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

qdev.c (10739B)

      1/*
      2 * ide bus support for qdev.
      3 *
      4 * Copyright (c) 2009 Gerd Hoffmann <kraxel@redhat.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 as published by the Free Software Foundation; either
      9 * version 2.1 of the License, or (at your option) any later version.
     10 *
     11 * This library is distributed in the hope that it will be useful,
     12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
     13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
     14 * Lesser General Public License for more details.
     15 *
     16 * You should have received a copy of the GNU Lesser General Public
     17 * License along with this library; if not, see <http://www.gnu.org/licenses/>.
     18 */
     19
     20#include "qemu/osdep.h"
     21#include "sysemu/dma.h"
     22#include "qapi/error.h"
     23#include "qapi/qapi-types-block.h"
     24#include "qemu/error-report.h"
     25#include "qemu/main-loop.h"
     26#include "qemu/module.h"
     27#include "hw/ide/internal.h"
     28#include "hw/qdev-properties.h"
     29#include "hw/qdev-properties-system.h"
     30#include "sysemu/block-backend.h"
     31#include "sysemu/blockdev.h"
     32#include "hw/block/block.h"
     33#include "sysemu/sysemu.h"
     34#include "sysemu/runstate.h"
     35#include "qapi/visitor.h"
     36
     37/* --------------------------------- */
     38
     39static char *idebus_get_fw_dev_path(DeviceState *dev);
     40static void idebus_unrealize(BusState *qdev);
     41
     42static Property ide_props[] = {
     43    DEFINE_PROP_UINT32("unit", IDEDevice, unit, -1),
     44    DEFINE_PROP_END_OF_LIST(),
     45};
     46
     47static void ide_bus_class_init(ObjectClass *klass, void *data)
     48{
     49    BusClass *k = BUS_CLASS(klass);
     50
     51    k->get_fw_dev_path = idebus_get_fw_dev_path;
     52    k->unrealize = idebus_unrealize;
     53}
     54
     55static void idebus_unrealize(BusState *bus)
     56{
     57    IDEBus *ibus = IDE_BUS(bus);
     58
     59    if (ibus->vmstate) {
     60        qemu_del_vm_change_state_handler(ibus->vmstate);
     61    }
     62}
     63
     64static const TypeInfo ide_bus_info = {
     65    .name = TYPE_IDE_BUS,
     66    .parent = TYPE_BUS,
     67    .instance_size = sizeof(IDEBus),
     68    .class_init = ide_bus_class_init,
     69};
     70
     71void ide_bus_init(IDEBus *idebus, size_t idebus_size, DeviceState *dev,
     72                 int bus_id, int max_units)
     73{
     74    qbus_init(idebus, idebus_size, TYPE_IDE_BUS, dev, NULL);
     75    idebus->bus_id = bus_id;
     76    idebus->max_units = max_units;
     77}
     78
     79static char *idebus_get_fw_dev_path(DeviceState *dev)
     80{
     81    char path[30];
     82
     83    snprintf(path, sizeof(path), "%s@%x", qdev_fw_name(dev),
     84             ((IDEBus*)dev->parent_bus)->bus_id);
     85
     86    return g_strdup(path);
     87}
     88
     89static void ide_qdev_realize(DeviceState *qdev, Error **errp)
     90{
     91    IDEDevice *dev = IDE_DEVICE(qdev);
     92    IDEDeviceClass *dc = IDE_DEVICE_GET_CLASS(dev);
     93    IDEBus *bus = DO_UPCAST(IDEBus, qbus, qdev->parent_bus);
     94
     95    if (dev->unit == -1) {
     96        dev->unit = bus->master ? 1 : 0;
     97    }
     98
     99    if (dev->unit >= bus->max_units) {
    100        error_setg(errp, "Can't create IDE unit %d, bus supports only %d units",
    101                     dev->unit, bus->max_units);
    102        return;
    103    }
    104
    105    switch (dev->unit) {
    106    case 0:
    107        if (bus->master) {
    108            error_setg(errp, "IDE unit %d is in use", dev->unit);
    109            return;
    110        }
    111        bus->master = dev;
    112        break;
    113    case 1:
    114        if (bus->slave) {
    115            error_setg(errp, "IDE unit %d is in use", dev->unit);
    116            return;
    117        }
    118        bus->slave = dev;
    119        break;
    120    default:
    121        error_setg(errp, "Invalid IDE unit %d", dev->unit);
    122        return;
    123    }
    124    dc->realize(dev, errp);
    125}
    126
    127IDEDevice *ide_create_drive(IDEBus *bus, int unit, DriveInfo *drive)
    128{
    129    DeviceState *dev;
    130
    131    dev = qdev_new(drive->media_cd ? "ide-cd" : "ide-hd");
    132    qdev_prop_set_uint32(dev, "unit", unit);
    133    qdev_prop_set_drive_err(dev, "drive", blk_by_legacy_dinfo(drive),
    134                            &error_fatal);
    135    qdev_realize_and_unref(dev, &bus->qbus, &error_fatal);
    136    return DO_UPCAST(IDEDevice, qdev, dev);
    137}
    138
    139int ide_get_geometry(BusState *bus, int unit,
    140                     int16_t *cyls, int8_t *heads, int8_t *secs)
    141{
    142    IDEState *s = &DO_UPCAST(IDEBus, qbus, bus)->ifs[unit];
    143
    144    if (s->drive_kind != IDE_HD || !s->blk) {
    145        return -1;
    146    }
    147
    148    *cyls = s->cylinders;
    149    *heads = s->heads;
    150    *secs = s->sectors;
    151    return 0;
    152}
    153
    154int ide_get_bios_chs_trans(BusState *bus, int unit)
    155{
    156    return DO_UPCAST(IDEBus, qbus, bus)->ifs[unit].chs_trans;
    157}
    158
    159/* --------------------------------- */
    160
    161typedef struct IDEDrive {
    162    IDEDevice dev;
    163} IDEDrive;
    164
    165static void ide_dev_initfn(IDEDevice *dev, IDEDriveKind kind, Error **errp)
    166{
    167    IDEBus *bus = DO_UPCAST(IDEBus, qbus, dev->qdev.parent_bus);
    168    IDEState *s = bus->ifs + dev->unit;
    169    int ret;
    170
    171    if (!dev->conf.blk) {
    172        if (kind != IDE_CD) {
    173            error_setg(errp, "No drive specified");
    174            return;
    175        } else {
    176            /* Anonymous BlockBackend for an empty drive */
    177            dev->conf.blk = blk_new(qemu_get_aio_context(), 0, BLK_PERM_ALL);
    178            ret = blk_attach_dev(dev->conf.blk, &dev->qdev);
    179            assert(ret == 0);
    180        }
    181    }
    182
    183    if (dev->conf.discard_granularity == -1) {
    184        dev->conf.discard_granularity = 512;
    185    } else if (dev->conf.discard_granularity &&
    186               dev->conf.discard_granularity != 512) {
    187        error_setg(errp, "discard_granularity must be 512 for ide");
    188        return;
    189    }
    190
    191    if (!blkconf_blocksizes(&dev->conf, errp)) {
    192        return;
    193    }
    194
    195    if (dev->conf.logical_block_size != 512) {
    196        error_setg(errp, "logical_block_size must be 512 for IDE");
    197        return;
    198    }
    199
    200    if (kind != IDE_CD) {
    201        if (!blkconf_geometry(&dev->conf, &dev->chs_trans, 65535, 16, 255,
    202                              errp)) {
    203            return;
    204        }
    205    }
    206    if (!blkconf_apply_backend_options(&dev->conf, kind == IDE_CD,
    207                                       kind != IDE_CD, errp)) {
    208        return;
    209    }
    210
    211    if (ide_init_drive(s, dev->conf.blk, kind,
    212                       dev->version, dev->serial, dev->model, dev->wwn,
    213                       dev->conf.cyls, dev->conf.heads, dev->conf.secs,
    214                       dev->chs_trans, errp) < 0) {
    215        return;
    216    }
    217
    218    if (!dev->version) {
    219        dev->version = g_strdup(s->version);
    220    }
    221    if (!dev->serial) {
    222        dev->serial = g_strdup(s->drive_serial_str);
    223    }
    224
    225    add_boot_device_path(dev->conf.bootindex, &dev->qdev,
    226                         dev->unit ? "/disk@1" : "/disk@0");
    227
    228    add_boot_device_lchs(&dev->qdev, dev->unit ? "/disk@1" : "/disk@0",
    229                         dev->conf.lcyls,
    230                         dev->conf.lheads,
    231                         dev->conf.lsecs);
    232}
    233
    234static void ide_dev_get_bootindex(Object *obj, Visitor *v, const char *name,
    235                                  void *opaque, Error **errp)
    236{
    237    IDEDevice *d = IDE_DEVICE(obj);
    238
    239    visit_type_int32(v, name, &d->conf.bootindex, errp);
    240}
    241
    242static void ide_dev_set_bootindex(Object *obj, Visitor *v, const char *name,
    243                                  void *opaque, Error **errp)
    244{
    245    IDEDevice *d = IDE_DEVICE(obj);
    246    int32_t boot_index;
    247    Error *local_err = NULL;
    248
    249    if (!visit_type_int32(v, name, &boot_index, errp)) {
    250        return;
    251    }
    252    /* check whether bootindex is present in fw_boot_order list  */
    253    check_boot_index(boot_index, &local_err);
    254    if (local_err) {
    255        goto out;
    256    }
    257    /* change bootindex to a new one */
    258    d->conf.bootindex = boot_index;
    259
    260    if (d->unit != -1) {
    261        add_boot_device_path(d->conf.bootindex, &d->qdev,
    262                             d->unit ? "/disk@1" : "/disk@0");
    263    }
    264out:
    265    error_propagate(errp, local_err);
    266}
    267
    268static void ide_dev_instance_init(Object *obj)
    269{
    270    object_property_add(obj, "bootindex", "int32",
    271                        ide_dev_get_bootindex,
    272                        ide_dev_set_bootindex, NULL, NULL);
    273    object_property_set_int(obj, "bootindex", -1, NULL);
    274}
    275
    276static void ide_hd_realize(IDEDevice *dev, Error **errp)
    277{
    278    ide_dev_initfn(dev, IDE_HD, errp);
    279}
    280
    281static void ide_cd_realize(IDEDevice *dev, Error **errp)
    282{
    283    ide_dev_initfn(dev, IDE_CD, errp);
    284}
    285
    286#define DEFINE_IDE_DEV_PROPERTIES()                     \
    287    DEFINE_BLOCK_PROPERTIES(IDEDrive, dev.conf),        \
    288    DEFINE_BLOCK_ERROR_PROPERTIES(IDEDrive, dev.conf),  \
    289    DEFINE_PROP_STRING("ver",  IDEDrive, dev.version),  \
    290    DEFINE_PROP_UINT64("wwn",  IDEDrive, dev.wwn, 0),   \
    291    DEFINE_PROP_STRING("serial",  IDEDrive, dev.serial),\
    292    DEFINE_PROP_STRING("model", IDEDrive, dev.model)
    293
    294static Property ide_hd_properties[] = {
    295    DEFINE_IDE_DEV_PROPERTIES(),
    296    DEFINE_BLOCK_CHS_PROPERTIES(IDEDrive, dev.conf),
    297    DEFINE_PROP_BIOS_CHS_TRANS("bios-chs-trans",
    298                IDEDrive, dev.chs_trans, BIOS_ATA_TRANSLATION_AUTO),
    299    DEFINE_PROP_UINT16("rotation_rate", IDEDrive, dev.rotation_rate, 0),
    300    DEFINE_PROP_END_OF_LIST(),
    301};
    302
    303static void ide_hd_class_init(ObjectClass *klass, void *data)
    304{
    305    DeviceClass *dc = DEVICE_CLASS(klass);
    306    IDEDeviceClass *k = IDE_DEVICE_CLASS(klass);
    307
    308    k->realize  = ide_hd_realize;
    309    dc->fw_name = "drive";
    310    dc->desc    = "virtual IDE disk";
    311    device_class_set_props(dc, ide_hd_properties);
    312}
    313
    314static const TypeInfo ide_hd_info = {
    315    .name          = "ide-hd",
    316    .parent        = TYPE_IDE_DEVICE,
    317    .instance_size = sizeof(IDEDrive),
    318    .class_init    = ide_hd_class_init,
    319};
    320
    321static Property ide_cd_properties[] = {
    322    DEFINE_IDE_DEV_PROPERTIES(),
    323    DEFINE_PROP_END_OF_LIST(),
    324};
    325
    326static void ide_cd_class_init(ObjectClass *klass, void *data)
    327{
    328    DeviceClass *dc = DEVICE_CLASS(klass);
    329    IDEDeviceClass *k = IDE_DEVICE_CLASS(klass);
    330
    331    k->realize  = ide_cd_realize;
    332    dc->fw_name = "drive";
    333    dc->desc    = "virtual IDE CD-ROM";
    334    device_class_set_props(dc, ide_cd_properties);
    335}
    336
    337static const TypeInfo ide_cd_info = {
    338    .name          = "ide-cd",
    339    .parent        = TYPE_IDE_DEVICE,
    340    .instance_size = sizeof(IDEDrive),
    341    .class_init    = ide_cd_class_init,
    342};
    343
    344static void ide_device_class_init(ObjectClass *klass, void *data)
    345{
    346    DeviceClass *k = DEVICE_CLASS(klass);
    347    k->realize = ide_qdev_realize;
    348    set_bit(DEVICE_CATEGORY_STORAGE, k->categories);
    349    k->bus_type = TYPE_IDE_BUS;
    350    device_class_set_props(k, ide_props);
    351}
    352
    353static const TypeInfo ide_device_type_info = {
    354    .name = TYPE_IDE_DEVICE,
    355    .parent = TYPE_DEVICE,
    356    .instance_size = sizeof(IDEDevice),
    357    .abstract = true,
    358    .class_size = sizeof(IDEDeviceClass),
    359    .class_init = ide_device_class_init,
    360    .instance_init = ide_dev_instance_init,
    361};
    362
    363static void ide_register_types(void)
    364{
    365    type_register_static(&ide_bus_info);
    366    type_register_static(&ide_hd_info);
    367    type_register_static(&ide_cd_info);
    368    type_register_static(&ide_device_type_info);
    369}
    370
    371type_init(ide_register_types)