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-balloon.h (1989B)

      1/*
      2 * Virtio Support
      3 *
      4 * Copyright IBM, Corp. 2007-2008
      5 *
      6 * Authors:
      7 *  Anthony Liguori   <aliguori@us.ibm.com>
      8 *  Rusty Russell     <rusty@rustcorp.com.au>
      9 *
     10 * This work is licensed under the terms of the GNU GPL, version 2.  See
     11 * the COPYING file in the top-level directory.
     12 *
     13 */
     14
     15#ifndef QEMU_VIRTIO_BALLOON_H
     16#define QEMU_VIRTIO_BALLOON_H
     17
     18#include "standard-headers/linux/virtio_balloon.h"
     19#include "hw/virtio/virtio.h"
     20#include "sysemu/iothread.h"
     21#include "qom/object.h"
     22
     23#define TYPE_VIRTIO_BALLOON "virtio-balloon-device"
     24OBJECT_DECLARE_SIMPLE_TYPE(VirtIOBalloon, VIRTIO_BALLOON)
     25
     26#define VIRTIO_BALLOON_FREE_PAGE_HINT_CMD_ID_MIN 0x80000000
     27
     28typedef struct virtio_balloon_stat VirtIOBalloonStat;
     29
     30typedef struct virtio_balloon_stat_modern {
     31       uint16_t tag;
     32       uint8_t reserved[6];
     33       uint64_t val;
     34} VirtIOBalloonStatModern;
     35
     36enum virtio_balloon_free_page_hint_status {
     37    FREE_PAGE_HINT_S_STOP = 0,
     38    FREE_PAGE_HINT_S_REQUESTED = 1,
     39    FREE_PAGE_HINT_S_START = 2,
     40    FREE_PAGE_HINT_S_DONE = 3,
     41};
     42
     43struct VirtIOBalloon {
     44    VirtIODevice parent_obj;
     45    VirtQueue *ivq, *dvq, *svq, *free_page_vq, *reporting_vq;
     46    uint32_t free_page_hint_status;
     47    uint32_t num_pages;
     48    uint32_t actual;
     49    uint32_t free_page_hint_cmd_id;
     50    uint64_t stats[VIRTIO_BALLOON_S_NR];
     51    VirtQueueElement *stats_vq_elem;
     52    size_t stats_vq_offset;
     53    QEMUTimer *stats_timer;
     54    IOThread *iothread;
     55    QEMUBH *free_page_bh;
     56    /*
     57     * Lock to synchronize threads to access the free page reporting related
     58     * fields (e.g. free_page_hint_status).
     59     */
     60    QemuMutex free_page_lock;
     61    QemuCond  free_page_cond;
     62    /*
     63     * Set to block iothread to continue reading free page hints as the VM is
     64     * stopped.
     65     */
     66    bool block_iothread;
     67    NotifierWithReturn free_page_hint_notify;
     68    int64_t stats_last_update;
     69    int64_t stats_poll_interval;
     70    uint32_t host_features;
     71
     72    bool qemu_4_0_config_size;
     73    uint32_t poison_val;
     74};
     75
     76#endif