mirror of https://gitlab.com/qemu-project/qemu
You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
239 lines
10 KiB
C
239 lines
10 KiB
C
/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
|
|
#ifndef _LINUX_VHOST_H
|
|
#define _LINUX_VHOST_H
|
|
/* Userspace interface for in-kernel virtio accelerators. */
|
|
|
|
/* vhost is used to reduce the number of system calls involved in virtio.
|
|
*
|
|
* Existing virtio net code is used in the guest without modification.
|
|
*
|
|
* This header includes interface used by userspace hypervisor for
|
|
* device configuration.
|
|
*/
|
|
|
|
#include <linux/vhost_types.h>
|
|
#include <linux/types.h>
|
|
#include <linux/ioctl.h>
|
|
|
|
#define VHOST_FILE_UNBIND -1
|
|
|
|
/* ioctls */
|
|
|
|
#define VHOST_VIRTIO 0xAF
|
|
|
|
/* Features bitmask for forward compatibility. Transport bits are used for
|
|
* vhost specific features. */
|
|
#define VHOST_GET_FEATURES _IOR(VHOST_VIRTIO, 0x00, __u64)
|
|
#define VHOST_SET_FEATURES _IOW(VHOST_VIRTIO, 0x00, __u64)
|
|
|
|
/* Set current process as the (exclusive) owner of this file descriptor. This
|
|
* must be called before any other vhost command. Further calls to
|
|
* VHOST_OWNER_SET fail until VHOST_OWNER_RESET is called. */
|
|
#define VHOST_SET_OWNER _IO(VHOST_VIRTIO, 0x01)
|
|
/* Give up ownership, and reset the device to default values.
|
|
* Allows subsequent call to VHOST_OWNER_SET to succeed. */
|
|
#define VHOST_RESET_OWNER _IO(VHOST_VIRTIO, 0x02)
|
|
|
|
/* Set up/modify memory layout */
|
|
#define VHOST_SET_MEM_TABLE _IOW(VHOST_VIRTIO, 0x03, struct vhost_memory)
|
|
|
|
/* Write logging setup. */
|
|
/* Memory writes can optionally be logged by setting bit at an offset
|
|
* (calculated from the physical address) from specified log base.
|
|
* The bit is set using an atomic 32 bit operation. */
|
|
/* Set base address for logging. */
|
|
#define VHOST_SET_LOG_BASE _IOW(VHOST_VIRTIO, 0x04, __u64)
|
|
/* Specify an eventfd file descriptor to signal on log write. */
|
|
#define VHOST_SET_LOG_FD _IOW(VHOST_VIRTIO, 0x07, int)
|
|
/* By default, a device gets one vhost_worker that its virtqueues share. This
|
|
* command allows the owner of the device to create an additional vhost_worker
|
|
* for the device. It can later be bound to 1 or more of its virtqueues using
|
|
* the VHOST_ATTACH_VRING_WORKER command.
|
|
*
|
|
* This must be called after VHOST_SET_OWNER and the caller must be the owner
|
|
* of the device. The new thread will inherit caller's cgroups and namespaces,
|
|
* and will share the caller's memory space. The new thread will also be
|
|
* counted against the caller's RLIMIT_NPROC value.
|
|
*
|
|
* The worker's ID used in other commands will be returned in
|
|
* vhost_worker_state.
|
|
*/
|
|
#define VHOST_NEW_WORKER _IOR(VHOST_VIRTIO, 0x8, struct vhost_worker_state)
|
|
/* Free a worker created with VHOST_NEW_WORKER if it's not attached to any
|
|
* virtqueue. If userspace is not able to call this for workers its created,
|
|
* the kernel will free all the device's workers when the device is closed.
|
|
*/
|
|
#define VHOST_FREE_WORKER _IOW(VHOST_VIRTIO, 0x9, struct vhost_worker_state)
|
|
|
|
/* Ring setup. */
|
|
/* Set number of descriptors in ring. This parameter can not
|
|
* be modified while ring is running (bound to a device). */
|
|
#define VHOST_SET_VRING_NUM _IOW(VHOST_VIRTIO, 0x10, struct vhost_vring_state)
|
|
/* Set addresses for the ring. */
|
|
#define VHOST_SET_VRING_ADDR _IOW(VHOST_VIRTIO, 0x11, struct vhost_vring_addr)
|
|
/* Base value where queue looks for available descriptors */
|
|
#define VHOST_SET_VRING_BASE _IOW(VHOST_VIRTIO, 0x12, struct vhost_vring_state)
|
|
/* Get accessor: reads index, writes value in num */
|
|
#define VHOST_GET_VRING_BASE _IOWR(VHOST_VIRTIO, 0x12, struct vhost_vring_state)
|
|
|
|
/* Set the vring byte order in num. Valid values are VHOST_VRING_LITTLE_ENDIAN
|
|
* or VHOST_VRING_BIG_ENDIAN (other values return -EINVAL).
|
|
* The byte order cannot be changed while the device is active: trying to do so
|
|
* returns -EBUSY.
|
|
* This is a legacy only API that is simply ignored when VIRTIO_F_VERSION_1 is
|
|
* set.
|
|
* Not all kernel configurations support this ioctl, but all configurations that
|
|
* support SET also support GET.
|
|
*/
|
|
#define VHOST_VRING_LITTLE_ENDIAN 0
|
|
#define VHOST_VRING_BIG_ENDIAN 1
|
|
#define VHOST_SET_VRING_ENDIAN _IOW(VHOST_VIRTIO, 0x13, struct vhost_vring_state)
|
|
#define VHOST_GET_VRING_ENDIAN _IOW(VHOST_VIRTIO, 0x14, struct vhost_vring_state)
|
|
/* Attach a vhost_worker created with VHOST_NEW_WORKER to one of the device's
|
|
* virtqueues.
|
|
*
|
|
* This will replace the virtqueue's existing worker. If the replaced worker
|
|
* is no longer attached to any virtqueues, it can be freed with
|
|
* VHOST_FREE_WORKER.
|
|
*/
|
|
#define VHOST_ATTACH_VRING_WORKER _IOW(VHOST_VIRTIO, 0x15, \
|
|
struct vhost_vring_worker)
|
|
/* Return the vring worker's ID */
|
|
#define VHOST_GET_VRING_WORKER _IOWR(VHOST_VIRTIO, 0x16, \
|
|
struct vhost_vring_worker)
|
|
|
|
/* The following ioctls use eventfd file descriptors to signal and poll
|
|
* for events. */
|
|
|
|
/* Set eventfd to poll for added buffers */
|
|
#define VHOST_SET_VRING_KICK _IOW(VHOST_VIRTIO, 0x20, struct vhost_vring_file)
|
|
/* Set eventfd to signal when buffers have beed used */
|
|
#define VHOST_SET_VRING_CALL _IOW(VHOST_VIRTIO, 0x21, struct vhost_vring_file)
|
|
/* Set eventfd to signal an error */
|
|
#define VHOST_SET_VRING_ERR _IOW(VHOST_VIRTIO, 0x22, struct vhost_vring_file)
|
|
/* Set busy loop timeout (in us) */
|
|
#define VHOST_SET_VRING_BUSYLOOP_TIMEOUT _IOW(VHOST_VIRTIO, 0x23, \
|
|
struct vhost_vring_state)
|
|
/* Get busy loop timeout (in us) */
|
|
#define VHOST_GET_VRING_BUSYLOOP_TIMEOUT _IOW(VHOST_VIRTIO, 0x24, \
|
|
struct vhost_vring_state)
|
|
|
|
/* Set or get vhost backend capability */
|
|
|
|
#define VHOST_SET_BACKEND_FEATURES _IOW(VHOST_VIRTIO, 0x25, __u64)
|
|
#define VHOST_GET_BACKEND_FEATURES _IOR(VHOST_VIRTIO, 0x26, __u64)
|
|
|
|
/* VHOST_NET specific defines */
|
|
|
|
/* Attach virtio net ring to a raw socket, or tap device.
|
|
* The socket must be already bound to an ethernet device, this device will be
|
|
* used for transmit. Pass fd -1 to unbind from the socket and the transmit
|
|
* device. This can be used to stop the ring (e.g. for migration). */
|
|
#define VHOST_NET_SET_BACKEND _IOW(VHOST_VIRTIO, 0x30, struct vhost_vring_file)
|
|
|
|
/* VHOST_SCSI specific defines */
|
|
|
|
#define VHOST_SCSI_SET_ENDPOINT _IOW(VHOST_VIRTIO, 0x40, struct vhost_scsi_target)
|
|
#define VHOST_SCSI_CLEAR_ENDPOINT _IOW(VHOST_VIRTIO, 0x41, struct vhost_scsi_target)
|
|
/* Changing this breaks userspace. */
|
|
#define VHOST_SCSI_GET_ABI_VERSION _IOW(VHOST_VIRTIO, 0x42, int)
|
|
/* Set and get the events missed flag */
|
|
#define VHOST_SCSI_SET_EVENTS_MISSED _IOW(VHOST_VIRTIO, 0x43, __u32)
|
|
#define VHOST_SCSI_GET_EVENTS_MISSED _IOW(VHOST_VIRTIO, 0x44, __u32)
|
|
|
|
/* VHOST_VSOCK specific defines */
|
|
|
|
#define VHOST_VSOCK_SET_GUEST_CID _IOW(VHOST_VIRTIO, 0x60, __u64)
|
|
#define VHOST_VSOCK_SET_RUNNING _IOW(VHOST_VIRTIO, 0x61, int)
|
|
|
|
/* VHOST_VDPA specific defines */
|
|
|
|
/* Get the device id. The device ids follow the same definition of
|
|
* the device id defined in virtio-spec.
|
|
*/
|
|
#define VHOST_VDPA_GET_DEVICE_ID _IOR(VHOST_VIRTIO, 0x70, __u32)
|
|
/* Get and set the status. The status bits follow the same definition
|
|
* of the device status defined in virtio-spec.
|
|
*/
|
|
#define VHOST_VDPA_GET_STATUS _IOR(VHOST_VIRTIO, 0x71, __u8)
|
|
#define VHOST_VDPA_SET_STATUS _IOW(VHOST_VIRTIO, 0x72, __u8)
|
|
/* Get and set the device config. The device config follows the same
|
|
* definition of the device config defined in virtio-spec.
|
|
*/
|
|
#define VHOST_VDPA_GET_CONFIG _IOR(VHOST_VIRTIO, 0x73, \
|
|
struct vhost_vdpa_config)
|
|
#define VHOST_VDPA_SET_CONFIG _IOW(VHOST_VIRTIO, 0x74, \
|
|
struct vhost_vdpa_config)
|
|
/* Enable/disable the ring. */
|
|
#define VHOST_VDPA_SET_VRING_ENABLE _IOW(VHOST_VIRTIO, 0x75, \
|
|
struct vhost_vring_state)
|
|
/* Get the max ring size. */
|
|
#define VHOST_VDPA_GET_VRING_NUM _IOR(VHOST_VIRTIO, 0x76, __u16)
|
|
|
|
/* Set event fd for config interrupt*/
|
|
#define VHOST_VDPA_SET_CONFIG_CALL _IOW(VHOST_VIRTIO, 0x77, int)
|
|
|
|
/* Get the valid iova range */
|
|
#define VHOST_VDPA_GET_IOVA_RANGE _IOR(VHOST_VIRTIO, 0x78, \
|
|
struct vhost_vdpa_iova_range)
|
|
/* Get the config size */
|
|
#define VHOST_VDPA_GET_CONFIG_SIZE _IOR(VHOST_VIRTIO, 0x79, __u32)
|
|
|
|
/* Get the number of address spaces. */
|
|
#define VHOST_VDPA_GET_AS_NUM _IOR(VHOST_VIRTIO, 0x7A, unsigned int)
|
|
|
|
/* Get the group for a virtqueue: read index, write group in num,
|
|
* The virtqueue index is stored in the index field of
|
|
* vhost_vring_state. The group for this specific virtqueue is
|
|
* returned via num field of vhost_vring_state.
|
|
*/
|
|
#define VHOST_VDPA_GET_VRING_GROUP _IOWR(VHOST_VIRTIO, 0x7B, \
|
|
struct vhost_vring_state)
|
|
/* Set the ASID for a virtqueue group. The group index is stored in
|
|
* the index field of vhost_vring_state, the ASID associated with this
|
|
* group is stored at num field of vhost_vring_state.
|
|
*/
|
|
#define VHOST_VDPA_SET_GROUP_ASID _IOW(VHOST_VIRTIO, 0x7C, \
|
|
struct vhost_vring_state)
|
|
|
|
/* Suspend a device so it does not process virtqueue requests anymore
|
|
*
|
|
* After the return of ioctl the device must preserve all the necessary state
|
|
* (the virtqueue vring base plus the possible device specific states) that is
|
|
* required for restoring in the future. The device must not change its
|
|
* configuration after that point.
|
|
*/
|
|
#define VHOST_VDPA_SUSPEND _IO(VHOST_VIRTIO, 0x7D)
|
|
|
|
/* Resume a device so it can resume processing virtqueue requests
|
|
*
|
|
* After the return of this ioctl the device will have restored all the
|
|
* necessary states and it is fully operational to continue processing the
|
|
* virtqueue descriptors.
|
|
*/
|
|
#define VHOST_VDPA_RESUME _IO(VHOST_VIRTIO, 0x7E)
|
|
|
|
/* Get the group for the descriptor table including driver & device areas
|
|
* of a virtqueue: read index, write group in num.
|
|
* The virtqueue index is stored in the index field of vhost_vring_state.
|
|
* The group ID of the descriptor table for this specific virtqueue
|
|
* is returned via num field of vhost_vring_state.
|
|
*/
|
|
#define VHOST_VDPA_GET_VRING_DESC_GROUP _IOWR(VHOST_VIRTIO, 0x7F, \
|
|
struct vhost_vring_state)
|
|
|
|
|
|
/* Get the count of all virtqueues */
|
|
#define VHOST_VDPA_GET_VQS_COUNT _IOR(VHOST_VIRTIO, 0x80, __u32)
|
|
|
|
/* Get the number of virtqueue groups. */
|
|
#define VHOST_VDPA_GET_GROUP_NUM _IOR(VHOST_VIRTIO, 0x81, __u32)
|
|
|
|
/* Get the queue size of a specific virtqueue.
|
|
* userspace set the vring index in vhost_vring_state.index
|
|
* kernel set the queue size in vhost_vring_state.num
|
|
*/
|
|
#define VHOST_VDPA_GET_VRING_SIZE _IOWR(VHOST_VIRTIO, 0x82, \
|
|
struct vhost_vring_state)
|
|
#endif
|