1// SPDX-License-Identifier: GPL-2.0
2/*
3 * Common Primitives for DAMON Modules
4 *
5 * Author: SeongJae Park <sj@kernel.org>
6 */
7
8#include <linux/damon.h>
9
10#include "modules-common.h"
11
12/*
13 * Allocate, set, and return a DAMON context for the physical address space.
14 * @ctxp:	Pointer to save the point to the newly created context
15 * @targetp:	Pointer to save the point to the newly created target
16 */
17int damon_modules_new_paddr_ctx_target(struct damon_ctx **ctxp,
18		struct damon_target **targetp)
19{
20	struct damon_ctx *ctx;
21	struct damon_target *target;
22
23	ctx = damon_new_ctx();
24	if (!ctx)
25		return -ENOMEM;
26
27	if (damon_select_ops(ctx, DAMON_OPS_PADDR)) {
28		damon_destroy_ctx(ctx);
29		return -EINVAL;
30	}
31
32	target = damon_new_target();
33	if (!target) {
34		damon_destroy_ctx(ctx);
35		return -ENOMEM;
36	}
37	damon_add_target(ctx, target);
38
39	*ctxp = ctx;
40	*targetp = target;
41	return 0;
42}
43