Release 4.14 arch/s390/include/uapi/asm/kvm_virtio.h

/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
/*
 * 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
Overall Contributors
Person
Tokens
Prop
Commits
CommitProp
Christian Bornträger
72
75.00%
1
16.67%
Alexander Graf
17
17.71%
2
33.33%
Rusty Russell
5
5.21%
1
16.67%
Heiko Carstens
1
1.04%
1
16.67%
Greg Kroah-Hartman
1
1.04%
1
16.67%
Total
96
100.00%
6
100.00%
Directory: arch/s390/include/uapi/asm

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