diff options
Diffstat (limited to 'arch/arm64/include/asm/pgtable-prot.h')
-rw-r--r-- | arch/arm64/include/asm/pgtable-prot.h | 122 |
1 files changed, 94 insertions, 28 deletions
diff --git a/arch/arm64/include/asm/pgtable-prot.h b/arch/arm64/include/asm/pgtable-prot.h index 9b165117a454..eed814b00a38 100644 --- a/arch/arm64/include/asm/pgtable-prot.h +++ b/arch/arm64/include/asm/pgtable-prot.h @@ -27,6 +27,40 @@ */ #define PMD_PRESENT_INVALID (_AT(pteval_t, 1) << 59) /* only when !PMD_SECT_VALID */ +#define _PROT_DEFAULT (PTE_TYPE_PAGE | PTE_AF | PTE_SHARED) +#define _PROT_SECT_DEFAULT (PMD_TYPE_SECT | PMD_SECT_AF | PMD_SECT_S) + +#define PROT_DEFAULT (_PROT_DEFAULT | PTE_MAYBE_NG) +#define PROT_SECT_DEFAULT (_PROT_SECT_DEFAULT | PMD_MAYBE_NG) + +#define PROT_DEVICE_nGnRnE (PROT_DEFAULT | PTE_PXN | PTE_UXN | PTE_WRITE | PTE_ATTRINDX(MT_DEVICE_nGnRnE)) +#define PROT_DEVICE_nGnRE (PROT_DEFAULT | PTE_PXN | PTE_UXN | PTE_WRITE | PTE_ATTRINDX(MT_DEVICE_nGnRE)) +#define PROT_NORMAL_NC (PROT_DEFAULT | PTE_PXN | PTE_UXN | PTE_WRITE | PTE_ATTRINDX(MT_NORMAL_NC)) +#define PROT_NORMAL (PROT_DEFAULT | PTE_PXN | PTE_UXN | PTE_WRITE | PTE_ATTRINDX(MT_NORMAL)) +#define PROT_NORMAL_TAGGED (PROT_DEFAULT | PTE_PXN | PTE_UXN | PTE_WRITE | PTE_ATTRINDX(MT_NORMAL_TAGGED)) + +#define PROT_SECT_DEVICE_nGnRE (PROT_SECT_DEFAULT | PMD_SECT_PXN | PMD_SECT_UXN | PMD_ATTRINDX(MT_DEVICE_nGnRE)) +#define PROT_SECT_NORMAL (PROT_SECT_DEFAULT | PMD_SECT_PXN | PMD_SECT_UXN | PTE_WRITE | PMD_ATTRINDX(MT_NORMAL)) +#define PROT_SECT_NORMAL_EXEC (PROT_SECT_DEFAULT | PMD_SECT_UXN | PMD_ATTRINDX(MT_NORMAL)) + +#define _PAGE_DEFAULT (_PROT_DEFAULT | PTE_ATTRINDX(MT_NORMAL)) + +#define _PAGE_KERNEL (PROT_NORMAL) +#define _PAGE_KERNEL_RO ((PROT_NORMAL & ~PTE_WRITE) | PTE_RDONLY) +#define _PAGE_KERNEL_ROX ((PROT_NORMAL & ~(PTE_WRITE | PTE_PXN)) | PTE_RDONLY) +#define _PAGE_KERNEL_EXEC (PROT_NORMAL & ~PTE_PXN) +#define _PAGE_KERNEL_EXEC_CONT ((PROT_NORMAL & ~PTE_PXN) | PTE_CONT) + +#define _PAGE_SHARED (_PAGE_DEFAULT | PTE_USER | PTE_RDONLY | PTE_NG | PTE_PXN | PTE_UXN | PTE_WRITE) +#define _PAGE_SHARED_EXEC (_PAGE_DEFAULT | PTE_USER | PTE_RDONLY | PTE_NG | PTE_PXN | PTE_WRITE) +#define _PAGE_READONLY (_PAGE_DEFAULT | PTE_USER | PTE_RDONLY | PTE_NG | PTE_PXN | PTE_UXN) +#define _PAGE_READONLY_EXEC (_PAGE_DEFAULT | PTE_USER | PTE_RDONLY | PTE_NG | PTE_PXN) +#define _PAGE_EXECONLY (_PAGE_DEFAULT | PTE_RDONLY | PTE_NG | PTE_PXN) + +#ifdef __ASSEMBLY__ +#define PTE_MAYBE_NG 0 +#endif + #ifndef __ASSEMBLY__ #include <asm/cpufeature.h> @@ -34,9 +68,6 @@ extern bool arm64_use_ng_mappings; -#define _PROT_DEFAULT (PTE_TYPE_PAGE | PTE_AF | PTE_SHARED) -#define _PROT_SECT_DEFAULT (PMD_TYPE_SECT | PMD_SECT_AF | PMD_SECT_S) - #define PTE_MAYBE_NG (arm64_use_ng_mappings ? PTE_NG : 0) #define PMD_MAYBE_NG (arm64_use_ng_mappings ? PMD_SECT_NG : 0) @@ -50,26 +81,11 @@ extern bool arm64_use_ng_mappings; #define PTE_MAYBE_GP 0 #endif -#define PROT_DEFAULT (_PROT_DEFAULT | PTE_MAYBE_NG) -#define PROT_SECT_DEFAULT (_PROT_SECT_DEFAULT | PMD_MAYBE_NG) - -#define PROT_DEVICE_nGnRnE (PROT_DEFAULT | PTE_PXN | PTE_UXN | PTE_WRITE | PTE_ATTRINDX(MT_DEVICE_nGnRnE)) -#define PROT_DEVICE_nGnRE (PROT_DEFAULT | PTE_PXN | PTE_UXN | PTE_WRITE | PTE_ATTRINDX(MT_DEVICE_nGnRE)) -#define PROT_NORMAL_NC (PROT_DEFAULT | PTE_PXN | PTE_UXN | PTE_WRITE | PTE_ATTRINDX(MT_NORMAL_NC)) -#define PROT_NORMAL (PROT_DEFAULT | PTE_PXN | PTE_UXN | PTE_WRITE | PTE_ATTRINDX(MT_NORMAL)) -#define PROT_NORMAL_TAGGED (PROT_DEFAULT | PTE_PXN | PTE_UXN | PTE_WRITE | PTE_ATTRINDX(MT_NORMAL_TAGGED)) - -#define PROT_SECT_DEVICE_nGnRE (PROT_SECT_DEFAULT | PMD_SECT_PXN | PMD_SECT_UXN | PMD_ATTRINDX(MT_DEVICE_nGnRE)) -#define PROT_SECT_NORMAL (PROT_SECT_DEFAULT | PMD_SECT_PXN | PMD_SECT_UXN | PMD_ATTRINDX(MT_NORMAL)) -#define PROT_SECT_NORMAL_EXEC (PROT_SECT_DEFAULT | PMD_SECT_UXN | PMD_ATTRINDX(MT_NORMAL)) - -#define _PAGE_DEFAULT (_PROT_DEFAULT | PTE_ATTRINDX(MT_NORMAL)) - -#define PAGE_KERNEL __pgprot(PROT_NORMAL) -#define PAGE_KERNEL_RO __pgprot((PROT_NORMAL & ~PTE_WRITE) | PTE_RDONLY) -#define PAGE_KERNEL_ROX __pgprot((PROT_NORMAL & ~(PTE_WRITE | PTE_PXN)) | PTE_RDONLY) -#define PAGE_KERNEL_EXEC __pgprot(PROT_NORMAL & ~PTE_PXN) -#define PAGE_KERNEL_EXEC_CONT __pgprot((PROT_NORMAL & ~PTE_PXN) | PTE_CONT) +#define PAGE_KERNEL __pgprot(_PAGE_KERNEL) +#define PAGE_KERNEL_RO __pgprot(_PAGE_KERNEL_RO) +#define PAGE_KERNEL_ROX __pgprot(_PAGE_KERNEL_ROX) +#define PAGE_KERNEL_EXEC __pgprot(_PAGE_KERNEL_EXEC) +#define PAGE_KERNEL_EXEC_CONT __pgprot(_PAGE_KERNEL_EXEC_CONT) #define PAGE_S2_MEMATTR(attr, has_fwb) \ ({ \ @@ -83,12 +99,62 @@ extern bool arm64_use_ng_mappings; #define PAGE_NONE __pgprot(((_PAGE_DEFAULT) & ~PTE_VALID) | PTE_PROT_NONE | PTE_RDONLY | PTE_NG | PTE_PXN | PTE_UXN) /* shared+writable pages are clean by default, hence PTE_RDONLY|PTE_WRITE */ -#define PAGE_SHARED __pgprot(_PAGE_DEFAULT | PTE_USER | PTE_RDONLY | PTE_NG | PTE_PXN | PTE_UXN | PTE_WRITE) -#define PAGE_SHARED_EXEC __pgprot(_PAGE_DEFAULT | PTE_USER | PTE_RDONLY | PTE_NG | PTE_PXN | PTE_WRITE) -#define PAGE_READONLY __pgprot(_PAGE_DEFAULT | PTE_USER | PTE_RDONLY | PTE_NG | PTE_PXN | PTE_UXN) -#define PAGE_READONLY_EXEC __pgprot(_PAGE_DEFAULT | PTE_USER | PTE_RDONLY | PTE_NG | PTE_PXN) -#define PAGE_EXECONLY __pgprot(_PAGE_DEFAULT | PTE_RDONLY | PTE_NG | PTE_PXN) +#define PAGE_SHARED __pgprot(_PAGE_SHARED) +#define PAGE_SHARED_EXEC __pgprot(_PAGE_SHARED_EXEC) +#define PAGE_READONLY __pgprot(_PAGE_READONLY) +#define PAGE_READONLY_EXEC __pgprot(_PAGE_READONLY_EXEC) +#define PAGE_EXECONLY __pgprot(_PAGE_EXECONLY) #endif /* __ASSEMBLY__ */ +#define pte_pi_index(pte) ( \ + ((pte & BIT(PTE_PI_IDX_3)) >> (PTE_PI_IDX_3 - 3)) | \ + ((pte & BIT(PTE_PI_IDX_2)) >> (PTE_PI_IDX_2 - 2)) | \ + ((pte & BIT(PTE_PI_IDX_1)) >> (PTE_PI_IDX_1 - 1)) | \ + ((pte & BIT(PTE_PI_IDX_0)) >> (PTE_PI_IDX_0 - 0))) + +/* + * Page types used via Permission Indirection Extension (PIE). PIE uses + * the USER, DBM, PXN and UXN bits to to generate an index which is used + * to look up the actual permission in PIR_ELx and PIRE0_EL1. We define + * combinations we use on non-PIE systems with the same encoding, for + * convenience these are listed here as comments as are the unallocated + * encodings. + */ + +/* 0: PAGE_DEFAULT */ +/* 1: PTE_USER */ +/* 2: PTE_WRITE */ +/* 3: PTE_WRITE | PTE_USER */ +/* 4: PAGE_EXECONLY PTE_PXN */ +/* 5: PAGE_READONLY_EXEC PTE_PXN | PTE_USER */ +/* 6: PTE_PXN | PTE_WRITE */ +/* 7: PAGE_SHARED_EXEC PTE_PXN | PTE_WRITE | PTE_USER */ +/* 8: PAGE_KERNEL_ROX PTE_UXN */ +/* 9: PTE_UXN | PTE_USER */ +/* a: PAGE_KERNEL_EXEC PTE_UXN | PTE_WRITE */ +/* b: PTE_UXN | PTE_WRITE | PTE_USER */ +/* c: PAGE_KERNEL_RO PTE_UXN | PTE_PXN */ +/* d: PAGE_READONLY PTE_UXN | PTE_PXN | PTE_USER */ +/* e: PAGE_KERNEL PTE_UXN | PTE_PXN | PTE_WRITE */ +/* f: PAGE_SHARED PTE_UXN | PTE_PXN | PTE_WRITE | PTE_USER */ + +#define PIE_E0 ( \ + PIRx_ELx_PERM(pte_pi_index(_PAGE_EXECONLY), PIE_X_O) | \ + PIRx_ELx_PERM(pte_pi_index(_PAGE_READONLY_EXEC), PIE_RX) | \ + PIRx_ELx_PERM(pte_pi_index(_PAGE_SHARED_EXEC), PIE_RWX) | \ + PIRx_ELx_PERM(pte_pi_index(_PAGE_READONLY), PIE_R) | \ + PIRx_ELx_PERM(pte_pi_index(_PAGE_SHARED), PIE_RW)) + +#define PIE_E1 ( \ + PIRx_ELx_PERM(pte_pi_index(_PAGE_EXECONLY), PIE_NONE_O) | \ + PIRx_ELx_PERM(pte_pi_index(_PAGE_READONLY_EXEC), PIE_R) | \ + PIRx_ELx_PERM(pte_pi_index(_PAGE_SHARED_EXEC), PIE_RW) | \ + PIRx_ELx_PERM(pte_pi_index(_PAGE_READONLY), PIE_R) | \ + PIRx_ELx_PERM(pte_pi_index(_PAGE_SHARED), PIE_RW) | \ + PIRx_ELx_PERM(pte_pi_index(_PAGE_KERNEL_ROX), PIE_RX) | \ + PIRx_ELx_PERM(pte_pi_index(_PAGE_KERNEL_EXEC), PIE_RWX) | \ + PIRx_ELx_PERM(pte_pi_index(_PAGE_KERNEL_RO), PIE_R) | \ + PIRx_ELx_PERM(pte_pi_index(_PAGE_KERNEL), PIE_RW)) + #endif /* __ASM_PGTABLE_PROT_H */ |