hw/hyperv/vmbus.h

2  * QEMU Hyper-V VMBus
4  * Copyright (c) 2017-2018 Virtuozzo International GmbH.
7  * See the COPYING file in the top-level directory.
15 #include "hw/qdev-core.h"
17 #include "hw/hyperv/vmbus-proto.h"
21 #define TYPE_VMBUS_DEVICE "vmbus-dev"
30  * Object wrapping a GPADL -- GPA Descriptor List -- an array of guest physical
31  * pages, to be used for various buffers shared between the host and the guest.
35  * VMBus channel -- a pair of ring buffers for either direction, placed within
64      * Device-specific actions to complete the otherwise successful process of
66      * Return 0 on success, -errno on failure.
70      * Device-specific actions to perform before closing a channel.
75      * side, when there's work to do with the data in the channel ring buffers.
91  * A unit of work parsed out of a message in the receive (i.e. guest->host)
111  * Notify (on guest's behalf) the host side of the channel that there's data in
117  * Reserve space for a packet in the send (i.e. host->guest) ringbuffer.  If
118  * there isn't enough room, indicate that to the guest, to be notified when it
127  * Send a packet to the guest.  The space for the packet MUST be reserved
131  * The ringbuffer indices are updated on success, and the guest is signaled if
153  * Peek at the receive (i.e. guest->host) ring buffer and extract a unit of
154  * work (a device-specific subclass of VMBusChanReq) from a packet if there's
173  * and thus complete the reception of a series of packets.  Notify guest if