| 1 |
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| 2 | #ifndef _ASMS390_SET_MEMORY_H
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| 3 | #define _ASMS390_SET_MEMORY_H
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| 4 |
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| 5 | #include <linux/mutex.h>
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| 6 |
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| 7 | extern struct mutex cpa_mutex;
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| 8 |
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| 9 | enum {
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| 10 | _SET_MEMORY_RO_BIT,
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| 11 | _SET_MEMORY_RW_BIT,
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| 12 | _SET_MEMORY_NX_BIT,
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| 13 | _SET_MEMORY_X_BIT,
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| 14 | _SET_MEMORY_4K_BIT,
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| 15 | _SET_MEMORY_INV_BIT,
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| 16 | _SET_MEMORY_DEF_BIT,
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| 17 | };
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| 18 |
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| 19 | #define SET_MEMORY_RO BIT(_SET_MEMORY_RO_BIT)
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| 20 | #define SET_MEMORY_RW BIT(_SET_MEMORY_RW_BIT)
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| 21 | #define SET_MEMORY_NX BIT(_SET_MEMORY_NX_BIT)
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| 22 | #define SET_MEMORY_X BIT(_SET_MEMORY_X_BIT)
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| 23 | #define SET_MEMORY_4K BIT(_SET_MEMORY_4K_BIT)
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| 24 | #define SET_MEMORY_INV BIT(_SET_MEMORY_INV_BIT)
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| 25 | #define SET_MEMORY_DEF BIT(_SET_MEMORY_DEF_BIT)
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| 26 |
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| 27 | int __set_memory(unsigned long addr, unsigned long numpages, unsigned long flags);
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| 28 |
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| 29 | #define set_memory_rox set_memory_rox
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| 30 |
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| 31 | |
| 32 | * Generate two variants of each set_memory() function:
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| 33 | *
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| 34 | * set_memory_yy(unsigned long addr, int numpages);
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| 35 | * __set_memory_yy(void *start, void *end);
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| 36 | *
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| 37 | * The second variant exists for both convenience to avoid the usual
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| 38 | * (unsigned long) casts, but unlike the first variant it can also be used
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| 39 | * for areas larger than 8TB, which may happen at memory initialization.
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| 40 |
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| 41 | #define __SET_MEMORY_FUNC(fname, flags) \
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| 42 | static inline int fname(unsigned long addr, int numpages) \
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| 43 | { \
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| 44 | return __set_memory(addr, numpages, (flags)); \
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| 45 | } \
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| 46 | \
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| 47 | static inline int __##fname(void *start, void *end) \
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| 48 | { \
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| 49 | unsigned long numpages; \
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| 50 | \
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| 51 | numpages = (end - start) >> PAGE_SHIFT; \
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| 52 | return __set_memory((unsigned long)start, numpages, (flags)); \
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| 53 | }
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| 54 |
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| 55 | __SET_MEMORY_FUNC(set_memory_ro, SET_MEMORY_RO)
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| 56 | __SET_MEMORY_FUNC(set_memory_rw, SET_MEMORY_RW)
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| 57 | __SET_MEMORY_FUNC(set_memory_nx, SET_MEMORY_NX)
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| 58 | __SET_MEMORY_FUNC(set_memory_x, SET_MEMORY_X)
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| 59 | __SET_MEMORY_FUNC(set_memory_rox, SET_MEMORY_RO | SET_MEMORY_X)
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| 60 | __SET_MEMORY_FUNC(set_memory_rwnx, SET_MEMORY_RW | SET_MEMORY_NX)
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| 61 | __SET_MEMORY_FUNC(set_memory_4k, SET_MEMORY_4K)
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| 62 |
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| 63 | int set_direct_map_invalid_noflush(struct page *page);
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| 64 | int set_direct_map_default_noflush(struct page *page);
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| 65 | int set_direct_map_valid_noflush(struct page *page, unsigned nr, bool valid);
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| 66 | bool kernel_page_present(struct page *page);
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| 67 |
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| 68 | #endif
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