include/uapi/linux/virtio_mmio.h

Source file repositories/reference/linux-study-clean/include/uapi/linux/virtio_mmio.h

File Facts

System
Linux kernel
Corpus path
include/uapi/linux/virtio_mmio.h
Extension
.h
Size
4969 bytes
Lines
153
Domain
Core OS
Bucket
Core Kernel Interface
Inferred role
Core OS: implementation source
Status
source implementation candidate

Why This File Exists

Core operating-system implementation surface: boot, tasks, memory, VFS, syscall-facing interfaces, synchronization, credentials, and isolation.

Dependency Surface

Detected Declarations

Annotated Snippet

#ifndef _LINUX_VIRTIO_MMIO_H
#define _LINUX_VIRTIO_MMIO_H

/*
 * Control registers
 */

/* Magic value ("virt" string) - Read Only */
#define VIRTIO_MMIO_MAGIC_VALUE		0x000

/* Virtio device version - Read Only */
#define VIRTIO_MMIO_VERSION		0x004

/* Virtio device ID - Read Only */
#define VIRTIO_MMIO_DEVICE_ID		0x008

/* Virtio vendor ID - Read Only */
#define VIRTIO_MMIO_VENDOR_ID		0x00c

/* Bitmask of the features supported by the device (host)
 * (32 bits per set) - Read Only */
#define VIRTIO_MMIO_DEVICE_FEATURES	0x010

/* Device (host) features set selector - Write Only */
#define VIRTIO_MMIO_DEVICE_FEATURES_SEL	0x014

/* Bitmask of features activated by the driver (guest)
 * (32 bits per set) - Write Only */
#define VIRTIO_MMIO_DRIVER_FEATURES	0x020

/* Activated features set selector - Write Only */
#define VIRTIO_MMIO_DRIVER_FEATURES_SEL	0x024


#ifndef VIRTIO_MMIO_NO_LEGACY /* LEGACY DEVICES ONLY! */

/* Guest's memory page size in bytes - Write Only */
#define VIRTIO_MMIO_GUEST_PAGE_SIZE	0x028

#endif


/* Queue selector - Write Only */
#define VIRTIO_MMIO_QUEUE_SEL		0x030

/* Maximum size of the currently selected queue - Read Only */
#define VIRTIO_MMIO_QUEUE_NUM_MAX	0x034

/* Queue size for the currently selected queue - Write Only */
#define VIRTIO_MMIO_QUEUE_NUM		0x038


#ifndef VIRTIO_MMIO_NO_LEGACY /* LEGACY DEVICES ONLY! */

/* Used Ring alignment for the currently selected queue - Write Only */
#define VIRTIO_MMIO_QUEUE_ALIGN		0x03c

/* Guest's PFN for the currently selected queue - Read Write */
#define VIRTIO_MMIO_QUEUE_PFN		0x040

#endif


/* Ready bit for the currently selected queue - Read Write */
#define VIRTIO_MMIO_QUEUE_READY		0x044

/* Queue notifier - Write Only */
#define VIRTIO_MMIO_QUEUE_NOTIFY	0x050

/* Interrupt status - Read Only */
#define VIRTIO_MMIO_INTERRUPT_STATUS	0x060

/* Interrupt acknowledge - Write Only */
#define VIRTIO_MMIO_INTERRUPT_ACK	0x064

/* Device status register - Read Write */
#define VIRTIO_MMIO_STATUS		0x070

/* Selected queue's Descriptor Table address, 64 bits in two halves */
#define VIRTIO_MMIO_QUEUE_DESC_LOW	0x080
#define VIRTIO_MMIO_QUEUE_DESC_HIGH	0x084

/* Selected queue's Available Ring address, 64 bits in two halves */
#define VIRTIO_MMIO_QUEUE_AVAIL_LOW	0x090
#define VIRTIO_MMIO_QUEUE_AVAIL_HIGH	0x094

/* Selected queue's Used Ring address, 64 bits in two halves */
#define VIRTIO_MMIO_QUEUE_USED_LOW	0x0a0
#define VIRTIO_MMIO_QUEUE_USED_HIGH	0x0a4

Annotation

Implementation Notes