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

pci_ipmi_kcs.c (4426B)

      1/*
      2 * QEMU PCI IPMI KCS emulation
      3 *
      4 * Copyright (c) 2017 Corey Minyard, MontaVista Software, LLC
      5 *
      6 * Permission is hereby granted, free of charge, to any person obtaining a copy
      7 * of this software and associated documentation files (the "Software"), to deal
      8 * in the Software without restriction, including without limitation the rights
      9 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
     10 * copies of the Software, and to permit persons to whom the Software is
     11 * furnished to do so, subject to the following conditions:
     12 *
     13 * The above copyright notice and this permission notice shall be included in
     14 * all copies or substantial portions of the Software.
     15 *
     16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
     17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
     18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
     19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
     20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
     21 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
     22 * THE SOFTWARE.
     23 */
     24#include "qemu/osdep.h"
     25#include "migration/vmstate.h"
     26#include "qapi/error.h"
     27#include "hw/ipmi/ipmi_kcs.h"
     28#include "hw/pci/pci.h"
     29#include "qom/object.h"
     30
     31#define TYPE_PCI_IPMI_KCS "pci-ipmi-kcs"
     32OBJECT_DECLARE_SIMPLE_TYPE(PCIIPMIKCSDevice, PCI_IPMI_KCS)
     33
     34struct PCIIPMIKCSDevice {
     35    PCIDevice dev;
     36    IPMIKCS kcs;
     37    bool irq_enabled;
     38    uint32_t uuid;
     39};
     40
     41static void pci_ipmi_raise_irq(IPMIKCS *ik)
     42{
     43    PCIIPMIKCSDevice *pik = ik->opaque;
     44
     45    pci_set_irq(&pik->dev, true);
     46}
     47
     48static void pci_ipmi_lower_irq(IPMIKCS *ik)
     49{
     50    PCIIPMIKCSDevice *pik = ik->opaque;
     51
     52    pci_set_irq(&pik->dev, false);
     53}
     54
     55static void pci_ipmi_kcs_realize(PCIDevice *pd, Error **errp)
     56{
     57    Error *err = NULL;
     58    PCIIPMIKCSDevice *pik = PCI_IPMI_KCS(pd);
     59    IPMIInterface *ii = IPMI_INTERFACE(pd);
     60    IPMIInterfaceClass *iic = IPMI_INTERFACE_GET_CLASS(ii);
     61
     62    if (!pik->kcs.bmc) {
     63        error_setg(errp, "IPMI device requires a bmc attribute to be set");
     64        return;
     65    }
     66
     67    pik->uuid = ipmi_next_uuid();
     68
     69    pik->kcs.bmc->intf = ii;
     70    pik->kcs.opaque = pik;
     71
     72    pci_config_set_prog_interface(pd->config, 0x01); /* KCS */
     73    pci_config_set_interrupt_pin(pd->config, 0x01);
     74    pik->kcs.use_irq = 1;
     75    pik->kcs.raise_irq = pci_ipmi_raise_irq;
     76    pik->kcs.lower_irq = pci_ipmi_lower_irq;
     77
     78    iic->init(ii, 8, &err);
     79    if (err) {
     80        error_propagate(errp, err);
     81        return;
     82    }
     83    pci_register_bar(pd, 0, PCI_BASE_ADDRESS_SPACE_IO, &pik->kcs.io);
     84}
     85
     86const VMStateDescription vmstate_PCIIPMIKCSDevice = {
     87    .name = TYPE_IPMI_INTERFACE_PREFIX "pci-kcs",
     88    .version_id = 1,
     89    .minimum_version_id = 1,
     90    .fields      = (VMStateField[]) {
     91        VMSTATE_PCI_DEVICE(dev, PCIIPMIKCSDevice),
     92        VMSTATE_STRUCT(kcs, PCIIPMIKCSDevice, 1, vmstate_IPMIKCS, IPMIKCS),
     93        VMSTATE_END_OF_LIST()
     94    }
     95};
     96
     97static void pci_ipmi_kcs_instance_init(Object *obj)
     98{
     99    PCIIPMIKCSDevice *pik = PCI_IPMI_KCS(obj);
    100
    101    ipmi_bmc_find_and_link(obj, (Object **) &pik->kcs.bmc);
    102}
    103
    104static void *pci_ipmi_kcs_get_backend_data(IPMIInterface *ii)
    105{
    106    PCIIPMIKCSDevice *pik = PCI_IPMI_KCS(ii);
    107
    108    return &pik->kcs;
    109}
    110
    111static void pci_ipmi_kcs_class_init(ObjectClass *oc, void *data)
    112{
    113    DeviceClass *dc = DEVICE_CLASS(oc);
    114    PCIDeviceClass *pdc = PCI_DEVICE_CLASS(oc);
    115    IPMIInterfaceClass *iic = IPMI_INTERFACE_CLASS(oc);
    116
    117    pdc->vendor_id = PCI_VENDOR_ID_QEMU;
    118    pdc->device_id = PCI_DEVICE_ID_QEMU_IPMI;
    119    pdc->revision = 1;
    120    pdc->class_id = PCI_CLASS_SERIAL_IPMI;
    121
    122    dc->vmsd = &vmstate_PCIIPMIKCSDevice;
    123    dc->desc = "PCI IPMI KCS";
    124    pdc->realize = pci_ipmi_kcs_realize;
    125
    126    iic->get_backend_data = pci_ipmi_kcs_get_backend_data;
    127    ipmi_kcs_class_init(iic);
    128}
    129
    130static const TypeInfo pci_ipmi_kcs_info = {
    131    .name          = TYPE_PCI_IPMI_KCS,
    132    .parent        = TYPE_PCI_DEVICE,
    133    .instance_size = sizeof(PCIIPMIKCSDevice),
    134    .instance_init = pci_ipmi_kcs_instance_init,
    135    .class_init    = pci_ipmi_kcs_class_init,
    136    .interfaces = (InterfaceInfo[]) {
    137        { TYPE_IPMI_INTERFACE },
    138        { INTERFACE_CONVENTIONAL_PCI_DEVICE },
    139        { }
    140    }
    141};
    142
    143static void pci_ipmi_kcs_register_types(void)
    144{
    145    type_register_static(&pci_ipmi_kcs_info);
    146}
    147
    148type_init(pci_ipmi_kcs_register_types)