gem5::KvmKernelGic Class Reference

KVM in-kernel GIC abstraction. More...

#include <gic.hh>

Inheritance diagram for gem5::KvmKernelGic:

Public Member Functions
	KvmKernelGic (KvmVM &vm, uint32_t dev, unsigned it_lines)
	Instantiate a KVM in-kernel GIC model.
virtual	~KvmKernelGic ()
	KvmKernelGic (const KvmKernelGic &other)=delete
	KvmKernelGic (const KvmKernelGic &&other)=delete
KvmKernelGic &	operator= (const KvmKernelGic &&rhs)=delete
KvmKernelGic &	operator= (const KvmKernelGic &rhs)=delete
virtual void	init ()

In-kernel GIC API
KvmVM &	vm
	KVM VM in the parent system.
KvmDevice	kdev
	Kernel interface to the GIC.
void	setSPI (unsigned spi)
	Raise a shared peripheral interrupt.
void	clearSPI (unsigned spi)
	Clear a shared peripheral interrupt.
void	setPPI (unsigned vcpu, unsigned ppi)
	Raise a private peripheral interrupt.
void	clearPPI (unsigned vcpu, unsigned ppi)
	Clear a private peripheral interrupt.
void	setIntState (unsigned type, unsigned vcpu, unsigned irq, bool high)
	Update the kernel's VGIC interrupt state.

Detailed Description

KVM in-kernel GIC abstraction.

This class defines a high-level interface to the KVM in-kernel GIC model. It exposes an API that is similar to that of software-emulated GIC models in gem5.

Definition at line 61 of file gic.hh.

Constructor & Destructor Documentation

KvmKernelGic() [1/3]

gem5::KvmKernelGic::KvmKernelGic	(	KvmVM &	vm,
		uint32_t	dev,
		unsigned	it_lines )

Instantiate a KVM in-kernel GIC model.

This constructor instantiates an in-kernel GIC model and wires it up to the virtual memory system.

Parameters

vm	KVM VM representing this system
cpu_addr	GIC CPU interface base address
dist_addr	GIC distributor base address
it_lines	Number of interrupt lines to support

Definition at line 51 of file gic.cc.

References gem5::KvmVM::enableKernelIRQChip(), kdev, gem5::KvmDevice::setAttr(), and vm.

~KvmKernelGic()

gem5::KvmKernelGic::~KvmKernelGic ( )

virtual

Definition at line 62 of file gic.cc.

KvmKernelGic() [2/3]

gem5::KvmKernelGic::KvmKernelGic ( const KvmKernelGic & other )

delete

KvmKernelGic() [3/3]

gem5::KvmKernelGic::KvmKernelGic ( const KvmKernelGic && other )

delete

Member Function Documentation

clearPPI()

void gem5::KvmKernelGic::clearPPI	(	unsigned	vcpu,
		unsigned	ppi )

Clear a private peripheral interrupt.

Parameters

vcpu	KVM virtual CPU number @parma ppi PPI interrupt number

Definition at line 85 of file gic.cc.

References setIntState().

clearSPI()

void gem5::KvmKernelGic::clearSPI

(

unsigned

spi

)

Clear a shared peripheral interrupt.

Parameters

spi	SPI number

Definition at line 73 of file gic.cc.

References setIntState().

init()

virtual void gem5::KvmKernelGic::init ( )

inlinevirtual

Reimplemented in gem5::KvmKernelGicV3.

Definition at line 83 of file gic.hh.

operator=() [1/2]

KvmKernelGic & gem5::KvmKernelGic::operator= ( const KvmKernelGic && rhs )

delete

operator=() [2/2]

KvmKernelGic & gem5::KvmKernelGic::operator= ( const KvmKernelGic & rhs )

delete

setIntState()

void gem5::KvmKernelGic::setIntState ( unsigned type, unsigned vcpu, unsigned irq, bool high )

protected

Update the kernel's VGIC interrupt state.

Parameters

type	Interrupt type (KVM_ARM_IRQ_TYPE_PPI/KVM_ARM_IRQ_TYPE_SPI)
vcpu	CPU id within KVM (ignored for SPIs)
irq	Interrupt number
high	True to signal an interrupt, false to clear it.

Definition at line 91 of file gic.cc.

References gem5::Kvm::capIRQLineLayout2(), gem5::ArmISA::irq, gem5::KvmVM::kvm, panic_if, gem5::KvmVM::setIRQLine(), gem5::X86ISA::type, and vm.

Referenced by clearPPI(), clearSPI(), setPPI(), and setSPI().

setPPI()

void gem5::KvmKernelGic::setPPI	(	unsigned	vcpu,
		unsigned	ppi )

Raise a private peripheral interrupt.

Parameters

vcpu	KVM virtual CPU number @parma ppi PPI interrupt number

Definition at line 79 of file gic.cc.

References setIntState().

setSPI()

void gem5::KvmKernelGic::setSPI

(

unsigned

spi

)

Raise a shared peripheral interrupt.

Parameters

spi	SPI number

Definition at line 67 of file gic.cc.

References setIntState().

Member Data Documentation

kdev

KvmDevice gem5::KvmKernelGic::kdev

protected

Kernel interface to the GIC.

Definition at line 137 of file gic.hh.

Referenced by gem5::KvmKernelGicV2::getGicReg(), gem5::KvmKernelGicV3::getGicReg(), gem5::KvmKernelGicV3::init(), KvmKernelGic(), gem5::KvmKernelGicV2::KvmKernelGicV2(), gem5::KvmKernelGicV3::KvmKernelGicV3(), gem5::KvmKernelGicV2::setGicReg(), and gem5::KvmKernelGicV3::setGicReg().

vm

KvmVM& gem5::KvmKernelGic::vm

protected

KVM VM in the parent system.

Definition at line 134 of file gic.hh.

Referenced by KvmKernelGic(), gem5::KvmKernelGicV2::readCpu(), gem5::KvmKernelGicV2::readDistributor(), setIntState(), gem5::KvmKernelGicV2::writeCpu(), and gem5::KvmKernelGicV2::writeDistributor().

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

• arch/arm/kvm/gic.hh
• arch/arm/kvm/gic.cc