migration: force QEMUFile to blocking mode for outgoing migration
[qemu.git] / include / standard-headers / asm-s390 / kvm_virtio.h
1 /*
2 * 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 "standard-headers/linux/types.h"
17
18 struct kvm_device_desc {
19 /* The device type: console, network, disk etc. Type 0 terminates. */
20 uint8_t type;
21 /* The number of virtqueues (first in config array) */
22 uint8_t 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 uint8_t feature_len;
28 /* The number of bytes of the config array after virtqueues. */
29 uint8_t config_len;
30 /* A status byte, written by the Guest. */
31 uint8_t status;
32 uint8_t 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 uint64_t token;
42 /* The address of the virtio ring */
43 uint64_t address;
44 /* The number of entries in the virtio_ring */
45 uint16_t 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
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
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
62 #define VIRTIO_PARAM_DEV_ADD 0x2
63
64 #endif