| /* |
| * Virtio Support |
| * |
| * Copyright IBM, Corp. 2007-2008 |
| * |
| * Authors: |
| * Anthony Liguori <aliguori@us.ibm.com> |
| * Rusty Russell <rusty@rustcorp.com.au> |
| * |
| * This work is licensed under the terms of the GNU GPL, version 2. See |
| * the COPYING file in the top-level directory. |
| * |
| */ |
| |
| #ifndef QEMU_VIRTIO_BALLOON_H |
| #define QEMU_VIRTIO_BALLOON_H |
| |
| #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 { |
| uint16_t tag; |
| uint8_t reserved[6]; |
| 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, *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 |