110860Sandreas.sandberg@arm.com/* 212111Sandreas.sandberg@arm.com * Copyright (c) 2012, 2015, 2017 ARM Limited 310860Sandreas.sandberg@arm.com * All rights reserved 410860Sandreas.sandberg@arm.com * 510860Sandreas.sandberg@arm.com * The license below extends only to copyright in the software and shall 610860Sandreas.sandberg@arm.com * not be construed as granting a license to any other intellectual 710860Sandreas.sandberg@arm.com * property including but not limited to intellectual property relating 810860Sandreas.sandberg@arm.com * to a hardware implementation of the functionality of the software 910860Sandreas.sandberg@arm.com * licensed hereunder. You may use the software subject to the license 1010860Sandreas.sandberg@arm.com * terms below provided that you ensure that this notice is replicated 1110860Sandreas.sandberg@arm.com * unmodified and in its entirety in all distributions of the software, 1210860Sandreas.sandberg@arm.com * modified or unmodified, in source code or in binary form. 1310860Sandreas.sandberg@arm.com * 1410860Sandreas.sandberg@arm.com * Redistribution and use in source and binary forms, with or without 1510860Sandreas.sandberg@arm.com * modification, are permitted provided that the following conditions are 1610860Sandreas.sandberg@arm.com * met: redistributions of source code must retain the above copyright 1710860Sandreas.sandberg@arm.com * notice, this list of conditions and the following disclaimer; 1810860Sandreas.sandberg@arm.com * redistributions in binary form must reproduce the above copyright 1910860Sandreas.sandberg@arm.com * notice, this list of conditions and the following disclaimer in the 2010860Sandreas.sandberg@arm.com * documentation and/or other materials provided with the distribution; 2110860Sandreas.sandberg@arm.com * neither the name of the copyright holders nor the names of its 2210860Sandreas.sandberg@arm.com * contributors may be used to endorse or promote products derived from 2310860Sandreas.sandberg@arm.com * this software without specific prior written permission. 2410860Sandreas.sandberg@arm.com * 2510860Sandreas.sandberg@arm.com * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 2610860Sandreas.sandberg@arm.com * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 2710860Sandreas.sandberg@arm.com * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 2810860Sandreas.sandberg@arm.com * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 2910860Sandreas.sandberg@arm.com * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 3010860Sandreas.sandberg@arm.com * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 3110860Sandreas.sandberg@arm.com * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 3210860Sandreas.sandberg@arm.com * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 3310860Sandreas.sandberg@arm.com * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 3410860Sandreas.sandberg@arm.com * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 3510860Sandreas.sandberg@arm.com * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 3610860Sandreas.sandberg@arm.com * 3710860Sandreas.sandberg@arm.com * Authors: Andreas Sandberg 3810860Sandreas.sandberg@arm.com */ 3910860Sandreas.sandberg@arm.com 4010860Sandreas.sandberg@arm.com#include "arch/arm/kvm/base_cpu.hh" 4110860Sandreas.sandberg@arm.com 4210860Sandreas.sandberg@arm.com#include <linux/kvm.h> 4310860Sandreas.sandberg@arm.com 4410860Sandreas.sandberg@arm.com#include "debug/KvmInt.hh" 4510860Sandreas.sandberg@arm.com#include "params/BaseArmKvmCPU.hh" 4610860Sandreas.sandberg@arm.com 4710860Sandreas.sandberg@arm.com#define INTERRUPT_ID(type, vcpu, irq) ( \ 4810860Sandreas.sandberg@arm.com ((type) << KVM_ARM_IRQ_TYPE_SHIFT) | \ 4910860Sandreas.sandberg@arm.com ((vcpu) << KVM_ARM_IRQ_VCPU_SHIFT) | \ 5010860Sandreas.sandberg@arm.com ((irq) << KVM_ARM_IRQ_NUM_SHIFT)) 5110860Sandreas.sandberg@arm.com 5210860Sandreas.sandberg@arm.com#define INTERRUPT_VCPU_IRQ(vcpu) \ 5310860Sandreas.sandberg@arm.com INTERRUPT_ID(KVM_ARM_IRQ_TYPE_CPU, vcpu, KVM_ARM_IRQ_CPU_IRQ) 5410860Sandreas.sandberg@arm.com 5510860Sandreas.sandberg@arm.com#define INTERRUPT_VCPU_FIQ(vcpu) \ 5610860Sandreas.sandberg@arm.com INTERRUPT_ID(KVM_ARM_IRQ_TYPE_CPU, vcpu, KVM_ARM_IRQ_CPU_FIQ) 5710860Sandreas.sandberg@arm.com 5810860Sandreas.sandberg@arm.com 5910860Sandreas.sandberg@arm.comBaseArmKvmCPU::BaseArmKvmCPU(BaseArmKvmCPUParams *params) 6010860Sandreas.sandberg@arm.com : BaseKvmCPU(params), 6110860Sandreas.sandberg@arm.com irqAsserted(false), fiqAsserted(false) 6210860Sandreas.sandberg@arm.com{ 6310860Sandreas.sandberg@arm.com} 6410860Sandreas.sandberg@arm.com 6510860Sandreas.sandberg@arm.comBaseArmKvmCPU::~BaseArmKvmCPU() 6610860Sandreas.sandberg@arm.com{ 6710860Sandreas.sandberg@arm.com} 6810860Sandreas.sandberg@arm.com 6910860Sandreas.sandberg@arm.comvoid 7010860Sandreas.sandberg@arm.comBaseArmKvmCPU::startup() 7110860Sandreas.sandberg@arm.com{ 7210860Sandreas.sandberg@arm.com BaseKvmCPU::startup(); 7310860Sandreas.sandberg@arm.com 7410860Sandreas.sandberg@arm.com /* TODO: This needs to be moved when we start to support VMs with 7510860Sandreas.sandberg@arm.com * multiple threads since kvmArmVCpuInit requires that all CPUs in 7610860Sandreas.sandberg@arm.com * the VM have been created. 7710860Sandreas.sandberg@arm.com */ 7810860Sandreas.sandberg@arm.com struct kvm_vcpu_init target_config; 7910860Sandreas.sandberg@arm.com memset(&target_config, 0, sizeof(target_config)); 8010860Sandreas.sandberg@arm.com 8110860Sandreas.sandberg@arm.com vm.kvmArmPreferredTarget(target_config); 8211891Srjthakur@google.com if (!((ArmSystem *)system)->highestELIs64()) { 8311891Srjthakur@google.com target_config.features[0] |= (1 << KVM_ARM_VCPU_EL1_32BIT); 8411891Srjthakur@google.com } 8510860Sandreas.sandberg@arm.com kvmArmVCpuInit(target_config); 8610860Sandreas.sandberg@arm.com} 8710860Sandreas.sandberg@arm.com 8810860Sandreas.sandberg@arm.comTick 8910860Sandreas.sandberg@arm.comBaseArmKvmCPU::kvmRun(Tick ticks) 9010860Sandreas.sandberg@arm.com{ 9112111Sandreas.sandberg@arm.com const bool simFIQ(interrupts[0]->checkRaw(INT_FIQ)); 9212111Sandreas.sandberg@arm.com const bool simIRQ(interrupts[0]->checkRaw(INT_IRQ)); 9310860Sandreas.sandberg@arm.com 9412111Sandreas.sandberg@arm.com if (!vm.hasKernelIRQChip()) { 9512111Sandreas.sandberg@arm.com if (fiqAsserted != simFIQ) { 9612111Sandreas.sandberg@arm.com DPRINTF(KvmInt, "KVM: Update FIQ state: %i\n", simFIQ); 9712111Sandreas.sandberg@arm.com vm.setIRQLine(INTERRUPT_VCPU_FIQ(vcpuID), simFIQ); 9812111Sandreas.sandberg@arm.com } 9912111Sandreas.sandberg@arm.com if (irqAsserted != simIRQ) { 10012111Sandreas.sandberg@arm.com DPRINTF(KvmInt, "KVM: Update IRQ state: %i\n", simIRQ); 10112111Sandreas.sandberg@arm.com vm.setIRQLine(INTERRUPT_VCPU_IRQ(vcpuID), simIRQ); 10212111Sandreas.sandberg@arm.com } 10312111Sandreas.sandberg@arm.com } else { 10412111Sandreas.sandberg@arm.com warn_if(simFIQ && !fiqAsserted, 10512111Sandreas.sandberg@arm.com "FIQ raised by the simulated interrupt controller " \ 10612111Sandreas.sandberg@arm.com "despite in-kernel GIC emulation. This is probably a bug."); 10712111Sandreas.sandberg@arm.com 10812111Sandreas.sandberg@arm.com warn_if(simIRQ && !irqAsserted, 10912111Sandreas.sandberg@arm.com "IRQ raised by the simulated interrupt controller " \ 11012111Sandreas.sandberg@arm.com "despite in-kernel GIC emulation. This is probably a bug."); 11110860Sandreas.sandberg@arm.com } 11212111Sandreas.sandberg@arm.com 11312111Sandreas.sandberg@arm.com irqAsserted = simIRQ; 11412111Sandreas.sandberg@arm.com fiqAsserted = simFIQ; 11510860Sandreas.sandberg@arm.com 11610860Sandreas.sandberg@arm.com return BaseKvmCPU::kvmRun(ticks); 11710860Sandreas.sandberg@arm.com} 11810860Sandreas.sandberg@arm.com 11910860Sandreas.sandberg@arm.comconst BaseArmKvmCPU::RegIndexVector & 12010860Sandreas.sandberg@arm.comBaseArmKvmCPU::getRegList() const 12110860Sandreas.sandberg@arm.com{ 12210860Sandreas.sandberg@arm.com // Do we need to request a list of registers from the kernel? 12310860Sandreas.sandberg@arm.com if (_regIndexList.size() == 0) { 12410860Sandreas.sandberg@arm.com // Start by probing for the size of the list. We do this 12510860Sandreas.sandberg@arm.com // calling the ioctl with a struct size of 0. The kernel will 12610860Sandreas.sandberg@arm.com // return the number of elements required to hold the list. 12710860Sandreas.sandberg@arm.com kvm_reg_list regs_probe; 12810860Sandreas.sandberg@arm.com regs_probe.n = 0; 12910860Sandreas.sandberg@arm.com getRegList(regs_probe); 13010860Sandreas.sandberg@arm.com 13110860Sandreas.sandberg@arm.com // Request the actual register list now that we know how many 13210860Sandreas.sandberg@arm.com // register we need to allocate space for. 13310860Sandreas.sandberg@arm.com std::unique_ptr<struct kvm_reg_list> regs; 13410860Sandreas.sandberg@arm.com const size_t size(sizeof(struct kvm_reg_list) + 13510860Sandreas.sandberg@arm.com regs_probe.n * sizeof(uint64_t)); 13610860Sandreas.sandberg@arm.com regs.reset((struct kvm_reg_list *)operator new(size)); 13710860Sandreas.sandberg@arm.com regs->n = regs_probe.n; 13810860Sandreas.sandberg@arm.com if (!getRegList(*regs)) 13910860Sandreas.sandberg@arm.com panic("Failed to determine register list size.\n"); 14010860Sandreas.sandberg@arm.com 14110860Sandreas.sandberg@arm.com _regIndexList.assign(regs->reg, regs->reg + regs->n); 14210860Sandreas.sandberg@arm.com } 14310860Sandreas.sandberg@arm.com 14410860Sandreas.sandberg@arm.com return _regIndexList; 14510860Sandreas.sandberg@arm.com} 14610860Sandreas.sandberg@arm.com 14710860Sandreas.sandberg@arm.comvoid 14810860Sandreas.sandberg@arm.comBaseArmKvmCPU::kvmArmVCpuInit(const struct kvm_vcpu_init &init) 14910860Sandreas.sandberg@arm.com{ 15010860Sandreas.sandberg@arm.com if (ioctl(KVM_ARM_VCPU_INIT, (void *)&init) == -1) 15110860Sandreas.sandberg@arm.com panic("KVM: Failed to initialize vCPU\n"); 15210860Sandreas.sandberg@arm.com} 15310860Sandreas.sandberg@arm.com 15410860Sandreas.sandberg@arm.combool 15510860Sandreas.sandberg@arm.comBaseArmKvmCPU::getRegList(struct kvm_reg_list ®s) const 15610860Sandreas.sandberg@arm.com{ 15710860Sandreas.sandberg@arm.com if (ioctl(KVM_GET_REG_LIST, (void *)®s) == -1) { 15810860Sandreas.sandberg@arm.com if (errno == E2BIG) { 15910860Sandreas.sandberg@arm.com return false; 16010860Sandreas.sandberg@arm.com } else { 16110860Sandreas.sandberg@arm.com panic("KVM: Failed to get vCPU register list (errno: %i)\n", 16210860Sandreas.sandberg@arm.com errno); 16310860Sandreas.sandberg@arm.com } 16410860Sandreas.sandberg@arm.com } else { 16510860Sandreas.sandberg@arm.com return true; 16610860Sandreas.sandberg@arm.com } 16710860Sandreas.sandberg@arm.com} 168