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55 lines
1.4 KiB
55 lines
1.4 KiB
/* 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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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) { |
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if (!cpu_has_feature(CPU_FTR_SAO)) |
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return false; |
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if (firmware_has_feature(FW_FEATURE_LPAR) && |
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!IS_ENABLED(CONFIG_PPC_PROT_SAO_LPAR)) |
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return false; |
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} |
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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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