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
11struct 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 */
27void page_reporting_unregister(struct page_reporting_dev_info *prdev);
28int page_reporting_register(struct page_reporting_dev_info *prdev);
29#endif /*_LINUX_PAGE_REPORTING_H */