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

virtio-bus.h (6180B)

      1/*
      2 * VirtioBus
      3 *
      4 *  Copyright (C) 2012 : GreenSocs Ltd
      5 *      http://www.greensocs.com/ , email: info@greensocs.com
      6 *
      7 *  Developed by :
      8 *  Frederic Konrad   <fred.konrad@greensocs.com>
      9 *
     10 * This program is free software; you can redistribute it and/or modify
     11 * it under the terms of the GNU General Public License as published by
     12 * the Free Software Foundation, either version 2 of the License, or
     13 * (at your option) any later version.
     14 *
     15 * This program is distributed in the hope that it will be useful,
     16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
     17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
     18 * GNU General Public License for more details.
     19 *
     20 * You should have received a copy of the GNU General Public License along
     21 * with this program; if not, see <http://www.gnu.org/licenses/>.
     22 *
     23 */
     24
     25#ifndef VIRTIO_BUS_H
     26#define VIRTIO_BUS_H
     27
     28#include "hw/qdev-core.h"
     29#include "hw/virtio/virtio.h"
     30#include "qom/object.h"
     31
     32#define TYPE_VIRTIO_BUS "virtio-bus"
     33typedef struct VirtioBusClass VirtioBusClass;
     34typedef struct VirtioBusState VirtioBusState;
     35DECLARE_OBJ_CHECKERS(VirtioBusState, VirtioBusClass,
     36                     VIRTIO_BUS, TYPE_VIRTIO_BUS)
     37
     38
     39struct VirtioBusClass {
     40    /* This is what a VirtioBus must implement */
     41    BusClass parent;
     42    void (*notify)(DeviceState *d, uint16_t vector);
     43    void (*save_config)(DeviceState *d, QEMUFile *f);
     44    void (*save_queue)(DeviceState *d, int n, QEMUFile *f);
     45    void (*save_extra_state)(DeviceState *d, QEMUFile *f);
     46    int (*load_config)(DeviceState *d, QEMUFile *f);
     47    int (*load_queue)(DeviceState *d, int n, QEMUFile *f);
     48    int (*load_done)(DeviceState *d, QEMUFile *f);
     49    int (*load_extra_state)(DeviceState *d, QEMUFile *f);
     50    bool (*has_extra_state)(DeviceState *d);
     51    bool (*query_guest_notifiers)(DeviceState *d);
     52    int (*set_guest_notifiers)(DeviceState *d, int nvqs, bool assign);
     53    int (*set_host_notifier_mr)(DeviceState *d, int n,
     54                                MemoryRegion *mr, bool assign);
     55    void (*vmstate_change)(DeviceState *d, bool running);
     56    /*
     57     * Expose the features the transport layer supports before
     58     * the negotiation takes place.
     59     */
     60    void (*pre_plugged)(DeviceState *d, Error **errp);
     61    /*
     62     * transport independent init function.
     63     * This is called by virtio-bus just after the device is plugged.
     64     */
     65    void (*device_plugged)(DeviceState *d, Error **errp);
     66    /*
     67     * transport independent exit function.
     68     * This is called by virtio-bus just before the device is unplugged.
     69     */
     70    void (*device_unplugged)(DeviceState *d);
     71    int (*query_nvectors)(DeviceState *d);
     72    /*
     73     * ioeventfd handling: if the transport implements ioeventfd_assign,
     74     * it must implement ioeventfd_enabled as well.
     75     */
     76    /* Returns true if the ioeventfd is enabled for the device. */
     77    bool (*ioeventfd_enabled)(DeviceState *d);
     78    /*
     79     * Assigns/deassigns the ioeventfd backing for the transport on
     80     * the device for queue number n. Returns an error value on
     81     * failure.
     82     */
     83    int (*ioeventfd_assign)(DeviceState *d, EventNotifier *notifier,
     84                            int n, bool assign);
     85    /*
     86     * Whether queue number n is enabled.
     87     */
     88    bool (*queue_enabled)(DeviceState *d, int n);
     89    /*
     90     * Does the transport have variable vring alignment?
     91     * (ie can it ever call virtio_queue_set_align()?)
     92     * Note that changing this will break migration for this transport.
     93     */
     94    bool has_variable_vring_alignment;
     95    AddressSpace *(*get_dma_as)(DeviceState *d);
     96    bool (*iommu_enabled)(DeviceState *d);
     97};
     98
     99struct VirtioBusState {
    100    BusState parent_obj;
    101
    102    /*
    103     * Set if ioeventfd has been started.
    104     */
    105    bool ioeventfd_started;
    106
    107    /*
    108     * Set if ioeventfd has been grabbed by vhost.  When ioeventfd
    109     * is grabbed by vhost, we track its started/stopped state (which
    110     * depends in turn on the virtio status register), but do not
    111     * register a handler for the ioeventfd.  When ioeventfd is
    112     * released, if ioeventfd_started is true we finally register
    113     * the handler so that QEMU's device model can use ioeventfd.
    114     */
    115    int ioeventfd_grabbed;
    116};
    117
    118void virtio_bus_device_plugged(VirtIODevice *vdev, Error **errp);
    119void virtio_bus_reset(VirtioBusState *bus);
    120void virtio_bus_device_unplugged(VirtIODevice *bus);
    121/* Get the device id of the plugged device. */
    122uint16_t virtio_bus_get_vdev_id(VirtioBusState *bus);
    123/* Get the config_len field of the plugged device. */
    124size_t virtio_bus_get_vdev_config_len(VirtioBusState *bus);
    125/* Get bad features of the plugged device. */
    126uint32_t virtio_bus_get_vdev_bad_features(VirtioBusState *bus);
    127/* Get config of the plugged device. */
    128void virtio_bus_get_vdev_config(VirtioBusState *bus, uint8_t *config);
    129/* Set config of the plugged device. */
    130void virtio_bus_set_vdev_config(VirtioBusState *bus, uint8_t *config);
    131
    132static inline VirtIODevice *virtio_bus_get_device(VirtioBusState *bus)
    133{
    134    BusState *qbus = &bus->parent_obj;
    135    BusChild *kid = QTAILQ_FIRST(&qbus->children);
    136    DeviceState *qdev = kid ? kid->child : NULL;
    137
    138    /* This is used on the data path, the cast is guaranteed
    139     * to succeed by the qdev machinery.
    140     */
    141    return (VirtIODevice *)qdev;
    142}
    143
    144/* Return whether the proxy allows ioeventfd.  */
    145bool virtio_bus_ioeventfd_enabled(VirtioBusState *bus);
    146/* Start the ioeventfd. */
    147int virtio_bus_start_ioeventfd(VirtioBusState *bus);
    148/* Stop the ioeventfd. */
    149void virtio_bus_stop_ioeventfd(VirtioBusState *bus);
    150/* Tell the bus that vhost is grabbing the ioeventfd. */
    151int virtio_bus_grab_ioeventfd(VirtioBusState *bus);
    152/* bus that vhost is not using the ioeventfd anymore. */
    153void virtio_bus_release_ioeventfd(VirtioBusState *bus);
    154/* Switch from/to the generic ioeventfd handler */
    155int virtio_bus_set_host_notifier(VirtioBusState *bus, int n, bool assign);
    156/* Tell the bus that the ioeventfd handler is no longer required. */
    157void virtio_bus_cleanup_host_notifier(VirtioBusState *bus, int n);
    158/* Whether the IOMMU is enabled for this device */
    159bool virtio_bus_device_iommu_enabled(VirtIODevice *vdev);
    160#endif /* VIRTIO_BUS_H */