| /* SPDX-License-Identifier: GPL-2.0-or-later */ |
| /* |
| */ |
| #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> |
| |
| 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) { |
| if (!cpu_has_feature(CPU_FTR_SAO)) |
| return false; |
| if (firmware_has_feature(FW_FEATURE_LPAR) && |
| !IS_ENABLED(CONFIG_PPC_PROT_SAO_LPAR)) |
| return false; |
| } |
| return true; |
| } |
| #define arch_validate_prot arch_validate_prot |
| |
| #endif /* CONFIG_PPC64 */ |
| #endif /* _ASM_POWERPC_MMAN_H */ |
