ppc/pnv: Add a HIOMAP erase command
[qemu.git] / include / hw / virtio / virtio-balloon.h
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
22 #define TYPE_VIRTIO_BALLOON "virtio-balloon-device"
23 #define VIRTIO_BALLOON(obj) \
24 OBJECT_CHECK(VirtIOBalloon, (obj), TYPE_VIRTIO_BALLOON)
25
26 #define VIRTIO_BALLOON_FREE_PAGE_HINT_CMD_ID_MIN 0x80000000
27
28 typedef struct virtio_balloon_stat VirtIOBalloonStat;
29
30 typedef struct virtio_balloon_stat_modern {
31 uint16_t tag;
32 uint8_t reserved[6];
33 uint64_t val;
34 } VirtIOBalloonStatModern;
35
36 enum 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
43 typedef struct 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 } VirtIOBalloon;
75
76 #endif