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153 lines
6.3 KiB
153 lines
6.3 KiB
/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ |
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#ifndef _LINUX_VHOST_H |
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#define _LINUX_VHOST_H |
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/* Userspace interface for in-kernel virtio accelerators. */ |
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/* vhost is used to reduce the number of system calls involved in virtio. |
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* |
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* Existing virtio net code is used in the guest without modification. |
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* |
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* This header includes interface used by userspace hypervisor for |
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* device configuration. |
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*/ |
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#include <linux/vhost_types.h> |
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#include <linux/types.h> |
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#include <linux/ioctl.h> |
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#define VHOST_FILE_UNBIND -1 |
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/* ioctls */ |
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#define VHOST_VIRTIO 0xAF |
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/* Features bitmask for forward compatibility. Transport bits are used for |
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* vhost specific features. */ |
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#define VHOST_GET_FEATURES _IOR(VHOST_VIRTIO, 0x00, __u64) |
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#define VHOST_SET_FEATURES _IOW(VHOST_VIRTIO, 0x00, __u64) |
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/* Set current process as the (exclusive) owner of this file descriptor. This |
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* must be called before any other vhost command. Further calls to |
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* VHOST_OWNER_SET fail until VHOST_OWNER_RESET is called. */ |
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#define VHOST_SET_OWNER _IO(VHOST_VIRTIO, 0x01) |
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/* Give up ownership, and reset the device to default values. |
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* Allows subsequent call to VHOST_OWNER_SET to succeed. */ |
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#define VHOST_RESET_OWNER _IO(VHOST_VIRTIO, 0x02) |
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/* Set up/modify memory layout */ |
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#define VHOST_SET_MEM_TABLE _IOW(VHOST_VIRTIO, 0x03, struct vhost_memory) |
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/* Write logging setup. */ |
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/* Memory writes can optionally be logged by setting bit at an offset |
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* (calculated from the physical address) from specified log base. |
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* The bit is set using an atomic 32 bit operation. */ |
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/* Set base address for logging. */ |
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#define VHOST_SET_LOG_BASE _IOW(VHOST_VIRTIO, 0x04, __u64) |
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/* Specify an eventfd file descriptor to signal on log write. */ |
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#define VHOST_SET_LOG_FD _IOW(VHOST_VIRTIO, 0x07, int) |
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/* Ring setup. */ |
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/* Set number of descriptors in ring. This parameter can not |
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* be modified while ring is running (bound to a device). */ |
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#define VHOST_SET_VRING_NUM _IOW(VHOST_VIRTIO, 0x10, struct vhost_vring_state) |
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/* Set addresses for the ring. */ |
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#define VHOST_SET_VRING_ADDR _IOW(VHOST_VIRTIO, 0x11, struct vhost_vring_addr) |
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/* Base value where queue looks for available descriptors */ |
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#define VHOST_SET_VRING_BASE _IOW(VHOST_VIRTIO, 0x12, struct vhost_vring_state) |
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/* Get accessor: reads index, writes value in num */ |
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#define VHOST_GET_VRING_BASE _IOWR(VHOST_VIRTIO, 0x12, struct vhost_vring_state) |
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/* Set the vring byte order in num. Valid values are VHOST_VRING_LITTLE_ENDIAN |
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* or VHOST_VRING_BIG_ENDIAN (other values return -EINVAL). |
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* The byte order cannot be changed while the device is active: trying to do so |
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* returns -EBUSY. |
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* This is a legacy only API that is simply ignored when VIRTIO_F_VERSION_1 is |
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* set. |
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* Not all kernel configurations support this ioctl, but all configurations that |
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* support SET also support GET. |
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*/ |
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#define VHOST_VRING_LITTLE_ENDIAN 0 |
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#define VHOST_VRING_BIG_ENDIAN 1 |
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#define VHOST_SET_VRING_ENDIAN _IOW(VHOST_VIRTIO, 0x13, struct vhost_vring_state) |
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#define VHOST_GET_VRING_ENDIAN _IOW(VHOST_VIRTIO, 0x14, struct vhost_vring_state) |
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/* The following ioctls use eventfd file descriptors to signal and poll |
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* for events. */ |
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/* Set eventfd to poll for added buffers */ |
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#define VHOST_SET_VRING_KICK _IOW(VHOST_VIRTIO, 0x20, struct vhost_vring_file) |
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/* Set eventfd to signal when buffers have beed used */ |
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#define VHOST_SET_VRING_CALL _IOW(VHOST_VIRTIO, 0x21, struct vhost_vring_file) |
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/* Set eventfd to signal an error */ |
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#define VHOST_SET_VRING_ERR _IOW(VHOST_VIRTIO, 0x22, struct vhost_vring_file) |
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/* Set busy loop timeout (in us) */ |
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#define VHOST_SET_VRING_BUSYLOOP_TIMEOUT _IOW(VHOST_VIRTIO, 0x23, \ |
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struct vhost_vring_state) |
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/* Get busy loop timeout (in us) */ |
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#define VHOST_GET_VRING_BUSYLOOP_TIMEOUT _IOW(VHOST_VIRTIO, 0x24, \ |
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struct vhost_vring_state) |
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/* Set or get vhost backend capability */ |
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/* Use message type V2 */ |
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#define VHOST_BACKEND_F_IOTLB_MSG_V2 0x1 |
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/* IOTLB can accept batching hints */ |
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#define VHOST_BACKEND_F_IOTLB_BATCH 0x2 |
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#define VHOST_SET_BACKEND_FEATURES _IOW(VHOST_VIRTIO, 0x25, __u64) |
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#define VHOST_GET_BACKEND_FEATURES _IOR(VHOST_VIRTIO, 0x26, __u64) |
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/* VHOST_NET specific defines */ |
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/* Attach virtio net ring to a raw socket, or tap device. |
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* The socket must be already bound to an ethernet device, this device will be |
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* used for transmit. Pass fd -1 to unbind from the socket and the transmit |
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* device. This can be used to stop the ring (e.g. for migration). */ |
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#define VHOST_NET_SET_BACKEND _IOW(VHOST_VIRTIO, 0x30, struct vhost_vring_file) |
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/* VHOST_SCSI specific defines */ |
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#define VHOST_SCSI_SET_ENDPOINT _IOW(VHOST_VIRTIO, 0x40, struct vhost_scsi_target) |
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#define VHOST_SCSI_CLEAR_ENDPOINT _IOW(VHOST_VIRTIO, 0x41, struct vhost_scsi_target) |
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/* Changing this breaks userspace. */ |
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#define VHOST_SCSI_GET_ABI_VERSION _IOW(VHOST_VIRTIO, 0x42, int) |
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/* Set and get the events missed flag */ |
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#define VHOST_SCSI_SET_EVENTS_MISSED _IOW(VHOST_VIRTIO, 0x43, __u32) |
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#define VHOST_SCSI_GET_EVENTS_MISSED _IOW(VHOST_VIRTIO, 0x44, __u32) |
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/* VHOST_VSOCK specific defines */ |
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#define VHOST_VSOCK_SET_GUEST_CID _IOW(VHOST_VIRTIO, 0x60, __u64) |
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#define VHOST_VSOCK_SET_RUNNING _IOW(VHOST_VIRTIO, 0x61, int) |
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/* VHOST_VDPA specific defines */ |
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/* Get the device id. The device ids follow the same definition of |
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* the device id defined in virtio-spec. |
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*/ |
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#define VHOST_VDPA_GET_DEVICE_ID _IOR(VHOST_VIRTIO, 0x70, __u32) |
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/* Get and set the status. The status bits follow the same definition |
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* of the device status defined in virtio-spec. |
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*/ |
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#define VHOST_VDPA_GET_STATUS _IOR(VHOST_VIRTIO, 0x71, __u8) |
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#define VHOST_VDPA_SET_STATUS _IOW(VHOST_VIRTIO, 0x72, __u8) |
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/* Get and set the device config. The device config follows the same |
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* definition of the device config defined in virtio-spec. |
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*/ |
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#define VHOST_VDPA_GET_CONFIG _IOR(VHOST_VIRTIO, 0x73, \ |
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struct vhost_vdpa_config) |
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#define VHOST_VDPA_SET_CONFIG _IOW(VHOST_VIRTIO, 0x74, \ |
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struct vhost_vdpa_config) |
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/* Enable/disable the ring. */ |
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#define VHOST_VDPA_SET_VRING_ENABLE _IOW(VHOST_VIRTIO, 0x75, \ |
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struct vhost_vring_state) |
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/* Get the max ring size. */ |
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#define VHOST_VDPA_GET_VRING_NUM _IOR(VHOST_VIRTIO, 0x76, __u16) |
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/* Set event fd for config interrupt*/ |
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#define VHOST_VDPA_SET_CONFIG_CALL _IOW(VHOST_VIRTIO, 0x77, int) |
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/* Get the valid iova range */ |
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#define VHOST_VDPA_GET_IOVA_RANGE _IOR(VHOST_VIRTIO, 0x78, \ |
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struct vhost_vdpa_iova_range) |
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#endif
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