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