[linux-2.6-block.git] / include / linux / pkeys.h

#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 */
Commit	Line	Data
66d37570 DH	1	#ifndef _LINUX_PKEYS_H
	2	#define _LINUX_PKEYS_H
	3
	4	#include <linux/mm_types.h>
	5	#include <asm/mmu_context.h>
	6
84594296 DH	7	#define PKEY_DISABLE_ACCESS 0x1
	8	#define PKEY_DISABLE_WRITE 0x2
	9	#define PKEY_ACCESS_MASK (PKEY_DISABLE_ACCESS \|\
	10	PKEY_DISABLE_WRITE)
	11
66d37570 DH	12	#ifdef CONFIG_ARCH_HAS_PKEYS
	13	#include <asm/pkeys.h>
	14	#else /* ! CONFIG_ARCH_HAS_PKEYS */
	15	#define arch_max_pkey() (1)
62b5f7d0 DH	16	#define execute_only_pkey(mm) (0)
	17	#define arch_override_mprotect_pkey(vma, prot, pkey) (0)
	18	#define PKEY_DEDICATED_EXECUTE_ONLY 0
66d37570 DH	19	#endif /* ! CONFIG_ARCH_HAS_PKEYS */
	20
	21	/*
	22	* This is called from mprotect_pkey().
	23	*
	24	* Returns true if the protection keys is valid.
	25	*/
	26	static inline bool validate_pkey(int pkey)
	27	{
	28	if (pkey < 0)
	29	return false;
	30	return (pkey < arch_max_pkey());
	31	}
	32
	33	#endif /* _LINUX_PKEYS_H */