From: Slim6882 <55942829+jackYoung0915@users.noreply.github.com> This reverts commit 779bd695219e9c567aed9e821185b6cc33ce79f9. --- arch/arm64/Kconfig | 16 ---------------- arch/arm64/include/asm/cpufeature.h | 6 ------ arch/arm64/include/asm/pgalloc.h | 10 ++++------ arch/arm64/include/asm/pgtable-hwdef.h | 3 --- arch/arm64/include/asm/sysreg.h | 1 - arch/arm64/kernel/cpufeature.c | 18 ------------------ arch/arm64/mm/mmu.c | 6 +++--- arch/arm64/mm/proc.S | 7 +------ arch/arm64/tools/cpucaps | 1 - 9 files changed, 8 insertions(+), 60 deletions(-) diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig index 750ed20347fe..6890847c1a13 100644 --- a/arch/arm64/Kconfig +++ b/arch/arm64/Kconfig @@ -1945,22 +1945,6 @@ config ARM64_EPAN The feature is detected at runtime, and will remain disabled if the cpu does not implement the feature. - -config ARM64_HAFT - bool "Support for Hardware managed Access Flag for Table Descriptors" - depends on ARM64_HW_AFDBM - default y - help - The ARMv8.9/ARMv9.5 introduces the feature Hardware managed Access - Flag for Table descriptors. When enabled an architectural executed - memory access will update the Access Flag in each Table descriptor - which is accessed during the translation table walk and for which - the Access Flag is 0. The Access Flag of the Table descriptor use - the same bit of PTE_AF. - - The feature will only be enabled if all the CPUs in the system - support this feature. If unsure, say Y. - endmenu config ARM64_SVE diff --git a/arch/arm64/include/asm/cpufeature.h b/arch/arm64/include/asm/cpufeature.h index 266ebca324ea..5df2188f8839 100644 --- a/arch/arm64/include/asm/cpufeature.h +++ b/arch/arm64/include/asm/cpufeature.h @@ -808,12 +808,6 @@ static inline bool system_supports_tlb_range(void) cpus_have_const_cap(ARM64_HAS_TLB_RANGE); } -static inline bool system_supports_haft(void) -{ - return IS_ENABLED(CONFIG_ARM64_HAFT) && - cpus_have_final_cap(ARM64_HAFT); -} - int do_emulate_mrs(struct pt_regs *regs, u32 sys_reg, u32 rt); bool try_emulate_mrs(struct pt_regs *regs, u32 isn); diff --git a/arch/arm64/include/asm/pgalloc.h b/arch/arm64/include/asm/pgalloc.h index 661964e99b9d..237224484d0f 100644 --- a/arch/arm64/include/asm/pgalloc.h +++ b/arch/arm64/include/asm/pgalloc.h @@ -27,7 +27,7 @@ static inline void __pud_populate(pud_t *pudp, phys_addr_t pmdp, pudval_t prot) static inline void pud_populate(struct mm_struct *mm, pud_t *pudp, pmd_t *pmdp) { - pudval_t pudval = PUD_TYPE_TABLE | PUD_TABLE_AF; + pudval_t pudval = PUD_TYPE_TABLE; pudval |= (mm == &init_mm) ? PUD_TABLE_UXN : PUD_TABLE_PXN; __pud_populate(pudp, __pa(pmdp), pudval); @@ -48,7 +48,7 @@ static inline void __p4d_populate(p4d_t *p4dp, phys_addr_t pudp, p4dval_t prot) static inline void p4d_populate(struct mm_struct *mm, p4d_t *p4dp, pud_t *pudp) { - p4dval_t p4dval = P4D_TYPE_TABLE | P4D_TABLE_AF; + p4dval_t p4dval = P4D_TYPE_TABLE; p4dval |= (mm == &init_mm) ? P4D_TABLE_UXN : P4D_TABLE_PXN; __p4d_populate(p4dp, __pa(pudp), p4dval); @@ -77,16 +77,14 @@ static inline void pmd_populate_kernel(struct mm_struct *mm, pmd_t *pmdp, pte_t *ptep) { VM_BUG_ON(mm && mm != &init_mm); - __pmd_populate(pmdp, __pa(ptep), - PMD_TYPE_TABLE | PMD_TABLE_AF | PMD_TABLE_UXN); + __pmd_populate(pmdp, __pa(ptep), PMD_TYPE_TABLE | PMD_TABLE_UXN); } static inline void pmd_populate(struct mm_struct *mm, pmd_t *pmdp, pgtable_t ptep) { VM_BUG_ON(mm == &init_mm); - __pmd_populate(pmdp, page_to_phys(ptep), - PMD_TYPE_TABLE | PMD_TABLE_AF | PMD_TABLE_PXN); + __pmd_populate(pmdp, page_to_phys(ptep), PMD_TYPE_TABLE | PMD_TABLE_PXN); } #endif diff --git a/arch/arm64/include/asm/pgtable-hwdef.h b/arch/arm64/include/asm/pgtable-hwdef.h index 115e0dced25b..66671ff05183 100644 --- a/arch/arm64/include/asm/pgtable-hwdef.h +++ b/arch/arm64/include/asm/pgtable-hwdef.h @@ -94,7 +94,6 @@ #define P4D_TYPE_MASK (_AT(p4dval_t, 3) << 0) #define P4D_TYPE_SECT (_AT(p4dval_t, 1) << 0) #define P4D_SECT_RDONLY (_AT(p4dval_t, 1) << 7) /* AP[2] */ -#define P4D_TABLE_AF (_AT(p4dval_t, 1) << 10) /* Ignored if no FEAT_HAFT */ #define P4D_TABLE_PXN (_AT(p4dval_t, 1) << 59) #define P4D_TABLE_UXN (_AT(p4dval_t, 1) << 60) @@ -106,7 +105,6 @@ #define PUD_TYPE_MASK (_AT(pudval_t, 3) << 0) #define PUD_TYPE_SECT (_AT(pudval_t, 1) << 0) #define PUD_SECT_RDONLY (_AT(pudval_t, 1) << 7) /* AP[2] */ -#define PUD_TABLE_AF (_AT(pudval_t, 1) << 10) /* Ignored if no FEAT_HAFT */ #define PUD_TABLE_PXN (_AT(pudval_t, 1) << 59) #define PUD_TABLE_UXN (_AT(pudval_t, 1) << 60) @@ -117,7 +115,6 @@ #define PMD_TYPE_TABLE (_AT(pmdval_t, 3) << 0) #define PMD_TYPE_SECT (_AT(pmdval_t, 1) << 0) #define PMD_TABLE_BIT (_AT(pmdval_t, 1) << 1) -#define PMD_TABLE_AF (_AT(pmdval_t, 1) << 10) /* Ignored if no FEAT_HAFT */ /* * Section diff --git a/arch/arm64/include/asm/sysreg.h b/arch/arm64/include/asm/sysreg.h index 70bbd78184fe..a7e99111f821 100644 --- a/arch/arm64/include/asm/sysreg.h +++ b/arch/arm64/include/asm/sysreg.h @@ -1598,7 +1598,6 @@ #define ID_AA64MMFR1_EL1_ETS_ETS2 UL(0b0010) #define ID_AA64MMFR1_EL1_ETS_ETS3 UL(0b0011) -#define ID_AA64MMFR1_EL1_HAFDBS_SHIFT 0 #define ID_AA64MMFR1_EL1_HAFDBS_HAFT UL(0b0011) #define ID_AA64MMFR1_EL1_HAFDBS_HDBSS UL(0b0100) diff --git a/arch/arm64/kernel/cpufeature.c b/arch/arm64/kernel/cpufeature.c index 3b7bd58665f3..e48894fb575d 100644 --- a/arch/arm64/kernel/cpufeature.c +++ b/arch/arm64/kernel/cpufeature.c @@ -2216,24 +2216,6 @@ static const struct arm64_cpu_capabilities arm64_features[] = { .matches = has_hw_dbm, .cpu_enable = cpu_enable_hw_dbm, }, -#endif -#ifdef CONFIG_ARM64_HAFT - { - .desc = "Hardware managed Access Flag for Table Descriptors", - /* - * Contrary to the page/block access flag, the table access flag - * cannot be emulated in software (no access fault will occur). - * Therefore this should be used only if it's supported system - * wide. - */ - .capability = ARM64_HAFT, - .type = ARM64_CPUCAP_SYSTEM_FEATURE, - .matches = has_cpuid_feature, - .sys_reg = SYS_ID_AA64MMFR1_EL1, - .sign = FTR_UNSIGNED, - .field_pos = ID_AA64MMFR1_EL1_HAFDBS_SHIFT, - .min_field_value = ID_AA64MMFR1_EL1_HAFDBS_HAFT, - }, #endif { .desc = "CRC32 instructions", diff --git a/arch/arm64/mm/mmu.c b/arch/arm64/mm/mmu.c index e21eb04cc0d9..d357d3960a26 100644 --- a/arch/arm64/mm/mmu.c +++ b/arch/arm64/mm/mmu.c @@ -188,7 +188,7 @@ static void alloc_init_cont_pte(pmd_t *pmdp, unsigned long addr, BUG_ON(pmd_sect(pmd)); if (pmd_none(pmd)) { - pmdval_t pmdval = PMD_TYPE_TABLE | PMD_TABLE_UXN | PMD_TABLE_AF; + pmdval_t pmdval = PMD_TYPE_TABLE | PMD_TABLE_UXN; phys_addr_t pte_phys; if (flags & NO_EXEC_MAPPINGS) @@ -266,7 +266,7 @@ static void alloc_init_cont_pmd(pud_t *pudp, unsigned long addr, */ BUG_ON(pud_sect(pud)); if (pud_none(pud)) { - pudval_t pudval = PUD_TYPE_TABLE | PUD_TABLE_UXN | PUD_TABLE_AF; + pudval_t pudval = PUD_TYPE_TABLE | PUD_TABLE_UXN; phys_addr_t pmd_phys; if (flags & NO_EXEC_MAPPINGS) @@ -317,7 +317,7 @@ static void alloc_init_pud(pgd_t *pgdp, unsigned long addr, unsigned long end, p4d_t p4d = READ_ONCE(*p4dp); if (p4d_none(p4d)) { - p4dval_t p4dval = P4D_TYPE_TABLE | P4D_TABLE_UXN | P4D_TABLE_AF; + p4dval_t p4dval = P4D_TYPE_TABLE | P4D_TABLE_UXN; phys_addr_t pud_phys; if (flags & NO_EXEC_MAPPINGS) diff --git a/arch/arm64/mm/proc.S b/arch/arm64/mm/proc.S index af7c5139b621..3d3c081e7881 100644 --- a/arch/arm64/mm/proc.S +++ b/arch/arm64/mm/proc.S @@ -450,14 +450,9 @@ SYM_FUNC_START(__cpu_setup) * via capabilities. */ mrs x9, ID_AA64MMFR1_EL1 - ubfx x9, x9, ID_AA64MMFR1_EL1_HAFDBS_SHIFT, #4 + and x9, x9, ID_AA64MMFR1_EL1_HAFDBS_MASK cbz x9, 1f orr tcr, tcr, #TCR_HA // hardware Access flag update -#ifdef CONFIG_ARM64_HAFT - cmp x9, ID_AA64MMFR1_EL1_HAFDBS_HAFT - b.lt 1f - orr tcr2, tcr2, TCR2_EL1x_HAFT -#endif /* CONFIG_ARM64_HAFT */ 1: #endif /* CONFIG_ARM64_HW_AFDBM */ msr mair_el1, mair diff --git a/arch/arm64/tools/cpucaps b/arch/arm64/tools/cpucaps index c7282a5d4726..07891af8aa94 100644 --- a/arch/arm64/tools/cpucaps +++ b/arch/arm64/tools/cpucaps @@ -38,7 +38,6 @@ HAS_SYSREG_GIC_CPUIF HAS_TIDCP1 HAS_TLB_RANGE HAS_VIRT_HOST_EXTN -HAFT HW_DBM KVM_PROTECTED_MODE MISMATCHED_CACHE_TYPE -- 2.33.0