[mirror_ubuntu-bionic-kernel.git] / arch / s390 / include / asm / kvm_virtio.h

/*
 * kvm_virtio.h - 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 <linux/types.h>

struct kvm_device_desc {
	/* The device type: console, network, disk etc.  Type 0 terminates. */
	__u8 type;
	/* The number of virtqueues (first in config array) */
	__u8 num_vq;
	/*
	 * The number of bytes of feature bits.  Multiply by 2: one for host
	 * features and one for guest acknowledgements.
	 */
	__u8 feature_len;
	/* The number of bytes of the config array after virtqueues. */
	__u8 config_len;
	/* A status byte, written by the Guest. */
	__u8 status;
	__u8 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 */
	__u64 token;
	/* The address of the virtio ring */
	__u64 address;
	/* The number of entries in the virtio_ring */
	__u16 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
Commit	Line	Data
e976a2b9 CB	1	/*
	2	* kvm_virtio.h - definition for virtio for kvm on s390
	3	*
	4	* Copyright IBM Corp. 2008
	5	*
	6	* This program is free software; you can redistribute it and/or modify
	7	* it under the terms of the GNU General Public License (version 2 only)
	8	* as published by the Free Software Foundation.
	9	*
	10	* Author(s): Christian Borntraeger <borntraeger@de.ibm.com>
	11	*/
	12
	13	#ifndef __KVM_S390_VIRTIO_H
	14	#define __KVM_S390_VIRTIO_H
	15
	16	#include <linux/types.h>
	17
	18	struct kvm_device_desc {
	19	/* The device type: console, network, disk etc. Type 0 terminates. */
	20	__u8 type;
	21	/* The number of virtqueues (first in config array) */
	22	__u8 num_vq;
	23	/*
	24	* The number of bytes of feature bits. Multiply by 2: one for host
	25	* features and one for guest acknowledgements.
	26	*/
	27	__u8 feature_len;
	28	/* The number of bytes of the config array after virtqueues. */
	29	__u8 config_len;
	30	/* A status byte, written by the Guest. */
	31	__u8 status;
	32	__u8 config[0];
	33	};
	34
	35	/*
	36	* This is how we expect the device configuration field for a virtqueue
	37	* to be laid out in config space.
	38	*/
	39	struct kvm_vqconfig {
	40	/* The token returned with an interrupt. Set by the guest */
	41	__u64 token;
	42	/* The address of the virtio ring */
	43	__u64 address;
	44	/* The number of entries in the virtio_ring */
	45	__u16 num;
	46
	47	};
	48
	49	#define KVM_S390_VIRTIO_NOTIFY 0
	50	#define KVM_S390_VIRTIO_RESET 1
	51	#define KVM_S390_VIRTIO_SET_STATUS 2
	52
db405988 RR	53	/* The alignment to use between consumer and producer parts of vring.
	54	* This is pagesize for historical reasons. */
	55	#define KVM_S390_VIRTIO_RING_ALIGN 4096
	56
fc678d67 AG	57
	58	/* These values are supposed to be in ext_params on an interrupt */
	59	#define VIRTIO_PARAM_MASK 0xff
	60	#define VIRTIO_PARAM_VRING_INTERRUPT 0x0
	61	#define VIRTIO_PARAM_CONFIG_CHANGED 0x1
cefa33e2	62	#define VIRTIO_PARAM_DEV_ADD 0x2
fc678d67	63
e976a2b9	64	#endif