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Diffstat (limited to 'include/asm-s390/kvm_virtio.h')
| -rw-r--r-- | include/asm-s390/kvm_virtio.h | 53 |
1 files changed, 53 insertions, 0 deletions
diff --git a/include/asm-s390/kvm_virtio.h b/include/asm-s390/kvm_virtio.h new file mode 100644 index 00000000000..5c871a990c2 --- /dev/null +++ b/include/asm-s390/kvm_virtio.h @@ -0,0 +1,53 @@ +/* + * 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 + +#endif |