KVM Interrupt handling.

Functions
void	gem5::BaseKvmCPU::kvmNonMaskableInterrupt ()
	Send a non-maskable interrupt to the guest.
void	gem5::BaseKvmCPU::kvmInterrupt (const struct kvm_interrupt &interrupt)
	Send a normal interrupt to the guest.
void	gem5::KvmVM::createIRQChip ()
	Create an in-kernel interrupt controller.
void	gem5::KvmVM::setIRQLine (uint32_t irq, bool high)
	Set the status of an IRQ line using KVM_IRQ_LINE.
bool	gem5::KvmVM::hasKernelIRQChip () const
	Is in-kernel IRQ chip emulation enabled?
void	gem5::KvmVM::enableKernelIRQChip ()
	Tell the VM and VCPUs to use an in-kernel IRQ chip for interrupt delivery.

Detailed Description

These methods control interrupt delivery to the guest system.

Function Documentation

createIRQChip()

void gem5::KvmVM::createIRQChip

(

)

Create an in-kernel interrupt controller.

Note

This functionality depends on Kvm::capIRQChip().

Definition at line 510 of file vm.cc.

References gem5::KvmVM::_hasKernelIRQChip, gem5::KvmVM::ioctl(), panic, and warn.

enableKernelIRQChip()

void gem5::KvmVM::enableKernelIRQChip ( )

inline

Tell the VM and VCPUs to use an in-kernel IRQ chip for interrupt delivery.

Note

This is set automatically if the IRQ chip is created using the KvmVM::createIRQChip() API.

Definition at line 372 of file vm.hh.

References gem5::KvmVM::_hasKernelIRQChip.

Referenced by gem5::KvmKernelGic::KvmKernelGic().

hasKernelIRQChip()

bool gem5::KvmVM::hasKernelIRQChip ( ) const

inline

Is in-kernel IRQ chip emulation enabled?

Definition at line 363 of file vm.hh.

References gem5::KvmVM::_hasKernelIRQChip.

Referenced by gem5::BaseArmKvmCPU::kvmRun(), and gem5::BaseArmKvmCPU::startup().

kvmInterrupt()

void gem5::BaseKvmCPU::kvmInterrupt ( const struct kvm_interrupt & interrupt )

protected

Send a normal interrupt to the guest.

Note

Make sure that ready_for_interrupt_injection in kvm_run is set prior to calling this function. If not, an interrupt window must be requested by setting request_interrupt_window in kvm_run to 1 and restarting the guest.

Parameters

interrupt

Structure describing the interrupt to send

Definition at line 834 of file base.cc.

References gem5::BaseKvmCPU::ioctl(), gem5::BaseKvmCPU::StatGroup::numInterrupts, panic, and gem5::BaseKvmCPU::stats.

Referenced by gem5::X86KvmCPU::deliverInterrupts().

kvmNonMaskableInterrupt()

void gem5::BaseKvmCPU::kvmNonMaskableInterrupt ( )

protected

Send a non-maskable interrupt to the guest.

Note

The presence of this call depends on Kvm::capUserNMI().

Definition at line 826 of file base.cc.

References gem5::BaseKvmCPU::ioctl(), gem5::BaseKvmCPU::StatGroup::numInterrupts, panic, and gem5::BaseKvmCPU::stats.

Referenced by gem5::X86KvmCPU::deliverInterrupts().

setIRQLine()

void gem5::KvmVM::setIRQLine	(	uint32_t	irq,
		bool	high )

Set the status of an IRQ line using KVM_IRQ_LINE.

Note

This ioctl is usually only used if the interrupt controller is emulated by the kernel (i.e., after calling createIRQChip()). Some architectures (e.g., ARM) use it instead of BaseKvmCPU::kvmInterrupt().

Parameters

irq	Interrupt number
high	Line level (true for high, false for low)

Definition at line 525 of file vm.cc.

References gem5::KvmVM::ioctl(), gem5::ArmISA::irq, and panic.

Referenced by gem5::ArmKvmCPU::kvmRun(), gem5::BaseArmKvmCPU::kvmRun(), and gem5::KvmKernelGic::setIntState().