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-scsi.c (3940B)

      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_ids.h"
     23#include "qgraph.h"
     24#include "virtio-scsi.h"
     25
     26/* virtio-scsi-device */
     27static void *qvirtio_scsi_get_driver(QVirtioSCSI *v_scsi,
     28                                     const char *interface)
     29{
     30    if (!g_strcmp0(interface, "virtio-scsi")) {
     31        return v_scsi;
     32    }
     33    if (!g_strcmp0(interface, "virtio")) {
     34        return v_scsi->vdev;
     35    }
     36
     37    fprintf(stderr, "%s not present in virtio-scsi-device\n", interface);
     38    g_assert_not_reached();
     39}
     40
     41static void *qvirtio_scsi_device_get_driver(void *object,
     42                                            const char *interface)
     43{
     44    QVirtioSCSIDevice *v_scsi = object;
     45    return qvirtio_scsi_get_driver(&v_scsi->scsi, interface);
     46}
     47
     48static void *virtio_scsi_device_create(void *virtio_dev,
     49                                          QGuestAllocator *t_alloc,
     50                                          void *addr)
     51{
     52    QVirtioSCSIDevice *virtio_bdevice = g_new0(QVirtioSCSIDevice, 1);
     53    QVirtioSCSI *interface = &virtio_bdevice->scsi;
     54
     55    interface->vdev = virtio_dev;
     56
     57    virtio_bdevice->obj.get_driver = qvirtio_scsi_device_get_driver;
     58
     59    return &virtio_bdevice->obj;
     60}
     61
     62/* virtio-scsi-pci */
     63static void *qvirtio_scsi_pci_get_driver(void *object,
     64                                         const char *interface)
     65{
     66    QVirtioSCSIPCI *v_scsi = object;
     67    if (!g_strcmp0(interface, "pci-device")) {
     68        return v_scsi->pci_vdev.pdev;
     69    }
     70    return qvirtio_scsi_get_driver(&v_scsi->scsi, interface);
     71}
     72
     73static void *virtio_scsi_pci_create(void *pci_bus,
     74                                    QGuestAllocator *t_alloc,
     75                                    void *addr)
     76{
     77    QVirtioSCSIPCI *virtio_spci = g_new0(QVirtioSCSIPCI, 1);
     78    QVirtioSCSI *interface = &virtio_spci->scsi;
     79    QOSGraphObject *obj = &virtio_spci->pci_vdev.obj;
     80
     81    virtio_pci_init(&virtio_spci->pci_vdev, pci_bus, addr);
     82    interface->vdev = &virtio_spci->pci_vdev.vdev;
     83
     84    g_assert_cmphex(interface->vdev->device_type, ==, VIRTIO_ID_SCSI);
     85
     86    obj->get_driver = qvirtio_scsi_pci_get_driver;
     87
     88    return obj;
     89}
     90
     91static void virtio_scsi_register_nodes(void)
     92{
     93    QPCIAddress addr = {
     94        .devfn = QPCI_DEVFN(4, 0),
     95    };
     96
     97    QOSGraphEdgeOptions opts = {
     98        .before_cmd_line = "-drive id=drv0,if=none,file=null-co://,"
     99                           "file.read-zeroes=on,format=raw",
    100        .after_cmd_line = "-device scsi-hd,bus=vs0.0,drive=drv0",
    101    };
    102
    103    /* virtio-scsi-device */
    104    opts.extra_device_opts = "id=vs0";
    105    qos_node_create_driver("virtio-scsi-device",
    106                            virtio_scsi_device_create);
    107    qos_node_consumes("virtio-scsi-device", "virtio-bus", &opts);
    108    qos_node_produces("virtio-scsi-device", "virtio-scsi");
    109
    110    /* virtio-scsi-pci */
    111    opts.extra_device_opts = "id=vs0,addr=04.0";
    112    add_qpci_address(&opts, &addr);
    113    qos_node_create_driver("virtio-scsi-pci", virtio_scsi_pci_create);
    114    qos_node_consumes("virtio-scsi-pci", "pci-bus", &opts);
    115    qos_node_produces("virtio-scsi-pci", "pci-device");
    116    qos_node_produces("virtio-scsi-pci", "virtio-scsi");
    117}
    118
    119libqos_init(virtio_scsi_register_nodes);