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-pmem-pci.c (4231B)

      1/*
      2 * Virtio PMEM PCI device
      3 *
      4 * Copyright (C) 2018-2019 Red Hat, Inc.
      5 *
      6 * Authors:
      7 *  Pankaj Gupta <pagupta@redhat.com>
      8 *  David Hildenbrand <david@redhat.com>
      9 *
     10 * This work is licensed under the terms of the GNU GPL, version 2.
     11 * See the COPYING file in the top-level directory.
     12 */
     13
     14#include "qemu/osdep.h"
     15
     16#include "virtio-pmem-pci.h"
     17#include "hw/mem/memory-device.h"
     18#include "qapi/error.h"
     19
     20static void virtio_pmem_pci_realize(VirtIOPCIProxy *vpci_dev, Error **errp)
     21{
     22    VirtIOPMEMPCI *pmem_pci = VIRTIO_PMEM_PCI(vpci_dev);
     23    DeviceState *vdev = DEVICE(&pmem_pci->vdev);
     24
     25    virtio_pci_force_virtio_1(vpci_dev);
     26    qdev_realize(vdev, BUS(&vpci_dev->bus), errp);
     27}
     28
     29static void virtio_pmem_pci_set_addr(MemoryDeviceState *md, uint64_t addr,
     30                                     Error **errp)
     31{
     32    object_property_set_uint(OBJECT(md), VIRTIO_PMEM_ADDR_PROP, addr, errp);
     33}
     34
     35static uint64_t virtio_pmem_pci_get_addr(const MemoryDeviceState *md)
     36{
     37    return object_property_get_uint(OBJECT(md), VIRTIO_PMEM_ADDR_PROP,
     38                                    &error_abort);
     39}
     40
     41static MemoryRegion *virtio_pmem_pci_get_memory_region(MemoryDeviceState *md,
     42                                                       Error **errp)
     43{
     44    VirtIOPMEMPCI *pci_pmem = VIRTIO_PMEM_PCI(md);
     45    VirtIOPMEM *pmem = VIRTIO_PMEM(&pci_pmem->vdev);
     46    VirtIOPMEMClass *vpc = VIRTIO_PMEM_GET_CLASS(pmem);
     47
     48    return vpc->get_memory_region(pmem, errp);
     49}
     50
     51static uint64_t virtio_pmem_pci_get_plugged_size(const MemoryDeviceState *md,
     52                                                 Error **errp)
     53{
     54    VirtIOPMEMPCI *pci_pmem = VIRTIO_PMEM_PCI(md);
     55    VirtIOPMEM *pmem = VIRTIO_PMEM(&pci_pmem->vdev);
     56    VirtIOPMEMClass *vpc = VIRTIO_PMEM_GET_CLASS(pmem);
     57    MemoryRegion *mr = vpc->get_memory_region(pmem, errp);
     58
     59    /* the plugged size corresponds to the region size */
     60    return mr ? memory_region_size(mr) : 0;
     61}
     62
     63static void virtio_pmem_pci_fill_device_info(const MemoryDeviceState *md,
     64                                             MemoryDeviceInfo *info)
     65{
     66    VirtioPMEMDeviceInfo *vi = g_new0(VirtioPMEMDeviceInfo, 1);
     67    VirtIOPMEMPCI *pci_pmem = VIRTIO_PMEM_PCI(md);
     68    VirtIOPMEM *pmem = VIRTIO_PMEM(&pci_pmem->vdev);
     69    VirtIOPMEMClass *vpc = VIRTIO_PMEM_GET_CLASS(pmem);
     70    DeviceState *dev = DEVICE(md);
     71
     72    if (dev->id) {
     73        vi->has_id = true;
     74        vi->id = g_strdup(dev->id);
     75    }
     76
     77    /* let the real device handle everything else */
     78    vpc->fill_device_info(pmem, vi);
     79
     80    info->u.virtio_pmem.data = vi;
     81    info->type = MEMORY_DEVICE_INFO_KIND_VIRTIO_PMEM;
     82}
     83
     84static void virtio_pmem_pci_class_init(ObjectClass *klass, void *data)
     85{
     86    DeviceClass *dc = DEVICE_CLASS(klass);
     87    VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass);
     88    PCIDeviceClass *pcidev_k = PCI_DEVICE_CLASS(klass);
     89    MemoryDeviceClass *mdc = MEMORY_DEVICE_CLASS(klass);
     90
     91    k->realize = virtio_pmem_pci_realize;
     92    set_bit(DEVICE_CATEGORY_MISC, dc->categories);
     93    pcidev_k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET;
     94    pcidev_k->device_id = PCI_DEVICE_ID_VIRTIO_PMEM;
     95    pcidev_k->revision = VIRTIO_PCI_ABI_VERSION;
     96    pcidev_k->class_id = PCI_CLASS_OTHERS;
     97
     98    mdc->get_addr = virtio_pmem_pci_get_addr;
     99    mdc->set_addr = virtio_pmem_pci_set_addr;
    100    mdc->get_plugged_size = virtio_pmem_pci_get_plugged_size;
    101    mdc->get_memory_region = virtio_pmem_pci_get_memory_region;
    102    mdc->fill_device_info = virtio_pmem_pci_fill_device_info;
    103}
    104
    105static void virtio_pmem_pci_instance_init(Object *obj)
    106{
    107    VirtIOPMEMPCI *dev = VIRTIO_PMEM_PCI(obj);
    108
    109    virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev),
    110                                TYPE_VIRTIO_PMEM);
    111}
    112
    113static const VirtioPCIDeviceTypeInfo virtio_pmem_pci_info = {
    114    .base_name             = TYPE_VIRTIO_PMEM_PCI,
    115    .generic_name          = "virtio-pmem-pci",
    116    .instance_size = sizeof(VirtIOPMEMPCI),
    117    .instance_init = virtio_pmem_pci_instance_init,
    118    .class_init    = virtio_pmem_pci_class_init,
    119    .interfaces = (InterfaceInfo[]) {
    120        { TYPE_MEMORY_DEVICE },
    121        { }
    122    },
    123};
    124
    125static void virtio_pmem_pci_register_types(void)
    126{
    127    virtio_pci_types_register(&virtio_pmem_pci_info);
    128}
    129type_init(virtio_pmem_pci_register_types)