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

xen_pvdevice.c (4835B)

      1/* Copyright (c) Citrix Systems Inc.
      2 * All rights reserved.
      3 *
      4 * Redistribution and use in source and binary forms,
      5 * with or without modification, are permitted provided
      6 * that the following conditions are met:
      7 *
      8 * *   Redistributions of source code must retain the above
      9 *     copyright notice, this list of conditions and the
     10 *     following disclaimer.
     11 * *   Redistributions in binary form must reproduce the above
     12 *     copyright notice, this list of conditions and the
     13 *     following disclaimer in the documentation and/or other
     14 *     materials provided with the distribution.
     15 *
     16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
     17 * CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
     18 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
     19 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
     20 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
     21 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
     22 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
     23 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
     24 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     25 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
     26 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
     27 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
     28 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     29 * SUCH DAMAGE.
     30 */
     31
     32#include "qemu/osdep.h"
     33#include "qapi/error.h"
     34#include "qemu/module.h"
     35#include "hw/pci/pci.h"
     36#include "hw/qdev-properties.h"
     37#include "migration/vmstate.h"
     38#include "trace.h"
     39#include "qom/object.h"
     40
     41#define TYPE_XEN_PV_DEVICE  "xen-pvdevice"
     42
     43OBJECT_DECLARE_SIMPLE_TYPE(XenPVDevice, XEN_PV_DEVICE)
     44
     45struct XenPVDevice {
     46    /*< private >*/
     47    PCIDevice       parent_obj;
     48    /*< public >*/
     49    uint16_t        vendor_id;
     50    uint16_t        device_id;
     51    uint8_t         revision;
     52    uint32_t        size;
     53    MemoryRegion    mmio;
     54};
     55
     56static uint64_t xen_pv_mmio_read(void *opaque, hwaddr addr,
     57                                 unsigned size)
     58{
     59    trace_xen_pv_mmio_read(addr);
     60
     61    return ~(uint64_t)0;
     62}
     63
     64static void xen_pv_mmio_write(void *opaque, hwaddr addr,
     65                              uint64_t val, unsigned size)
     66{
     67    trace_xen_pv_mmio_write(addr);
     68}
     69
     70static const MemoryRegionOps xen_pv_mmio_ops = {
     71    .read = &xen_pv_mmio_read,
     72    .write = &xen_pv_mmio_write,
     73    .endianness = DEVICE_LITTLE_ENDIAN,
     74};
     75
     76static const VMStateDescription vmstate_xen_pvdevice = {
     77    .name = "xen-pvdevice",
     78    .version_id = 1,
     79    .minimum_version_id = 1,
     80    .fields = (VMStateField[]) {
     81        VMSTATE_PCI_DEVICE(parent_obj, XenPVDevice),
     82        VMSTATE_END_OF_LIST()
     83    }
     84};
     85
     86static void xen_pv_realize(PCIDevice *pci_dev, Error **errp)
     87{
     88    XenPVDevice *d = XEN_PV_DEVICE(pci_dev);
     89    uint8_t *pci_conf;
     90
     91    /* device-id property must always be supplied */
     92    if (d->device_id == 0xffff) {
     93        error_setg(errp, "Device ID invalid, it must always be supplied");
     94        return;
     95    }
     96
     97    pci_conf = pci_dev->config;
     98
     99    pci_set_word(pci_conf + PCI_VENDOR_ID, d->vendor_id);
    100    pci_set_word(pci_conf + PCI_SUBSYSTEM_VENDOR_ID, d->vendor_id);
    101    pci_set_word(pci_conf + PCI_DEVICE_ID, d->device_id);
    102    pci_set_word(pci_conf + PCI_SUBSYSTEM_ID, d->device_id);
    103    pci_set_byte(pci_conf + PCI_REVISION_ID, d->revision);
    104
    105    pci_set_word(pci_conf + PCI_COMMAND, PCI_COMMAND_MEMORY);
    106
    107    pci_config_set_prog_interface(pci_conf, 0);
    108
    109    pci_conf[PCI_INTERRUPT_PIN] = 1;
    110
    111    memory_region_init_io(&d->mmio, NULL, &xen_pv_mmio_ops, d,
    112                          "mmio", d->size);
    113
    114    pci_register_bar(pci_dev, 1, PCI_BASE_ADDRESS_MEM_PREFETCH,
    115                     &d->mmio);
    116}
    117
    118static Property xen_pv_props[] = {
    119    DEFINE_PROP_UINT16("vendor-id", XenPVDevice, vendor_id, PCI_VENDOR_ID_XEN),
    120    DEFINE_PROP_UINT16("device-id", XenPVDevice, device_id, 0xffff),
    121    DEFINE_PROP_UINT8("revision", XenPVDevice, revision, 0x01),
    122    DEFINE_PROP_UINT32("size", XenPVDevice, size, 0x400000),
    123    DEFINE_PROP_END_OF_LIST()
    124};
    125
    126static void xen_pv_class_init(ObjectClass *klass, void *data)
    127{
    128    DeviceClass *dc = DEVICE_CLASS(klass);
    129    PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
    130
    131    k->realize = xen_pv_realize;
    132    k->class_id = PCI_CLASS_SYSTEM_OTHER;
    133    dc->desc = "Xen PV Device";
    134    device_class_set_props(dc, xen_pv_props);
    135    dc->vmsd = &vmstate_xen_pvdevice;
    136}
    137
    138static const TypeInfo xen_pv_type_info = {
    139    .name          = TYPE_XEN_PV_DEVICE,
    140    .parent        = TYPE_PCI_DEVICE,
    141    .instance_size = sizeof(XenPVDevice),
    142    .class_init    = xen_pv_class_init,
    143    .interfaces = (InterfaceInfo[]) {
    144        { INTERFACE_CONVENTIONAL_PCI_DEVICE },
    145        { },
    146    },
    147};
    148
    149static void xen_pv_register_types(void)
    150{
    151    type_register_static(&xen_pv_type_info);
    152}
    153
    154type_init(xen_pv_register_types)