diff options
Diffstat (limited to 'include/asm-generic')
25 files changed, 369 insertions, 124 deletions
diff --git a/include/asm-generic/4level-fixup.h b/include/asm-generic/4level-fixup.h index 89f3b03b1445..e3667c9a33a5 100644 --- a/include/asm-generic/4level-fixup.h +++ b/include/asm-generic/4level-fixup.h @@ -3,7 +3,7 @@ #define _4LEVEL_FIXUP_H #define __ARCH_HAS_4LEVEL_HACK -#define __PAGETABLE_PUD_FOLDED +#define __PAGETABLE_PUD_FOLDED 1 #define PUD_SHIFT PGDIR_SHIFT #define PUD_SIZE PGDIR_SIZE diff --git a/include/asm-generic/5level-fixup.h b/include/asm-generic/5level-fixup.h index 9c2e0708eb82..bb6cb347018c 100644 --- a/include/asm-generic/5level-fixup.h +++ b/include/asm-generic/5level-fixup.h @@ -3,7 +3,7 @@ #define _5LEVEL_FIXUP_H #define __ARCH_HAS_5LEVEL_HACK -#define __PAGETABLE_P4D_FOLDED +#define __PAGETABLE_P4D_FOLDED 1 #define P4D_SHIFT PGDIR_SHIFT #define P4D_SIZE PGDIR_SIZE @@ -26,6 +26,7 @@ #define p4d_clear(p4d) pgd_clear(p4d) #define p4d_val(p4d) pgd_val(p4d) #define p4d_populate(mm, p4d, pud) pgd_populate(mm, p4d, pud) +#define p4d_populate_safe(mm, p4d, pud) pgd_populate(mm, p4d, pud) #define p4d_page(p4d) pgd_page(p4d) #define p4d_page_vaddr(p4d) pgd_page_vaddr(p4d) diff --git a/include/asm-generic/bitops/builtin-fls.h b/include/asm-generic/bitops/builtin-fls.h index 62daf940989d..c8455cc28841 100644 --- a/include/asm-generic/bitops/builtin-fls.h +++ b/include/asm-generic/bitops/builtin-fls.h @@ -9,7 +9,7 @@ * This is defined the same way as ffs. * Note fls(0) = 0, fls(1) = 1, fls(0x80000000) = 32. */ -static __always_inline int fls(int x) +static __always_inline int fls(unsigned int x) { return x ? sizeof(x) * 8 - __builtin_clz(x) : 0; } diff --git a/include/asm-generic/bitops/fls.h b/include/asm-generic/bitops/fls.h index 753aecaab641..b168bb10e1be 100644 --- a/include/asm-generic/bitops/fls.h +++ b/include/asm-generic/bitops/fls.h @@ -10,7 +10,7 @@ * Note fls(0) = 0, fls(1) = 1, fls(0x80000000) = 32. */ -static __always_inline int fls(int x) +static __always_inline int fls(unsigned int x) { int r = 32; diff --git a/include/asm-generic/bug.h b/include/asm-generic/bug.h index a7613e1b0c87..20561a60db9c 100644 --- a/include/asm-generic/bug.h +++ b/include/asm-generic/bug.h @@ -75,9 +75,19 @@ struct bug_entry { /* * WARN(), WARN_ON(), WARN_ON_ONCE, and so on can be used to report - * significant issues that need prompt attention if they should ever - * appear at runtime. Use the versions with printk format strings - * to provide better diagnostics. + * significant kernel issues that need prompt attention if they should ever + * appear at runtime. + * + * Do not use these macros when checking for invalid external inputs + * (e.g. invalid system call arguments, or invalid data coming from + * network/devices), and on transient conditions like ENOMEM or EAGAIN. + * These macros should be used for recoverable kernel issues only. + * For invalid external inputs, transient conditions, etc use + * pr_err[_once/_ratelimited]() followed by dump_stack(), if necessary. + * Do not include "BUG"/"WARNING" in format strings manually to make these + * conditions distinguishable from kernel issues. + * + * Use the versions with printk format strings to provide better diagnostics. */ #ifndef __WARN_TAINT extern __printf(3, 4) diff --git a/include/asm-generic/compat.h b/include/asm-generic/compat.h index 28819451b6d1..a86f65bffab8 100644 --- a/include/asm-generic/compat.h +++ b/include/asm-generic/compat.h @@ -1,3 +1,25 @@ /* SPDX-License-Identifier: GPL-2.0 */ +#ifndef __ASM_GENERIC_COMPAT_H +#define __ASM_GENERIC_COMPAT_H -/* This is an empty stub for 32-bit-only architectures */ +/* These types are common across all compat ABIs */ +typedef u32 compat_size_t; +typedef s32 compat_ssize_t; +typedef s32 compat_clock_t; +typedef s32 compat_pid_t; +typedef u32 compat_ino_t; +typedef s32 compat_off_t; +typedef s64 compat_loff_t; +typedef s32 compat_daddr_t; +typedef s32 compat_timer_t; +typedef s32 compat_key_t; +typedef s16 compat_short_t; +typedef s32 compat_int_t; +typedef s32 compat_long_t; +typedef u16 compat_ushort_t; +typedef u32 compat_uint_t; +typedef u32 compat_ulong_t; +typedef u32 compat_uptr_t; +typedef u32 compat_aio_context_t; + +#endif diff --git a/include/asm-generic/dma-mapping.h b/include/asm-generic/dma-mapping.h index ad2868263867..c13f46109e88 100644 --- a/include/asm-generic/dma-mapping.h +++ b/include/asm-generic/dma-mapping.h @@ -4,16 +4,7 @@ static inline const struct dma_map_ops *get_arch_dma_ops(struct bus_type *bus) { - /* - * Use the non-coherent ops if available. If an architecture wants a - * more fine-grained selection of operations it will have to implement - * get_arch_dma_ops itself or use the per-device dma_ops. - */ -#ifdef CONFIG_DMA_NONCOHERENT_OPS - return &dma_noncoherent_ops; -#else - return &dma_direct_ops; -#endif + return NULL; } #endif /* _ASM_GENERIC_DMA_MAPPING_H */ diff --git a/include/asm-generic/error-injection.h b/include/asm-generic/error-injection.h index 296c65442f00..95a159a4137f 100644 --- a/include/asm-generic/error-injection.h +++ b/include/asm-generic/error-injection.h @@ -8,6 +8,7 @@ enum { EI_ETYPE_NULL, /* Return NULL if failure */ EI_ETYPE_ERRNO, /* Return -ERRNO if failure */ EI_ETYPE_ERRNO_NULL, /* Return -ERRNO or NULL if failure */ + EI_ETYPE_TRUE, /* Return true if failure */ }; struct error_injection_entry { diff --git a/include/asm-generic/export.h b/include/asm-generic/export.h index 68efb950a918..294d6ae785d4 100644 --- a/include/asm-generic/export.h +++ b/include/asm-generic/export.h @@ -5,12 +5,10 @@ #define KSYM_FUNC(x) x #endif #ifdef CONFIG_64BIT -#define __put .quad #ifndef KSYM_ALIGN #define KSYM_ALIGN 8 #endif #else -#define __put .long #ifndef KSYM_ALIGN #define KSYM_ALIGN 4 #endif @@ -19,6 +17,16 @@ #define KCRC_ALIGN 4 #endif +.macro __put, val, name +#ifdef CONFIG_HAVE_ARCH_PREL32_RELOCATIONS + .long \val - ., \name - . +#elif defined(CONFIG_64BIT) + .quad \val, \name +#else + .long \val, \name +#endif +.endm + /* * note on .section use: @progbits vs %progbits nastiness doesn't matter, * since we immediately emit into those sections anyway. @@ -51,16 +59,19 @@ __kcrctab_\name: .endm #undef __put -#if defined(__KSYM_DEPS__) - -#define __EXPORT_SYMBOL(sym, val, sec) === __KSYM_##sym === - -#elif defined(CONFIG_TRIM_UNUSED_KSYMS) +#if defined(CONFIG_TRIM_UNUSED_KSYMS) #include <linux/kconfig.h> #include <generated/autoksyms.h> +.macro __ksym_marker sym + .section ".discard.ksym","a" +__ksym_marker_\sym: + .previous +.endm + #define __EXPORT_SYMBOL(sym, val, sec) \ + __ksym_marker sym; \ __cond_export_sym(sym, val, sec, __is_defined(__KSYM_##sym)) #define __cond_export_sym(sym, val, sec, conf) \ ___cond_export_sym(sym, val, sec, conf) diff --git a/include/asm-generic/fixmap.h b/include/asm-generic/fixmap.h index 827e4d3bbc7a..8cc7b09c1bc7 100644 --- a/include/asm-generic/fixmap.h +++ b/include/asm-generic/fixmap.h @@ -16,6 +16,7 @@ #define __ASM_GENERIC_FIXMAP_H #include <linux/bug.h> +#include <linux/mm_types.h> #define __fix_to_virt(x) (FIXADDR_TOP - ((x) << PAGE_SHIFT)) #define __virt_to_fix(x) ((FIXADDR_TOP - ((x)&PAGE_MASK)) >> PAGE_SHIFT) diff --git a/include/asm-generic/hugetlb.h b/include/asm-generic/hugetlb.h index 9d0cde8ab716..71d7b77eea50 100644 --- a/include/asm-generic/hugetlb.h +++ b/include/asm-generic/hugetlb.h @@ -32,7 +32,7 @@ static inline pte_t huge_pte_modify(pte_t pte, pgprot_t newprot) return pte_modify(pte, newprot); } -#ifndef huge_pte_clear +#ifndef __HAVE_ARCH_HUGE_PTE_CLEAR static inline void huge_pte_clear(struct mm_struct *mm, unsigned long addr, pte_t *ptep, unsigned long sz) { @@ -40,4 +40,90 @@ static inline void huge_pte_clear(struct mm_struct *mm, unsigned long addr, } #endif +#ifndef __HAVE_ARCH_HUGETLB_FREE_PGD_RANGE +static inline void hugetlb_free_pgd_range(struct mmu_gather *tlb, + unsigned long addr, unsigned long end, + unsigned long floor, unsigned long ceiling) +{ + free_pgd_range(tlb, addr, end, floor, ceiling); +} +#endif + +#ifndef __HAVE_ARCH_HUGE_SET_HUGE_PTE_AT +static inline void set_huge_pte_at(struct mm_struct *mm, unsigned long addr, + pte_t *ptep, pte_t pte) +{ + set_pte_at(mm, addr, ptep, pte); +} +#endif + +#ifndef __HAVE_ARCH_HUGE_PTEP_GET_AND_CLEAR +static inline pte_t huge_ptep_get_and_clear(struct mm_struct *mm, + unsigned long addr, pte_t *ptep) +{ + return ptep_get_and_clear(mm, addr, ptep); +} +#endif + +#ifndef __HAVE_ARCH_HUGE_PTEP_CLEAR_FLUSH +static inline void huge_ptep_clear_flush(struct vm_area_struct *vma, + unsigned long addr, pte_t *ptep) +{ + ptep_clear_flush(vma, addr, ptep); +} +#endif + +#ifndef __HAVE_ARCH_HUGE_PTE_NONE +static inline int huge_pte_none(pte_t pte) +{ + return pte_none(pte); +} +#endif + +#ifndef __HAVE_ARCH_HUGE_PTE_WRPROTECT +static inline pte_t huge_pte_wrprotect(pte_t pte) +{ + return pte_wrprotect(pte); +} +#endif + +#ifndef __HAVE_ARCH_PREPARE_HUGEPAGE_RANGE +static inline int prepare_hugepage_range(struct file *file, + unsigned long addr, unsigned long len) +{ + struct hstate *h = hstate_file(file); + + if (len & ~huge_page_mask(h)) + return -EINVAL; + if (addr & ~huge_page_mask(h)) + return -EINVAL; + + return 0; +} +#endif + +#ifndef __HAVE_ARCH_HUGE_PTEP_SET_WRPROTECT +static inline void huge_ptep_set_wrprotect(struct mm_struct *mm, + unsigned long addr, pte_t *ptep) +{ + ptep_set_wrprotect(mm, addr, ptep); +} +#endif + +#ifndef __HAVE_ARCH_HUGE_PTEP_SET_ACCESS_FLAGS +static inline int huge_ptep_set_access_flags(struct vm_area_struct *vma, + unsigned long addr, pte_t *ptep, + pte_t pte, int dirty) +{ + return ptep_set_access_flags(vma, addr, ptep, pte, dirty); +} +#endif + +#ifndef __HAVE_ARCH_HUGE_PTEP_GET +static inline pte_t huge_ptep_get(pte_t *ptep) +{ + return *ptep; +} +#endif + #endif /* _ASM_GENERIC_HUGETLB_H */ diff --git a/include/asm-generic/io.h b/include/asm-generic/io.h index 66d1d45fa2e1..d356f802945a 100644 --- a/include/asm-generic/io.h +++ b/include/asm-generic/io.h @@ -1026,7 +1026,8 @@ static inline void __iomem *ioremap_wt(phys_addr_t offset, size_t size) #define ioport_map ioport_map static inline void __iomem *ioport_map(unsigned long port, unsigned int nr) { - return PCI_IOBASE + (port & MMIO_UPPER_LIMIT); + port &= IO_SPACE_LIMIT; + return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port; } #endif diff --git a/include/asm-generic/percpu.h b/include/asm-generic/percpu.h index 1817a8415a5e..c2de013b2cf4 100644 --- a/include/asm-generic/percpu.h +++ b/include/asm-generic/percpu.h @@ -62,10 +62,6 @@ extern void setup_per_cpu_areas(void); #define PER_CPU_ATTRIBUTES #endif -#ifndef PER_CPU_DEF_ATTRIBUTES -#define PER_CPU_DEF_ATTRIBUTES -#endif - #define raw_cpu_generic_read(pcp) \ ({ \ *raw_cpu_ptr(&(pcp)); \ diff --git a/include/asm-generic/pgtable-nop4d-hack.h b/include/asm-generic/pgtable-nop4d-hack.h index 0c34215263b8..829bdb0d6327 100644 --- a/include/asm-generic/pgtable-nop4d-hack.h +++ b/include/asm-generic/pgtable-nop4d-hack.h @@ -5,7 +5,7 @@ #ifndef __ASSEMBLY__ #include <asm-generic/5level-fixup.h> -#define __PAGETABLE_PUD_FOLDED +#define __PAGETABLE_PUD_FOLDED 1 /* * Having the pud type consist of a pgd gets the size right, and allows @@ -31,6 +31,7 @@ static inline void pgd_clear(pgd_t *pgd) { } #define pud_ERROR(pud) (pgd_ERROR((pud).pgd)) #define pgd_populate(mm, pgd, pud) do { } while (0) +#define pgd_populate_safe(mm, pgd, pud) do { } while (0) /* * (puds are folded into pgds so this doesn't get actually called, * but the define is needed for a generic inline function.) diff --git a/include/asm-generic/pgtable-nop4d.h b/include/asm-generic/pgtable-nop4d.h index 1a29b2a0282b..aebab905e6cd 100644 --- a/include/asm-generic/pgtable-nop4d.h +++ b/include/asm-generic/pgtable-nop4d.h @@ -4,7 +4,7 @@ #ifndef __ASSEMBLY__ -#define __PAGETABLE_P4D_FOLDED +#define __PAGETABLE_P4D_FOLDED 1 typedef struct { pgd_t pgd; } p4d_t; @@ -26,6 +26,7 @@ static inline void pgd_clear(pgd_t *pgd) { } #define p4d_ERROR(p4d) (pgd_ERROR((p4d).pgd)) #define pgd_populate(mm, pgd, p4d) do { } while (0) +#define pgd_populate_safe(mm, pgd, p4d) do { } while (0) /* * (p4ds are folded into pgds so this doesn't get actually called, * but the define is needed for a generic inline function.) diff --git a/include/asm-generic/pgtable-nopmd.h b/include/asm-generic/pgtable-nopmd.h index f35f6e8149e4..b85b8271a73d 100644 --- a/include/asm-generic/pgtable-nopmd.h +++ b/include/asm-generic/pgtable-nopmd.h @@ -8,7 +8,7 @@ struct mm_struct; -#define __PAGETABLE_PMD_FOLDED +#define __PAGETABLE_PMD_FOLDED 1 /* * Having the pmd type consist of a pud gets the size right, and allows diff --git a/include/asm-generic/pgtable-nopud.h b/include/asm-generic/pgtable-nopud.h index e950b9c50f34..c77a1d301155 100644 --- a/include/asm-generic/pgtable-nopud.h +++ b/include/asm-generic/pgtable-nopud.h @@ -9,7 +9,7 @@ #else #include <asm-generic/pgtable-nop4d.h> -#define __PAGETABLE_PUD_FOLDED +#define __PAGETABLE_PUD_FOLDED 1 /* * Having the pud type consist of a p4d gets the size right, and allows @@ -35,6 +35,7 @@ static inline void p4d_clear(p4d_t *p4d) { } #define pud_ERROR(pud) (p4d_ERROR((pud).p4d)) #define p4d_populate(mm, p4d, pud) do { } while (0) +#define p4d_populate_safe(mm, p4d, pud) do { } while (0) /* * (puds are folded into p4ds so this doesn't get actually called, * but the define is needed for a generic inline function.) diff --git a/include/asm-generic/pgtable.h b/include/asm-generic/pgtable.h index 88ebc6102c7c..05e61e6c843f 100644 --- a/include/asm-generic/pgtable.h +++ b/include/asm-generic/pgtable.h @@ -375,7 +375,6 @@ static inline int pte_unused(pte_t pte) #endif #ifndef __HAVE_ARCH_PMD_SAME -#ifdef CONFIG_TRANSPARENT_HUGEPAGE static inline int pmd_same(pmd_t pmd_a, pmd_t pmd_b) { return pmd_val(pmd_a) == pmd_val(pmd_b); @@ -385,21 +384,60 @@ static inline int pud_same(pud_t pud_a, pud_t pud_b) { return pud_val(pud_a) == pud_val(pud_b); } -#else /* CONFIG_TRANSPARENT_HUGEPAGE */ -static inline int pmd_same(pmd_t pmd_a, pmd_t pmd_b) +#endif + +#ifndef __HAVE_ARCH_P4D_SAME +static inline int p4d_same(p4d_t p4d_a, p4d_t p4d_b) { - BUILD_BUG(); - return 0; + return p4d_val(p4d_a) == p4d_val(p4d_b); } +#endif -static inline int pud_same(pud_t pud_a, pud_t pud_b) +#ifndef __HAVE_ARCH_PGD_SAME +static inline int pgd_same(pgd_t pgd_a, pgd_t pgd_b) { - BUILD_BUG(); - return 0; + return pgd_val(pgd_a) == pgd_val(pgd_b); } -#endif /* CONFIG_TRANSPARENT_HUGEPAGE */ #endif +/* + * Use set_p*_safe(), and elide TLB flushing, when confident that *no* + * TLB flush will be required as a result of the "set". For example, use + * in scenarios where it is known ahead of time that the routine is + * setting non-present entries, or re-setting an existing entry to the + * same value. Otherwise, use the typical "set" helpers and flush the + * TLB. + */ +#define set_pte_safe(ptep, pte) \ +({ \ + WARN_ON_ONCE(pte_present(*ptep) && !pte_same(*ptep, pte)); \ + set_pte(ptep, pte); \ +}) + +#define set_pmd_safe(pmdp, pmd) \ +({ \ + WARN_ON_ONCE(pmd_present(*pmdp) && !pmd_same(*pmdp, pmd)); \ + set_pmd(pmdp, pmd); \ +}) + +#define set_pud_safe(pudp, pud) \ +({ \ + WARN_ON_ONCE(pud_present(*pudp) && !pud_same(*pudp, pud)); \ + set_pud(pudp, pud); \ +}) + +#define set_p4d_safe(p4dp, p4d) \ +({ \ + WARN_ON_ONCE(p4d_present(*p4dp) && !p4d_same(*p4dp, p4d)); \ + set_p4d(p4dp, p4d); \ +}) + +#define set_pgd_safe(pgdp, pgd) \ +({ \ + WARN_ON_ONCE(pgd_present(*pgdp) && !pgd_same(*pgdp, pgd)); \ + set_pgd(pgdp, pgd); \ +}) + #ifndef __HAVE_ARCH_DO_SWAP_PAGE /* * Some architectures support metadata associated with a page. When a @@ -757,7 +795,7 @@ static inline pmd_t pmd_swp_clear_soft_dirty(pmd_t pmd) /* * Interfaces that can be used by architecture code to keep track of * memory type of pfn mappings specified by the remap_pfn_range, - * vm_insert_pfn. + * vmf_insert_pfn. */ /* @@ -773,7 +811,7 @@ static inline int track_pfn_remap(struct vm_area_struct *vma, pgprot_t *prot, /* * track_pfn_insert is called when a _new_ single pfn is established - * by vm_insert_pfn(). + * by vmf_insert_pfn(). */ static inline void track_pfn_insert(struct vm_area_struct *vma, pgprot_t *prot, pfn_t pfn) @@ -1019,6 +1057,7 @@ int pud_set_huge(pud_t *pud, phys_addr_t addr, pgprot_t prot); int pmd_set_huge(pmd_t *pmd, phys_addr_t addr, pgprot_t prot); int pud_clear_huge(pud_t *pud); int pmd_clear_huge(pmd_t *pmd); +int p4d_free_pud_page(p4d_t *p4d, unsigned long addr); int pud_free_pmd_page(pud_t *pud, unsigned long addr); int pmd_free_pte_page(pmd_t *pmd, unsigned long addr); #else /* !CONFIG_HAVE_ARCH_HUGE_VMAP */ @@ -1046,6 +1085,10 @@ static inline int pmd_clear_huge(pmd_t *pmd) { return 0; } +static inline int p4d_free_pud_page(p4d_t *p4d, unsigned long addr) +{ + return 0; +} static inline int pud_free_pmd_page(pud_t *pud, unsigned long addr) { return 0; @@ -1127,4 +1170,20 @@ static inline bool arch_has_pfn_modify_check(void) #endif #endif +/* + * On some architectures it depends on the mm if the p4d/pud or pmd + * layer of the page table hierarchy is folded or not. + */ +#ifndef mm_p4d_folded +#define mm_p4d_folded(mm) __is_defined(__PAGETABLE_P4D_FOLDED) +#endif + +#ifndef mm_pud_folded +#define mm_pud_folded(mm) __is_defined(__PAGETABLE_PUD_FOLDED) +#endif + +#ifndef mm_pmd_folded +#define mm_pmd_folded(mm) __is_defined(__PAGETABLE_PMD_FOLDED) +#endif + #endif /* _ASM_GENERIC_PGTABLE_H */ diff --git a/include/asm-generic/qrwlock.h b/include/asm-generic/qrwlock.h index 0f7062bd55e5..36254d2da8e0 100644 --- a/include/asm-generic/qrwlock.h +++ b/include/asm-generic/qrwlock.h @@ -71,8 +71,8 @@ static inline int queued_write_trylock(struct qrwlock *lock) if (unlikely(cnts)) return 0; - return likely(atomic_cmpxchg_acquire(&lock->cnts, - cnts, cnts | _QW_LOCKED) == cnts); + return likely(atomic_try_cmpxchg_acquire(&lock->cnts, &cnts, + _QW_LOCKED)); } /** * queued_read_lock - acquire read lock of a queue rwlock @@ -96,8 +96,9 @@ static inline void queued_read_lock(struct qrwlock *lock) */ static inline void queued_write_lock(struct qrwlock *lock) { + u32 cnts = 0; /* Optimize for the unfair lock case where the fair flag is 0. */ - if (atomic_cmpxchg_acquire(&lock->cnts, 0, _QW_LOCKED) == 0) + if (likely(atomic_try_cmpxchg_acquire(&lock->cnts, &cnts, _QW_LOCKED))) return; queued_write_lock_slowpath(lock); diff --git a/include/asm-generic/qspinlock.h b/include/asm-generic/qspinlock.h index 9cc457597ddf..7541fa707f5b 100644 --- a/include/asm-generic/qspinlock.h +++ b/include/asm-generic/qspinlock.h @@ -66,10 +66,12 @@ static __always_inline int queued_spin_is_contended(struct qspinlock *lock) */ static __always_inline int queued_spin_trylock(struct qspinlock *lock) { - if (!atomic_read(&lock->val) && - (atomic_cmpxchg_acquire(&lock->val, 0, _Q_LOCKED_VAL) == 0)) - return 1; - return 0; + u32 val = atomic_read(&lock->val); + + if (unlikely(val)) + return 0; + + return likely(atomic_try_cmpxchg_acquire(&lock->val, &val, _Q_LOCKED_VAL)); } extern void queued_spin_lock_slowpath(struct qspinlock *lock, u32 val); @@ -80,11 +82,11 @@ extern void queued_spin_lock_slowpath(struct qspinlock *lock, u32 val); */ static __always_inline void queued_spin_lock(struct qspinlock *lock) { - u32 val; + u32 val = 0; - val = atomic_cmpxchg_acquire(&lock->val, 0, _Q_LOCKED_VAL); - if (likely(val == 0)) + if (likely(atomic_try_cmpxchg_acquire(&lock->val, &val, _Q_LOCKED_VAL))) return; + queued_spin_lock_slowpath(lock, val); } diff --git a/include/asm-generic/sections.h b/include/asm-generic/sections.h index 849cd8eb5ca0..d79abca81a52 100644 --- a/include/asm-generic/sections.h +++ b/include/asm-generic/sections.h @@ -141,4 +141,18 @@ static inline bool init_section_intersects(void *virt, size_t size) return memory_intersects(__init_begin, __init_end, virt, size); } +/** + * is_kernel_rodata - checks if the pointer address is located in the + * .rodata section + * + * @addr: address to check + * + * Returns: true if the address is located in .rodata, false otherwise. + */ +static inline bool is_kernel_rodata(unsigned long addr) +{ + return addr >= (unsigned long)__start_rodata && + addr < (unsigned long)__end_rodata; +} + #endif /* _ASM_GENERIC_SECTIONS_H_ */ diff --git a/include/asm-generic/tlb.h b/include/asm-generic/tlb.h index e811ef7b8350..6be86c1c5c58 100644 --- a/include/asm-generic/tlb.h +++ b/include/asm-generic/tlb.h @@ -15,10 +15,13 @@ #ifndef _ASM_GENERIC__TLB_H #define _ASM_GENERIC__TLB_H +#include <linux/mmu_notifier.h> #include <linux/swap.h> #include <asm/pgalloc.h> #include <asm/tlbflush.h> +#ifdef CONFIG_MMU + #ifdef CONFIG_HAVE_RCU_TABLE_FREE /* * Semi RCU freeing of the page directories. @@ -96,12 +99,30 @@ struct mmu_gather { #endif unsigned long start; unsigned long end; - /* we are in the middle of an operation to clear - * a full mm and can make some optimizations */ - unsigned int fullmm : 1, - /* we have performed an operation which - * requires a complete flush of the tlb */ - need_flush_all : 1; + /* + * we are in the middle of an operation to clear + * a full mm and can make some optimizations + */ + unsigned int fullmm : 1; + + /* + * we have performed an operation which + * requires a complete flush of the tlb + */ + unsigned int need_flush_all : 1; + + /* + * we have removed page directories + */ + unsigned int freed_tables : 1; + + /* + * at which levels have we cleared entries? + */ + unsigned int cleared_ptes : 1; + unsigned int cleared_pmds : 1; + unsigned int cleared_puds : 1; + unsigned int cleared_p4ds : 1; struct mmu_gather_batch *active; struct mmu_gather_batch local; @@ -117,6 +138,7 @@ void arch_tlb_gather_mmu(struct mmu_gather *tlb, void tlb_flush_mmu(struct mmu_gather *tlb); void arch_tlb_finish_mmu(struct mmu_gather *tlb, unsigned long start, unsigned long end, bool force); +void tlb_flush_mmu_free(struct mmu_gather *tlb); extern bool __tlb_remove_page_size(struct mmu_gather *tlb, struct page *page, int page_size); @@ -136,6 +158,21 @@ static inline void __tlb_reset_range(struct mmu_gather *tlb) tlb->start = TASK_SIZE; tlb->end = 0; } + tlb->freed_tables = 0; + tlb->cleared_ptes = 0; + tlb->cleared_pmds = 0; + tlb->cleared_puds = 0; + tlb->cleared_p4ds = 0; +} + +static inline void tlb_flush_mmu_tlbonly(struct mmu_gather *tlb) +{ + if (!tlb->end) + return; + + tlb_flush(tlb); + mmu_notifier_invalidate_range(tlb->mm, tlb->start, tlb->end); + __tlb_reset_range(tlb); } static inline void tlb_remove_page_size(struct mmu_gather *tlb, @@ -175,6 +212,25 @@ static inline void tlb_remove_check_page_size_change(struct mmu_gather *tlb, } #endif +static inline unsigned long tlb_get_unmap_shift(struct mmu_gather *tlb) +{ + if (tlb->cleared_ptes) + return PAGE_SHIFT; + if (tlb->cleared_pmds) + return PMD_SHIFT; + if (tlb->cleared_puds) + return PUD_SHIFT; + if (tlb->cleared_p4ds) + return P4D_SHIFT; + + return PAGE_SHIFT; +} + +static inline unsigned long tlb_get_unmap_size(struct mmu_gather *tlb) +{ + return 1UL << tlb_get_unmap_shift(tlb); +} + /* * In the case of tlb vma handling, we can optimise these away in the * case where we're doing a full MM flush. When we're doing a munmap, @@ -186,10 +242,8 @@ static inline void tlb_remove_check_page_size_change(struct mmu_gather *tlb, #define __tlb_end_vma(tlb, vma) \ do { \ - if (!tlb->fullmm && tlb->end) { \ - tlb_flush(tlb); \ - __tlb_reset_range(tlb); \ - } \ + if (!tlb->fullmm) \ + tlb_flush_mmu_tlbonly(tlb); \ } while (0) #ifndef tlb_end_vma @@ -210,13 +264,19 @@ static inline void tlb_remove_check_page_size_change(struct mmu_gather *tlb, #define tlb_remove_tlb_entry(tlb, ptep, address) \ do { \ __tlb_adjust_range(tlb, address, PAGE_SIZE); \ + tlb->cleared_ptes = 1; \ __tlb_remove_tlb_entry(tlb, ptep, address); \ } while (0) -#define tlb_remove_huge_tlb_entry(h, tlb, ptep, address) \ - do { \ - __tlb_adjust_range(tlb, address, huge_page_size(h)); \ - __tlb_remove_tlb_entry(tlb, ptep, address); \ +#define tlb_remove_huge_tlb_entry(h, tlb, ptep, address) \ + do { \ + unsigned long _sz = huge_page_size(h); \ + __tlb_adjust_range(tlb, address, _sz); \ + if (_sz == PMD_SIZE) \ + tlb->cleared_pmds = 1; \ + else if (_sz == PUD_SIZE) \ + tlb->cleared_puds = 1; \ + __tlb_remove_tlb_entry(tlb, ptep, address); \ } while (0) /** @@ -230,6 +290,7 @@ static inline void tlb_remove_check_page_size_change(struct mmu_gather *tlb, #define tlb_remove_pmd_tlb_entry(tlb, pmdp, address) \ do { \ __tlb_adjust_range(tlb, address, HPAGE_PMD_SIZE); \ + tlb->cleared_pmds = 1; \ __tlb_remove_pmd_tlb_entry(tlb, pmdp, address); \ } while (0) @@ -244,6 +305,7 @@ static inline void tlb_remove_check_page_size_change(struct mmu_gather *tlb, #define tlb_remove_pud_tlb_entry(tlb, pudp, address) \ do { \ __tlb_adjust_range(tlb, address, HPAGE_PUD_SIZE); \ + tlb->cleared_puds = 1; \ __tlb_remove_pud_tlb_entry(tlb, pudp, address); \ } while (0) @@ -269,6 +331,8 @@ static inline void tlb_remove_check_page_size_change(struct mmu_gather *tlb, #define pte_free_tlb(tlb, ptep, address) \ do { \ __tlb_adjust_range(tlb, address, PAGE_SIZE); \ + tlb->freed_tables = 1; \ + tlb->cleared_pmds = 1; \ __pte_free_tlb(tlb, ptep, address); \ } while (0) #endif @@ -276,7 +340,9 @@ static inline void tlb_remove_check_page_size_change(struct mmu_gather *tlb, #ifndef pmd_free_tlb #define pmd_free_tlb(tlb, pmdp, address) \ do { \ - __tlb_adjust_range(tlb, address, PAGE_SIZE); \ + __tlb_adjust_range(tlb, address, PAGE_SIZE); \ + tlb->freed_tables = 1; \ + tlb->cleared_puds = 1; \ __pmd_free_tlb(tlb, pmdp, address); \ } while (0) #endif @@ -286,6 +352,8 @@ static inline void tlb_remove_check_page_size_change(struct mmu_gather *tlb, #define pud_free_tlb(tlb, pudp, address) \ do { \ __tlb_adjust_range(tlb, address, PAGE_SIZE); \ + tlb->freed_tables = 1; \ + tlb->cleared_p4ds = 1; \ __pud_free_tlb(tlb, pudp, address); \ } while (0) #endif @@ -295,22 +363,15 @@ static inline void tlb_remove_check_page_size_change(struct mmu_gather *tlb, #ifndef p4d_free_tlb #define p4d_free_tlb(tlb, pudp, address) \ do { \ - __tlb_adjust_range(tlb, address, PAGE_SIZE); \ + __tlb_adjust_range(tlb, address, PAGE_SIZE); \ + tlb->freed_tables = 1; \ __p4d_free_tlb(tlb, pudp, address); \ } while (0) #endif #endif -#define tlb_migrate_finish(mm) do {} while (0) +#endif /* CONFIG_MMU */ -/* - * Used to flush the TLB when page tables are removed, when lazy - * TLB mode may cause a CPU to retain intermediate translations - * pointing to about-to-be-freed page table memory. - */ -#ifndef HAVE_TLB_FLUSH_REMOVE_TABLES -#define tlb_flush_remove_tables(mm) do {} while (0) -#define tlb_flush_remove_tables_local(mm) do {} while (0) -#endif +#define tlb_migrate_finish(mm) do {} while (0) #endif /* _ASM_GENERIC__TLB_H */ diff --git a/include/asm-generic/uaccess.h b/include/asm-generic/uaccess.h index 6b2e63df2739..d82c78a79da5 100644 --- a/include/asm-generic/uaccess.h +++ b/include/asm-generic/uaccess.h @@ -35,7 +35,7 @@ static inline void set_fs(mm_segment_t fs) #define segment_eq(a, b) ((a).seg == (b).seg) #endif -#define access_ok(type, addr, size) __access_ok((unsigned long)(addr),(size)) +#define access_ok(addr, size) __access_ok((unsigned long)(addr),(size)) /* * The architecture should really override this if possible, at least @@ -78,7 +78,7 @@ static inline int __access_ok(unsigned long addr, unsigned long size) ({ \ void __user *__p = (ptr); \ might_fault(); \ - access_ok(VERIFY_WRITE, __p, sizeof(*ptr)) ? \ + access_ok(__p, sizeof(*ptr)) ? \ __put_user((x), ((__typeof__(*(ptr)) __user *)__p)) : \ -EFAULT; \ }) @@ -140,7 +140,7 @@ extern int __put_user_bad(void) __attribute__((noreturn)); ({ \ const void __user *__p = (ptr); \ might_fault(); \ - access_ok(VERIFY_READ, __p, sizeof(*ptr)) ? \ + access_ok(__p, sizeof(*ptr)) ? \ __get_user((x), (__typeof__(*(ptr)) __user *)__p) :\ ((x) = (__typeof__(*(ptr)))0,-EFAULT); \ }) @@ -175,7 +175,7 @@ __strncpy_from_user(char *dst, const char __user *src, long count) static inline long strncpy_from_user(char *dst, const char __user *src, long count) { - if (!access_ok(VERIFY_READ, src, 1)) + if (!access_ok(src, 1)) return -EFAULT; return __strncpy_from_user(dst, src, count); } @@ -196,7 +196,7 @@ strncpy_from_user(char *dst, const char __user *src, long count) */ static inline long strnlen_user(const char __user *src, long n) { - if (!access_ok(VERIFY_READ, src, 1)) + if (!access_ok(src, 1)) return 0; return __strnlen_user(src, n); } @@ -217,7 +217,7 @@ static inline __must_check unsigned long clear_user(void __user *to, unsigned long n) { might_fault(); - if (!access_ok(VERIFY_WRITE, to, n)) + if (!access_ok(to, n)) return n; return __clear_user(to, n); diff --git a/include/asm-generic/unistd.h b/include/asm-generic/unistd.h deleted file mode 100644 index cdf904265caf..000000000000 --- a/include/asm-generic/unistd.h +++ /dev/null @@ -1,13 +0,0 @@ -/* SPDX-License-Identifier: GPL-2.0 */ -#include <uapi/asm-generic/unistd.h> -#include <linux/export.h> - -/* - * These are required system calls, we should - * invert the logic eventually and let them - * be selected by default. - */ -#if __BITS_PER_LONG == 32 -#define __ARCH_WANT_STAT64 -#define __ARCH_WANT_SYS_LLSEEK -#endif diff --git a/include/asm-generic/vmlinux.lds.h b/include/asm-generic/vmlinux.lds.h index f173b5f30dbe..3d7a6a9c2370 100644 --- a/include/asm-generic/vmlinux.lds.h +++ b/include/asm-generic/vmlinux.lds.h @@ -54,8 +54,6 @@ #define LOAD_OFFSET 0 #endif -#include <linux/export.h> - /* Align . to a 8 byte boundary equals to maximum function alignment. */ #define ALIGN_FUNCTION() . = ALIGN(8) @@ -70,7 +68,7 @@ */ #ifdef CONFIG_LD_DEAD_CODE_DATA_ELIMINATION #define TEXT_MAIN .text .text.[0-9a-zA-Z_]* -#define DATA_MAIN .data .data.[0-9a-zA-Z_]* +#define DATA_MAIN .data .data.[0-9a-zA-Z_]* .data..LPBX* #define SDATA_MAIN .sdata .sdata.[0-9a-zA-Z_]* #define RODATA_MAIN .rodata .rodata.[0-9a-zA-Z_]* #define BSS_MAIN .bss .bss.[0-9a-zA-Z_]* @@ -205,6 +203,15 @@ #define EARLYCON_TABLE() #endif +#ifdef CONFIG_SECURITY +#define LSM_TABLE() . = ALIGN(8); \ + __start_lsm_info = .; \ + KEEP(*(.lsm_info.init)) \ + __end_lsm_info = .; +#else +#define LSM_TABLE() +#endif + #define ___OF_TABLE(cfg, name) _OF_TABLE_##cfg(name) #define __OF_TABLE(cfg, name) ___OF_TABLE(cfg, name) #define OF_TABLE(cfg, name) __OF_TABLE(IS_ENABLED(cfg), name) @@ -255,10 +262,6 @@ STRUCT_ALIGN(); \ *(__tracepoints) \ /* implement dynamic printk debug */ \ - . = ALIGN(8); \ - __start___jump_table = .; \ - KEEP(*(__jump_table)) \ - __stop___jump_table = .; \ . = ALIGN(8); \ __start___verbose = .; \ KEEP(*(__verbose)) \ @@ -302,6 +305,12 @@ . = __start_init_task + THREAD_SIZE; \ __end_init_task = .; +#define JUMP_TABLE_DATA \ + . = ALIGN(8); \ + __start___jump_table = .; \ + KEEP(*(__jump_table)) \ + __stop___jump_table = .; + /* * Allow architectures to handle ro_after_init data on their * own by defining an empty RO_AFTER_INIT_DATA. @@ -310,6 +319,7 @@ #define RO_AFTER_INIT_DATA \ __start_ro_after_init = .; \ *(.data..ro_after_init) \ + JUMP_TABLE_DATA \ __end_ro_after_init = .; #endif @@ -475,13 +485,6 @@ #define RODATA RO_DATA_SECTION(4096) #define RO_DATA(align) RO_DATA_SECTION(align) -#define SECURITY_INIT \ - .security_initcall.init : AT(ADDR(.security_initcall.init) - LOAD_OFFSET) { \ - __security_initcall_start = .; \ - KEEP(*(.security_initcall.init)) \ - __security_initcall_end = .; \ - } - /* * .text section. Map to function alignment to avoid address changes * during second ld run in second ld pass when generating System.map @@ -606,7 +609,8 @@ IRQCHIP_OF_MATCH_TABLE() \ ACPI_PROBE_TABLE(irqchip) \ ACPI_PROBE_TABLE(timer) \ - EARLYCON_TABLE() + EARLYCON_TABLE() \ + LSM_TABLE() #define INIT_TEXT \ *(.init.text .init.text.*) \ @@ -615,8 +619,8 @@ #define EXIT_DATA \ *(.exit.data .exit.data.*) \ - *(.fini_array) \ - *(.dtors) \ + *(.fini_array .fini_array.*) \ + *(.dtors .dtors.*) \ MEM_DISCARD(exit.data*) \ MEM_DISCARD(exit.rodata*) @@ -795,11 +799,6 @@ KEEP(*(.con_initcall.init)) \ __con_initcall_end = .; -#define SECURITY_INITCALL \ - __security_initcall_start = .; \ - KEEP(*(.security_initcall.init)) \ - __security_initcall_end = .; - #ifdef CONFIG_BLK_DEV_INITRD #define INIT_RAM_FS \ . = ALIGN(4); \ @@ -966,7 +965,6 @@ INIT_SETUP(initsetup_align) \ INIT_CALLS \ CON_INITCALL \ - SECURITY_INITCALL \ INIT_RAM_FS \ } |