#include <base_cpu.hh>

Inheritance diagram for BaseArmKvmCPU:

Public Member Functions
	BaseArmKvmCPU (BaseArmKvmCPUParams *params)

virtual	~BaseArmKvmCPU ()

void	startup () override

Public Member Functions inherited from BaseKvmCPU
	BaseKvmCPU (BaseKvmCPUParams *params)

virtual	~BaseKvmCPU ()

void	init () override

void	startup () override

void	regStats () override

void	serializeThread (CheckpointOut &cp, ThreadID tid) const override

void	unserializeThread (CheckpointIn &cp, ThreadID tid) override

DrainState	drain () override

void	drainResume () override

void	notifyFork () override

void	switchOut () override

void	takeOverFrom (BaseCPU *cpu) override

void	verifyMemoryMode () const override

MasterPort &	getDataPort () override

MasterPort &	getInstPort () override

void	wakeup (ThreadID tid=0) override

void	activateContext (ThreadID thread_num) override

void	suspendContext (ThreadID thread_num) override

void	deallocateContext (ThreadID thread_num)

void	haltContext (ThreadID thread_num) override

long	getVCpuID () const

ThreadContext *	getContext (int tn) override

Counter	totalInsts () const override

Counter	totalOps () const override

void	finishMMIOPending ()
	Callback from KvmCPUPort to transition the CPU out of RunningMMIOPending when all timing requests have completed. More...

virtual void	dump () const
	Dump the internal state to the terminal. More...

void	kick () const
	Force an exit from KVM. More...

Protected Types
typedef std::vector< uint64_t >	RegIndexVector

Protected Types inherited from BaseKvmCPU
enum	Status { Idle, Running, RunningService, RunningMMIOPending, RunningServiceCompletion }

Protected Member Functions
Tick	kvmRun (Tick ticks) override
	Request KVM to run the guest for a given number of ticks. More...

const RegIndexVector &	getRegList () const
	Get a list of registers supported by getOneReg() and setOneReg(). More...

void	kvmArmVCpuInit (const struct kvm_vcpu_init &init)
	Tell the kernel to initialize this CPU. More...

Protected Member Functions inherited from BaseKvmCPU
void	tick ()
	Execute the CPU until the next event in the main event queue or until the guest needs service from gem5. More...

virtual uint64_t	getHostCycles () const
	Get the value of the hardware cycle counter in the guest. More...

virtual Tick	kvmRunDrain ()
	Request the CPU to run until draining completes. More...

struct kvm_run *	getKvmRunState ()
	Get a pointer to the kvm_run structure containing all the input and output parameters from kvmRun(). More...

uint8_t *	getGuestData (uint64_t offset) const
	Retrieve a pointer to guest data stored at the end of the kvm_run structure. More...

void	kvmNonMaskableInterrupt ()
	Send a non-maskable interrupt to the guest. More...

void	kvmInterrupt (const struct kvm_interrupt &interrupt)
	Send a normal interrupt to the guest. More...

std::string	getAndFormatOneReg (uint64_t id) const
	Get and format one register for printout. More...

virtual bool	archIsDrained () const
	Is the architecture specific code in a state that prevents draining? More...

Tick	doMMIOAccess (Addr paddr, void *data, int size, bool write)
	Inject a memory mapped IO request into gem5. More...

int	ioctl (int request, long p1) const
	vCPU ioctl interface. More...

int	ioctl (int request, void *p1) const

int	ioctl (int request) const

void	getRegisters (struct kvm_regs &regs) const
	Get/Set the register state of the guest vCPU. More...

void	setRegisters (const struct kvm_regs &regs)

void	getSpecialRegisters (struct kvm_sregs &regs) const

void	setSpecialRegisters (const struct kvm_sregs &regs)

void	getFPUState (struct kvm_fpu &state) const
	Get/Set the guest FPU/vector state. More...

void	setFPUState (const struct kvm_fpu &state)

void	setOneReg (uint64_t id, const void *addr)
	Get/Set single register using the KVM_(SET\|GET)_ONE_REG API. More...

void	setOneReg (uint64_t id, uint64_t value)

void	setOneReg (uint64_t id, uint32_t value)

void	getOneReg (uint64_t id, void *addr) const

uint64_t	getOneRegU64 (uint64_t id) const

uint32_t	getOneRegU32 (uint64_t id) const

virtual void	updateKvmState ()=0
	Update the KVM state from the current thread context. More...

virtual void	updateThreadContext ()=0
	Update the current thread context with the KVM state. More...

void	syncThreadContext ()
	Update a thread context if the KVM state is dirty with respect to the cached thread context. More...

void	syncKvmState ()
	Update the KVM if the thread context is dirty. More...

virtual Tick	handleKvmExit ()
	Main kvmRun exit handler, calls the relevant handleKvmExit* depending on exit type. More...

virtual Tick	handleKvmExitIO ()
	The guest performed a legacy IO request (out/inp on x86) More...

virtual Tick	handleKvmExitHypercall ()
	The guest requested a monitor service using a hypercall. More...

virtual Tick	handleKvmExitIRQWindowOpen ()
	The guest exited because an interrupt window was requested. More...

virtual Tick	handleKvmExitUnknown ()
	An unknown architecture dependent error occurred when starting the vCPU. More...

virtual Tick	handleKvmExitException ()
	An unhandled virtualization exception occured. More...

virtual Tick	handleKvmExitFailEntry ()
	KVM failed to start the virtualized CPU. More...

void	setSignalMask (const sigset_t *mask)
	Set the signal mask used in kvmRun() More...

Protected Attributes
bool	irqAsserted
	Cached state of the IRQ line. More...

bool	fiqAsserted
	Cached state of the FIQ line. More...

Protected Attributes inherited from BaseKvmCPU
Status	_status
	CPU run state. More...

KVMCpuPort	dataPort
	Port for data requests. More...

KVMCpuPort	instPort
	Unused dummy port for the instruction interface. More...

const bool	alwaysSyncTC
	Be conservative and always synchronize the thread context on KVM entry/exit. More...

bool	threadContextDirty
	Is the gem5 context dirty? Set to true to force an update of the KVM vCPU state upon the next call to kvmRun(). More...

bool	kvmStateDirty
	Is the KVM state dirty? Set to true to force an update of the KVM vCPU state upon the next call to kvmRun(). More...

const long	vcpuID
	KVM internal ID of the vCPU. More...

pthread_t	vcpuThread
	ID of the vCPU thread. More...

Private Member Functions
std::unique_ptr< struct kvm_reg_list >	tryGetRegList (uint64_t nelem) const

bool	getRegList (struct kvm_reg_list &regs) const
	Get a list of registers supported by getOneReg() and setOneReg(). More...

Private Attributes
RegIndexVector	_regIndexList
	Cached copy of the list of registers supported by KVM. More...

Additional Inherited Members
Static Public Member Functions inherited from BaseCPU
static int	numSimulatedInsts ()

static int	numSimulatedOps ()

static void	wakeup (ThreadID tid)

Public Attributes inherited from BaseKvmCPU
SimpleThread *	thread
	A cached copy of a thread's state in the form of a SimpleThread object. More...

ThreadContext *	tc
	ThreadContext object, provides an interface for external objects to modify this thread's state. More...

KvmVM &	vm

Counter	ctrInsts
	Number of instructions executed by the CPU. More...

Stats::Scalar	numInsts

Stats::Scalar	numVMExits

Stats::Scalar	numVMHalfEntries

Stats::Scalar	numExitSignal

Stats::Scalar	numMMIO

Stats::Scalar	numCoalescedMMIO

Stats::Scalar	numIO

Stats::Scalar	numHalt

Stats::Scalar	numInterrupts

Stats::Scalar	numHypercalls

Detailed Description

Definition at line 49 of file base_cpu.hh.

Member Typedef Documentation

typedef std::vector<uint64_t> BaseArmKvmCPU::RegIndexVector

protected

Definition at line 67 of file base_cpu.hh.

Constructor & Destructor Documentation

BaseArmKvmCPU::BaseArmKvmCPU ( BaseArmKvmCPUParams * params )

Definition at line 59 of file base_cpu.cc.

BaseArmKvmCPU::~BaseArmKvmCPU ( )

virtual

Definition at line 65 of file base_cpu.cc.

Member Function Documentation

const BaseArmKvmCPU::RegIndexVector & BaseArmKvmCPU::getRegList ( ) const

protected

Get a list of registers supported by getOneReg() and setOneReg().

This method returns a list of all registers supported by kvm. The actual list is only requested the first time this method is called. Subsequent calls return a cached copy of the register list.

Returns: Vector of register indexes.

Definition at line 109 of file base_cpu.cc.

References _regIndexList, panic, and X86ISA::size().

Referenced by ArmV8KvmCPU::dump(), and ArmV8KvmCPU::getSysRegMap().

bool BaseArmKvmCPU::getRegList ( struct kvm_reg_list & regs ) const

private

Get a list of registers supported by getOneReg() and setOneReg().

Returns: False if the number of elements allocated in the list is too small to hold the complete register list (the required size is written to regs.n in this case). True on success.

Definition at line 144 of file base_cpu.cc.

References BaseKvmCPU::ioctl(), and panic.

void BaseArmKvmCPU::kvmArmVCpuInit ( const struct kvm_vcpu_init & init )

protected

Tell the kernel to initialize this CPU.

The kernel needs to know what type of the CPU that we want to emulate. The specified CPU type has to be compatible with the host CPU. In practice, we usually call KvmVM::kvmArmPreferredTarget() to discover the host CPU.

Parameters

target CPU type to emulate

Definition at line 137 of file base_cpu.cc.

References BaseKvmCPU::ioctl(), and panic.

Referenced by startup().

Tick BaseArmKvmCPU::kvmRun ( Tick ticks )

overrideprotectedvirtual

Request KVM to run the guest for a given number of ticks.

The method returns the approximate number of ticks executed.

Note: The returned number of ticks can be both larger or smaller than the requested number of ticks. A smaller number can, for example, occur when the guest executes MMIO. A larger number is typically due to performance counter inaccuracies.; This method is virtual in order to allow implementations to check for architecture specific events (e.g., interrupts) before entering the VM.; It is the response of the caller (normally tick()) to make sure that the KVM state is synchronized and that the TC is invalidated after entering KVM.; This method does not normally cause any state transitions. However, if it may suspend the CPU by suspending the thread, which leads to a transition to the Idle state. In such a case, kvm must not be entered.

Parameters

ticks Number of ticks to execute, set to 0 to exit immediately after finishing pending operations.

Returns: Number of ticks executed (see note)

Reimplemented from BaseKvmCPU.

Definition at line 89 of file base_cpu.cc.

References DPRINTF, fiqAsserted, ArmISA::INT_FIQ, ArmISA::INT_IRQ, INTERRUPT_VCPU_FIQ, INTERRUPT_VCPU_IRQ, irqAsserted, BaseKvmCPU::kvmRun(), KvmVM::setIRQLine(), BaseKvmCPU::vcpuID, and BaseKvmCPU::vm.

void BaseArmKvmCPU::startup ( )

override

Definition at line 70 of file base_cpu.cc.

References kvmArmVCpuInit(), BaseKvmCPU::startup(), ArmISA::system, and BaseKvmCPU::vm.

Referenced by ArmV8KvmCPU::startup().

std::unique_ptr<struct kvm_reg_list> BaseArmKvmCPU::tryGetRegList ( uint64_t nelem ) const

private

Member Data Documentation

RegIndexVector BaseArmKvmCPU::_regIndexList

mutableprivate

Cached copy of the list of registers supported by KVM.

Definition at line 108 of file base_cpu.hh.

Referenced by getRegList().

bool BaseArmKvmCPU::fiqAsserted

protected

Cached state of the FIQ line.

Definition at line 64 of file base_cpu.hh.

Referenced by kvmRun().

bool BaseArmKvmCPU::irqAsserted

protected

Cached state of the IRQ line.

Definition at line 62 of file base_cpu.hh.

Referenced by kvmRun().

The documentation for this class was generated from the following files:

arch/arm/kvm/base_cpu.hh
arch/arm/kvm/base_cpu.cc

Public Member Functions

Protected Types

Protected Member Functions

Protected Attributes

Private Member Functions

Private Attributes

Additional Inherited Members

Detailed Description

Member Typedef Documentation

Constructor & Destructor Documentation

Member Function Documentation

Member Data Documentation