diff options
Diffstat (limited to 'include/hw/virtio/virtio-balloon.h')
| -rw-r--r-- | include/hw/virtio/virtio-balloon.h | 31 |
1 files changed, 30 insertions, 1 deletions
diff --git a/include/hw/virtio/virtio-balloon.h b/include/hw/virtio/virtio-balloon.h index e0df3528c8..1afafb12f6 100644 --- a/include/hw/virtio/virtio-balloon.h +++ b/include/hw/virtio/virtio-balloon.h @@ -17,11 +17,14 @@ #include "standard-headers/linux/virtio_balloon.h" #include "hw/virtio/virtio.h" +#include "sysemu/iothread.h" #define TYPE_VIRTIO_BALLOON "virtio-balloon-device" #define VIRTIO_BALLOON(obj) \ OBJECT_CHECK(VirtIOBalloon, (obj), TYPE_VIRTIO_BALLOON) +#define VIRTIO_BALLOON_FREE_PAGE_REPORT_CMD_ID_MIN 0x80000000 + typedef struct virtio_balloon_stat VirtIOBalloonStat; typedef struct virtio_balloon_stat_modern { @@ -30,18 +33,44 @@ typedef struct virtio_balloon_stat_modern { uint64_t val; } VirtIOBalloonStatModern; +typedef struct PartiallyBalloonedPage PartiallyBalloonedPage; + +enum virtio_balloon_free_page_report_status { + FREE_PAGE_REPORT_S_STOP = 0, + FREE_PAGE_REPORT_S_REQUESTED = 1, + FREE_PAGE_REPORT_S_START = 2, + FREE_PAGE_REPORT_S_DONE = 3, +}; + typedef struct VirtIOBalloon { VirtIODevice parent_obj; - VirtQueue *ivq, *dvq, *svq; + VirtQueue *ivq, *dvq, *svq, *free_page_vq; + uint32_t free_page_report_status; uint32_t num_pages; uint32_t actual; + uint32_t free_page_report_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_report_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_report_notify; int64_t stats_last_update; int64_t stats_poll_interval; uint32_t host_features; + PartiallyBalloonedPage *pbp; } VirtIOBalloon; #endif |