| 1 | #ifndef _LINUX_PKEYS_H
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| 2 | #define _LINUX_PKEYS_H
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| 3 |
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| 4 | #include <linux/mm_types.h>
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| 5 | #include <asm/mmu_context.h>
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| 6 |
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| 7 | #define PKEY_DISABLE_ACCESS 0x1
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| 8 | #define PKEY_DISABLE_WRITE 0x2
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| 9 | #define PKEY_ACCESS_MASK (PKEY_DISABLE_ACCESS |\
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| 10 | PKEY_DISABLE_WRITE)
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| 11 |
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| 12 | #ifdef CONFIG_ARCH_HAS_PKEYS
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| 13 | #include <asm/pkeys.h>
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| 14 | #else
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| 15 | #define arch_max_pkey() (1)
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| 16 | #define execute_only_pkey(mm) (0)
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| 17 | #define arch_override_mprotect_pkey(vma, prot, pkey) (0)
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| 18 | #define PKEY_DEDICATED_EXECUTE_ONLY 0
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| 19 | #endif
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| 20 |
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| 21 | |
| 22 | * This is called from mprotect_pkey().
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| 23 | *
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| 24 | * Returns true if the protection keys is valid.
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| 25 |
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| 26 | static inline bool validate_pkey(int pkey)
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| 27 | {
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| 28 | if (pkey < 0)
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| 29 | return false;
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| 30 | return (pkey < arch_max_pkey());
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| 31 | }
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| 32 |
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| 33 | #endif
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