Linux Kernel  3.7.1
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kvm_virtio.h
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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 <[email protected]>
11  */
12 
13 #ifndef __KVM_S390_VIRTIO_H
14 #define __KVM_S390_VIRTIO_H
15 
16 #include <linux/types.h>
17 
19  /* The device type: console, network, disk etc. Type 0 terminates. */
21  /* The number of virtqueues (first in config array) */
23  /*
24  * The number of bytes of feature bits. Multiply by 2: one for host
25  * features and one for guest acknowledgements.
26  */
28  /* The number of bytes of the config array after virtqueues. */
30  /* A status byte, written by the Guest. */
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 */
42  /* The address of the virtio ring */
44  /* The number of entries in the virtio_ring */
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