Use DECLARE_*CHECKER* macros

[mirror_qemu.git] / include / hw / virtio / virtio-balloon.h

diff --git a/include/hw/virtio/virtio-balloon.h b/include/hw/virtio/virtio-balloon.h
index 35f62ac119df0fbebb28f1f75d4b7675774ae65a..0d08f496d925861bf5d640128d8ffe91989488d4 100644 (file)
--- a/include/hw/virtio/virtio-balloon.h
+++ b/include/hw/virtio/virtio-balloon.h
@@ -12,16 +12,20 @@
  *
  */
 
-#ifndef _QEMU_VIRTIO_BALLOON_H
-#define _QEMU_VIRTIO_BALLOON_H
+#ifndef QEMU_VIRTIO_BALLOON_H
+#define QEMU_VIRTIO_BALLOON_H
 
 #include "standard-headers/linux/virtio_balloon.h"
 #include "hw/virtio/virtio.h"
-#include "hw/pci/pci.h"
+#include "sysemu/iothread.h"
+#include "qom/object.h"
 
 #define TYPE_VIRTIO_BALLOON "virtio-balloon-device"
-#define VIRTIO_BALLOON(obj) \
-        OBJECT_CHECK(VirtIOBalloon, (obj), TYPE_VIRTIO_BALLOON)
+typedef struct VirtIOBalloon VirtIOBalloon;
+DECLARE_INSTANCE_CHECKER(VirtIOBalloon, VIRTIO_BALLOON,
+                         TYPE_VIRTIO_BALLOON)
+
+#define VIRTIO_BALLOON_FREE_PAGE_HINT_CMD_ID_MIN 0x80000000
 
 typedef struct virtio_balloon_stat VirtIOBalloonStat;
 
@@ -31,18 +35,44 @@ typedef struct virtio_balloon_stat_modern {
        uint64_t val;
 } VirtIOBalloonStatModern;
 
-typedef struct VirtIOBalloon {
+enum virtio_balloon_free_page_hint_status {
+    FREE_PAGE_HINT_S_STOP = 0,
+    FREE_PAGE_HINT_S_REQUESTED = 1,
+    FREE_PAGE_HINT_S_START = 2,
+    FREE_PAGE_HINT_S_DONE = 3,
+};
+
+struct VirtIOBalloon {
     VirtIODevice parent_obj;
-    VirtQueue *ivq, *dvq, *svq;
+    VirtQueue *ivq, *dvq, *svq, *free_page_vq, *reporting_vq;
+    uint32_t free_page_hint_status;
     uint32_t num_pages;
     uint32_t actual;
+    uint32_t free_page_hint_cmd_id;
     uint64_t stats[VIRTIO_BALLOON_S_NR];
     VirtQueueElement *stats_vq_elem;
     size_t stats_vq_offset;
     QEMUTimer *stats_timer;
+    IOThread *iothread;
+    QEMUBH *free_page_bh;
+    /*
+     * Lock to synchronize threads to access the free page reporting related
+     * fields (e.g. free_page_hint_status).
+     */
+    QemuMutex free_page_lock;
+    QemuCond  free_page_cond;
+    /*
+     * Set to block iothread to continue reading free page hints as the VM is
+     * stopped.
+     */
+    bool block_iothread;
+    NotifierWithReturn free_page_hint_notify;
     int64_t stats_last_update;
     int64_t stats_poll_interval;
     uint32_t host_features;
-} VirtIOBalloon;
+
+    bool qemu_4_0_config_size;
+    uint32_t poison_val;
+};
 
 #endif