VirtIO - Revision history

TheCatgirls: Actually, 1.3 is latest, not 1.2

2024-12-19T01:39:26Z

Actually, 1.3 is latest, not 1.2

← Older revision		Revision as of 01:39, 19 December 2024
Line 1:		Line 1:
	VirtIO is a standard for performant virtualized hardware for use within virtual machines, created and managed by the [https://www.oasis-open.org/committees/tc_home.php?wg_abbrev=virtio OASIS Open Virtual I/O Device TC]. VirtIO supports a variety of devices, such as, but not limited to: block (e.g. hard drive), network card, GPU, etc. Each of these devices have their own specific configuration and features, but all use the same underlying VirtIO queue structure for relaying data and commands to & from the device.		VirtIO is a standard for performant virtualized hardware for use within virtual machines, created and managed by the [https://www.oasis-open.org/committees/tc_home.php?wg_abbrev=virtio OASIS Open Virtual I/O Device TC]. VirtIO supports a variety of devices, such as, but not limited to: block (e.g. hard drive), network card, GPU, etc. Each of these devices have their own specific configuration and features, but all use the same underlying VirtIO queue structure for relaying data and commands to & from the device.

	The latest specification, 1.2, is available at https://docs.oasis-open.org/virtio/virtio/v1.2/csd01/virtio-v1.2-csd01.html.		The latest specification, 1.3, is available at https://docs.oasis-open.org/virtio/virtio/v1.3/csd01/virtio-v1.3-csd01.html.

	VirtIO provides a common framework for devices to be identified and for communicating between the device implementation and the driver.		VirtIO provides a common framework for devices to be identified and for communicating between the device implementation and the driver.

TheCatgirls: s/driver/drm

2024-12-19T01:37:44Z

s/driver/drm

← Older revision		Revision as of 01:37, 19 December 2024
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	</pre>		</pre>

	virtio-gpu can be used to forward various things to Linux hosts, such as native Wayland surfaces, or Linux ~~driver~~ ioctls. Commonly this is used with Linux guests, but there's nothing preventing usage in any other OS running as guest.		virtio-gpu can be used to forward various things to Linux hosts, such as native Wayland surfaces, or Linux drm ioctls. Commonly this is used with Linux guests, but there's nothing preventing usage in any other OS running as guest.

	=== Device Types ===		=== Device Types ===

TheCatgirls: Link to the virtio spec + list the modern virtio-gpu capsets

2024-12-19T01:37:05Z

Link to the virtio spec + list the modern virtio-gpu capsets

← Older revision		Revision as of 01:37, 19 December 2024
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	VirtIO is a standard for performant virtualized hardware for use within virtual machines, created and managed by the [https://www.oasis-open.org/committees/tc_home.php?wg_abbrev=virtio OASIS Open Virtual I/O Device TC]. VirtIO supports a variety of devices, such as, but not limited to: block (e.g. hard drive), network card, GPU, etc. Each of these devices have their own specific configuration and features, but all use the same underlying VirtIO queue structure for relaying data and commands to & from the device.		VirtIO is a standard for performant virtualized hardware for use within virtual machines, created and managed by the [https://www.oasis-open.org/committees/tc_home.php?wg_abbrev=virtio OASIS Open Virtual I/O Device TC]. VirtIO supports a variety of devices, such as, but not limited to: block (e.g. hard drive), network card, GPU, etc. Each of these devices have their own specific configuration and features, but all use the same underlying VirtIO queue structure for relaying data and commands to & from the device.

			The latest specification, 1.2, is available at https://docs.oasis-open.org/virtio/virtio/v1.2/csd01/virtio-v1.2-csd01.html.

			VirtIO provides a common framework for devices to be identified and for communicating between the device implementation and the driver.
			Communication for is handled through so-called ''virtqueues''.

			Certain implementations extend the features available.

			For example, here is the list of virtio-gpu capsets in Mesa, at <code>src/gfxstream/guest/platform/include/virtgpu_gfxstream_protocol.h</code>:
			<pre>
			#define VIRTGPU_CAPSET_VIRGL 1
			#define VIRTGPU_CAPSET_VIRGL2 2
			#define VIRTGPU_CAPSET_GFXSTREAM_VULKAN 3
			#define VIRTGPU_CAPSET_VENUS 4
			#define VIRTGPU_CAPSET_CROSS_DOMAIN 5
			#define VIRTGPU_CAPSET_DRM 6
			#define VIRTGPU_CAPSET_GFXSTREAM_MAGMA 7
			#define VIRTGPU_CAPSET_GFXSTREAM_GLES 8
			#define VIRTGPU_CAPSET_GFXSTREAM_COMPOSER 9
			</pre>

			virtio-gpu can be used to forward various things to Linux hosts, such as native Wayland surfaces, or Linux driver ioctls. Commonly this is used with Linux guests, but there's nothing preventing usage in any other OS running as guest.

	=== Device Types ===		=== Device Types ===

TheCatgirls: List all device types, TODO fill a description

2024-12-19T01:21:09Z

List all device types, TODO fill a description

Show changes

Repnop at 23:02, 22 November 2022

2022-11-22T23:02:44Z

← Older revision		Revision as of 23:02, 22 November 2022
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	VirtIO is a standard for performant virtualized hardware for use within virtual machines created and managed by the [https://www.oasis-open.org/committees/tc_home.php?wg_abbrev=virtio OASIS Open Virtual I/O Device TC].		VirtIO is a standard for performant virtualized hardware for use within virtual machines, created and managed by the [https://www.oasis-open.org/committees/tc_home.php?wg_abbrev=virtio OASIS Open Virtual I/O Device TC]. VirtIO supports a variety of devices, such as, but not limited to: block (e.g. hard drive), network card, GPU, etc. Each of these devices have their own specific configuration and features, but all use the same underlying VirtIO queue structure for relaying data and commands to & from the device.

			=== Device Types ===
			{\| class="wikitable sortable mw-collapsible"
			\|+VirtIO Device Types
			!Device Name
			!Device ID
			!Description
			\|-
			\|Network Card
			\|1
			\|Ethernet network interface
			\|-
			\|Block Device
			\|2
			\|Block storage capabilities, e.g. hard drive, for storing files and other information
			\|-
			\|Console
			\|3
			\|Serial console device for simple I/O communication
			\|-
			\|Entropy Source
			\|4
			\|A source of entropy for cryptographically secure [[PRNG]]<nowiki/>s
			\|-
			\|Memory Ballooning (Traditional)
			\|5
			\|[TODO]
			\|-
			\|ioMemory
			\|6
			\|[TODO]
			\|-
			\|rpmsg
			\|7
			\|[TODO]
			\|-
			\|SCSI Host
			\|8
			\|Grouping of one or more virtual logical units (e.g. disks) that can be managed via the SCSI protocol
			\|-
			\|9P Transport
			\|9
			\|[TODO]
			\|-
			\|MAC80211 WLAN
			\|10
			\|802.11 WLAN interface for wireless [[LAN]] communication
			\|-
			\|rproc Serial
			\|11
			\|[TODO]
			\|-
			\|VirtIO CAIF
			\|12
			\|[TODO]
			\|-
			\|Memory Balloon
			\|13
			\|[TODO]
			\|-
			\|GPU
			\|16
			\|2D & 3D GPU device, requires a 3D GPU on the host machine for 3D mode, as well as negotiating specific features
			\|-
			\|
			\|
			\|
			\|-
			\|
			\|
			\|
			\|-
			\|
			\|
			\|
			\|}

			=== Device Transports ===
			VirtIO supports three different types of device transports: [[PCI\|PCI Bus]], [[MMIO]], and [[Channel I/O]]. The PCIe transport is configured via the normal PCIe configuration mechanisms, while the MMIO transport is configured strictly via MMIO reads and writes.

Repnop: Initial page test

2022-11-22T21:54:06Z

Initial page test

New page

VirtIO is a standard for performant virtualized hardware for use within virtual machines created and managed by the [https://www.oasis-open.org/committees/tc_home.php?wg_abbrev=virtio OASIS Open Virtual I/O Device TC].