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

subsys.c (2071B)

      1/*
      2 * QEMU NVM Express Subsystem: nvme-subsys
      3 *
      4 * Copyright (c) 2021 Minwoo Im <minwoo.im.dev@gmail.com>
      5 *
      6 * This code is licensed under the GNU GPL v2.  Refer COPYING.
      7 */
      8
      9#include "qemu/osdep.h"
     10#include "qapi/error.h"
     11
     12#include "nvme.h"
     13
     14int nvme_subsys_register_ctrl(NvmeCtrl *n, Error **errp)
     15{
     16    NvmeSubsystem *subsys = n->subsys;
     17    int cntlid;
     18
     19    for (cntlid = 0; cntlid < ARRAY_SIZE(subsys->ctrls); cntlid++) {
     20        if (!subsys->ctrls[cntlid]) {
     21            break;
     22        }
     23    }
     24
     25    if (cntlid == ARRAY_SIZE(subsys->ctrls)) {
     26        error_setg(errp, "no more free controller id");
     27        return -1;
     28    }
     29
     30    subsys->ctrls[cntlid] = n;
     31
     32    return cntlid;
     33}
     34
     35void nvme_subsys_unregister_ctrl(NvmeSubsystem *subsys, NvmeCtrl *n)
     36{
     37    subsys->ctrls[n->cntlid] = NULL;
     38}
     39
     40static void nvme_subsys_setup(NvmeSubsystem *subsys)
     41{
     42    const char *nqn = subsys->params.nqn ?
     43        subsys->params.nqn : subsys->parent_obj.id;
     44
     45    snprintf((char *)subsys->subnqn, sizeof(subsys->subnqn),
     46             "nqn.2019-08.org.qemu:%s", nqn);
     47}
     48
     49static void nvme_subsys_realize(DeviceState *dev, Error **errp)
     50{
     51    NvmeSubsystem *subsys = NVME_SUBSYS(dev);
     52
     53    qbus_init(&subsys->bus, sizeof(NvmeBus), TYPE_NVME_BUS, dev, dev->id);
     54
     55    nvme_subsys_setup(subsys);
     56}
     57
     58static Property nvme_subsystem_props[] = {
     59    DEFINE_PROP_STRING("nqn", NvmeSubsystem, params.nqn),
     60    DEFINE_PROP_END_OF_LIST(),
     61};
     62
     63static void nvme_subsys_class_init(ObjectClass *oc, void *data)
     64{
     65    DeviceClass *dc = DEVICE_CLASS(oc);
     66
     67    set_bit(DEVICE_CATEGORY_STORAGE, dc->categories);
     68
     69    dc->realize = nvme_subsys_realize;
     70    dc->desc = "Virtual NVMe subsystem";
     71    dc->hotpluggable = false;
     72
     73    device_class_set_props(dc, nvme_subsystem_props);
     74}
     75
     76static const TypeInfo nvme_subsys_info = {
     77    .name = TYPE_NVME_SUBSYS,
     78    .parent = TYPE_DEVICE,
     79    .class_init = nvme_subsys_class_init,
     80    .instance_size = sizeof(NvmeSubsystem),
     81};
     82
     83static void nvme_subsys_register_types(void)
     84{
     85    type_register_static(&nvme_subsys_info);
     86}
     87
     88type_init(nvme_subsys_register_types)