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/*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version
* 2 of the License, or (at your option) any later version.
*/
#ifndef _ASM_POWERPC_MMAN_H
#define _ASM_POWERPC_MMAN_H
#include <uapi/asm/mman.h>
#ifdef CONFIG_PPC64
#include <asm/cputable.h>
#include <linux/mm.h>
#include <linux/pkeys.h>
#include <asm/cpu_has_feature.h>
/*
* This file is included by linux/mman.h, so we can't use cacl_vm_prot_bits()
* here. How important is the optimization?
*/
static inline unsigned long arch_calc_vm_prot_bits(unsigned long prot,
unsigned long pkey)
{
#ifdef CONFIG_PPC_MEM_KEYS
return (((prot & PROT_SAO) ? VM_SAO : 0) | pkey_to_vmflag_bits(pkey));
#else
return ((prot & PROT_SAO) ? VM_SAO : 0);
#endif
}
#define arch_calc_vm_prot_bits(prot, pkey) arch_calc_vm_prot_bits(prot, pkey)
static inline pgprot_t arch_vm_get_page_prot(unsigned long vm_flags)
{
#ifdef CONFIG_PPC_MEM_KEYS
return (vm_flags & VM_SAO) ?
__pgprot(_PAGE_SAO | vmflag_to_pte_pkey_bits(vm_flags)) :
__pgprot(0 | vmflag_to_pte_pkey_bits(vm_flags));
#else
return (vm_flags & VM_SAO) ? __pgprot(_PAGE_SAO) : __pgprot(0);
#endif
}
#define arch_vm_get_page_prot(vm_flags) arch_vm_get_page_prot(vm_flags)
static inline bool arch_validate_prot(unsigned long prot, unsigned long addr)
{
if (prot & ~(PROT_READ | PROT_WRITE | PROT_EXEC | PROT_SEM | PROT_SAO))
return false;
if ((prot & PROT_SAO) && !cpu_has_feature(CPU_FTR_SAO))
return false;
return true;
}
#define arch_validate_prot arch_validate_prot
#endif /* CONFIG_PPC64 */
#endif /* _ASM_POWERPC_MMAN_H */
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