KvmDevice Class Reference

KVM device wrapper. More...

#include <device.hh>

Public Member Functions
	KvmDevice (int fd)
virtual	~KvmDevice ()
template<typename T >
T	getAttr (uint32_t group, uint64_t attr) const
	Get the value of an attribute. More...
template<typename T >
void	setAttr (uint32_t group, uint64_t attr, const T &data) const
	Get the value of an attribute. More...
void	getAttrPtr (uint32_t group, uint64_t attr, void *data) const
void	setAttrPtr (uint32_t group, uint64_t attr, const void *data) const
bool	hasAttr (uint32_t group, uint64_t attr) const
	Check if a device attribute is valid. More...

Protected Member Functions
int	ioctl (int request, long p1) const
int	ioctl (int request, void *p1) const
int	ioctl (int request) const

Private Attributes
int	fd

Detailed Description

KVM device wrapper.

This is a wrapper around a device emulated by KVM. Such devices can be created using KvmVM::createDevice() API. They are typically used for in-kernel interrupt controllers and similar devices.

Each device has a device-specific set of attributes which are mapped into groups. The available attributes are described in the device's documentation in the kernel source tree (Documentation/virtual/kvm/devices/). Each attribute can be accessed with the getAttr() and setAttr() access methods. The presence of an attribute can be queried using the hasAttr() method.

Definition at line 57 of file device.hh.

Constructor & Destructor Documentation

KvmDevice()

KvmDevice::KvmDevice

(

int

fd

)

Definition at line 49 of file device.cc.

~KvmDevice()

KvmDevice::~KvmDevice ( )

virtual

Definition at line 54 of file device.cc.

References fd.

Member Function Documentation

getAttr()

template<typename T >

T KvmDevice::getAttr ( uint32_t  group, uint64_t  attr  ) const

inline

Get the value of an attribute.

See KVM's documentation, and specifically the device-specific documentation, for available attributes and attribute groups.

Parameters

group	Attribute group
attr	Attribute ID within group

Returns

Attribute value

Definition at line 75 of file device.hh.

References ArmISA::attr, data, and getAttrPtr().

getAttrPtr()

void KvmDevice::getAttrPtr	(	uint32_t	group,
		uint64_t	attr,
		void *	data
	)		const

Definition at line 60 of file device.cc.

References ArmISA::attr, data, ioctl(), and panic.

Referenced by getAttr(), and KvmKernelGicV2::getGicReg().

hasAttr()

bool KvmDevice::hasAttr	(	uint32_t	group,
		uint64_t	attr
	)		const

Check if a device attribute is valid.

See KVM's documentation, and specifically the device-specific documentation, for available attributes and attribute groups.

Parameters

group	Attribute group
attr	Attribute ID within group

Returns

true if attribute is valid, false otherwise.

Definition at line 100 of file device.cc.

References ArmISA::attr, ioctl(), and panic.

ioctl() [1/3]

int KvmDevice::ioctl ( int  request ) const

inlineprotected

Definition at line 116 of file device.hh.

References ioctl(), and X86ISA::L.

ioctl() [2/3]

int KvmDevice::ioctl ( int  request, long  p1  ) const

protected

Definition at line 117 of file device.cc.

References fd.

Referenced by getAttrPtr(), hasAttr(), ioctl(), and setAttrPtr().

ioctl() [3/3]

int KvmDevice::ioctl ( int  request, void *  p1  ) const

inlineprotected

Definition at line 113 of file device.hh.

References ioctl().

setAttr()

template<typename T >

void KvmDevice::setAttr ( uint32_t  group, uint64_t  attr, const T &  data  ) const

inline

Get the value of an attribute.

See KVM's documentation, and specifically the device-specific documentation, for available attributes and attribute groups.

Parameters

group	Attribute group
attr	Attribute ID within group

Returns

Attribute value

Definition at line 92 of file device.hh.

References ArmISA::attr, data, and setAttrPtr().

Referenced by KvmKernelGicV2::KvmKernelGicV2().

setAttrPtr()

void KvmDevice::setAttrPtr	(	uint32_t	group,
		uint64_t	attr,
		const void *	data
	)		const

Definition at line 80 of file device.cc.

References ArmISA::attr, data, ioctl(), and panic.

Referenced by setAttr(), and KvmKernelGicV2::setGicReg().

Member Data Documentation

fd

int KvmDevice::fd

private

Definition at line 121 of file device.hh.

Referenced by ioctl(), and ~KvmDevice().

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

• cpu/kvm/device.hh
• cpu/kvm/device.cc