vm.cc revision 11614
19651SAndreas.Sandberg@ARM.com/* 210605Sgabeblack@google.com * Copyright 2014 Google, Inc. 310859Sandreas.sandberg@arm.com * Copyright (c) 2012, 2015 ARM Limited 49651SAndreas.Sandberg@ARM.com * All rights reserved 59651SAndreas.Sandberg@ARM.com * 69651SAndreas.Sandberg@ARM.com * The license below extends only to copyright in the software and shall 79651SAndreas.Sandberg@ARM.com * not be construed as granting a license to any other intellectual 89651SAndreas.Sandberg@ARM.com * property including but not limited to intellectual property relating 99651SAndreas.Sandberg@ARM.com * to a hardware implementation of the functionality of the software 109651SAndreas.Sandberg@ARM.com * licensed hereunder. You may use the software subject to the license 119651SAndreas.Sandberg@ARM.com * terms below provided that you ensure that this notice is replicated 129651SAndreas.Sandberg@ARM.com * unmodified and in its entirety in all distributions of the software, 139651SAndreas.Sandberg@ARM.com * modified or unmodified, in source code or in binary form. 149651SAndreas.Sandberg@ARM.com * 159651SAndreas.Sandberg@ARM.com * Redistribution and use in source and binary forms, with or without 169651SAndreas.Sandberg@ARM.com * modification, are permitted provided that the following conditions are 179651SAndreas.Sandberg@ARM.com * met: redistributions of source code must retain the above copyright 189651SAndreas.Sandberg@ARM.com * notice, this list of conditions and the following disclaimer; 199651SAndreas.Sandberg@ARM.com * redistributions in binary form must reproduce the above copyright 209651SAndreas.Sandberg@ARM.com * notice, this list of conditions and the following disclaimer in the 219651SAndreas.Sandberg@ARM.com * documentation and/or other materials provided with the distribution; 229651SAndreas.Sandberg@ARM.com * neither the name of the copyright holders nor the names of its 239651SAndreas.Sandberg@ARM.com * contributors may be used to endorse or promote products derived from 249651SAndreas.Sandberg@ARM.com * this software without specific prior written permission. 259651SAndreas.Sandberg@ARM.com * 269651SAndreas.Sandberg@ARM.com * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 279651SAndreas.Sandberg@ARM.com * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 289651SAndreas.Sandberg@ARM.com * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 299651SAndreas.Sandberg@ARM.com * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 309651SAndreas.Sandberg@ARM.com * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 319651SAndreas.Sandberg@ARM.com * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 329651SAndreas.Sandberg@ARM.com * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 339651SAndreas.Sandberg@ARM.com * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 349651SAndreas.Sandberg@ARM.com * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 359651SAndreas.Sandberg@ARM.com * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 369651SAndreas.Sandberg@ARM.com * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 379651SAndreas.Sandberg@ARM.com * 389651SAndreas.Sandberg@ARM.com * Authors: Andreas Sandberg 399651SAndreas.Sandberg@ARM.com */ 409651SAndreas.Sandberg@ARM.com 419651SAndreas.Sandberg@ARM.com#include <linux/kvm.h> 429651SAndreas.Sandberg@ARM.com#include <sys/ioctl.h> 439651SAndreas.Sandberg@ARM.com#include <sys/stat.h> 449651SAndreas.Sandberg@ARM.com#include <sys/types.h> 459651SAndreas.Sandberg@ARM.com#include <fcntl.h> 469651SAndreas.Sandberg@ARM.com#include <unistd.h> 479651SAndreas.Sandberg@ARM.com 489651SAndreas.Sandberg@ARM.com#include <cerrno> 499883Sandreas@sandberg.pp.se#include <memory> 509651SAndreas.Sandberg@ARM.com 519651SAndreas.Sandberg@ARM.com#include "cpu/kvm/vm.hh" 529651SAndreas.Sandberg@ARM.com#include "debug/Kvm.hh" 539651SAndreas.Sandberg@ARM.com#include "params/KvmVM.hh" 549651SAndreas.Sandberg@ARM.com#include "sim/system.hh" 559651SAndreas.Sandberg@ARM.com 569651SAndreas.Sandberg@ARM.com#define EXPECTED_KVM_API_VERSION 12 579651SAndreas.Sandberg@ARM.com 589651SAndreas.Sandberg@ARM.com#if EXPECTED_KVM_API_VERSION != KVM_API_VERSION 599651SAndreas.Sandberg@ARM.com#error Unsupported KVM version 609651SAndreas.Sandberg@ARM.com#endif 619651SAndreas.Sandberg@ARM.com 629651SAndreas.Sandberg@ARM.comKvm *Kvm::instance = NULL; 639651SAndreas.Sandberg@ARM.com 649651SAndreas.Sandberg@ARM.comKvm::Kvm() 659651SAndreas.Sandberg@ARM.com : kvmFD(-1), apiVersion(-1), vcpuMMapSize(0) 669651SAndreas.Sandberg@ARM.com{ 679651SAndreas.Sandberg@ARM.com kvmFD = ::open("/dev/kvm", O_RDWR); 689651SAndreas.Sandberg@ARM.com if (kvmFD == -1) 699651SAndreas.Sandberg@ARM.com fatal("KVM: Failed to open /dev/kvm\n"); 709651SAndreas.Sandberg@ARM.com 719651SAndreas.Sandberg@ARM.com apiVersion = ioctl(KVM_GET_API_VERSION); 729651SAndreas.Sandberg@ARM.com if (apiVersion != EXPECTED_KVM_API_VERSION) 739651SAndreas.Sandberg@ARM.com fatal("KVM: Incompatible API version\n"); 749651SAndreas.Sandberg@ARM.com 759651SAndreas.Sandberg@ARM.com vcpuMMapSize = ioctl(KVM_GET_VCPU_MMAP_SIZE); 769651SAndreas.Sandberg@ARM.com if (vcpuMMapSize == -1) 779651SAndreas.Sandberg@ARM.com panic("KVM: Failed to get virtual CPU MMAP size\n"); 789651SAndreas.Sandberg@ARM.com} 799651SAndreas.Sandberg@ARM.com 809651SAndreas.Sandberg@ARM.comKvm::~Kvm() 819651SAndreas.Sandberg@ARM.com{ 829651SAndreas.Sandberg@ARM.com close(kvmFD); 839651SAndreas.Sandberg@ARM.com} 849651SAndreas.Sandberg@ARM.com 859651SAndreas.Sandberg@ARM.comKvm * 869651SAndreas.Sandberg@ARM.comKvm::create() 879651SAndreas.Sandberg@ARM.com{ 889651SAndreas.Sandberg@ARM.com if (!instance) 899651SAndreas.Sandberg@ARM.com instance = new Kvm(); 909651SAndreas.Sandberg@ARM.com 919651SAndreas.Sandberg@ARM.com return instance; 929651SAndreas.Sandberg@ARM.com} 939651SAndreas.Sandberg@ARM.com 949651SAndreas.Sandberg@ARM.combool 959651SAndreas.Sandberg@ARM.comKvm::capUserMemory() const 969651SAndreas.Sandberg@ARM.com{ 979651SAndreas.Sandberg@ARM.com return checkExtension(KVM_CAP_USER_MEMORY) != 0; 989651SAndreas.Sandberg@ARM.com} 999651SAndreas.Sandberg@ARM.com 1009651SAndreas.Sandberg@ARM.combool 1019651SAndreas.Sandberg@ARM.comKvm::capSetTSSAddress() const 1029651SAndreas.Sandberg@ARM.com{ 1039651SAndreas.Sandberg@ARM.com return checkExtension(KVM_CAP_SET_TSS_ADDR) != 0; 1049651SAndreas.Sandberg@ARM.com} 1059651SAndreas.Sandberg@ARM.com 1069651SAndreas.Sandberg@ARM.combool 1079651SAndreas.Sandberg@ARM.comKvm::capExtendedCPUID() const 1089651SAndreas.Sandberg@ARM.com{ 1099651SAndreas.Sandberg@ARM.com return checkExtension(KVM_CAP_EXT_CPUID) != 0; 1109651SAndreas.Sandberg@ARM.com} 1119651SAndreas.Sandberg@ARM.com 1129651SAndreas.Sandberg@ARM.combool 1139651SAndreas.Sandberg@ARM.comKvm::capUserNMI() const 1149651SAndreas.Sandberg@ARM.com{ 1159651SAndreas.Sandberg@ARM.com#ifdef KVM_CAP_USER_NMI 1169651SAndreas.Sandberg@ARM.com return checkExtension(KVM_CAP_USER_NMI) != 0; 1179651SAndreas.Sandberg@ARM.com#else 1189651SAndreas.Sandberg@ARM.com return false; 1199651SAndreas.Sandberg@ARM.com#endif 1209651SAndreas.Sandberg@ARM.com} 1219651SAndreas.Sandberg@ARM.com 1229651SAndreas.Sandberg@ARM.comint 1239651SAndreas.Sandberg@ARM.comKvm::capCoalescedMMIO() const 1249651SAndreas.Sandberg@ARM.com{ 1259651SAndreas.Sandberg@ARM.com return checkExtension(KVM_CAP_COALESCED_MMIO); 1269651SAndreas.Sandberg@ARM.com} 1279651SAndreas.Sandberg@ARM.com 12810605Sgabeblack@google.comint 12910605Sgabeblack@google.comKvm::capNumMemSlots() const 13010605Sgabeblack@google.com{ 13110605Sgabeblack@google.com#ifdef KVM_CAP_NR_MEMSLOTS 13210605Sgabeblack@google.com return checkExtension(KVM_CAP_NR_MEMSLOTS); 13310605Sgabeblack@google.com#else 13410605Sgabeblack@google.com return 0; 13510605Sgabeblack@google.com#endif 13610605Sgabeblack@google.com} 13710605Sgabeblack@google.com 1389651SAndreas.Sandberg@ARM.combool 1399651SAndreas.Sandberg@ARM.comKvm::capOneReg() const 1409651SAndreas.Sandberg@ARM.com{ 1419651SAndreas.Sandberg@ARM.com#ifdef KVM_CAP_ONE_REG 1429651SAndreas.Sandberg@ARM.com return checkExtension(KVM_CAP_ONE_REG) != 0; 1439651SAndreas.Sandberg@ARM.com#else 1449651SAndreas.Sandberg@ARM.com return false; 1459651SAndreas.Sandberg@ARM.com#endif 1469651SAndreas.Sandberg@ARM.com} 1479651SAndreas.Sandberg@ARM.com 1489651SAndreas.Sandberg@ARM.combool 1499651SAndreas.Sandberg@ARM.comKvm::capIRQChip() const 1509651SAndreas.Sandberg@ARM.com{ 1519651SAndreas.Sandberg@ARM.com return checkExtension(KVM_CAP_IRQCHIP) != 0; 1529651SAndreas.Sandberg@ARM.com} 1539651SAndreas.Sandberg@ARM.com 1549651SAndreas.Sandberg@ARM.combool 1559883Sandreas@sandberg.pp.seKvm::capVCPUEvents() const 1569883Sandreas@sandberg.pp.se{ 1579883Sandreas@sandberg.pp.se#ifdef KVM_CAP_VCPU_EVENTS 1589883Sandreas@sandberg.pp.se return checkExtension(KVM_CAP_VCPU_EVENTS) != 0; 1599883Sandreas@sandberg.pp.se#else 1609883Sandreas@sandberg.pp.se return false; 1619883Sandreas@sandberg.pp.se#endif 1629883Sandreas@sandberg.pp.se} 1639883Sandreas@sandberg.pp.se 1649883Sandreas@sandberg.pp.sebool 1659883Sandreas@sandberg.pp.seKvm::capDebugRegs() const 1669883Sandreas@sandberg.pp.se{ 1679883Sandreas@sandberg.pp.se#ifdef KVM_CAP_DEBUGREGS 1689883Sandreas@sandberg.pp.se return checkExtension(KVM_CAP_DEBUGREGS) != 0; 1699883Sandreas@sandberg.pp.se#else 1709883Sandreas@sandberg.pp.se return false; 1719883Sandreas@sandberg.pp.se#endif 1729883Sandreas@sandberg.pp.se} 1739883Sandreas@sandberg.pp.se 1749883Sandreas@sandberg.pp.sebool 1759883Sandreas@sandberg.pp.seKvm::capXCRs() const 1769883Sandreas@sandberg.pp.se{ 1779883Sandreas@sandberg.pp.se#ifdef KVM_CAP_XCRS 1789883Sandreas@sandberg.pp.se return checkExtension(KVM_CAP_XCRS) != 0; 1799883Sandreas@sandberg.pp.se#else 1809883Sandreas@sandberg.pp.se return false; 1819883Sandreas@sandberg.pp.se#endif 1829883Sandreas@sandberg.pp.se} 1839883Sandreas@sandberg.pp.se 1849883Sandreas@sandberg.pp.sebool 1859883Sandreas@sandberg.pp.seKvm::capXSave() const 1869883Sandreas@sandberg.pp.se{ 1879883Sandreas@sandberg.pp.se#ifdef KVM_CAP_XSAVE 1889883Sandreas@sandberg.pp.se return checkExtension(KVM_CAP_XSAVE) != 0; 1899883Sandreas@sandberg.pp.se#else 1909883Sandreas@sandberg.pp.se return false; 1919883Sandreas@sandberg.pp.se#endif 1929883Sandreas@sandberg.pp.se} 1939883Sandreas@sandberg.pp.se 19410842Sandreas.sandberg@arm.com 19510842Sandreas.sandberg@arm.com#if defined(__i386__) || defined(__x86_64__) 1969883Sandreas@sandberg.pp.sebool 1979651SAndreas.Sandberg@ARM.comKvm::getSupportedCPUID(struct kvm_cpuid2 &cpuid) const 1989651SAndreas.Sandberg@ARM.com{ 1999651SAndreas.Sandberg@ARM.com if (ioctl(KVM_GET_SUPPORTED_CPUID, (void *)&cpuid) == -1) { 2009651SAndreas.Sandberg@ARM.com if (errno == E2BIG) 2019651SAndreas.Sandberg@ARM.com return false; 2029651SAndreas.Sandberg@ARM.com else 2039651SAndreas.Sandberg@ARM.com panic("KVM: Failed to get supported CPUID (errno: %i)\n", errno); 2049651SAndreas.Sandberg@ARM.com } else 2059651SAndreas.Sandberg@ARM.com return true; 2069651SAndreas.Sandberg@ARM.com} 2079651SAndreas.Sandberg@ARM.com 2089883Sandreas@sandberg.pp.seconst Kvm::CPUIDVector & 2099883Sandreas@sandberg.pp.seKvm::getSupportedCPUID() const 2109883Sandreas@sandberg.pp.se{ 2119883Sandreas@sandberg.pp.se if (supportedCPUIDCache.empty()) { 2129883Sandreas@sandberg.pp.se std::unique_ptr<struct kvm_cpuid2> cpuid; 2139883Sandreas@sandberg.pp.se int i(1); 2149883Sandreas@sandberg.pp.se do { 2159883Sandreas@sandberg.pp.se cpuid.reset((struct kvm_cpuid2 *)operator new( 2169883Sandreas@sandberg.pp.se sizeof(kvm_cpuid2) + i * sizeof(kvm_cpuid_entry2))); 2179883Sandreas@sandberg.pp.se 2189883Sandreas@sandberg.pp.se cpuid->nent = i; 2199883Sandreas@sandberg.pp.se ++i; 2209883Sandreas@sandberg.pp.se } while (!getSupportedCPUID(*cpuid)); 2219883Sandreas@sandberg.pp.se supportedCPUIDCache.assign(cpuid->entries, 2229883Sandreas@sandberg.pp.se cpuid->entries + cpuid->nent); 2239883Sandreas@sandberg.pp.se } 2249883Sandreas@sandberg.pp.se 2259883Sandreas@sandberg.pp.se return supportedCPUIDCache; 2269883Sandreas@sandberg.pp.se} 2279883Sandreas@sandberg.pp.se 2289883Sandreas@sandberg.pp.sebool 2299883Sandreas@sandberg.pp.seKvm::getSupportedMSRs(struct kvm_msr_list &msrs) const 2309883Sandreas@sandberg.pp.se{ 2319883Sandreas@sandberg.pp.se if (ioctl(KVM_GET_MSR_INDEX_LIST, (void *)&msrs) == -1) { 2329883Sandreas@sandberg.pp.se if (errno == E2BIG) 2339883Sandreas@sandberg.pp.se return false; 2349883Sandreas@sandberg.pp.se else 2359883Sandreas@sandberg.pp.se panic("KVM: Failed to get supported CPUID (errno: %i)\n", errno); 2369883Sandreas@sandberg.pp.se } else 2379883Sandreas@sandberg.pp.se return true; 2389883Sandreas@sandberg.pp.se} 2399883Sandreas@sandberg.pp.se 2409883Sandreas@sandberg.pp.seconst Kvm::MSRIndexVector & 2419883Sandreas@sandberg.pp.seKvm::getSupportedMSRs() const 2429883Sandreas@sandberg.pp.se{ 2439883Sandreas@sandberg.pp.se if (supportedMSRCache.empty()) { 2449883Sandreas@sandberg.pp.se std::unique_ptr<struct kvm_msr_list> msrs; 2459883Sandreas@sandberg.pp.se int i(0); 2469883Sandreas@sandberg.pp.se do { 2479883Sandreas@sandberg.pp.se msrs.reset((struct kvm_msr_list *)operator new( 2489883Sandreas@sandberg.pp.se sizeof(kvm_msr_list) + i * sizeof(uint32_t))); 2499883Sandreas@sandberg.pp.se 2509883Sandreas@sandberg.pp.se msrs->nmsrs = i; 2519883Sandreas@sandberg.pp.se ++i; 2529883Sandreas@sandberg.pp.se } while (!getSupportedMSRs(*msrs)); 2539883Sandreas@sandberg.pp.se supportedMSRCache.assign(msrs->indices, msrs->indices + msrs->nmsrs); 2549883Sandreas@sandberg.pp.se } 2559883Sandreas@sandberg.pp.se 2569883Sandreas@sandberg.pp.se return supportedMSRCache; 2579883Sandreas@sandberg.pp.se} 2589883Sandreas@sandberg.pp.se 25910842Sandreas.sandberg@arm.com#endif // x86-specific 26010842Sandreas.sandberg@arm.com 26110842Sandreas.sandberg@arm.com 2629651SAndreas.Sandberg@ARM.comint 2639651SAndreas.Sandberg@ARM.comKvm::checkExtension(int extension) const 2649651SAndreas.Sandberg@ARM.com{ 2659651SAndreas.Sandberg@ARM.com int ret = ioctl(KVM_CHECK_EXTENSION, extension); 2669651SAndreas.Sandberg@ARM.com if (ret == -1) 2679651SAndreas.Sandberg@ARM.com panic("KVM: ioctl failed when checking for extension\n"); 2689651SAndreas.Sandberg@ARM.com return ret; 2699651SAndreas.Sandberg@ARM.com} 2709651SAndreas.Sandberg@ARM.com 2719651SAndreas.Sandberg@ARM.comint 2729651SAndreas.Sandberg@ARM.comKvm::ioctl(int request, long p1) const 2739651SAndreas.Sandberg@ARM.com{ 2749651SAndreas.Sandberg@ARM.com assert(kvmFD != -1); 2759651SAndreas.Sandberg@ARM.com 2769651SAndreas.Sandberg@ARM.com return ::ioctl(kvmFD, request, p1); 2779651SAndreas.Sandberg@ARM.com} 2789651SAndreas.Sandberg@ARM.com 2799651SAndreas.Sandberg@ARM.comint 2809651SAndreas.Sandberg@ARM.comKvm::createVM() 2819651SAndreas.Sandberg@ARM.com{ 2829651SAndreas.Sandberg@ARM.com int vmFD; 2839651SAndreas.Sandberg@ARM.com 2849651SAndreas.Sandberg@ARM.com vmFD = ioctl(KVM_CREATE_VM); 2859651SAndreas.Sandberg@ARM.com if (vmFD == -1) 2869651SAndreas.Sandberg@ARM.com panic("Failed to create KVM VM\n"); 2879651SAndreas.Sandberg@ARM.com 2889651SAndreas.Sandberg@ARM.com return vmFD; 2899651SAndreas.Sandberg@ARM.com} 2909651SAndreas.Sandberg@ARM.com 2919651SAndreas.Sandberg@ARM.com 2929651SAndreas.Sandberg@ARM.comKvmVM::KvmVM(KvmVMParams *params) 2939651SAndreas.Sandberg@ARM.com : SimObject(params), 29411363Sandreas@sandberg.pp.se kvm(new Kvm()), system(params->system), 29511363Sandreas@sandberg.pp.se vmFD(kvm->createVM()), 2969651SAndreas.Sandberg@ARM.com started(false), 2979651SAndreas.Sandberg@ARM.com nextVCPUID(0) 2989651SAndreas.Sandberg@ARM.com{ 29911363Sandreas@sandberg.pp.se maxMemorySlot = kvm->capNumMemSlots(); 30010605Sgabeblack@google.com /* If we couldn't determine how memory slots there are, guess 32. */ 30110605Sgabeblack@google.com if (!maxMemorySlot) 30210605Sgabeblack@google.com maxMemorySlot = 32; 3039651SAndreas.Sandberg@ARM.com /* Setup the coalesced MMIO regions */ 3049651SAndreas.Sandberg@ARM.com for (int i = 0; i < params->coalescedMMIO.size(); ++i) 3059651SAndreas.Sandberg@ARM.com coalesceMMIO(params->coalescedMMIO[i]); 3069651SAndreas.Sandberg@ARM.com} 3079651SAndreas.Sandberg@ARM.com 3089651SAndreas.Sandberg@ARM.comKvmVM::~KvmVM() 3099651SAndreas.Sandberg@ARM.com{ 31011363Sandreas@sandberg.pp.se if (vmFD != -1) 31111363Sandreas@sandberg.pp.se close(vmFD); 31211363Sandreas@sandberg.pp.se 31311363Sandreas@sandberg.pp.se if (kvm) 31411363Sandreas@sandberg.pp.se delete kvm; 31511363Sandreas@sandberg.pp.se} 31611363Sandreas@sandberg.pp.se 31711363Sandreas@sandberg.pp.sevoid 31811363Sandreas@sandberg.pp.seKvmVM::notifyFork() 31911363Sandreas@sandberg.pp.se{ 32011363Sandreas@sandberg.pp.se if (vmFD != -1) { 32111363Sandreas@sandberg.pp.se if (close(vmFD) == -1) 32211363Sandreas@sandberg.pp.se warn("kvm VM: notifyFork failed to close vmFD\n"); 32311363Sandreas@sandberg.pp.se 32411363Sandreas@sandberg.pp.se vmFD = -1; 32511363Sandreas@sandberg.pp.se 32611363Sandreas@sandberg.pp.se delete kvm; 32711363Sandreas@sandberg.pp.se kvm = NULL; 32811363Sandreas@sandberg.pp.se } 3299651SAndreas.Sandberg@ARM.com} 3309651SAndreas.Sandberg@ARM.com 3319651SAndreas.Sandberg@ARM.comvoid 3329651SAndreas.Sandberg@ARM.comKvmVM::cpuStartup() 3339651SAndreas.Sandberg@ARM.com{ 3349651SAndreas.Sandberg@ARM.com if (started) 3359651SAndreas.Sandberg@ARM.com return; 3369651SAndreas.Sandberg@ARM.com started = true; 3379651SAndreas.Sandberg@ARM.com 3389651SAndreas.Sandberg@ARM.com delayedStartup(); 3399651SAndreas.Sandberg@ARM.com} 3409651SAndreas.Sandberg@ARM.com 3419651SAndreas.Sandberg@ARM.comvoid 3429651SAndreas.Sandberg@ARM.comKvmVM::delayedStartup() 3439651SAndreas.Sandberg@ARM.com{ 34411614Sdavid.j.hashe@gmail.com const std::vector<BackingStoreEntry> &memories( 3459651SAndreas.Sandberg@ARM.com system->getPhysMem().getBackingStore()); 3469651SAndreas.Sandberg@ARM.com 3479651SAndreas.Sandberg@ARM.com DPRINTF(Kvm, "Mapping %i memory region(s)\n", memories.size()); 3489651SAndreas.Sandberg@ARM.com for (int slot(0); slot < memories.size(); ++slot) { 34911614Sdavid.j.hashe@gmail.com if (!memories[slot].kvmMap) { 35011614Sdavid.j.hashe@gmail.com DPRINTF(Kvm, "Skipping region marked as not usable by KVM\n"); 35111614Sdavid.j.hashe@gmail.com continue; 35211614Sdavid.j.hashe@gmail.com } 35311614Sdavid.j.hashe@gmail.com 35411614Sdavid.j.hashe@gmail.com const AddrRange &range(memories[slot].range); 35511614Sdavid.j.hashe@gmail.com void *pmem(memories[slot].pmem); 3569651SAndreas.Sandberg@ARM.com 3579651SAndreas.Sandberg@ARM.com if (pmem) { 3589651SAndreas.Sandberg@ARM.com DPRINTF(Kvm, "Mapping region: 0x%p -> 0x%llx [size: 0x%llx]\n", 3599651SAndreas.Sandberg@ARM.com pmem, range.start(), range.size()); 3609651SAndreas.Sandberg@ARM.com 36110605Sgabeblack@google.com if (range.interleaved()) { 36210605Sgabeblack@google.com panic("Tried to map an interleaved memory range into " 36310605Sgabeblack@google.com "a KVM VM.\n"); 36410605Sgabeblack@google.com } 36510605Sgabeblack@google.com 36610605Sgabeblack@google.com const MemSlot slot = allocMemSlot(range.size()); 36710605Sgabeblack@google.com setupMemSlot(slot, pmem, range.start(), 0/* flags */); 3689651SAndreas.Sandberg@ARM.com } else { 3699651SAndreas.Sandberg@ARM.com DPRINTF(Kvm, "Zero-region not mapped: [0x%llx]\n", range.start()); 3709651SAndreas.Sandberg@ARM.com hack("KVM: Zero memory handled as IO\n"); 3719651SAndreas.Sandberg@ARM.com } 3729651SAndreas.Sandberg@ARM.com } 3739651SAndreas.Sandberg@ARM.com} 3749651SAndreas.Sandberg@ARM.com 37510605Sgabeblack@google.comconst KvmVM::MemSlot 37610605Sgabeblack@google.comKvmVM::allocMemSlot(uint64_t size) 37710605Sgabeblack@google.com{ 37810605Sgabeblack@google.com if (!size) 37910605Sgabeblack@google.com panic("Memory slots must have non-zero size.\n"); 38010605Sgabeblack@google.com 38110605Sgabeblack@google.com std::vector<MemorySlot>::iterator pos; 38210605Sgabeblack@google.com for (pos = memorySlots.begin(); pos != memorySlots.end(); pos++) { 38310605Sgabeblack@google.com if (!pos->size) { 38410605Sgabeblack@google.com pos->size = size; 38510605Sgabeblack@google.com pos->active = false; 38610605Sgabeblack@google.com return pos->slot; 38710605Sgabeblack@google.com } 38810605Sgabeblack@google.com } 38910605Sgabeblack@google.com 39010605Sgabeblack@google.com uint32_t nextSlot = memorySlots.size(); 39110605Sgabeblack@google.com if (nextSlot > maxMemorySlot) 39210605Sgabeblack@google.com panic("Out of memory slots.\n"); 39310605Sgabeblack@google.com 39410605Sgabeblack@google.com MemorySlot slot; 39510605Sgabeblack@google.com slot.size = size; 39610605Sgabeblack@google.com slot.slot = nextSlot; 39710605Sgabeblack@google.com slot.active = false; 39810605Sgabeblack@google.com 39910605Sgabeblack@google.com memorySlots.push_back(slot); 40010605Sgabeblack@google.com return MemSlot(slot.slot); 40110605Sgabeblack@google.com} 40210605Sgabeblack@google.com 4039651SAndreas.Sandberg@ARM.comvoid 40410605Sgabeblack@google.comKvmVM::setupMemSlot(const KvmVM::MemSlot num, void *host_addr, Addr guest, 40510605Sgabeblack@google.com uint32_t flags) 4069651SAndreas.Sandberg@ARM.com{ 40710605Sgabeblack@google.com MemorySlot &slot = memorySlots.at(num.num); 40810605Sgabeblack@google.com slot.active = true; 40910605Sgabeblack@google.com setUserMemoryRegion(num.num, host_addr, guest, slot.size, flags); 41010605Sgabeblack@google.com} 4119651SAndreas.Sandberg@ARM.com 41210605Sgabeblack@google.comvoid 41310605Sgabeblack@google.comKvmVM::disableMemSlot(const KvmVM::MemSlot num) 41410605Sgabeblack@google.com{ 41510605Sgabeblack@google.com MemorySlot &slot = memorySlots.at(num.num); 41610605Sgabeblack@google.com if (slot.active) 41710605Sgabeblack@google.com setUserMemoryRegion(num.num, NULL, 0, 0, 0); 41810605Sgabeblack@google.com slot.active = false; 41910605Sgabeblack@google.com} 42010605Sgabeblack@google.com 42110605Sgabeblack@google.comvoid 42210605Sgabeblack@google.comKvmVM::freeMemSlot(const KvmVM::MemSlot num) 42310605Sgabeblack@google.com{ 42410605Sgabeblack@google.com disableMemSlot(num.num); 42510605Sgabeblack@google.com MemorySlot &slot = memorySlots.at(num.num); 42610605Sgabeblack@google.com slot.size = 0; 4279651SAndreas.Sandberg@ARM.com} 4289651SAndreas.Sandberg@ARM.com 4299651SAndreas.Sandberg@ARM.comvoid 4309651SAndreas.Sandberg@ARM.comKvmVM::setUserMemoryRegion(uint32_t slot, 4319651SAndreas.Sandberg@ARM.com void *host_addr, Addr guest_addr, 4329651SAndreas.Sandberg@ARM.com uint64_t len, uint32_t flags) 4339651SAndreas.Sandberg@ARM.com{ 4349651SAndreas.Sandberg@ARM.com struct kvm_userspace_memory_region m; 4359651SAndreas.Sandberg@ARM.com 4369651SAndreas.Sandberg@ARM.com memset(&m, 0, sizeof(m)); 4379651SAndreas.Sandberg@ARM.com m.slot = slot; 4389651SAndreas.Sandberg@ARM.com m.flags = flags; 4399651SAndreas.Sandberg@ARM.com m.guest_phys_addr = (uint64_t)guest_addr; 4409651SAndreas.Sandberg@ARM.com m.memory_size = len; 4419651SAndreas.Sandberg@ARM.com m.userspace_addr = (__u64)host_addr; 4429651SAndreas.Sandberg@ARM.com 4439651SAndreas.Sandberg@ARM.com if (ioctl(KVM_SET_USER_MEMORY_REGION, (void *)&m) == -1) { 4449651SAndreas.Sandberg@ARM.com panic("Failed to setup KVM memory region:\n" 4459651SAndreas.Sandberg@ARM.com "\tHost Address: 0x%p\n" 4469651SAndreas.Sandberg@ARM.com "\tGuest Address: 0x%llx\n", 4479651SAndreas.Sandberg@ARM.com "\tSize: %ll\n", 4489651SAndreas.Sandberg@ARM.com "\tFlags: 0x%x\n", 4499651SAndreas.Sandberg@ARM.com m.userspace_addr, m.guest_phys_addr, 4509651SAndreas.Sandberg@ARM.com m.memory_size, m.flags); 4519651SAndreas.Sandberg@ARM.com } 4529651SAndreas.Sandberg@ARM.com} 4539651SAndreas.Sandberg@ARM.com 4549651SAndreas.Sandberg@ARM.comvoid 4559651SAndreas.Sandberg@ARM.comKvmVM::coalesceMMIO(const AddrRange &range) 4569651SAndreas.Sandberg@ARM.com{ 4579651SAndreas.Sandberg@ARM.com coalesceMMIO(range.start(), range.size()); 4589651SAndreas.Sandberg@ARM.com} 4599651SAndreas.Sandberg@ARM.com 4609651SAndreas.Sandberg@ARM.comvoid 4619651SAndreas.Sandberg@ARM.comKvmVM::coalesceMMIO(Addr start, int size) 4629651SAndreas.Sandberg@ARM.com{ 4639651SAndreas.Sandberg@ARM.com struct kvm_coalesced_mmio_zone zone; 4649651SAndreas.Sandberg@ARM.com 4659651SAndreas.Sandberg@ARM.com zone.addr = start; 4669651SAndreas.Sandberg@ARM.com zone.size = size; 4679651SAndreas.Sandberg@ARM.com zone.pad = 0; 4689651SAndreas.Sandberg@ARM.com 4699651SAndreas.Sandberg@ARM.com DPRINTF(Kvm, "KVM: Registering coalesced MMIO region [0x%x, 0x%x]\n", 4709651SAndreas.Sandberg@ARM.com zone.addr, zone.addr + zone.size - 1); 4719651SAndreas.Sandberg@ARM.com if (ioctl(KVM_REGISTER_COALESCED_MMIO, (void *)&zone) == -1) 4729651SAndreas.Sandberg@ARM.com panic("KVM: Failed to register coalesced MMIO region (%i)\n", 4739651SAndreas.Sandberg@ARM.com errno); 4749651SAndreas.Sandberg@ARM.com} 4759651SAndreas.Sandberg@ARM.com 4769651SAndreas.Sandberg@ARM.comvoid 4779651SAndreas.Sandberg@ARM.comKvmVM::setTSSAddress(Addr tss_address) 4789651SAndreas.Sandberg@ARM.com{ 4799651SAndreas.Sandberg@ARM.com if (ioctl(KVM_SET_TSS_ADDR, (unsigned long)tss_address) == -1) 4809651SAndreas.Sandberg@ARM.com panic("KVM: Failed to set VM TSS address\n"); 4819651SAndreas.Sandberg@ARM.com} 4829651SAndreas.Sandberg@ARM.com 4839651SAndreas.Sandberg@ARM.comvoid 4849651SAndreas.Sandberg@ARM.comKvmVM::createIRQChip() 4859651SAndreas.Sandberg@ARM.com{ 4869651SAndreas.Sandberg@ARM.com if (_hasKernelIRQChip) 4879651SAndreas.Sandberg@ARM.com panic("KvmVM::createIRQChip called twice.\n"); 4889651SAndreas.Sandberg@ARM.com 4899651SAndreas.Sandberg@ARM.com if (ioctl(KVM_CREATE_IRQCHIP) != -1) { 4909651SAndreas.Sandberg@ARM.com _hasKernelIRQChip = true; 4919651SAndreas.Sandberg@ARM.com } else { 4929651SAndreas.Sandberg@ARM.com warn("KVM: Failed to create in-kernel IRQ chip (errno: %i)\n", 4939651SAndreas.Sandberg@ARM.com errno); 4949651SAndreas.Sandberg@ARM.com _hasKernelIRQChip = false; 4959651SAndreas.Sandberg@ARM.com } 4969651SAndreas.Sandberg@ARM.com} 4979651SAndreas.Sandberg@ARM.com 4989651SAndreas.Sandberg@ARM.comvoid 4999651SAndreas.Sandberg@ARM.comKvmVM::setIRQLine(uint32_t irq, bool high) 5009651SAndreas.Sandberg@ARM.com{ 5019651SAndreas.Sandberg@ARM.com struct kvm_irq_level kvm_level; 5029651SAndreas.Sandberg@ARM.com 5039651SAndreas.Sandberg@ARM.com kvm_level.irq = irq; 5049651SAndreas.Sandberg@ARM.com kvm_level.level = high ? 1 : 0; 5059651SAndreas.Sandberg@ARM.com 5069651SAndreas.Sandberg@ARM.com if (ioctl(KVM_IRQ_LINE, &kvm_level) == -1) 5079651SAndreas.Sandberg@ARM.com panic("KVM: Failed to set IRQ line level (errno: %i)\n", 5089651SAndreas.Sandberg@ARM.com errno); 5099651SAndreas.Sandberg@ARM.com} 5109651SAndreas.Sandberg@ARM.com 5119651SAndreas.Sandberg@ARM.comint 51210859Sandreas.sandberg@arm.comKvmVM::createDevice(uint32_t type, uint32_t flags) 51310859Sandreas.sandberg@arm.com{ 51410859Sandreas.sandberg@arm.com#if defined(KVM_CREATE_DEVICE) 51510859Sandreas.sandberg@arm.com struct kvm_create_device dev = { type, 0, flags }; 51610859Sandreas.sandberg@arm.com 51710859Sandreas.sandberg@arm.com if (ioctl(KVM_CREATE_DEVICE, &dev) == -1) { 51810859Sandreas.sandberg@arm.com panic("KVM: Failed to create device (errno: %i)\n", 51910859Sandreas.sandberg@arm.com errno); 52010859Sandreas.sandberg@arm.com } 52110859Sandreas.sandberg@arm.com 52210859Sandreas.sandberg@arm.com return dev.fd; 52310859Sandreas.sandberg@arm.com#else 52410859Sandreas.sandberg@arm.com panic("Kernel headers don't support KVM_CREATE_DEVICE\n"); 52510859Sandreas.sandberg@arm.com#endif 52610859Sandreas.sandberg@arm.com} 52710859Sandreas.sandberg@arm.com 52810859Sandreas.sandberg@arm.comint 5299651SAndreas.Sandberg@ARM.comKvmVM::createVCPU(long vcpuID) 5309651SAndreas.Sandberg@ARM.com{ 5319651SAndreas.Sandberg@ARM.com int fd; 5329651SAndreas.Sandberg@ARM.com 5339651SAndreas.Sandberg@ARM.com fd = ioctl(KVM_CREATE_VCPU, vcpuID); 5349651SAndreas.Sandberg@ARM.com if (fd == -1) 5359651SAndreas.Sandberg@ARM.com panic("KVM: Failed to create virtual CPU"); 5369651SAndreas.Sandberg@ARM.com 5379651SAndreas.Sandberg@ARM.com return fd; 5389651SAndreas.Sandberg@ARM.com} 5399651SAndreas.Sandberg@ARM.com 5409651SAndreas.Sandberg@ARM.comlong 5419651SAndreas.Sandberg@ARM.comKvmVM::allocVCPUID() 5429651SAndreas.Sandberg@ARM.com{ 5439651SAndreas.Sandberg@ARM.com return nextVCPUID++; 5449651SAndreas.Sandberg@ARM.com} 5459651SAndreas.Sandberg@ARM.com 54610860Sandreas.sandberg@arm.com#if defined(__aarch64__) 54710860Sandreas.sandberg@arm.comvoid 54810860Sandreas.sandberg@arm.comKvmVM::kvmArmPreferredTarget(struct kvm_vcpu_init &target) const 54910860Sandreas.sandberg@arm.com{ 55010860Sandreas.sandberg@arm.com if (ioctl(KVM_ARM_PREFERRED_TARGET, &target) == -1) { 55110860Sandreas.sandberg@arm.com panic("KVM: Failed to get ARM preferred CPU target (errno: %i)\n", 55210860Sandreas.sandberg@arm.com errno); 55310860Sandreas.sandberg@arm.com } 55410860Sandreas.sandberg@arm.com} 55510860Sandreas.sandberg@arm.com#endif 55610860Sandreas.sandberg@arm.com 5579651SAndreas.Sandberg@ARM.comint 5589651SAndreas.Sandberg@ARM.comKvmVM::ioctl(int request, long p1) const 5599651SAndreas.Sandberg@ARM.com{ 5609651SAndreas.Sandberg@ARM.com assert(vmFD != -1); 5619651SAndreas.Sandberg@ARM.com 5629651SAndreas.Sandberg@ARM.com return ::ioctl(vmFD, request, p1); 5639651SAndreas.Sandberg@ARM.com} 5649651SAndreas.Sandberg@ARM.com 5659651SAndreas.Sandberg@ARM.com 5669651SAndreas.Sandberg@ARM.comKvmVM * 5679651SAndreas.Sandberg@ARM.comKvmVMParams::create() 5689651SAndreas.Sandberg@ARM.com{ 5699651SAndreas.Sandberg@ARM.com static bool created = false; 5709651SAndreas.Sandberg@ARM.com if (created) 5719651SAndreas.Sandberg@ARM.com warn_once("Use of multiple KvmVMs is currently untested!\n"); 5729651SAndreas.Sandberg@ARM.com 5739651SAndreas.Sandberg@ARM.com created = true; 5749651SAndreas.Sandberg@ARM.com 5759651SAndreas.Sandberg@ARM.com return new KvmVM(this); 5769651SAndreas.Sandberg@ARM.com} 577