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-blk.c (3941B)

      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 "standard-headers/linux/virtio_blk.h"
     23#include "qgraph.h"
     24#include "virtio-blk.h"
     25
     26#define PCI_SLOT                0x04
     27#define PCI_FN                  0x00
     28
     29/* virtio-blk-device */
     30static void *qvirtio_blk_get_driver(QVirtioBlk *v_blk,
     31                                    const char *interface)
     32{
     33    if (!g_strcmp0(interface, "virtio-blk")) {
     34        return v_blk;
     35    }
     36    if (!g_strcmp0(interface, "virtio")) {
     37        return v_blk->vdev;
     38    }
     39
     40    fprintf(stderr, "%s not present in virtio-blk-device\n", interface);
     41    g_assert_not_reached();
     42}
     43
     44static void *qvirtio_blk_device_get_driver(void *object,
     45                                           const char *interface)
     46{
     47    QVirtioBlkDevice *v_blk = object;
     48    return qvirtio_blk_get_driver(&v_blk->blk, interface);
     49}
     50
     51static void *virtio_blk_device_create(void *virtio_dev,
     52                                      QGuestAllocator *t_alloc,
     53                                      void *addr)
     54{
     55    QVirtioBlkDevice *virtio_blk = g_new0(QVirtioBlkDevice, 1);
     56    QVirtioBlk *interface = &virtio_blk->blk;
     57
     58    interface->vdev = virtio_dev;
     59
     60    virtio_blk->obj.get_driver = qvirtio_blk_device_get_driver;
     61
     62    return &virtio_blk->obj;
     63}
     64
     65/* virtio-blk-pci */
     66static void *qvirtio_blk_pci_get_driver(void *object, const char *interface)
     67{
     68    QVirtioBlkPCI *v_blk = object;
     69    if (!g_strcmp0(interface, "pci-device")) {
     70        return v_blk->pci_vdev.pdev;
     71    }
     72    return qvirtio_blk_get_driver(&v_blk->blk, interface);
     73}
     74
     75static void *virtio_blk_pci_create(void *pci_bus, QGuestAllocator *t_alloc,
     76                                      void *addr)
     77{
     78    QVirtioBlkPCI *virtio_blk = g_new0(QVirtioBlkPCI, 1);
     79    QVirtioBlk *interface = &virtio_blk->blk;
     80    QOSGraphObject *obj = &virtio_blk->pci_vdev.obj;
     81
     82    virtio_pci_init(&virtio_blk->pci_vdev, pci_bus, addr);
     83    interface->vdev = &virtio_blk->pci_vdev.vdev;
     84
     85    g_assert_cmphex(interface->vdev->device_type, ==, VIRTIO_ID_BLOCK);
     86
     87    obj->get_driver = qvirtio_blk_pci_get_driver;
     88
     89    return obj;
     90}
     91
     92static void virtio_blk_register_nodes(void)
     93{
     94    /* FIXME: every test using these two nodes needs to setup a
     95     * -drive,id=drive0 otherwise QEMU is not going to start.
     96     * Therefore, we do not include "produces" edge for virtio
     97     * and pci-device yet.
     98    */
     99
    100    char *arg = g_strdup_printf("id=drv0,drive=drive0,addr=%x.%x",
    101                                PCI_SLOT, PCI_FN);
    102
    103    QPCIAddress addr = {
    104        .devfn = QPCI_DEVFN(PCI_SLOT, PCI_FN),
    105    };
    106
    107    QOSGraphEdgeOptions opts = { };
    108
    109    /* virtio-blk-device */
    110    opts.extra_device_opts = "drive=drive0";
    111    qos_node_create_driver("virtio-blk-device", virtio_blk_device_create);
    112    qos_node_consumes("virtio-blk-device", "virtio-bus", &opts);
    113    qos_node_produces("virtio-blk-device", "virtio-blk");
    114
    115    /* virtio-blk-pci */
    116    opts.extra_device_opts = arg;
    117    add_qpci_address(&opts, &addr);
    118    qos_node_create_driver("virtio-blk-pci", virtio_blk_pci_create);
    119    qos_node_consumes("virtio-blk-pci", "pci-bus", &opts);
    120    qos_node_produces("virtio-blk-pci", "virtio-blk");
    121
    122    g_free(arg);
    123}
    124
    125libqos_init(virtio_blk_register_nodes);