arch/s390/include/asm/set_memory.h

   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 bool kernel_page_present(struct page *page);
  66
  67 #endif