mirror of
https://github.com/qemu/qemu.git
synced 2024-12-27 06:03:29 +08:00
65 lines
1.7 KiB
C
65 lines
1.7 KiB
C
/*
|
|
* definition for virtio for kvm on s390
|
|
*
|
|
* Copyright IBM Corp. 2008
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License (version 2 only)
|
|
* as published by the Free Software Foundation.
|
|
*
|
|
* Author(s): Christian Borntraeger <borntraeger@de.ibm.com>
|
|
*/
|
|
|
|
#ifndef __KVM_S390_VIRTIO_H
|
|
#define __KVM_S390_VIRTIO_H
|
|
|
|
#include "standard-headers/linux/types.h"
|
|
|
|
struct kvm_device_desc {
|
|
/* The device type: console, network, disk etc. Type 0 terminates. */
|
|
uint8_t type;
|
|
/* The number of virtqueues (first in config array) */
|
|
uint8_t num_vq;
|
|
/*
|
|
* The number of bytes of feature bits. Multiply by 2: one for host
|
|
* features and one for guest acknowledgements.
|
|
*/
|
|
uint8_t feature_len;
|
|
/* The number of bytes of the config array after virtqueues. */
|
|
uint8_t config_len;
|
|
/* A status byte, written by the Guest. */
|
|
uint8_t status;
|
|
uint8_t config[0];
|
|
};
|
|
|
|
/*
|
|
* This is how we expect the device configuration field for a virtqueue
|
|
* to be laid out in config space.
|
|
*/
|
|
struct kvm_vqconfig {
|
|
/* The token returned with an interrupt. Set by the guest */
|
|
uint64_t token;
|
|
/* The address of the virtio ring */
|
|
uint64_t address;
|
|
/* The number of entries in the virtio_ring */
|
|
uint16_t num;
|
|
|
|
};
|
|
|
|
#define KVM_S390_VIRTIO_NOTIFY 0
|
|
#define KVM_S390_VIRTIO_RESET 1
|
|
#define KVM_S390_VIRTIO_SET_STATUS 2
|
|
|
|
/* The alignment to use between consumer and producer parts of vring.
|
|
* This is pagesize for historical reasons. */
|
|
#define KVM_S390_VIRTIO_RING_ALIGN 4096
|
|
|
|
|
|
/* These values are supposed to be in ext_params on an interrupt */
|
|
#define VIRTIO_PARAM_MASK 0xff
|
|
#define VIRTIO_PARAM_VRING_INTERRUPT 0x0
|
|
#define VIRTIO_PARAM_CONFIG_CHANGED 0x1
|
|
#define VIRTIO_PARAM_DEV_ADD 0x2
|
|
|
|
#endif
|