diff options
Diffstat (limited to 'include/standard-headers/asm-s390/kvm_virtio.h')
| -rw-r--r-- | include/standard-headers/asm-s390/kvm_virtio.h | 64 |
1 files changed, 64 insertions, 0 deletions
diff --git a/include/standard-headers/asm-s390/kvm_virtio.h b/include/standard-headers/asm-s390/kvm_virtio.h new file mode 100644 index 0000000000..daad3249d2 --- /dev/null +++ b/include/standard-headers/asm-s390/kvm_virtio.h @@ -0,0 +1,64 @@ +/* + * 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 "standard-headers/linux/types.h" + +struct kvm_device_desc { + /* The device type: console, network, disk etc. Type 0 terminates. */ + uint8_t type; + /* The number of virtqueues (first in config array) */ + uint8_t num_vq; + /* + * The number of bytes of feature bits. Multiply by 2: one for host + * features and one for guest acknowledgements. + */ + uint8_t feature_len; + /* The number of bytes of the config array after virtqueues. */ + uint8_t config_len; + /* A status byte, written by the Guest. */ + uint8_t status; + uint8_t 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 */ + uint64_t token; + /* The address of the virtio ring */ + uint64_t address; + /* The number of entries in the virtio_ring */ + uint16_t 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 |