cachepc-qemu

Fork of AMDESE/qemu with changes for cachepc side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-qemu
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virtio-rng.c (3517B)

      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-rng.h"
     24
     25/* virtio-rng-device */
     26static void *qvirtio_rng_get_driver(QVirtioRng *v_rng,
     27                                    const char *interface)
     28{
     29    if (!g_strcmp0(interface, "virtio-rng")) {
     30        return v_rng;
     31    }
     32    if (!g_strcmp0(interface, "virtio")) {
     33        return v_rng->vdev;
     34    }
     35
     36    fprintf(stderr, "%s not present in virtio-rng-device\n", interface);
     37    g_assert_not_reached();
     38}
     39
     40static void *qvirtio_rng_device_get_driver(void *object,
     41                                           const char *interface)
     42{
     43    QVirtioRngDevice *v_rng = object;
     44    return qvirtio_rng_get_driver(&v_rng->rng, interface);
     45}
     46
     47static void *virtio_rng_device_create(void *virtio_dev,
     48                                      QGuestAllocator *t_alloc,
     49                                      void *addr)
     50{
     51    QVirtioRngDevice *virtio_rdevice = g_new0(QVirtioRngDevice, 1);
     52    QVirtioRng *interface = &virtio_rdevice->rng;
     53
     54    interface->vdev = virtio_dev;
     55
     56    virtio_rdevice->obj.get_driver = qvirtio_rng_device_get_driver;
     57
     58    return &virtio_rdevice->obj;
     59}
     60
     61/* virtio-rng-pci */
     62static void *qvirtio_rng_pci_get_driver(void *object, const char *interface)
     63{
     64    QVirtioRngPCI *v_rng = object;
     65    if (!g_strcmp0(interface, "pci-device")) {
     66        return v_rng->pci_vdev.pdev;
     67    }
     68    return qvirtio_rng_get_driver(&v_rng->rng, interface);
     69}
     70
     71static void *virtio_rng_pci_create(void *pci_bus, QGuestAllocator *t_alloc,
     72                                   void *addr)
     73{
     74    QVirtioRngPCI *virtio_rpci = g_new0(QVirtioRngPCI, 1);
     75    QVirtioRng *interface = &virtio_rpci->rng;
     76    QOSGraphObject *obj = &virtio_rpci->pci_vdev.obj;
     77
     78    virtio_pci_init(&virtio_rpci->pci_vdev, pci_bus, addr);
     79    interface->vdev = &virtio_rpci->pci_vdev.vdev;
     80
     81    obj->get_driver = qvirtio_rng_pci_get_driver;
     82
     83    return obj;
     84}
     85
     86static void virtio_rng_register_nodes(void)
     87{
     88    QPCIAddress addr = {
     89        .devfn = QPCI_DEVFN(4, 0),
     90    };
     91
     92    QOSGraphEdgeOptions opts = {
     93        .extra_device_opts = "addr=04.0",
     94    };
     95
     96    /* virtio-rng-device */
     97    qos_node_create_driver("virtio-rng-device", virtio_rng_device_create);
     98    qos_node_consumes("virtio-rng-device", "virtio-bus", NULL);
     99    qos_node_produces("virtio-rng-device", "virtio");
    100    qos_node_produces("virtio-rng-device", "virtio-rng");
    101
    102    /* virtio-rng-pci */
    103    add_qpci_address(&opts, &addr);
    104    qos_node_create_driver("virtio-rng-pci", virtio_rng_pci_create);
    105    qos_node_consumes("virtio-rng-pci", "pci-bus", &opts);
    106    qos_node_produces("virtio-rng-pci", "pci-device");
    107    qos_node_produces("virtio-rng-pci", "virtio");
    108    qos_node_produces("virtio-rng-pci", "virtio-rng");
    109}
    110
    111libqos_init(virtio_rng_register_nodes);