include/linux/page_reporting.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 #ifndef _LINUX_PAGE_REPORTING_H
   3 #define _LINUX_PAGE_REPORTING_H
   4
   5 #include <linux/mmzone.h>
   6 #include <linux/scatterlist.h>
   7
   8 /* This value should always be a power of 2, see page_reporting_cycle() */
   9 #define PAGE_REPORTING_CAPACITY         32
  10
  11 struct page_reporting_dev_info {
  12         /* function that alters pages to make them "reported" */
  13         int (*report)(struct page_reporting_dev_info *prdev,
  14                       struct scatterlist *sg, unsigned int nents);
  15
  16         /* work struct for processing reports */
  17         struct delayed_work work;
  18
  19         /* Current state of page reporting */
  20         atomic_t state;
  21
  22         /* Minimal order of page reporting */
  23         unsigned int order;
  24 };
  25
  26 /* Tear-down and bring-up for page reporting devices */
  27 void page_reporting_unregister(struct page_reporting_dev_info *prdev);
  28 int page_reporting_register(struct page_reporting_dev_info *prdev);
  29 #endif /*_LINUX_PAGE_REPORTING_H */