x86_cpu.hh

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/*
 * Copyright (c) 2013 Andreas Sandberg
 * All rights reserved
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met: redistributions of source code must retain the above copyright
 * notice, this list of conditions and the following disclaimer;
 * redistributions in binary form must reproduce the above copyright
 * notice, this list of conditions and the following disclaimer in the
 * documentation and/or other materials provided with the distribution;
 * neither the name of the copyright holders nor the names of its
 * contributors may be used to endorse or promote products derived from
 * this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#ifndef __CPU_KVM_X86_CPU_HH__
#define __CPU_KVM_X86_CPU_HH__

#include "cpu/kvm/base.hh"
#include "cpu/kvm/vm.hh"
#include "params/X86KvmCPU.hh"

class X86KvmCPU : public BaseKvmCPU
{
  public:
    X86KvmCPU(X86KvmCPUParams *params);
    virtual ~X86KvmCPU();

    void startup() override;

    void dump() const override;
    void dumpFpuRegs() const;
    void dumpIntRegs() const;
    void dumpSpecRegs() const;
    void dumpDebugRegs() const;
    void dumpXCRs() const;
    void dumpXSave() const;
    void dumpVCpuEvents() const;
    void dumpMSRs() const;
  protected:
    typedef std::vector<struct kvm_msr_entry> KvmMSRVector;

    Tick kvmRun(Tick ticks) override;

    Tick kvmRunDrain() override;

    Tick kvmRunWrapper(Tick ticks);

    uint64_t getHostCycles() const override;

    void setCPUID(const struct kvm_cpuid2 &cpuid);
    void setCPUID(const Kvm::CPUIDVector &cpuid);
    void setMSRs(const struct kvm_msrs &msrs);
    void setMSRs(const KvmMSRVector &msrs);
    void getMSRs(struct kvm_msrs &msrs) const;
    void setMSR(uint32_t index, uint64_t value);
    uint64_t getMSR(uint32_t index) const;
    const Kvm::MSRIndexVector &getMsrIntersection() const;

    void getDebugRegisters(struct kvm_debugregs &regs) const;
    void setDebugRegisters(const struct kvm_debugregs &regs);
    void getXCRs(struct kvm_xcrs &regs) const;
    void setXCRs(const struct kvm_xcrs &regs);
    void getXSave(struct kvm_xsave &xsave) const;
    void setXSave(const struct kvm_xsave &xsave);
    void getVCpuEvents(struct kvm_vcpu_events &events) const;
    void setVCpuEvents(const struct kvm_vcpu_events &events);
    void updateKvmState() override;
    void updateThreadContext() override;

    void deliverInterrupts();

    Tick handleKvmExitIO() override;

    Tick handleKvmExitIRQWindowOpen() override;

    bool archIsDrained() const override;

  private:
    void updateKvmStateRegs();
    void updateKvmStateSRegs();
    void updateKvmStateFPU();
    void updateKvmStateFPULegacy();
    void updateKvmStateFPUXSave();
    void updateKvmStateMSRs();
    void updateThreadContextRegs(const struct kvm_regs &regs,
                                 const struct kvm_sregs &sregs);
    void updateThreadContextSRegs(const struct kvm_sregs &sregs);
    void updateThreadContextFPU(const struct kvm_fpu &fpu);
    void updateThreadContextXSave(const struct kvm_xsave &kxsave);
    void updateThreadContextMSRs();
    void updateCPUID();

    void handleIOMiscReg32(int miscreg);

    mutable Kvm::MSRIndexVector cachedMsrIntersection;

    bool haveDebugRegs;
    bool haveXSave;
    bool useXSave;
    bool haveXCRs;
};

#endif