projects / linux-2.6-block.git / blame
| Commit | Line | Data |
|---|---|---|
| e976a2b9 CB |
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 | ||
| faeba830 CB |
53 | #ifdef __KERNEL__ |
| 54 | /* early virtio console setup */ | |
| ea4bfdf5 | 55 | #ifdef CONFIG_S390_GUEST |
| faeba830 CB |
56 | extern void s390_virtio_console_init(void); |
| 57 | #else | |
| 58 | static inline void s390_virtio_console_init(void) | |
| 59 | { | |
| 60 | } | |
| 61 | #endif /* CONFIG_VIRTIO_CONSOLE */ | |
| 62 | #endif /* __KERNEL__ */ | |
| e976a2b9 | 63 | #endif |