| Christian Borntraeger | e976a2b | 2008-03-25 18:47:46 +0100 | [diff] [blame] | 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 | |
| 53 | #endif |