2013-04-22 19:20:32 +02:00
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/*
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2014-12-10 06:53:44 +01:00
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* Copyright 2014 Google, Inc.
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2015-06-01 20:44:17 +02:00
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* Copyright (c) 2012, 2015 ARM Limited
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2013-04-22 19:20:32 +02:00
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* All rights reserved
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*
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* The license below extends only to copyright in the software and shall
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* not be construed as granting a license to any other intellectual
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* property including but not limited to intellectual property relating
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* to a hardware implementation of the functionality of the software
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* licensed hereunder. You may use the software subject to the license
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* terms below provided that you ensure that this notice is replicated
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* unmodified and in its entirety in all distributions of the software,
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* modified or unmodified, in source code or in binary form.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are
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* met: redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer;
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* redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution;
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* neither the name of the copyright holders nor the names of its
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* contributors may be used to endorse or promote products derived from
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* this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* Authors: Andreas Sandberg
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*/
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2016-11-09 21:27:37 +01:00
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#include "cpu/kvm/vm.hh"
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#include <fcntl.h>
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2013-04-22 19:20:32 +02:00
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#include <linux/kvm.h>
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#include <sys/ioctl.h>
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#include <sys/stat.h>
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#include <sys/types.h>
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#include <unistd.h>
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#include <cerrno>
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2013-09-25 12:24:26 +02:00
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#include <memory>
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2013-04-22 19:20:32 +02:00
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#include "debug/Kvm.hh"
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#include "params/KvmVM.hh"
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#include "sim/system.hh"
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#define EXPECTED_KVM_API_VERSION 12
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#if EXPECTED_KVM_API_VERSION != KVM_API_VERSION
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#error Unsupported KVM version
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#endif
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Kvm *Kvm::instance = NULL;
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Kvm::Kvm()
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: kvmFD(-1), apiVersion(-1), vcpuMMapSize(0)
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{
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kvmFD = ::open("/dev/kvm", O_RDWR);
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if (kvmFD == -1)
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fatal("KVM: Failed to open /dev/kvm\n");
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apiVersion = ioctl(KVM_GET_API_VERSION);
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if (apiVersion != EXPECTED_KVM_API_VERSION)
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fatal("KVM: Incompatible API version\n");
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vcpuMMapSize = ioctl(KVM_GET_VCPU_MMAP_SIZE);
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if (vcpuMMapSize == -1)
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panic("KVM: Failed to get virtual CPU MMAP size\n");
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}
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Kvm::~Kvm()
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{
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close(kvmFD);
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}
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Kvm *
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Kvm::create()
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{
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if (!instance)
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instance = new Kvm();
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return instance;
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}
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bool
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Kvm::capUserMemory() const
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{
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return checkExtension(KVM_CAP_USER_MEMORY) != 0;
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}
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bool
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Kvm::capSetTSSAddress() const
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{
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return checkExtension(KVM_CAP_SET_TSS_ADDR) != 0;
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}
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bool
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Kvm::capExtendedCPUID() const
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{
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return checkExtension(KVM_CAP_EXT_CPUID) != 0;
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}
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bool
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Kvm::capUserNMI() const
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{
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#ifdef KVM_CAP_USER_NMI
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return checkExtension(KVM_CAP_USER_NMI) != 0;
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#else
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return false;
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#endif
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}
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int
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Kvm::capCoalescedMMIO() const
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{
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return checkExtension(KVM_CAP_COALESCED_MMIO);
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}
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2014-12-10 06:53:44 +01:00
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int
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Kvm::capNumMemSlots() const
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{
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#ifdef KVM_CAP_NR_MEMSLOTS
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return checkExtension(KVM_CAP_NR_MEMSLOTS);
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#else
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return 0;
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#endif
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}
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2013-04-22 19:20:32 +02:00
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bool
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Kvm::capOneReg() const
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{
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#ifdef KVM_CAP_ONE_REG
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return checkExtension(KVM_CAP_ONE_REG) != 0;
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#else
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return false;
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#endif
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}
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bool
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Kvm::capIRQChip() const
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{
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return checkExtension(KVM_CAP_IRQCHIP) != 0;
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}
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2013-09-25 12:24:26 +02:00
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bool
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Kvm::capVCPUEvents() const
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{
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#ifdef KVM_CAP_VCPU_EVENTS
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return checkExtension(KVM_CAP_VCPU_EVENTS) != 0;
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#else
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return false;
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#endif
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}
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bool
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Kvm::capDebugRegs() const
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{
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#ifdef KVM_CAP_DEBUGREGS
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return checkExtension(KVM_CAP_DEBUGREGS) != 0;
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#else
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return false;
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#endif
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}
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bool
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Kvm::capXCRs() const
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{
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#ifdef KVM_CAP_XCRS
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return checkExtension(KVM_CAP_XCRS) != 0;
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#else
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return false;
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#endif
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}
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bool
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Kvm::capXSave() const
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{
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#ifdef KVM_CAP_XSAVE
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return checkExtension(KVM_CAP_XSAVE) != 0;
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#else
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return false;
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#endif
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}
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2015-05-23 14:37:20 +02:00
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#if defined(__i386__) || defined(__x86_64__)
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2013-04-22 19:20:32 +02:00
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bool
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Kvm::getSupportedCPUID(struct kvm_cpuid2 &cpuid) const
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{
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if (ioctl(KVM_GET_SUPPORTED_CPUID, (void *)&cpuid) == -1) {
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if (errno == E2BIG)
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return false;
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else
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panic("KVM: Failed to get supported CPUID (errno: %i)\n", errno);
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} else
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return true;
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}
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2013-09-25 12:24:26 +02:00
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const Kvm::CPUIDVector &
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Kvm::getSupportedCPUID() const
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{
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if (supportedCPUIDCache.empty()) {
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std::unique_ptr<struct kvm_cpuid2> cpuid;
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int i(1);
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do {
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cpuid.reset((struct kvm_cpuid2 *)operator new(
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sizeof(kvm_cpuid2) + i * sizeof(kvm_cpuid_entry2)));
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cpuid->nent = i;
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++i;
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} while (!getSupportedCPUID(*cpuid));
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supportedCPUIDCache.assign(cpuid->entries,
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cpuid->entries + cpuid->nent);
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}
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return supportedCPUIDCache;
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}
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bool
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Kvm::getSupportedMSRs(struct kvm_msr_list &msrs) const
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{
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if (ioctl(KVM_GET_MSR_INDEX_LIST, (void *)&msrs) == -1) {
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if (errno == E2BIG)
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return false;
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else
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panic("KVM: Failed to get supported CPUID (errno: %i)\n", errno);
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} else
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return true;
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}
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const Kvm::MSRIndexVector &
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Kvm::getSupportedMSRs() const
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{
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if (supportedMSRCache.empty()) {
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std::unique_ptr<struct kvm_msr_list> msrs;
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int i(0);
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do {
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msrs.reset((struct kvm_msr_list *)operator new(
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sizeof(kvm_msr_list) + i * sizeof(uint32_t)));
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msrs->nmsrs = i;
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++i;
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} while (!getSupportedMSRs(*msrs));
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supportedMSRCache.assign(msrs->indices, msrs->indices + msrs->nmsrs);
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}
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return supportedMSRCache;
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}
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2015-05-23 14:37:20 +02:00
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#endif // x86-specific
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2013-04-22 19:20:32 +02:00
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int
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Kvm::checkExtension(int extension) const
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{
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int ret = ioctl(KVM_CHECK_EXTENSION, extension);
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if (ret == -1)
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panic("KVM: ioctl failed when checking for extension\n");
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return ret;
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}
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int
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Kvm::ioctl(int request, long p1) const
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{
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assert(kvmFD != -1);
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return ::ioctl(kvmFD, request, p1);
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}
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int
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Kvm::createVM()
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{
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int vmFD;
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vmFD = ioctl(KVM_CREATE_VM);
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if (vmFD == -1)
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panic("Failed to create KVM VM\n");
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return vmFD;
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}
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KvmVM::KvmVM(KvmVMParams *params)
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: SimObject(params),
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2015-11-27 15:52:10 +01:00
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kvm(new Kvm()), system(params->system),
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vmFD(kvm->createVM()),
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2013-04-22 19:20:32 +02:00
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started(false),
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nextVCPUID(0)
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{
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2015-11-27 15:52:10 +01:00
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maxMemorySlot = kvm->capNumMemSlots();
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2014-12-10 06:53:44 +01:00
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/* If we couldn't determine how memory slots there are, guess 32. */
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if (!maxMemorySlot)
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maxMemorySlot = 32;
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2013-04-22 19:20:32 +02:00
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/* Setup the coalesced MMIO regions */
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for (int i = 0; i < params->coalescedMMIO.size(); ++i)
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coalesceMMIO(params->coalescedMMIO[i]);
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}
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KvmVM::~KvmVM()
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{
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2015-11-27 15:52:10 +01:00
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if (vmFD != -1)
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close(vmFD);
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if (kvm)
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delete kvm;
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}
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void
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KvmVM::notifyFork()
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{
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if (vmFD != -1) {
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if (close(vmFD) == -1)
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warn("kvm VM: notifyFork failed to close vmFD\n");
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vmFD = -1;
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delete kvm;
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kvm = NULL;
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}
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2013-04-22 19:20:32 +02:00
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}
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void
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KvmVM::cpuStartup()
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{
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if (started)
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return;
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started = true;
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delayedStartup();
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}
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void
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KvmVM::delayedStartup()
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{
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2016-08-22 17:41:05 +02:00
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const std::vector<BackingStoreEntry> &memories(
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2013-04-22 19:20:32 +02:00
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system->getPhysMem().getBackingStore());
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DPRINTF(Kvm, "Mapping %i memory region(s)\n", memories.size());
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for (int slot(0); slot < memories.size(); ++slot) {
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2016-08-22 17:41:05 +02:00
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if (!memories[slot].kvmMap) {
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DPRINTF(Kvm, "Skipping region marked as not usable by KVM\n");
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continue;
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}
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const AddrRange &range(memories[slot].range);
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void *pmem(memories[slot].pmem);
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2013-04-22 19:20:32 +02:00
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if (pmem) {
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DPRINTF(Kvm, "Mapping region: 0x%p -> 0x%llx [size: 0x%llx]\n",
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pmem, range.start(), range.size());
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|
2014-12-10 06:53:44 +01:00
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if (range.interleaved()) {
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panic("Tried to map an interleaved memory range into "
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"a KVM VM.\n");
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}
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const MemSlot slot = allocMemSlot(range.size());
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setupMemSlot(slot, pmem, range.start(), 0/* flags */);
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2013-04-22 19:20:32 +02:00
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} else {
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DPRINTF(Kvm, "Zero-region not mapped: [0x%llx]\n", range.start());
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hack("KVM: Zero memory handled as IO\n");
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}
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}
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}
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|
2014-12-10 06:53:44 +01:00
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const KvmVM::MemSlot
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KvmVM::allocMemSlot(uint64_t size)
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{
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if (!size)
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panic("Memory slots must have non-zero size.\n");
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|
|
|
|
|
|
std::vector<MemorySlot>::iterator pos;
|
|
|
|
for (pos = memorySlots.begin(); pos != memorySlots.end(); pos++) {
|
|
|
|
if (!pos->size) {
|
|
|
|
pos->size = size;
|
|
|
|
pos->active = false;
|
|
|
|
return pos->slot;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
uint32_t nextSlot = memorySlots.size();
|
|
|
|
if (nextSlot > maxMemorySlot)
|
|
|
|
panic("Out of memory slots.\n");
|
|
|
|
|
|
|
|
MemorySlot slot;
|
|
|
|
slot.size = size;
|
|
|
|
slot.slot = nextSlot;
|
|
|
|
slot.active = false;
|
|
|
|
|
|
|
|
memorySlots.push_back(slot);
|
|
|
|
return MemSlot(slot.slot);
|
|
|
|
}
|
|
|
|
|
2013-04-22 19:20:32 +02:00
|
|
|
void
|
2014-12-10 06:53:44 +01:00
|
|
|
KvmVM::setupMemSlot(const KvmVM::MemSlot num, void *host_addr, Addr guest,
|
|
|
|
uint32_t flags)
|
2013-04-22 19:20:32 +02:00
|
|
|
{
|
2014-12-10 06:53:44 +01:00
|
|
|
MemorySlot &slot = memorySlots.at(num.num);
|
|
|
|
slot.active = true;
|
|
|
|
setUserMemoryRegion(num.num, host_addr, guest, slot.size, flags);
|
|
|
|
}
|
2013-04-22 19:20:32 +02:00
|
|
|
|
2014-12-10 06:53:44 +01:00
|
|
|
void
|
|
|
|
KvmVM::disableMemSlot(const KvmVM::MemSlot num)
|
|
|
|
{
|
|
|
|
MemorySlot &slot = memorySlots.at(num.num);
|
|
|
|
if (slot.active)
|
|
|
|
setUserMemoryRegion(num.num, NULL, 0, 0, 0);
|
|
|
|
slot.active = false;
|
|
|
|
}
|
|
|
|
|
|
|
|
void
|
|
|
|
KvmVM::freeMemSlot(const KvmVM::MemSlot num)
|
|
|
|
{
|
|
|
|
disableMemSlot(num.num);
|
|
|
|
MemorySlot &slot = memorySlots.at(num.num);
|
|
|
|
slot.size = 0;
|
2013-04-22 19:20:32 +02:00
|
|
|
}
|
|
|
|
|
|
|
|
void
|
|
|
|
KvmVM::setUserMemoryRegion(uint32_t slot,
|
|
|
|
void *host_addr, Addr guest_addr,
|
|
|
|
uint64_t len, uint32_t flags)
|
|
|
|
{
|
|
|
|
struct kvm_userspace_memory_region m;
|
|
|
|
|
|
|
|
memset(&m, 0, sizeof(m));
|
|
|
|
m.slot = slot;
|
|
|
|
m.flags = flags;
|
|
|
|
m.guest_phys_addr = (uint64_t)guest_addr;
|
|
|
|
m.memory_size = len;
|
|
|
|
m.userspace_addr = (__u64)host_addr;
|
|
|
|
|
|
|
|
if (ioctl(KVM_SET_USER_MEMORY_REGION, (void *)&m) == -1) {
|
|
|
|
panic("Failed to setup KVM memory region:\n"
|
|
|
|
"\tHost Address: 0x%p\n"
|
|
|
|
"\tGuest Address: 0x%llx\n",
|
|
|
|
"\tSize: %ll\n",
|
|
|
|
"\tFlags: 0x%x\n",
|
|
|
|
m.userspace_addr, m.guest_phys_addr,
|
|
|
|
m.memory_size, m.flags);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
void
|
|
|
|
KvmVM::coalesceMMIO(const AddrRange &range)
|
|
|
|
{
|
|
|
|
coalesceMMIO(range.start(), range.size());
|
|
|
|
}
|
|
|
|
|
|
|
|
void
|
|
|
|
KvmVM::coalesceMMIO(Addr start, int size)
|
|
|
|
{
|
|
|
|
struct kvm_coalesced_mmio_zone zone;
|
|
|
|
|
|
|
|
zone.addr = start;
|
|
|
|
zone.size = size;
|
|
|
|
zone.pad = 0;
|
|
|
|
|
|
|
|
DPRINTF(Kvm, "KVM: Registering coalesced MMIO region [0x%x, 0x%x]\n",
|
|
|
|
zone.addr, zone.addr + zone.size - 1);
|
|
|
|
if (ioctl(KVM_REGISTER_COALESCED_MMIO, (void *)&zone) == -1)
|
|
|
|
panic("KVM: Failed to register coalesced MMIO region (%i)\n",
|
|
|
|
errno);
|
|
|
|
}
|
|
|
|
|
|
|
|
void
|
|
|
|
KvmVM::setTSSAddress(Addr tss_address)
|
|
|
|
{
|
|
|
|
if (ioctl(KVM_SET_TSS_ADDR, (unsigned long)tss_address) == -1)
|
|
|
|
panic("KVM: Failed to set VM TSS address\n");
|
|
|
|
}
|
|
|
|
|
|
|
|
void
|
|
|
|
KvmVM::createIRQChip()
|
|
|
|
{
|
|
|
|
if (_hasKernelIRQChip)
|
|
|
|
panic("KvmVM::createIRQChip called twice.\n");
|
|
|
|
|
|
|
|
if (ioctl(KVM_CREATE_IRQCHIP) != -1) {
|
|
|
|
_hasKernelIRQChip = true;
|
|
|
|
} else {
|
|
|
|
warn("KVM: Failed to create in-kernel IRQ chip (errno: %i)\n",
|
|
|
|
errno);
|
|
|
|
_hasKernelIRQChip = false;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
void
|
|
|
|
KvmVM::setIRQLine(uint32_t irq, bool high)
|
|
|
|
{
|
|
|
|
struct kvm_irq_level kvm_level;
|
|
|
|
|
|
|
|
kvm_level.irq = irq;
|
|
|
|
kvm_level.level = high ? 1 : 0;
|
|
|
|
|
|
|
|
if (ioctl(KVM_IRQ_LINE, &kvm_level) == -1)
|
|
|
|
panic("KVM: Failed to set IRQ line level (errno: %i)\n",
|
|
|
|
errno);
|
|
|
|
}
|
|
|
|
|
2015-06-01 20:44:17 +02:00
|
|
|
int
|
|
|
|
KvmVM::createDevice(uint32_t type, uint32_t flags)
|
|
|
|
{
|
|
|
|
#if defined(KVM_CREATE_DEVICE)
|
|
|
|
struct kvm_create_device dev = { type, 0, flags };
|
|
|
|
|
|
|
|
if (ioctl(KVM_CREATE_DEVICE, &dev) == -1) {
|
|
|
|
panic("KVM: Failed to create device (errno: %i)\n",
|
|
|
|
errno);
|
|
|
|
}
|
|
|
|
|
|
|
|
return dev.fd;
|
|
|
|
#else
|
|
|
|
panic("Kernel headers don't support KVM_CREATE_DEVICE\n");
|
|
|
|
#endif
|
|
|
|
}
|
|
|
|
|
2013-04-22 19:20:32 +02:00
|
|
|
int
|
|
|
|
KvmVM::createVCPU(long vcpuID)
|
|
|
|
{
|
|
|
|
int fd;
|
|
|
|
|
|
|
|
fd = ioctl(KVM_CREATE_VCPU, vcpuID);
|
|
|
|
if (fd == -1)
|
|
|
|
panic("KVM: Failed to create virtual CPU");
|
|
|
|
|
|
|
|
return fd;
|
|
|
|
}
|
|
|
|
|
|
|
|
long
|
|
|
|
KvmVM::allocVCPUID()
|
|
|
|
{
|
|
|
|
return nextVCPUID++;
|
|
|
|
}
|
|
|
|
|
2015-06-01 20:44:19 +02:00
|
|
|
#if defined(__aarch64__)
|
|
|
|
void
|
|
|
|
KvmVM::kvmArmPreferredTarget(struct kvm_vcpu_init &target) const
|
|
|
|
{
|
|
|
|
if (ioctl(KVM_ARM_PREFERRED_TARGET, &target) == -1) {
|
|
|
|
panic("KVM: Failed to get ARM preferred CPU target (errno: %i)\n",
|
|
|
|
errno);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
#endif
|
|
|
|
|
2013-04-22 19:20:32 +02:00
|
|
|
int
|
|
|
|
KvmVM::ioctl(int request, long p1) const
|
|
|
|
{
|
|
|
|
assert(vmFD != -1);
|
|
|
|
|
|
|
|
return ::ioctl(vmFD, request, p1);
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
KvmVM *
|
|
|
|
KvmVMParams::create()
|
|
|
|
{
|
|
|
|
static bool created = false;
|
|
|
|
if (created)
|
|
|
|
warn_once("Use of multiple KvmVMs is currently untested!\n");
|
|
|
|
|
|
|
|
created = true;
|
|
|
|
|
|
|
|
return new KvmVM(this);
|
|
|
|
}
|