^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) /* SPDX-License-Identifier: GPL-2.0-only */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * Copyright (C) 2016 ARM Ltd.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) #ifndef __ASM_PGTABLE_PROT_H
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) #define __ASM_PGTABLE_PROT_H
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) #include <asm/memory.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) #include <asm/pgtable-hwdef.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <linux/const.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) * Software defined PTE bits definition.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #define PTE_WRITE (PTE_DBM) /* same as DBM (51) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #define PTE_DIRTY (_AT(pteval_t, 1) << 55)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #define PTE_SPECIAL (_AT(pteval_t, 1) << 56)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #define PTE_DEVMAP (_AT(pteval_t, 1) << 57)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) #define PTE_PROT_NONE (_AT(pteval_t, 1) << 58) /* only when !PTE_VALID */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) * This bit indicates that the entry is present i.e. pmd_page()
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) * still points to a valid huge page in memory even if the pmd
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) * has been invalidated.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) #define PMD_PRESENT_INVALID (_AT(pteval_t, 1) << 59) /* only when !PMD_SECT_VALID */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) #ifndef __ASSEMBLY__
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) #include <asm/cpufeature.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) #include <asm/pgtable-types.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) extern bool arm64_use_ng_mappings;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) #define _PROT_DEFAULT (PTE_TYPE_PAGE | PTE_AF | PTE_SHARED)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) #define _PROT_SECT_DEFAULT (PMD_TYPE_SECT | PMD_SECT_AF | PMD_SECT_S)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) #define PTE_MAYBE_NG (arm64_use_ng_mappings ? PTE_NG : 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) #define PMD_MAYBE_NG (arm64_use_ng_mappings ? PMD_SECT_NG : 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) * If we have userspace only BTI we don't want to mark kernel pages
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) * guarded even if the system does support BTI.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) #ifdef CONFIG_ARM64_BTI_KERNEL
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) #define PTE_MAYBE_GP (system_supports_bti() ? PTE_GP : 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) #else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) #define PTE_MAYBE_GP 0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) #define PROT_DEFAULT (_PROT_DEFAULT | PTE_MAYBE_NG)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) #define PROT_SECT_DEFAULT (_PROT_SECT_DEFAULT | PMD_MAYBE_NG)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) #define PROT_DEVICE_nGnRnE (PROT_DEFAULT | PTE_PXN | PTE_UXN | PTE_WRITE | PTE_ATTRINDX(MT_DEVICE_nGnRnE))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) #define PROT_DEVICE_nGnRE (PROT_DEFAULT | PTE_PXN | PTE_UXN | PTE_WRITE | PTE_ATTRINDX(MT_DEVICE_nGnRE))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) #define PROT_NORMAL_NC (PROT_DEFAULT | PTE_PXN | PTE_UXN | PTE_WRITE | PTE_ATTRINDX(MT_NORMAL_NC))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) #define PROT_NORMAL_WT (PROT_DEFAULT | PTE_PXN | PTE_UXN | PTE_WRITE | PTE_ATTRINDX(MT_NORMAL_WT))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) #define PROT_NORMAL (PROT_DEFAULT | PTE_PXN | PTE_UXN | PTE_WRITE | PTE_ATTRINDX(MT_NORMAL))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) #define PROT_NORMAL_TAGGED (PROT_DEFAULT | PTE_PXN | PTE_UXN | PTE_WRITE | PTE_ATTRINDX(MT_NORMAL_TAGGED))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) #define PROT_SECT_DEVICE_nGnRE (PROT_SECT_DEFAULT | PMD_SECT_PXN | PMD_SECT_UXN | PMD_ATTRINDX(MT_DEVICE_nGnRE))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) #define PROT_SECT_NORMAL (PROT_SECT_DEFAULT | PMD_SECT_PXN | PMD_SECT_UXN | PMD_ATTRINDX(MT_NORMAL))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) #define PROT_SECT_NORMAL_EXEC (PROT_SECT_DEFAULT | PMD_SECT_UXN | PMD_ATTRINDX(MT_NORMAL))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) #define _PAGE_DEFAULT (_PROT_DEFAULT | PTE_ATTRINDX(MT_NORMAL))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) #define PAGE_KERNEL __pgprot(PROT_NORMAL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) #define PAGE_KERNEL_RO __pgprot((PROT_NORMAL & ~PTE_WRITE) | PTE_RDONLY)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) #define PAGE_KERNEL_ROX __pgprot((PROT_NORMAL & ~(PTE_WRITE | PTE_PXN)) | PTE_RDONLY)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) #define PAGE_KERNEL_EXEC __pgprot(PROT_NORMAL & ~PTE_PXN)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) #define PAGE_KERNEL_EXEC_CONT __pgprot((PROT_NORMAL & ~PTE_PXN) | PTE_CONT)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) #define PAGE_S2_MEMATTR(attr, has_fwb) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) ({ \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) u64 __val; \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) if (has_fwb) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) __val = PTE_S2_MEMATTR(MT_S2_FWB_ ## attr); \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) else \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) __val = PTE_S2_MEMATTR(MT_S2_ ## attr); \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) __val; \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) })
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) #define PAGE_NONE __pgprot(((_PAGE_DEFAULT) & ~PTE_VALID) | PTE_PROT_NONE | PTE_RDONLY | PTE_NG | PTE_PXN | PTE_UXN)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) /* shared+writable pages are clean by default, hence PTE_RDONLY|PTE_WRITE */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) #define PAGE_SHARED __pgprot(_PAGE_DEFAULT | PTE_USER | PTE_RDONLY | PTE_NG | PTE_PXN | PTE_UXN | PTE_WRITE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) #define PAGE_SHARED_EXEC __pgprot(_PAGE_DEFAULT | PTE_USER | PTE_RDONLY | PTE_NG | PTE_PXN | PTE_WRITE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) #define PAGE_READONLY __pgprot(_PAGE_DEFAULT | PTE_USER | PTE_RDONLY | PTE_NG | PTE_PXN | PTE_UXN)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) #define PAGE_READONLY_EXEC __pgprot(_PAGE_DEFAULT | PTE_USER | PTE_RDONLY | PTE_NG | PTE_PXN)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) #define __P000 PAGE_NONE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) #define __P001 PAGE_READONLY
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) #define __P010 PAGE_READONLY
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) #define __P011 PAGE_READONLY
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) #define __P100 PAGE_READONLY_EXEC
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) #define __P101 PAGE_READONLY_EXEC
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) #define __P110 PAGE_READONLY_EXEC
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) #define __P111 PAGE_READONLY_EXEC
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) #define __S000 PAGE_NONE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) #define __S001 PAGE_READONLY
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) #define __S010 PAGE_SHARED
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) #define __S011 PAGE_SHARED
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) #define __S100 PAGE_READONLY_EXEC
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) #define __S101 PAGE_READONLY_EXEC
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) #define __S110 PAGE_SHARED_EXEC
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) #define __S111 PAGE_SHARED_EXEC
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) #endif /* __ASSEMBLY__ */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) #endif /* __ASM_PGTABLE_PROT_H */
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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