Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  1) /* SPDX-License-Identifier: GPL-2.0-or-later */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  3)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  4) #ifndef _ASM_POWERPC_MMAN_H
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  5) #define _ASM_POWERPC_MMAN_H
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  6) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  7) #include <uapi/asm/mman.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  8) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  9) #ifdef CONFIG_PPC64
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <asm/cputable.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/mm.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/pkeys.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <asm/cpu_has_feature.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) static inline unsigned long arch_calc_vm_prot_bits(unsigned long prot,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) 		unsigned long pkey)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #ifdef CONFIG_PPC_MEM_KEYS
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) 	return (((prot & PROT_SAO) ? VM_SAO : 0) | pkey_to_vmflag_bits(pkey));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) #else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) 	return ((prot & PROT_SAO) ? VM_SAO : 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) #define arch_calc_vm_prot_bits(prot, pkey) arch_calc_vm_prot_bits(prot, pkey)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) static inline pgprot_t arch_vm_get_page_prot(unsigned long vm_flags)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) #ifdef CONFIG_PPC_MEM_KEYS
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) 	return (vm_flags & VM_SAO) ?
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) 		__pgprot(_PAGE_SAO | vmflag_to_pte_pkey_bits(vm_flags)) :
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) 		__pgprot(0 | vmflag_to_pte_pkey_bits(vm_flags));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) #else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) 	return (vm_flags & VM_SAO) ? __pgprot(_PAGE_SAO) : __pgprot(0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) #define arch_vm_get_page_prot(vm_flags) arch_vm_get_page_prot(vm_flags)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) static inline bool arch_validate_prot(unsigned long prot, unsigned long addr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) 	if (prot & ~(PROT_READ | PROT_WRITE | PROT_EXEC | PROT_SEM | PROT_SAO))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) 		return false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) 	if (prot & PROT_SAO) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) 		if (!cpu_has_feature(CPU_FTR_SAO))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) 			return false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) 		if (firmware_has_feature(FW_FEATURE_LPAR) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) 		    !IS_ENABLED(CONFIG_PPC_PROT_SAO_LPAR))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) 			return false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) 	return true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) #define arch_validate_prot arch_validate_prot
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) #endif /* CONFIG_PPC64 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) #endif	/* _ASM_POWERPC_MMAN_H */