cachepc-qemu

Fork of AMDESE/qemu with changes for cachepc side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-qemu
Log | Files | Refs | Submodules | LICENSE | sfeed.txt

can_host.c (3362B)

      1/*
      2 * CAN generic CAN host connection support
      3 *
      4 * Copyright (c) 2013-2014 Jin Yang
      5 * Copyright (c) 2014-2018 Pavel Pisa
      6 *
      7 * Initial development supported by Google GSoC 2013 from RTEMS project slot
      8 *
      9 * Permission is hereby granted, free of charge, to any person obtaining a copy
     10 * of this software and associated documentation files (the "Software"), to deal
     11 * in the Software without restriction, including without limitation the rights
     12 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
     13 * copies of the Software, and to permit persons to whom the Software is
     14 * furnished to do so, subject to the following conditions:
     15 *
     16 * The above copyright notice and this permission notice shall be included in
     17 * all copies or substantial portions of the Software.
     18 *
     19 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
     20 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
     21 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
     22 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
     23 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
     24 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
     25 * THE SOFTWARE.
     26 */
     27
     28#include "qemu/osdep.h"
     29#include "chardev/char.h"
     30#include "qemu/module.h"
     31#include "qemu/sockets.h"
     32#include "qapi/error.h"
     33#include "qom/object_interfaces.h"
     34#include "net/can_emu.h"
     35#include "net/can_host.h"
     36
     37struct CanBusState {
     38    Object object;
     39
     40    QTAILQ_HEAD(, CanBusClientState) clients;
     41};
     42
     43static void can_host_disconnect(CanHostState *ch)
     44{
     45    CanHostClass *chc = CAN_HOST_GET_CLASS(ch);
     46
     47    can_bus_remove_client(&ch->bus_client);
     48    chc->disconnect(ch);
     49}
     50
     51static void can_host_connect(CanHostState *ch, Error **errp)
     52{
     53    CanHostClass *chc = CAN_HOST_GET_CLASS(ch);
     54    Error *local_err = NULL;
     55
     56    if (ch->bus == NULL) {
     57        error_setg(errp, "'canbus' property not set");
     58        return;
     59    }
     60
     61    chc->connect(ch, &local_err);
     62    if (local_err) {
     63        error_propagate(errp, local_err);
     64        return;
     65    }
     66
     67    can_bus_insert_client(ch->bus, &ch->bus_client);
     68}
     69
     70static void can_host_unparent(Object *obj)
     71{
     72    can_host_disconnect(CAN_HOST(obj));
     73}
     74
     75static void can_host_complete(UserCreatable *uc, Error **errp)
     76{
     77    can_host_connect(CAN_HOST(uc), errp);
     78}
     79
     80static void can_host_class_init(ObjectClass *klass,
     81                                void *class_data G_GNUC_UNUSED)
     82{
     83    UserCreatableClass *uc_klass = USER_CREATABLE_CLASS(klass);
     84
     85    object_class_property_add_link(klass, "canbus", TYPE_CAN_BUS,
     86                                   offsetof(CanHostState, bus),
     87                                   object_property_allow_set_link,
     88                                   OBJ_PROP_LINK_STRONG);
     89
     90    klass->unparent = can_host_unparent;
     91    uc_klass->complete = can_host_complete;
     92}
     93
     94static const TypeInfo can_host_info = {
     95    .parent = TYPE_OBJECT,
     96    .name = TYPE_CAN_HOST,
     97    .instance_size = sizeof(CanHostState),
     98    .class_size = sizeof(CanHostClass),
     99    .abstract = true,
    100    .class_init = can_host_class_init,
    101    .interfaces = (InterfaceInfo[]) {
    102        { TYPE_USER_CREATABLE },
    103        { }
    104    }
    105};
    106
    107static void can_host_register_types(void)
    108{
    109    type_register_static(&can_host_info);
    110}
    111
    112type_init(can_host_register_types);