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#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 */
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