1/* SPDX-License-Identifier: GPL-2.0 */
2#ifndef _ASMS390_SET_MEMORY_H
3#define _ASMS390_SET_MEMORY_H
4
5#include <linux/mutex.h>
6
7extern struct mutex cpa_mutex;
8
9enum {
10	_SET_MEMORY_RO_BIT,
11	_SET_MEMORY_RW_BIT,
12	_SET_MEMORY_NX_BIT,
13	_SET_MEMORY_X_BIT,
14	_SET_MEMORY_4K_BIT,
15	_SET_MEMORY_INV_BIT,
16	_SET_MEMORY_DEF_BIT,
17};
18
19#define SET_MEMORY_RO	BIT(_SET_MEMORY_RO_BIT)
20#define SET_MEMORY_RW	BIT(_SET_MEMORY_RW_BIT)
21#define SET_MEMORY_NX	BIT(_SET_MEMORY_NX_BIT)
22#define SET_MEMORY_X	BIT(_SET_MEMORY_X_BIT)
23#define SET_MEMORY_4K	BIT(_SET_MEMORY_4K_BIT)
24#define SET_MEMORY_INV	BIT(_SET_MEMORY_INV_BIT)
25#define SET_MEMORY_DEF	BIT(_SET_MEMORY_DEF_BIT)
26
27int __set_memory(unsigned long addr, unsigned long numpages, unsigned long flags);
28
29#define set_memory_rox set_memory_rox
30
31/*
32 * Generate two variants of each set_memory() function:
33 *
34 * set_memory_yy(unsigned long addr, int numpages);
35 * __set_memory_yy(void *start, void *end);
36 *
37 * The second variant exists for both convenience to avoid the usual
38 * (unsigned long) casts, but unlike the first variant it can also be used
39 * for areas larger than 8TB, which may happen at memory initialization.
40 */
41#define __SET_MEMORY_FUNC(fname, flags)					\
42static inline int fname(unsigned long addr, int numpages)		\
43{									\
44	return __set_memory(addr, numpages, (flags));			\
45}									\
46									\
47static inline int __##fname(void *start, void *end)			\
48{									\
49	unsigned long numpages;						\
50									\
51	numpages = (end - start) >> PAGE_SHIFT;				\
52	return __set_memory((unsigned long)start, numpages, (flags));	\
53}
54
55__SET_MEMORY_FUNC(set_memory_ro, SET_MEMORY_RO)
56__SET_MEMORY_FUNC(set_memory_rw, SET_MEMORY_RW)
57__SET_MEMORY_FUNC(set_memory_nx, SET_MEMORY_NX)
58__SET_MEMORY_FUNC(set_memory_x, SET_MEMORY_X)
59__SET_MEMORY_FUNC(set_memory_rox, SET_MEMORY_RO | SET_MEMORY_X)
60__SET_MEMORY_FUNC(set_memory_rwnx, SET_MEMORY_RW | SET_MEMORY_NX)
61__SET_MEMORY_FUNC(set_memory_4k, SET_MEMORY_4K)
62
63int set_direct_map_invalid_noflush(struct page *page);
64int set_direct_map_default_noflush(struct page *page);
65
66#endif
67