dump: add API to write dump pages

functions are used to write page to vmcore. vmcore is written page by page.
page desc is used to store the information of a page, including a page's size,
offset, compression format, etc.

Signed-off-by: Qiao Nuohan <qiaonuohan@cn.fujitsu.com>
Reviewed-by: Laszlo Ersek <lersek@redhat.com>
Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>

1 files changed, 7 insertions, 0 deletions

diff --git a/include/sysemu/dump.h b/include/sysemu/dump.h
index 92a95e4b92..efab7a32f3 100644
--- a/include/sysemu/dump.h
+++ b/include/sysemu/dump.h
@@ -151,6 +151,13 @@ typedef struct DataCache {
     off_t offset;       /* offset of the file */
 } DataCache;
 
+typedef struct QEMU_PACKED PageDescriptor {
+    uint64_t offset;                /* the offset of the page data*/
+    uint32_t size;                  /* the size of this dump page */
+    uint32_t flags;                 /* flags */
+    uint64_t page_flags;            /* page flags */
+} PageDescriptor;
+
 struct GuestPhysBlockList; /* memory_mapping.h */
 int cpu_get_dump_info(ArchDumpInfo *info,
                       const struct GuestPhysBlockList *guest_phys_blocks);