| /* |
| * kvm_virtio.h - 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 |
