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Based on 1 normalized pattern(s): 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 extracted by the scancode license scanner the SPDX license identifier GPL-2.0-or-later has been chosen to replace the boilerplate/reference in 3029 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Allison Randal <allison@lohutok.net> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190527070032.746973796@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
55 lines
1.4 KiB
C
55 lines
1.4 KiB
C
/* SPDX-License-Identifier: GPL-2.0-or-later */
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/*
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*/
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#ifndef _ASM_POWERPC_MMAN_H
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#define _ASM_POWERPC_MMAN_H
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#include <uapi/asm/mman.h>
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#ifdef CONFIG_PPC64
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#include <asm/cputable.h>
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#include <linux/mm.h>
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#include <linux/pkeys.h>
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#include <asm/cpu_has_feature.h>
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/*
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* This file is included by linux/mman.h, so we can't use cacl_vm_prot_bits()
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* here. How important is the optimization?
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*/
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static inline unsigned long arch_calc_vm_prot_bits(unsigned long prot,
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unsigned long pkey)
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{
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#ifdef CONFIG_PPC_MEM_KEYS
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return (((prot & PROT_SAO) ? VM_SAO : 0) | pkey_to_vmflag_bits(pkey));
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#else
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return ((prot & PROT_SAO) ? VM_SAO : 0);
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#endif
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}
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#define arch_calc_vm_prot_bits(prot, pkey) arch_calc_vm_prot_bits(prot, pkey)
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static inline pgprot_t arch_vm_get_page_prot(unsigned long vm_flags)
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{
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#ifdef CONFIG_PPC_MEM_KEYS
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return (vm_flags & VM_SAO) ?
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__pgprot(_PAGE_SAO | vmflag_to_pte_pkey_bits(vm_flags)) :
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__pgprot(0 | vmflag_to_pte_pkey_bits(vm_flags));
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#else
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return (vm_flags & VM_SAO) ? __pgprot(_PAGE_SAO) : __pgprot(0);
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#endif
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}
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#define arch_vm_get_page_prot(vm_flags) arch_vm_get_page_prot(vm_flags)
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static inline bool arch_validate_prot(unsigned long prot, unsigned long addr)
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{
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if (prot & ~(PROT_READ | PROT_WRITE | PROT_EXEC | PROT_SEM | PROT_SAO))
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return false;
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if ((prot & PROT_SAO) && !cpu_has_feature(CPU_FTR_SAO))
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return false;
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return true;
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}
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#define arch_validate_prot arch_validate_prot
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#endif /* CONFIG_PPC64 */
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#endif /* _ASM_POWERPC_MMAN_H */
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