9807f75955
Signed-off-by: David Howells <dhowells@redhat.com> Acked-by: Arnd Bergmann <arnd@arndb.de> Acked-by: Thomas Gleixner <tglx@linutronix.de> Acked-by: Michael Kerrisk <mtk.manpages@gmail.com> Acked-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Acked-by: Dave Jones <davej@redhat.com>
64 lines
1.7 KiB
C
64 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 <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
|