diff options
author | André Fabian Silva Delgado <emulatorman@parabola.nu> | 2016-06-10 05:30:17 -0300 |
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committer | André Fabian Silva Delgado <emulatorman@parabola.nu> | 2016-06-10 05:30:17 -0300 |
commit | d635711daa98be86d4c7fd01499c34f566b54ccb (patch) | |
tree | aa5cc3760a27c3d57146498cb82fa549547de06c /include/linux/pkeys.h | |
parent | c91265cd0efb83778f015b4d4b1129bd2cfd075e (diff) |
Linux-libre 4.6.2-gnu
Diffstat (limited to 'include/linux/pkeys.h')
-rw-r--r-- | include/linux/pkeys.h | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/include/linux/pkeys.h b/include/linux/pkeys.h new file mode 100644 index 000000000..1d405a2b7 --- /dev/null +++ b/include/linux/pkeys.h @@ -0,0 +1,33 @@ +#ifndef _LINUX_PKEYS_H +#define _LINUX_PKEYS_H + +#include <linux/mm_types.h> +#include <asm/mmu_context.h> + +#define PKEY_DISABLE_ACCESS 0x1 +#define PKEY_DISABLE_WRITE 0x2 +#define PKEY_ACCESS_MASK (PKEY_DISABLE_ACCESS |\ + PKEY_DISABLE_WRITE) + +#ifdef CONFIG_ARCH_HAS_PKEYS +#include <asm/pkeys.h> +#else /* ! CONFIG_ARCH_HAS_PKEYS */ +#define arch_max_pkey() (1) +#define execute_only_pkey(mm) (0) +#define arch_override_mprotect_pkey(vma, prot, pkey) (0) +#define PKEY_DEDICATED_EXECUTE_ONLY 0 +#endif /* ! CONFIG_ARCH_HAS_PKEYS */ + +/* + * This is called from mprotect_pkey(). + * + * Returns true if the protection keys is valid. + */ +static inline bool validate_pkey(int pkey) +{ + if (pkey < 0) + return false; + return (pkey < arch_max_pkey()); +} + +#endif /* _LINUX_PKEYS_H */ |