xref: /openbmc/linux/arch/s390/include/asm/set_memory.h (revision 850612c8)
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 
7 extern struct mutex cpa_mutex;
8 
9 enum {
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 
27 int __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)					\
42 static inline int fname(unsigned long addr, int numpages)		\
43 {									\
44 	return __set_memory(addr, numpages, (flags));			\
45 }									\
46 									\
47 static 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 
63 int set_direct_map_invalid_noflush(struct page *page);
64 int set_direct_map_default_noflush(struct page *page);
65 
66 #endif
67