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

virtio-balloon.c (3813B)

      1/*
      2 * libqos driver framework
      3 *
      4 * Copyright (c) 2018 Emanuele Giuseppe Esposito <e.emanuelegiuseppe@gmail.com>
      5 *
      6 * This library is free software; you can redistribute it and/or
      7 * modify it under the terms of the GNU Lesser General Public
      8 * License version 2.1 as published by the Free Software Foundation.
      9 *
     10 * This library is distributed in the hope that it will be useful,
     11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
     12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
     13 * Lesser General Public License for more details.
     14 *
     15 * You should have received a copy of the GNU Lesser General Public
     16 * License along with this library; if not, see <http://www.gnu.org/licenses/>
     17 */
     18
     19#include "qemu/osdep.h"
     20#include "libqtest.h"
     21#include "qemu/module.h"
     22#include "qgraph.h"
     23#include "virtio-balloon.h"
     24
     25/* virtio-balloon-device */
     26static void *qvirtio_balloon_get_driver(QVirtioBalloon *v_balloon,
     27                                        const char *interface)
     28{
     29    if (!g_strcmp0(interface, "virtio-balloon")) {
     30        return v_balloon;
     31    }
     32    if (!g_strcmp0(interface, "virtio")) {
     33        return v_balloon->vdev;
     34    }
     35
     36    fprintf(stderr, "%s not present in virtio-balloon-device\n", interface);
     37    g_assert_not_reached();
     38}
     39
     40static void *qvirtio_balloon_device_get_driver(void *object,
     41                                               const char *interface)
     42{
     43    QVirtioBalloonDevice *v_balloon = object;
     44    return qvirtio_balloon_get_driver(&v_balloon->balloon, interface);
     45}
     46
     47static void *virtio_balloon_device_create(void *virtio_dev,
     48                                          QGuestAllocator *t_alloc,
     49                                          void *addr)
     50{
     51    QVirtioBalloonDevice *virtio_bdevice = g_new0(QVirtioBalloonDevice, 1);
     52    QVirtioBalloon *interface = &virtio_bdevice->balloon;
     53
     54    interface->vdev = virtio_dev;
     55
     56    virtio_bdevice->obj.get_driver = qvirtio_balloon_device_get_driver;
     57
     58    return &virtio_bdevice->obj;
     59}
     60
     61/* virtio-balloon-pci */
     62static void *qvirtio_balloon_pci_get_driver(void *object,
     63                                            const char *interface)
     64{
     65    QVirtioBalloonPCI *v_balloon = object;
     66    if (!g_strcmp0(interface, "pci-device")) {
     67        return v_balloon->pci_vdev.pdev;
     68    }
     69    return qvirtio_balloon_get_driver(&v_balloon->balloon, interface);
     70}
     71
     72static void *virtio_balloon_pci_create(void *pci_bus, QGuestAllocator *t_alloc,
     73                                  void *addr)
     74{
     75    QVirtioBalloonPCI *virtio_bpci = g_new0(QVirtioBalloonPCI, 1);
     76    QVirtioBalloon *interface = &virtio_bpci->balloon;
     77    QOSGraphObject *obj = &virtio_bpci->pci_vdev.obj;
     78
     79
     80    virtio_pci_init(&virtio_bpci->pci_vdev, pci_bus, addr);
     81    interface->vdev = &virtio_bpci->pci_vdev.vdev;
     82
     83    obj->get_driver = qvirtio_balloon_pci_get_driver;
     84
     85    return obj;
     86}
     87
     88static void virtio_balloon_register_nodes(void)
     89{
     90    QPCIAddress addr = {
     91        .devfn = QPCI_DEVFN(4, 0),
     92    };
     93
     94    QOSGraphEdgeOptions opts = {
     95        .extra_device_opts = "addr=04.0",
     96    };
     97
     98    /* virtio-balloon-device */
     99    qos_node_create_driver("virtio-balloon-device",
    100                            virtio_balloon_device_create);
    101    qos_node_consumes("virtio-balloon-device", "virtio-bus", NULL);
    102    qos_node_produces("virtio-balloon-device", "virtio");
    103    qos_node_produces("virtio-balloon-device", "virtio-balloon");
    104
    105    /* virtio-balloon-pci */
    106    add_qpci_address(&opts, &addr);
    107    qos_node_create_driver("virtio-balloon-pci", virtio_balloon_pci_create);
    108    qos_node_consumes("virtio-balloon-pci", "pci-bus", &opts);
    109    qos_node_produces("virtio-balloon-pci", "pci-device");
    110    qos_node_produces("virtio-balloon-pci", "virtio");
    111    qos_node_produces("virtio-balloon-pci", "virtio-balloon");
    112}
    113
    114libqos_init(virtio_balloon_register_nodes);