VirtIO console. More...

#include <console.hh>

Inheritance diagram for gem5::VirtIOConsole:

Classes
struct	Config
	Console configuration structure. More...

class	TermRecvQueue
	Virtqueue for data going from the host to the guest. More...

class	TermTransQueue
	Virtqueue for data going from the guest to the host. More...

Public Types
typedef VirtIOConsoleParams	Params

Public Types inherited from gem5::VirtIODeviceBase
typedef uint16_t	QueueID

typedef uint32_t	FeatureBits

typedef uint16_t	VirtAddress
	This is a VirtQueue address as exposed through the low-level interface. The address needs to be multiplied by the page size (seems to be hardcoded to 4096 in the spec) to get the real physical address.

typedef uint16_t	DeviceId
	Device Type (sometimes known as subsystem ID)

Public Types inherited from gem5::SimObject
typedef SimObjectParams	Params

Public Member Functions
	VirtIOConsole (const Params &params)

virtual	~VirtIOConsole ()

void	readConfig (PacketPtr pkt, Addr cfgOffset)
	Read from the configuration space of a device.

Public Member Functions inherited from gem5::VirtIODeviceBase
	BitUnion8 (DeviceStatus) Bitfield< 7 > failed

	EndBitUnion (DeviceStatus) typedef VirtIODeviceBaseParams Params

	VirtIODeviceBase (const Params &params, DeviceId id, size_t config_size, FeatureBits features)

virtual	~VirtIODeviceBase ()

void	serialize (CheckpointOut &cp) const override
	Serialize an object.

void	unserialize (CheckpointIn &cp) override
	Unserialize an object.

virtual void	writeConfig (PacketPtr pkt, Addr cfgOffset)
	Write to the configuration space of a device.

virtual void	reset ()
	Driver-request device reset.

void	registerKickCallback (const std::function< void()> &callback)
	Register a callback to kick the guest through the transport interface.

void	onNotify (QueueID index)
	Driver is requesting service.

void	setQueueSelect (QueueID idx)
	Change currently active queue.

QueueID	getQueueSelect () const
	Get the currently active queue.

void	setQueueAddress (uint32_t address)
	Change the host physical address of the currently active queue.

uint32_t	getQueueAddress () const
	Get the host physical address of the currently active queue.

uint16_t	getQueueSize () const
	Get the size (descriptors) of the currently active queue.

void	setDeviceStatus (DeviceStatus status)
	Update device status and optionally reset device.

DeviceStatus	getDeviceStatus () const
	Retrieve the device status.

void	setGuestFeatures (FeatureBits features)
	Set feature bits accepted by the guest driver.

FeatureBits	getGuestFeatures () const
	Get features accepted by the guest driver.

Public Member Functions inherited from gem5::SimObject
const Params &	params () const

	SimObject (const Params &p)

virtual	~SimObject ()

virtual void	init ()
	init() is called after all C++ SimObjects have been created and all ports are connected.

virtual void	loadState (CheckpointIn &cp)
	loadState() is called on each SimObject when restoring from a checkpoint.

virtual void	initState ()
	initState() is called on each SimObject when not restoring from a checkpoint.

virtual void	regProbePoints ()
	Register probe points for this object.

virtual void	regProbeListeners ()
	Register probe listeners for this object.

ProbeManager *	getProbeManager ()
	Get the probe manager for this object.

virtual Port &	getPort (const std::string &if_name, PortID idx=InvalidPortID)
	Get a port with a given name and index.

virtual void	startup ()
	startup() is the final initialization call before simulation.

DrainState	drain () override
	Provide a default implementation of the drain interface for objects that don't need draining.

virtual void	memWriteback ()
	Write back dirty buffers to memory using functional writes.

virtual void	memInvalidate ()
	Invalidate the contents of memory buffers.

Public Member Functions inherited from gem5::EventManager
EventQueue *	eventQueue () const

void	schedule (Event &event, Tick when)

void	deschedule (Event &event)

void	reschedule (Event &event, Tick when, bool always=false)

void	schedule (Event *event, Tick when)

void	deschedule (Event *event)

void	reschedule (Event *event, Tick when, bool always=false)

void	wakeupEventQueue (Tick when=(Tick) -1)
	This function is not needed by the usual gem5 event loop but may be necessary in derived EventQueues which host gem5 on other schedulers.

void	setCurTick (Tick newVal)

	EventManager (EventManager &em)
	Event manger manages events in the event queue.

	EventManager (EventManager *em)

	EventManager (EventQueue *eq)

Public Member Functions inherited from gem5::Serializable
	Serializable ()

virtual	~Serializable ()

void	serializeSection (CheckpointOut &cp, const char *name) const
	Serialize an object into a new section.

void	serializeSection (CheckpointOut &cp, const std::string &name) const

void	unserializeSection (CheckpointIn &cp, const char *name)
	Unserialize an a child object.

void	unserializeSection (CheckpointIn &cp, const std::string &name)

Public Member Functions inherited from gem5::Drainable
DrainState	drainState () const
	Return the current drain state of an object.

virtual void	notifyFork ()
	Notify a child process of a fork.

Public Member Functions inherited from gem5::statistics::Group
	Group (Group parent, const char name=nullptr)
	Construct a new statistics group.

virtual	~Group ()

virtual void	regStats ()
	Callback to set stat parameters.

virtual void	resetStats ()
	Callback to reset stats.

virtual void	preDumpStats ()
	Callback before stats are dumped.

void	addStat (statistics::Info *info)
	Register a stat with this group.

const std::map< std::string, Group * > &	getStatGroups () const
	Get all child groups associated with this object.

const std::vector< Info * > &	getStats () const
	Get all stats associated with this object.

void	addStatGroup (const char name, Group block)
	Add a stat block as a child of this block.

const Info *	resolveStat (std::string name) const
	Resolve a stat by its name within this group.

void	mergeStatGroup (Group *block)
	Merge the contents (stats & children) of a block to this block.

	Group ()=delete

	Group (const Group &)=delete

Group &	operator= (const Group &)=delete

Public Member Functions inherited from gem5::Named
	Named (const std::string &name_)

virtual	~Named ()=default

virtual std::string	name () const

Protected Attributes
Config	config
	Currently active configuration (host byte order)

TermRecvQueue	qRecv
	Receive queue for port 0.

TermTransQueue	qTrans
	Transmit queue for port 0.

SerialDevice &	device

Protected Attributes inherited from gem5::VirtIODeviceBase
FeatureBits	guestFeatures
	Feature set accepted by the guest.

ByteOrder	byteOrder
	The byte order of the queues, descriptors, etc.

Protected Attributes inherited from gem5::SimObject
const SimObjectParams &	_params
	Cached copy of the object parameters.

Protected Attributes inherited from gem5::EventManager
EventQueue *	eventq
	A pointer to this object's event queue.

Static Protected Attributes
static const DeviceId	ID_CONSOLE = 0x03
	VirtIO device ID.

Feature bits
static const FeatureBits	F_SIZE = 0x01
	Provides the size information.

static const FeatureBits	F_MULTIPORT = 0x02
	Supports the multi-port interface.

Additional Inherited Members
Static Public Member Functions inherited from gem5::SimObject
static void	serializeAll (const std::string &cpt_dir)
	Create a checkpoint by serializing all SimObjects in the system.

static SimObject *	find (const char *name)
	Find the SimObject with the given name and return a pointer to it.

static void	setSimObjectResolver (SimObjectResolver *resolver)
	There is a single object name resolver, and it is only set when simulation is restoring from checkpoints.

static SimObjectResolver *	getSimObjectResolver ()
	There is a single object name resolver, and it is only set when simulation is restoring from checkpoints.

Static Public Member Functions inherited from gem5::Serializable
static const std::string &	currentSection ()
	Gets the fully-qualified name of the active section.

static void	generateCheckpointOut (const std::string &cpt_dir, std::ofstream &outstream)
	Generate a checkpoint file so that the serialization can be routed to it.

Public Attributes inherited from gem5::VirtIODeviceBase
Bitfield< 2 >	driver_ok

Bitfield< 1 >	driver

Bitfield< 0 >	acknowledge

const DeviceId	deviceId
	Device ID (sometimes known as subsystem ID)

const size_t	configSize
	Size of the device's configuration space.

const FeatureBits	deviceFeatures
	Feature set offered by the device.

Protected Member Functions inherited from gem5::VirtIODeviceBase
void	kick ()
	Inform the guest of available buffers.

void	registerQueue (VirtQueue &queue)
	Register a new VirtQueue with the device model.

void	readConfigBlob (PacketPtr pkt, Addr cfgOffset, const uint8_t *cfg)
	Read configuration data from a device structure.

void	writeConfigBlob (PacketPtr pkt, Addr cfgOffset, uint8_t *cfg)
	Write configuration data to a device structure.

Protected Member Functions inherited from gem5::Drainable
	Drainable ()

virtual	~Drainable ()

virtual void	drainResume ()
	Resume execution after a successful drain.

void	signalDrainDone () const
	Signal that an object is drained.

Detailed Description

VirtIO console.

The VirtIO console uses the following queues:

Port0 receive (from host to guest)
Port0 transmit (from guest to host)
Control receive (optional)
Control transmit (optional)
Port1 receive (optional)
Port1 transmit (optional)

This implementation implements the minimum of features for one port, which means that the multiport feature is not announced and only queue 0 and 1 are available.

See also: https://github.com/rustyrussell/virtio-spec; http://docs.oasis-open.org/virtio/virtio/v1.0/virtio-v1.0.html

Definition at line 68 of file console.hh.

Member Typedef Documentation

◆ Params

typedef VirtIOConsoleParams gem5::VirtIOConsole::Params

Definition at line 71 of file console.hh.

Constructor & Destructor Documentation

◆ VirtIOConsole()

gem5::VirtIOConsole::VirtIOConsole ( const Params & params )

Definition at line 47 of file console.cc.

References gem5::VirtIOConsole::Config::cols, config, device, qRecv, qTrans, gem5::SerialDevice::regInterfaceCallback(), gem5::VirtIODeviceBase::registerQueue(), gem5::VirtIOConsole::Config::rows, and gem5::VirtIOConsole::TermRecvQueue::trySend().

◆ ~VirtIOConsole()

gem5::VirtIOConsole::~VirtIOConsole ( )

virtual

Definition at line 63 of file console.cc.

Member Function Documentation

◆ readConfig()

void gem5::VirtIOConsole::readConfig	(	PacketPtr	pkt,
		Addr	cfgOffset )

virtual

Read from the configuration space of a device.

This method is called by the transport interface to read data from a device model's configuration space. The device model should use the cfgOffset parameter as the offset into its configuration space.

Warning: The address in the packet should not be used to determine the offset into a device's configuration space.

Parameters

pkt	Read request packet.
cfgOffset	Offset into the device's configuration space.

Reimplemented from gem5::VirtIODeviceBase.

Definition at line 67 of file console.cc.

References gem5::VirtIODeviceBase::byteOrder, gem5::VirtIOConsole::Config::cols, config, gem5::htog(), gem5::VirtIODeviceBase::readConfigBlob(), and gem5::VirtIOConsole::Config::rows.

Member Data Documentation

◆ config

Config gem5::VirtIOConsole::config

protected

Currently active configuration (host byte order)

Definition at line 91 of file console.hh.

Referenced by readConfig(), and VirtIOConsole().

◆ device

SerialDevice& gem5::VirtIOConsole::device

protected

Definition at line 155 of file console.hh.

Referenced by gem5::VirtIOConsole::TermRecvQueue::trySend(), and VirtIOConsole().

◆ F_MULTIPORT

const FeatureBits gem5::VirtIOConsole::F_MULTIPORT = 0x02

staticprotected

Supports the multi-port interface.

Definition at line 102 of file console.hh.

◆ F_SIZE

const FeatureBits gem5::VirtIOConsole::F_SIZE = 0x01

staticprotected

Provides the size information.

Definition at line 100 of file console.hh.

◆ ID_CONSOLE

const DeviceId gem5::VirtIOConsole::ID_CONSOLE = 0x03

staticprotected

VirtIO device ID.

Definition at line 94 of file console.hh.

◆ qRecv

TermRecvQueue gem5::VirtIOConsole::qRecv

protected

Receive queue for port 0.

Definition at line 130 of file console.hh.

Referenced by VirtIOConsole().

◆ qTrans

TermTransQueue gem5::VirtIOConsole::qTrans

protected

Transmit queue for port 0.

Definition at line 152 of file console.hh.

Referenced by VirtIOConsole().

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

dev/virtio/console.hh
dev/virtio/console.cc

Classes

Public Types

Public Member Functions

Protected Attributes

Static Protected Attributes

Additional Inherited Members

Detailed Description

Member Typedef Documentation

◆ Params

Constructor & Destructor Documentation

◆ VirtIOConsole()

◆ ~VirtIOConsole()

Member Function Documentation

◆ readConfig()

Member Data Documentation

◆ config

◆ device

◆ F_MULTIPORT

◆ F_SIZE

◆ ID_CONSOLE

◆ qRecv

◆ qTrans