vmbus: vmbus implementation
Add the VMBus infrastructure -- bus, devices, root bridge, vmbus state
machine, vmbus channel interactions, etc.
VMBus is a collection of technologies. At its lowest layer, it's a message
passing and signaling mechanism, allowing efficient passing of messages to and
from guest VMs. A layer higher, it's a mechanism for defining channels of
communication, where each channel is tagged with a type (which implies a
protocol) and a instance ID. A layer higher than that, it's a bus driver,
serving as the basis of device enumeration within a VM, where a channel can
optionally be exposed as a paravirtual device. When a server-side (paravirtual
back-end) component wishes to offer a channel to a guest VM, it does so by
specifying a channel type, a mode, and an instance ID. VMBus then exposes this
in the guest.
More information about VMBus can be found in the file
vmbuskernelmodeclientlibapi.h in Microsoft's WDK.
TODO:
- split into smaller palatable pieces
- more comments
- check and handle corner cases
Kudos to Evgeny Yakovlev (formerly eyakovlev@virtuozzo.com) and Andrey
Smetatin (formerly asmetanin@virtuozzo.com) for research and
prototyping.
Signed-off-by: Roman Kagan <rkagan@virtuozzo.com>
Signed-off-by: Maciej S. Szmigiero <maciej.szmigiero@oracle.com>
Signed-off-by: Jon Doron <arilou@gmail.com>
Message-Id: <20200424123444.3481728-4-arilou@gmail.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2020-04-24 15:34:41 +03:00
|
|
|
/*
|
|
|
|
|
* QEMU Hyper-V VMBus root bridge
|
|
|
|
|
*
|
|
|
|
|
* Copyright (c) 2017-2018 Virtuozzo International GmbH.
|
|
|
|
|
*
|
|
|
|
|
* This work is licensed under the terms of the GNU GPL, version 2 or later.
|
|
|
|
|
* See the COPYING file in the top-level directory.
|
|
|
|
|
*/
|
|
|
|
|
|
|
|
|
|
#ifndef HW_HYPERV_VMBUS_BRIDGE_H
|
|
|
|
|
#define HW_HYPERV_VMBUS_BRIDGE_H
|
|
|
|
|
|
|
|
|
|
#include "hw/sysbus.h"
|
|
|
|
|
|
|
|
|
|
#define TYPE_VMBUS_BRIDGE "vmbus-bridge"
|
|
|
|
|
|
|
|
|
|
typedef struct VMBus VMBus;
|
|
|
|
|
|
|
|
|
|
typedef struct VMBusBridge {
|
|
|
|
|
SysBusDevice parent_obj;
|
|
|
|
|
|
2020-04-24 15:34:43 +03:00
|
|
|
uint8_t irq0;
|
|
|
|
|
uint8_t irq1;
|
|
|
|
|
|
vmbus: vmbus implementation
Add the VMBus infrastructure -- bus, devices, root bridge, vmbus state
machine, vmbus channel interactions, etc.
VMBus is a collection of technologies. At its lowest layer, it's a message
passing and signaling mechanism, allowing efficient passing of messages to and
from guest VMs. A layer higher, it's a mechanism for defining channels of
communication, where each channel is tagged with a type (which implies a
protocol) and a instance ID. A layer higher than that, it's a bus driver,
serving as the basis of device enumeration within a VM, where a channel can
optionally be exposed as a paravirtual device. When a server-side (paravirtual
back-end) component wishes to offer a channel to a guest VM, it does so by
specifying a channel type, a mode, and an instance ID. VMBus then exposes this
in the guest.
More information about VMBus can be found in the file
vmbuskernelmodeclientlibapi.h in Microsoft's WDK.
TODO:
- split into smaller palatable pieces
- more comments
- check and handle corner cases
Kudos to Evgeny Yakovlev (formerly eyakovlev@virtuozzo.com) and Andrey
Smetatin (formerly asmetanin@virtuozzo.com) for research and
prototyping.
Signed-off-by: Roman Kagan <rkagan@virtuozzo.com>
Signed-off-by: Maciej S. Szmigiero <maciej.szmigiero@oracle.com>
Signed-off-by: Jon Doron <arilou@gmail.com>
Message-Id: <20200424123444.3481728-4-arilou@gmail.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2020-04-24 15:34:41 +03:00
|
|
|
VMBus *bus;
|
|
|
|
|
} VMBusBridge;
|
|
|
|
|
|
|
|
|
|
#define VMBUS_BRIDGE(obj) OBJECT_CHECK(VMBusBridge, (obj), TYPE_VMBUS_BRIDGE)
|
|
|
|
|
|
|
|
|
|
static inline VMBusBridge *vmbus_bridge_find(void)
|
|
|
|
|
{
|
|
|
|
|
return VMBUS_BRIDGE(object_resolve_path_type("", TYPE_VMBUS_BRIDGE, NULL));
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
#endif
|