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e2be04c7f9
Many user space API headers have licensing information, which is either
incomplete, badly formatted or just a shorthand for referring to the
license under which the file is supposed to be. This makes it hard for
compliance tools to determine the correct license.
Update these files with an SPDX license identifier. The identifier was
chosen based on the license information in the file.
GPL/LGPL licensed headers get the matching GPL/LGPL SPDX license
identifier with the added 'WITH Linux-syscall-note' exception, which is
the officially assigned exception identifier for the kernel syscall
exception:
NOTE! This copyright does *not* cover user programs that use kernel
services by normal system calls - this is merely considered normal use
of the kernel, and does *not* fall under the heading of "derived work".
This exception makes it possible to include GPL headers into non GPL
code, without confusing license compliance tools.
Headers which have either explicit dual licensing or are just licensed
under a non GPL license are updated with the corresponding SPDX
identifier and the GPLv2 with syscall exception identifier. The format
is:
((GPL-2.0 WITH Linux-syscall-note) OR SPDX-ID-OF-OTHER-LICENSE)
SPDX license identifiers are a legally binding shorthand, which can be
used instead of the full boiler plate text. The update does not remove
existing license information as this has to be done on a case by case
basis and the copyright holders might have to be consulted. This will
happen in a separate step.
This patch is based on work done by Thomas Gleixner and Kate Stewart and
Philippe Ombredanne. See the previous patch in this series for the
methodology of how this patch was researched.
Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org>
Reviewed-by: Philippe Ombredanne <pombredanne@nexb.com>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
66 lines
1.8 KiB
C
66 lines
1.8 KiB
C
/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
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/*
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* definition for virtio for kvm on s390
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*
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* Copyright IBM Corp. 2008
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License (version 2 only)
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* as published by the Free Software Foundation.
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*
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* Author(s): Christian Borntraeger <borntraeger@de.ibm.com>
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*/
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#ifndef __KVM_S390_VIRTIO_H
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#define __KVM_S390_VIRTIO_H
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#include <linux/types.h>
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struct kvm_device_desc {
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/* The device type: console, network, disk etc. Type 0 terminates. */
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__u8 type;
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/* The number of virtqueues (first in config array) */
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__u8 num_vq;
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/*
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* The number of bytes of feature bits. Multiply by 2: one for host
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* features and one for guest acknowledgements.
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*/
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__u8 feature_len;
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/* The number of bytes of the config array after virtqueues. */
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__u8 config_len;
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/* A status byte, written by the Guest. */
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__u8 status;
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__u8 config[0];
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};
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/*
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* This is how we expect the device configuration field for a virtqueue
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* to be laid out in config space.
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*/
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struct kvm_vqconfig {
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/* The token returned with an interrupt. Set by the guest */
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__u64 token;
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/* The address of the virtio ring */
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__u64 address;
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/* The number of entries in the virtio_ring */
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__u16 num;
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};
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#define KVM_S390_VIRTIO_NOTIFY 0
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#define KVM_S390_VIRTIO_RESET 1
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#define KVM_S390_VIRTIO_SET_STATUS 2
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/* The alignment to use between consumer and producer parts of vring.
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* This is pagesize for historical reasons. */
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#define KVM_S390_VIRTIO_RING_ALIGN 4096
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/* These values are supposed to be in ext_params on an interrupt */
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#define VIRTIO_PARAM_MASK 0xff
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#define VIRTIO_PARAM_VRING_INTERRUPT 0x0
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#define VIRTIO_PARAM_CONFIG_CHANGED 0x1
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#define VIRTIO_PARAM_DEV_ADD 0x2
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#endif
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