_FPU, &state) == -1) 7049651SAndreas.Sandberg@ARM.com panic("KVM: Failed to get guest FPU state\n"); 7059651SAndreas.Sandberg@ARM.com} 7069651SAndreas.Sandberg@ARM.com 7079651SAndreas.Sandberg@ARM.comvoid 7089651SAndreas.Sandberg@ARM.comBaseKvmCPU::setFPUState(const struct kvm_fpu &state) 7099651SAndreas.Sandberg@ARM.com{ 7109651SAndreas.Sandberg@ARM.com if (ioctl(KVM_SET_FPU, (void *)&state) == -1) 7119651SAndreas.Sandberg@ARM.com panic("KVM: Failed to set guest FPU state\n"); 7129651SAndreas.Sandberg@ARM.com} 7139651SAndreas.Sandberg@ARM.com 7149651SAndreas.Sandberg@ARM.com 7159651SAndreas.Sandberg@ARM.comvoid 7169651SAndreas.Sandberg@ARM.comBaseKvmCPU::setOneReg(uint64_t id, const void *addr) 7179651SAndreas.Sandberg@ARM.com{ 7189651SAndreas.Sandberg@ARM.com#ifdef KVM_SET_ONE_REG 7199651SAndreas.Sandberg@ARM.com struct kvm_one_reg reg; 7209651SAndreas.Sandberg@ARM.com reg.id = id; 7219651SAndreas.Sandberg@ARM.com reg.addr = (uint64_t)addr; 7229651SAndreas.Sandberg@ARM.com 7239651SAndreas.Sandberg@ARM.com if (ioctl(KVM_SET_ONE_REG, ®) == -1) { 7249651SAndreas.Sandberg@ARM.com panic("KVM: Failed to set register (0x%x) value (errno: %i)\n", 7259651SAndreas.Sandberg@ARM.com id, errno); 7269651SAndreas.Sandberg@ARM.com } 7279651SAndreas.Sandberg@ARM.com#else 7289651SAndreas.Sandberg@ARM.com panic("KVM_SET_ONE_REG is unsupported on this platform.\n"); 7299651SAndreas.Sandberg@ARM.com#endif 7309651SAndreas.Sandberg@ARM.com} 7319651SAndreas.Sandberg@ARM.com 7329651SAndreas.Sandberg@ARM.comvoid 7339651SAndreas.Sandberg@ARM.comBaseKvmCPU::getOneReg(uint64_t id, void *addr) const 7349651SAndreas.Sandberg@ARM.com{ 7359651SAndreas.Sandberg@ARM.com#ifdef KVM_GET_ONE_REG 7369651SAndreas.Sandberg@ARM.com struct kvm_one_reg reg; 7379651SAndreas.Sandberg@ARM.com reg.id = id; 7389651SAndreas.Sandberg@ARM.com reg.addr = (uint64_t)addr; 7399651SAndreas.Sandberg@ARM.com 7409651SAndreas.Sandberg@ARM.com if (ioctl(KVM_GET_ONE_REG, ®) == -1) { 7419651SAndreas.Sandberg@ARM.com panic("KVM: Failed to get register (0x%x) value (errno: %i)\n", 7429651SAndreas.Sandberg@ARM.com id, errno); 7439651SAndreas.Sandberg@ARM.com } 7449651SAndreas.Sandberg@ARM.com#else 7459651SAndreas.Sandberg@ARM.com panic("KVM_GET_ONE_REG is unsupported on this platform.\n"); 7469651SAndreas.Sandberg@ARM.com#endif 7479651SAndreas.Sandberg@ARM.com} 7489651SAndreas.Sandberg@ARM.com 7499651SAndreas.Sandberg@ARM.comstd::string 7509651SAndreas.Sandberg@ARM.comBaseKvmCPU::getAndFormatOneReg(uint64_t id) const 7519651SAndreas.Sandberg@ARM.com{ 7529651SAndreas.Sandberg@ARM.com#ifdef KVM_GET_ONE_REG 7539651SAndreas.Sandberg@ARM.com std::ostringstream ss; 7549651SAndreas.Sandberg@ARM.com 7559651SAndreas.Sandberg@ARM.com ss.setf(std::ios::hex, std::ios::basefield); 7569651SAndreas.Sandberg@ARM.com ss.setf(std::ios::showbase); 7579651SAndreas.Sandberg@ARM.com#define HANDLE_INTTYPE(len) \ 7589651SAndreas.Sandberg@ARM.com case KVM_REG_SIZE_U ## len: { \ 7599651SAndreas.Sandberg@ARM.com uint ## len ## _t value; \ 7609651SAndreas.Sandberg@ARM.com getOneReg(id, &value); \ 7619651SAndreas.Sandberg@ARM.com ss << value; \ 7629651SAndreas.Sandberg@ARM.com } break 7639651SAndreas.Sandberg@ARM.com 7649651SAndreas.Sandberg@ARM.com#define HANDLE_ARRAY(len) \ 7659651SAndreas.Sandberg@ARM.com case KVM_REG_SIZE_U ## len: { \ 7669651SAndreas.Sandberg@ARM.com uint8_t value[len / 8]; \ 7679651SAndreas.Sandberg@ARM.com getOneReg(id, value); \ 7689651SAndreas.Sandberg@ARM.com ss << "[" << value[0]; \ 7699651SAndreas.Sandberg@ARM.com for (int i = 1; i < len / 8; ++i) \ 7709651SAndreas.Sandberg@ARM.com ss << ", " << value[i]; \ 7719651SAndreas.Sandberg@ARM.com ss << "]"; \ 7729651SAndreas.Sandberg@ARM.com } break 7739651SAndreas.Sandberg@ARM.com 7749651SAndreas.Sandberg@ARM.com switch (id & KVM_REG_SIZE_MASK) { 7759651SAndreas.Sandberg@ARM.com HANDLE_INTTYPE(8); 7769651SAndreas.Sandberg@ARM.com HANDLE_INTTYPE(16); 7779651SAndreas.Sandberg@ARM.com HANDLE_INTTYPE(32); 7789651SAndreas.Sandberg@ARM.com HANDLE_INTTYPE(64); 7799651SAndreas.Sandberg@ARM.com HANDLE_ARRAY(128); 7809651SAndreas.Sandberg@ARM.com HANDLE_ARRAY(256); 7819651SAndreas.Sandberg@ARM.com HANDLE_ARRAY(512); 7829651SAndreas.Sandberg@ARM.com HANDLE_ARRAY(1024); 7839651SAndreas.Sandberg@ARM.com default: 7849651SAndreas.Sandberg@ARM.com ss << "??"; 7859651SAndreas.Sandberg@ARM.com } 7869651SAndreas.Sandberg@ARM.com 7879651SAndreas.Sandberg@ARM.com#undef HANDLE_INTTYPE 7889651SAndreas.Sandberg@ARM.com#undef HANDLE_ARRAY 7899651SAndreas.Sandberg@ARM.com 7909651SAndreas.Sandberg@ARM.com return ss.str(); 7919651SAndreas.Sandberg@ARM.com#else 7929651SAndreas.Sandberg@ARM.com panic("KVM_GET_ONE_REG is unsupported on this platform.\n"); 7939651SAndreas.Sandberg@ARM.com#endif 7949651SAndreas.Sandberg@ARM.com} 7959651SAndreas.Sandberg@ARM.com 7969652SAndreas.Sandberg@ARM.comvoid 7979652SAndreas.Sandberg@ARM.comBaseKvmCPU::syncThreadContext() 7989652SAndreas.Sandberg@ARM.com{ 7999652SAndreas.Sandberg@ARM.com if (!kvmStateDirty) 8009652SAndreas.Sandberg@ARM.com return; 8019652SAndreas.Sandberg@ARM.com 8029652SAndreas.Sandberg@ARM.com assert(!threadContextDirty); 8039652SAndreas.Sandberg@ARM.com 8049652SAndreas.Sandberg@ARM.com updateThreadContext(); 8059652SAndreas.Sandberg@ARM.com kvmStateDirty = false; 8069652SAndreas.Sandberg@ARM.com} 8079652SAndreas.Sandberg@ARM.com 8089652SAndreas.Sandberg@ARM.comvoid 8099652SAndreas.Sandberg@ARM.comBaseKvmCPU::syncKvmState() 8109652SAndreas.Sandberg@ARM.com{ 8119652SAndreas.Sandberg@ARM.com if (!threadContextDirty) 8129652SAndreas.Sandberg@ARM.com return; 8139652SAndreas.Sandberg@ARM.com 8149652SAndreas.Sandberg@ARM.com assert(!kvmStateDirty); 8159652SAndreas.Sandberg@ARM.com 8169652SAndreas.Sandberg@ARM.com updateKvmState(); 8179652SAndreas.Sandberg@ARM.com threadContextDirty = false; 8189652SAndreas.Sandberg@ARM.com} 8199652SAndreas.Sandberg@ARM.com 8209651SAndreas.Sandberg@ARM.comTick 8219651SAndreas.Sandberg@ARM.comBaseKvmCPU::handleKvmExit() 8229651SAndreas.Sandberg@ARM.com{ 8239651SAndreas.Sandberg@ARM.com DPRINTF(KvmRun, "handleKvmExit (exit_reason: %i)\n", _kvmRun->exit_reason); 8249753Sandreas@sandberg.pp.se assert(_status == RunningService); 8259651SAndreas.Sandberg@ARM.com 8269753Sandreas@sandberg.pp.se // Switch into the running state by default. Individual handlers 8279753Sandreas@sandberg.pp.se // can override this. 8289753Sandreas@sandberg.pp.se _status = Running; 8299651SAndreas.Sandberg@ARM.com switch (_kvmRun->exit_reason) { 8309651SAndreas.Sandberg@ARM.com case KVM_EXIT_UNKNOWN: 8319651SAndreas.Sandberg@ARM.com return handleKvmExitUnknown(); 8329651SAndreas.Sandberg@ARM.com 8339651SAndreas.Sandberg@ARM.com case KVM_EXIT_EXCEPTION: 8349651SAndreas.Sandberg@ARM.com return handleKvmExitException(); 8359651SAndreas.Sandberg@ARM.com 8369651SAndreas.Sandberg@ARM.com case KVM_EXIT_IO: 8379753Sandreas@sandberg.pp.se _status = RunningServiceCompletion; 8389651SAndreas.Sandberg@ARM.com ++numIO; 8399651SAndreas.Sandberg@ARM.com return handleKvmExitIO(); 8409651SAndreas.Sandberg@ARM.com 8419651SAndreas.Sandberg@ARM.com case KVM_EXIT_HYPERCALL: 8429651SAndreas.Sandberg@ARM.com ++numHypercalls; 8439651SAndreas.Sandberg@ARM.com return handleKvmExitHypercall(); 8449651SAndreas.Sandberg@ARM.com 8459651SAndreas.Sandberg@ARM.com case KVM_EXIT_HLT: 8469651SAndreas.Sandberg@ARM.com /* The guest has halted and is waiting for interrupts */ 8479651SAndreas.Sandberg@ARM.com DPRINTF(Kvm, "handleKvmExitHalt\n"); 8489651SAndreas.Sandberg@ARM.com ++numHalt; 8499651SAndreas.Sandberg@ARM.com 8509651SAndreas.Sandberg@ARM.com // Suspend the thread until the next interrupt arrives 8519651SAndreas.Sandberg@ARM.com thread->suspend(); 8529651SAndreas.Sandberg@ARM.com 8539651SAndreas.Sandberg@ARM.com // This is actually ignored since the thread is suspended. 8549651SAndreas.Sandberg@ARM.com return 0; 8559651SAndreas.Sandberg@ARM.com 8569651SAndreas.Sandberg@ARM.com case KVM_EXIT_MMIO: 8579753Sandreas@sandberg.pp.se _status = RunningServiceCompletion; 8589651SAndreas.Sandberg@ARM.com /* Service memory mapped IO requests */ 8599651SAndreas.Sandberg@ARM.com DPRINTF(KvmIO, "KVM: Handling MMIO (w: %u, addr: 0x%x, len: %u)\n", 8609651SAndreas.Sandberg@ARM.com _kvmRun->mmio.is_write, 8619651SAndreas.Sandberg@ARM.com _kvmRun->mmio.phys_addr, _kvmRun->mmio.len); 8629651SAndreas.Sandberg@ARM.com 8639651SAndreas.Sandberg@ARM.com ++numMMIO; 8649651SAndreas.Sandberg@ARM.com return doMMIOAccess(_kvmRun->mmio.phys_addr, _kvmRun->mmio.data, 8659651SAndreas.Sandberg@ARM.com _kvmRun->mmio.len, _kvmRun->mmio.is_write); 8669651SAndreas.Sandberg@ARM.com 8679651SAndreas.Sandberg@ARM.com case KVM_EXIT_IRQ_WINDOW_OPEN: 8689651SAndreas.Sandberg@ARM.com return handleKvmExitIRQWindowOpen(); 8699651SAndreas.Sandberg@ARM.com 8709651SAndreas.Sandberg@ARM.com case KVM_EXIT_FAIL_ENTRY: 8719651SAndreas.Sandberg@ARM.com return handleKvmExitFailEntry(); 8729651SAndreas.Sandberg@ARM.com 8739651SAndreas.Sandberg@ARM.com case KVM_EXIT_INTR: 8749651SAndreas.Sandberg@ARM.com /* KVM was interrupted by a signal, restart it in the next 8759651SAndreas.Sandberg@ARM.com * tick. */ 8769651SAndreas.Sandberg@ARM.com return 0; 8779651SAndreas.Sandberg@ARM.com 8789651SAndreas.Sandberg@ARM.com case KVM_EXIT_INTERNAL_ERROR: 8799651SAndreas.Sandberg@ARM.com panic("KVM: Internal error (suberror: %u)\n", 8809651SAndreas.Sandberg@ARM.com _kvmRun->internal.suberror); 8819651SAndreas.Sandberg@ARM.com 8829651SAndreas.Sandberg@ARM.com default: 8839689Sandreas@sandberg.pp.se dump(); 8849651SAndreas.Sandberg@ARM.com panic("KVM: Unexpected exit (exit_reason: %u)\n", _kvmRun->exit_reason); 8859651SAndreas.Sandberg@ARM.com } 8869651SAndreas.Sandberg@ARM.com} 8879651SAndreas.Sandberg@ARM.com 8889651SAndreas.Sandberg@ARM.comTick 8899651SAndreas.Sandberg@ARM.comBaseKvmCPU::handleKvmExitIO() 8909651SAndreas.Sandberg@ARM.com{ 8919651SAndreas.Sandberg@ARM.com panic("KVM: Unhandled guest IO (dir: %i, size: %i, port: 0x%x, count: %i)\n", 8929651SAndreas.Sandberg@ARM.com _kvmRun->io.direction, _kvmRun->io.size, 8939651SAndreas.Sandberg@ARM.com _kvmRun->io.port, _kvmRun->io.count); 8949651SAndreas.Sandberg@ARM.com} 8959651SAndreas.Sandberg@ARM.com 8969651SAndreas.Sandberg@ARM.comTick 8979651SAndreas.Sandberg@ARM.comBaseKvmCPU::handleKvmExitHypercall() 8989651SAndreas.Sandberg@ARM.com{ 8999651SAndreas.Sandberg@ARM.com panic("KVM: Unhandled hypercall\n"); 9009651SAndreas.Sandberg@ARM.com} 9019651SAndreas.Sandberg@ARM.com 9029651SAndreas.Sandberg@ARM.comTick 9039651SAndreas.Sandberg@ARM.comBaseKvmCPU::handleKvmExitIRQWindowOpen() 9049651SAndreas.Sandberg@ARM.com{ 9059651SAndreas.Sandberg@ARM.com warn("KVM: Unhandled IRQ window.\n"); 9069651SAndreas.Sandberg@ARM.com return 0; 9079651SAndreas.Sandberg@ARM.com} 9089651SAndreas.Sandberg@ARM.com 9099651SAndreas.Sandberg@ARM.com 9109651SAndreas.Sandberg@ARM.comTick 9119651SAndreas.Sandberg@ARM.comBaseKvmCPU::handleKvmExitUnknown() 9129651SAndreas.Sandberg@ARM.com{ 9139689Sandreas@sandberg.pp.se dump(); 9149651SAndreas.Sandberg@ARM.com panic("KVM: Unknown error when starting vCPU (hw reason: 0x%llx)\n", 9159651SAndreas.Sandberg@ARM.com _kvmRun->hw.hardware_exit_reason); 9169651SAndreas.Sandberg@ARM.com} 9179651SAndreas.Sandberg@ARM.com 9189651SAndreas.Sandberg@ARM.comTick 9199651SAndreas.Sandberg@ARM.comBaseKvmCPU::handleKvmExitException() 9209651SAndreas.Sandberg@ARM.com{ 9219689Sandreas@sandberg.pp.se dump(); 9229651SAndreas.Sandberg@ARM.com panic("KVM: Got exception when starting vCPU " 9239651SAndreas.Sandberg@ARM.com "(exception: %u, error_code: %u)\n", 9249651SAndreas.Sandberg@ARM.com _kvmRun->ex.exception, _kvmRun->ex.error_code); 9259651SAndreas.Sandberg@ARM.com} 9269651SAndreas.Sandberg@ARM.com 9279651SAndreas.Sandberg@ARM.comTick 9289651SAndreas.Sandberg@ARM.comBaseKvmCPU::handleKvmExitFailEntry() 9299651SAndreas.Sandberg@ARM.com{ 9309689Sandreas@sandberg.pp.se dump(); 9319651SAndreas.Sandberg@ARM.com panic("KVM: Failed to enter virtualized mode (hw reason: 0x%llx)\n", 9329651SAndreas.Sandberg@ARM.com _kvmRun->fail_entry.hardware_entry_failure_reason); 9339651SAndreas.Sandberg@ARM.com} 9349651SAndreas.Sandberg@ARM.com 9359651SAndreas.Sandberg@ARM.comTick 9369651SAndreas.Sandberg@ARM.comBaseKvmCPU::doMMIOAccess(Addr paddr, void *data, int size, bool write) 9379651SAndreas.Sandberg@ARM.com{ 9389682Sandreas@sandberg.pp.se mmio_req.setPhys(paddr, size, Request::UNCACHEABLE, dataMasterId()); 9399651SAndreas.Sandberg@ARM.com 9409651SAndreas.Sandberg@ARM.com const MemCmd cmd(write ? MemCmd::WriteReq : MemCmd::ReadReq); 9419651SAndreas.Sandberg@ARM.com Packet pkt(&mmio_req, cmd); 9429651SAndreas.Sandberg@ARM.com pkt.dataStatic(data); 9439651SAndreas.Sandberg@ARM.com return dataPort.sendAtomic(&pkt); 9449651SAndreas.Sandberg@ARM.com} 9459651SAndreas.Sandberg@ARM.com 9469753Sandreas@sandberg.pp.sevoid 9479753Sandreas@sandberg.pp.seBaseKvmCPU::setSignalMask(const sigset_t *mask) 9489753Sandreas@sandberg.pp.se{ 9499753Sandreas@sandberg.pp.se std::unique_ptr<struct kvm_signal_mask> kvm_mask; 9509753Sandreas@sandberg.pp.se 9519753Sandreas@sandberg.pp.se if (mask) { 9529753Sandreas@sandberg.pp.se kvm_mask.reset((struct kvm_signal_mask *)operator new( 9539753Sandreas@sandberg.pp.se sizeof(struct kvm_signal_mask) + sizeof(*mask))); 9549753Sandreas@sandberg.pp.se // The kernel and the user-space headers have different ideas 9559753Sandreas@sandberg.pp.se // about the size of sigset_t. This seems like a massive hack, 9569753Sandreas@sandberg.pp.se // but is actually what qemu does. 9579753Sandreas@sandberg.pp.se assert(sizeof(*mask) >= 8); 9589753Sandreas@sandberg.pp.se kvm_mask->len = 8; 9599753Sandreas@sandberg.pp.se memcpy(kvm_mask->sigset, mask, kvm_mask->len); 9609753Sandreas@sandberg.pp.se } 9619753Sandreas@sandberg.pp.se 9629753Sandreas@sandberg.pp.se if (ioctl(KVM_SET_SIGNAL_MASK, (void *)kvm_mask.get()) == -1) 9639753Sandreas@sandberg.pp.se panic("KVM: Failed to set vCPU signal mask (errno: %i)\n", 9649753Sandreas@sandberg.pp.se errno); 9659753Sandreas@sandberg.pp.se} 9669753Sandreas@sandberg.pp.se 9679651SAndreas.Sandberg@ARM.comint 9689651SAndreas.Sandberg@ARM.comBaseKvmCPU::ioctl(int request, long p1) const 9699651SAndreas.Sandberg@ARM.com{ 9709651SAndreas.Sandberg@ARM.com if (vcpuFD == -1) 9719651SAndreas.Sandberg@ARM.com panic("KVM: CPU ioctl called before initialization\n"); 9729651SAndreas.Sandberg@ARM.com 9739651SAndreas.Sandberg@ARM.com return ::ioctl(vcpuFD, request, p1); 9749651SAndreas.Sandberg@ARM.com} 9759651SAndreas.Sandberg@ARM.com 9769651SAndreas.Sandberg@ARM.comTick 9779651SAndreas.Sandberg@ARM.comBaseKvmCPU::flushCoalescedMMIO() 9789651SAndreas.Sandberg@ARM.com{ 9799651SAndreas.Sandberg@ARM.com if (!mmioRing) 9809651SAndreas.Sandberg@ARM.com return 0; 9819651SAndreas.Sandberg@ARM.com 9829651SAndreas.Sandberg@ARM.com DPRINTF(KvmIO, "KVM: Flushing the coalesced MMIO ring buffer\n"); 9839651SAndreas.Sandberg@ARM.com 9849651SAndreas.Sandberg@ARM.com // TODO: We might need to do synchronization when we start to 9859651SAndreas.Sandberg@ARM.com // support multiple CPUs 9869651SAndreas.Sandberg@ARM.com Tick ticks(0); 9879651SAndreas.Sandberg@ARM.com while (mmioRing->first != mmioRing->last) { 9889651SAndreas.Sandberg@ARM.com struct kvm_coalesced_mmio &ent( 9899651SAndreas.Sandberg@ARM.com mmioRing->coalesced_mmio[mmioRing->first]); 9909651SAndreas.Sandberg@ARM.com 9919651SAndreas.Sandberg@ARM.com DPRINTF(KvmIO, "KVM: Handling coalesced MMIO (addr: 0x%x, len: %u)\n", 9929651SAndreas.Sandberg@ARM.com ent.phys_addr, ent.len); 9939651SAndreas.Sandberg@ARM.com 9949651SAndreas.Sandberg@ARM.com ++numCoalescedMMIO; 9959651SAndreas.Sandberg@ARM.com ticks += doMMIOAccess(ent.phys_addr, ent.data, ent.len, true); 9969651SAndreas.Sandberg@ARM.com 9979651SAndreas.Sandberg@ARM.com mmioRing->first = (mmioRing->first + 1) % KVM_COALESCED_MMIO_MAX; 9989651SAndreas.Sandberg@ARM.com } 9999651SAndreas.Sandberg@ARM.com 10009651SAndreas.Sandberg@ARM.com return ticks; 10019651SAndreas.Sandberg@ARM.com} 10029651SAndreas.Sandberg@ARM.com 10039651SAndreas.Sandberg@ARM.comvoid 10049651SAndreas.Sandberg@ARM.comBaseKvmCPU::setupSignalHandler() 10059651SAndreas.Sandberg@ARM.com{ 10069651SAndreas.Sandberg@ARM.com struct sigaction sa; 10079651SAndreas.Sandberg@ARM.com 10089651SAndreas.Sandberg@ARM.com memset(&sa, 0, sizeof(sa)); 10099651SAndreas.Sandberg@ARM.com sa.sa_sigaction = onTimerOverflow; 10109651SAndreas.Sandberg@ARM.com sa.sa_flags = SA_SIGINFO | SA_RESTART; 10119651SAndreas.Sandberg@ARM.com if (sigaction(KVM_TIMER_SIGNAL, &sa, NULL) == -1) 10129651SAndreas.Sandberg@ARM.com panic("KVM: Failed to setup vCPU signal handler\n"); 10139753Sandreas@sandberg.pp.se 10149753Sandreas@sandberg.pp.se sigset_t sigset; 10159753Sandreas@sandberg.pp.se if (sigprocmask(SIG_BLOCK, NULL, &sigset) == -1) 10169753Sandreas@sandberg.pp.se panic("KVM: Failed get signal mask\n"); 10179753Sandreas@sandberg.pp.se 10189753Sandreas@sandberg.pp.se // Request KVM to setup the same signal mask as we're currently 10199753Sandreas@sandberg.pp.se // running with. We'll sometimes need to mask the KVM_TIMER_SIGNAL 10209753Sandreas@sandberg.pp.se // to cause immediate exits from KVM after servicing IO 10219753Sandreas@sandberg.pp.se // requests. See kvmRun(). 10229753Sandreas@sandberg.pp.se setSignalMask(&sigset); 10239753Sandreas@sandberg.pp.se 10249753Sandreas@sandberg.pp.se // Mask the KVM_TIMER_SIGNAL so it isn't delivered unless we're 10259753Sandreas@sandberg.pp.se // actually executing inside KVM. 10269753Sandreas@sandberg.pp.se sigaddset(&sigset, KVM_TIMER_SIGNAL); 10279753Sandreas@sandberg.pp.se if (sigprocmask(SIG_SETMASK, &sigset, NULL) == -1) 10289753Sandreas@sandberg.pp.se panic("KVM: Failed mask the KVM timer signal\n"); 10299753Sandreas@sandberg.pp.se} 10309753Sandreas@sandberg.pp.se 10319753Sandreas@sandberg.pp.sebool 10329753Sandreas@sandberg.pp.seBaseKvmCPU::discardPendingSignal(int signum) const 10339753Sandreas@sandberg.pp.se{ 10349753Sandreas@sandberg.pp.se int discardedSignal; 10359753Sandreas@sandberg.pp.se 10369753Sandreas@sandberg.pp.se // Setting the timeout to zero causes sigtimedwait to return 10379753Sandreas@sandberg.pp.se // immediately. 10389753Sandreas@sandberg.pp.se struct timespec timeout; 10399753Sandreas@sandberg.pp.se timeout.tv_sec = 0; 10409753Sandreas@sandberg.pp.se timeout.tv_nsec = 0; 10419753Sandreas@sandberg.pp.se 10429753Sandreas@sandberg.pp.se sigset_t sigset; 10439753Sandreas@sandberg.pp.se sigemptyset(&sigset); 10449753Sandreas@sandberg.pp.se sigaddset(&sigset, signum); 10459753Sandreas@sandberg.pp.se 10469753Sandreas@sandberg.pp.se do { 10479753Sandreas@sandberg.pp.se discardedSignal = sigtimedwait(&sigset, NULL, &timeout); 10489753Sandreas@sandberg.pp.se } while (discardedSignal == -1 && errno == EINTR); 10499753Sandreas@sandberg.pp.se 10509753Sandreas@sandberg.pp.se if (discardedSignal == signum) 10519753Sandreas@sandberg.pp.se return true; 10529753Sandreas@sandberg.pp.se else if (discardedSignal == -1 && errno == EAGAIN) 10539753Sandreas@sandberg.pp.se return false; 10549753Sandreas@sandberg.pp.se else 10559753Sandreas@sandberg.pp.se panic("Unexpected return value from sigtimedwait: %i (errno: %i)\n", 10569753Sandreas@sandberg.pp.se discardedSignal, errno); 10579651SAndreas.Sandberg@ARM.com} 10589651SAndreas.Sandberg@ARM.com 10599651SAndreas.Sandberg@ARM.comvoid 10609651SAndreas.Sandberg@ARM.comBaseKvmCPU::setupCounters() 10619651SAndreas.Sandberg@ARM.com{ 10629651SAndreas.Sandberg@ARM.com DPRINTF(Kvm, "Attaching cycle counter...\n"); 10639651SAndreas.Sandberg@ARM.com PerfKvmCounterConfig cfgCycles(PERF_TYPE_HARDWARE, 10649651SAndreas.Sandberg@ARM.com PERF_COUNT_HW_CPU_CYCLES); 10659651SAndreas.Sandberg@ARM.com cfgCycles.disabled(true) 10669651SAndreas.Sandberg@ARM.com .pinned(true); 10679655SAndreas.Sandberg@ARM.com 10689655SAndreas.Sandberg@ARM.com if (perfControlledByTimer) { 10699655SAndreas.Sandberg@ARM.com // We need to configure the cycles counter to send overflows 10709655SAndreas.Sandberg@ARM.com // since we are going to use it to trigger timer signals that 10719655SAndreas.Sandberg@ARM.com // trap back into m5 from KVM. In practice, this means that we 10729655SAndreas.Sandberg@ARM.com // need to set some non-zero sample period that gets 10739655SAndreas.Sandberg@ARM.com // overridden when the timer is armed. 10749655SAndreas.Sandberg@ARM.com cfgCycles.wakeupEvents(1) 10759655SAndreas.Sandberg@ARM.com .samplePeriod(42); 10769655SAndreas.Sandberg@ARM.com } 10779655SAndreas.Sandberg@ARM.com 10789651SAndreas.Sandberg@ARM.com hwCycles.attach(cfgCycles, 10799651SAndreas.Sandberg@ARM.com 0); // TID (0 => currentThread) 10809651SAndreas.Sandberg@ARM.com 10819651SAndreas.Sandberg@ARM.com DPRINTF(Kvm, "Attaching instruction counter...\n"); 10829651SAndreas.Sandberg@ARM.com PerfKvmCounterConfig cfgInstructions(PERF_TYPE_HARDWARE, 10839651SAndreas.Sandberg@ARM.com PERF_COUNT_HW_INSTRUCTIONS); 10849651SAndreas.Sandberg@ARM.com hwInstructions.attach(cfgInstructions, 10859651SAndreas.Sandberg@ARM.com 0, // TID (0 => currentThread) 10869651SAndreas.Sandberg@ARM.com hwCycles); 10879651SAndreas.Sandberg@ARM.com} 10889753Sandreas@sandberg.pp.se 10899753Sandreas@sandberg.pp.sebool 10909753Sandreas@sandberg.pp.seBaseKvmCPU::tryDrain() 10919753Sandreas@sandberg.pp.se{ 10929753Sandreas@sandberg.pp.se if (!drainManager) 10939753Sandreas@sandberg.pp.se return false; 10949753Sandreas@sandberg.pp.se 10959753Sandreas@sandberg.pp.se if (!archIsDrained()) { 10969753Sandreas@sandberg.pp.se DPRINTF(Drain, "tryDrain: Architecture code is not ready.\n"); 10979753Sandreas@sandberg.pp.se return false; 10989753Sandreas@sandberg.pp.se } 10999753Sandreas@sandberg.pp.se 11009753Sandreas@sandberg.pp.se if (_status == Idle || _status == Running) { 11019753Sandreas@sandberg.pp.se DPRINTF(Drain, 11029753Sandreas@sandberg.pp.se "tryDrain: CPU transitioned into the Idle state, drain done\n"); 11039753Sandreas@sandberg.pp.se drainManager->signalDrainDone(); 11049753Sandreas@sandberg.pp.se drainManager = NULL; 11059753Sandreas@sandberg.pp.se return true; 11069753Sandreas@sandberg.pp.se } else { 11079753Sandreas@sandberg.pp.se DPRINTF(Drain, "tryDrain: CPU not ready.\n"); 11089753Sandreas@sandberg.pp.se return false; 11099753Sandreas@sandberg.pp.se } 11109753Sandreas@sandberg.pp.se} 11119753Sandreas@sandberg.pp.se 11129753Sandreas@sandberg.pp.sevoid 11139753Sandreas@sandberg.pp.seBaseKvmCPU::ioctlRun() 11149753Sandreas@sandberg.pp.se{ 11159753Sandreas@sandberg.pp.se if (ioctl(KVM_RUN) == -1) { 11169753Sandreas@sandberg.pp.se if (errno != EINTR) 11179753Sandreas@sandberg.pp.se panic("KVM: Failed to start virtual CPU (errno: %i)\n", 11189753Sandreas@sandberg.pp.se errno); 11199753Sandreas@sandberg.pp.se } 11209753Sandreas@sandberg.pp.se} 1121