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 int set_direct_map_valid_noflush(struct page *page, unsigned nr, bool valid); 66 bool kernel_page_present(struct page *page); 67 68 #endif 69