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(I'm so sorry!) Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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#include <linux/alloc_tag.h>#include <linux/sched.h>#include <linux/spinlock.h>#include <linux/init.h>#include <linux/list.h>#include <linux/llist.h>#include <asm/page.h> /* pgprot_t */#include <linux/rbtree.h>#include <linux/overflow.h>
#include <asm/vmalloc.h>
struct vm_area_struct; /* vma defining user mapping in mm_types.h */struct notifier_block; /* in notifier.h */struct iov_iter; /* in uio.h */
/* bits in flags of vmalloc's vm_struct below */#define VM_IOREMAP 0x00000001 /* ioremap() and friends */#define VM_ALLOC 0x00000002 /* vmalloc() */#define VM_MAP 0x00000004 /* vmap()ed pages */#define VM_USERMAP 0x00000008 /* suitable for remap_vmalloc_range */#define VM_DMA_COHERENT 0x00000010 /* dma_alloc_coherent */#define VM_UNINITIALIZED 0x00000020 /* vm_struct is not fully initialized */#define VM_NO_GUARD 0x00000040 /* ***DANGEROUS*** don't add guard page */#define VM_KASAN 0x00000080 /* has allocated kasan shadow memory */#define VM_FLUSH_RESET_PERMS 0x00000100 /* reset direct map and flush TLB on unmap, can't be freed in atomic context */#define VM_MAP_PUT_PAGES 0x00000200 /* put pages and free array in vfree */#define VM_ALLOW_HUGE_VMAP 0x00000400 /* Allow for huge pages on archs with HAVE_ARCH_HUGE_VMALLOC */
#if (defined(CONFIG_KASAN_GENERIC) || defined(CONFIG_KASAN_SW_TAGS)) && \ !defined(CONFIG_KASAN_VMALLOC)#define VM_DEFER_KMEMLEAK 0x00000800 /* defer kmemleak object creation */#else#define VM_DEFER_KMEMLEAK 0#endif#define VM_SPARSE 0x00001000 /* sparse vm_area. not all pages are present. */
/* bits [20..32] reserved for arch specific ioremap internals */
/* * Maximum alignment for ioremap() regions. * Can be overridden by arch-specific value. */#ifndef IOREMAP_MAX_ORDER#define IOREMAP_MAX_ORDER (7 + PAGE_SHIFT) /* 128 pages */#endif
struct vm_struct { union { struct vm_struct *next; /* Early registration of vm_areas. */ struct llist_node llnode; /* Asynchronous freeing on error paths. */ };
void *addr; unsigned long size; unsigned long flags; struct page **pages;#ifdef CONFIG_HAVE_ARCH_HUGE_VMALLOC unsigned int page_order;#endif unsigned long nr_pages; phys_addr_t phys_addr; const void *caller; unsigned long requested_size;};
struct vmap_area { unsigned long va_start; unsigned long va_end;
struct rb_node rb_node; /* address sorted rbtree */ struct list_head list; /* address sorted list */
/* * The following two variables can be packed, because * a vmap_area object can be either: * 1) in "free" tree (root is free_vmap_area_root) * 2) or "busy" tree (root is vmap_area_root) */ union { unsigned long subtree_max_size; /* in "free" tree */ struct vm_struct *vm; /* in "busy" tree */ }; unsigned long flags; /* mark type of vm_map_ram area */};
/* archs that select HAVE_ARCH_HUGE_VMAP should override one or more of these */#ifndef arch_vmap_p4d_supportedstatic inline bool arch_vmap_p4d_supported(pgprot_t prot){ return false;}#endif
#ifndef arch_vmap_pud_supportedstatic inline bool arch_vmap_pud_supported(pgprot_t prot){ return false;}#endif
#ifndef arch_vmap_pmd_supportedstatic inline bool arch_vmap_pmd_supported(pgprot_t prot){ return false;}#endif
#ifndef arch_vmap_pte_range_map_sizestatic inline unsigned long arch_vmap_pte_range_map_size(unsigned long addr, unsigned long end, u64 pfn, unsigned int max_page_shift){ return PAGE_SIZE;}#endif
#ifndef arch_vmap_pte_range_unmap_sizestatic inline unsigned long arch_vmap_pte_range_unmap_size(unsigned long addr, pte_t *ptep){ return PAGE_SIZE;}#endif
#ifndef arch_vmap_pte_supported_shiftstatic inline int arch_vmap_pte_supported_shift(unsigned long size){ return PAGE_SHIFT;}#endif
#ifndef arch_vmap_pgprot_taggedstatic inline pgprot_t arch_vmap_pgprot_tagged(pgprot_t prot){ return prot;}#endif
/* * Highlevel APIs for driver use */extern void vm_unmap_ram(const void *mem, unsigned int count);extern void *vm_map_ram(struct page **pages, unsigned int count, int node);extern void vm_unmap_aliases(void);
extern void *vmalloc_noprof(unsigned long size) __alloc_size(1);#define vmalloc(...) alloc_hooks(vmalloc_noprof(__VA_ARGS__))
extern void *vzalloc_noprof(unsigned long size) __alloc_size(1);#define vzalloc(...) alloc_hooks(vzalloc_noprof(__VA_ARGS__))
extern void *vmalloc_user_noprof(unsigned long size) __alloc_size(1);#define vmalloc_user(...) alloc_hooks(vmalloc_user_noprof(__VA_ARGS__))
extern void *vmalloc_node_noprof(unsigned long size, int node) __alloc_size(1);#define vmalloc_node(...) alloc_hooks(vmalloc_node_noprof(__VA_ARGS__))
extern void *vzalloc_node_noprof(unsigned long size, int node) __alloc_size(1);#define vzalloc_node(...) alloc_hooks(vzalloc_node_noprof(__VA_ARGS__))
extern void *vmalloc_32_noprof(unsigned long size) __alloc_size(1);#define vmalloc_32(...) alloc_hooks(vmalloc_32_noprof(__VA_ARGS__))
extern void *vmalloc_32_user_noprof(unsigned long size) __alloc_size(1);#define vmalloc_32_user(...) alloc_hooks(vmalloc_32_user_noprof(__VA_ARGS__))
extern void *__vmalloc_noprof(unsigned long size, gfp_t gfp_mask) __alloc_size(1);#define __vmalloc(...) alloc_hooks(__vmalloc_noprof(__VA_ARGS__))
extern void *__vmalloc_node_range_noprof(unsigned long size, unsigned long align, unsigned long start, unsigned long end, gfp_t gfp_mask, pgprot_t prot, unsigned long vm_flags, int node, const void *caller) __alloc_size(1);#define __vmalloc_node_range(...) alloc_hooks(__vmalloc_node_range_noprof(__VA_ARGS__))
void *__vmalloc_node_noprof(unsigned long size, unsigned long align, gfp_t gfp_mask, int node, const void *caller) __alloc_size(1);#define __vmalloc_node(...) alloc_hooks(__vmalloc_node_noprof(__VA_ARGS__))
void *vmalloc_huge_node_noprof(unsigned long size, gfp_t gfp_mask, int node) __alloc_size(1);#define vmalloc_huge_node(...) alloc_hooks(vmalloc_huge_node_noprof(__VA_ARGS__))
static inline void *vmalloc_huge(unsigned long size, gfp_t gfp_mask){ return vmalloc_huge_node(size, gfp_mask, NUMA_NO_NODE);}
extern void *__vmalloc_array_noprof(size_t n, size_t size, gfp_t flags) __alloc_size(1, 2);#define __vmalloc_array(...) alloc_hooks(__vmalloc_array_noprof(__VA_ARGS__))
extern void *vmalloc_array_noprof(size_t n, size_t size) __alloc_size(1, 2);#define vmalloc_array(...) alloc_hooks(vmalloc_array_noprof(__VA_ARGS__))
extern void *__vcalloc_noprof(size_t n, size_t size, gfp_t flags) __alloc_size(1, 2);#define __vcalloc(...) alloc_hooks(__vcalloc_noprof(__VA_ARGS__))
extern void *vcalloc_noprof(size_t n, size_t size) __alloc_size(1, 2);#define vcalloc(...) alloc_hooks(vcalloc_noprof(__VA_ARGS__))
void *__must_check vrealloc_node_align_noprof(const void *p, size_t size, unsigned long align, gfp_t flags, int nid) __realloc_size(2);#define vrealloc_node_noprof(_p, _s, _f, _nid) \ vrealloc_node_align_noprof(_p, _s, 1, _f, _nid)#define vrealloc_noprof(_p, _s, _f) \ vrealloc_node_align_noprof(_p, _s, 1, _f, NUMA_NO_NODE)#define vrealloc_node_align(...) alloc_hooks(vrealloc_node_align_noprof(__VA_ARGS__))#define vrealloc_node(...) alloc_hooks(vrealloc_node_noprof(__VA_ARGS__))#define vrealloc(...) alloc_hooks(vrealloc_noprof(__VA_ARGS__))
extern void vfree(const void *addr);extern void vfree_atomic(const void *addr);
extern void *vmap(struct page **pages, unsigned int count, unsigned long flags, pgprot_t prot);void *vmap_pfn(unsigned long *pfns, unsigned int count, pgprot_t prot);extern void vunmap(const void *addr);
extern int remap_vmalloc_range_partial(struct vm_area_struct *vma, unsigned long uaddr, void *kaddr, unsigned long pgoff, unsigned long size);
extern int remap_vmalloc_range(struct vm_area_struct *vma, void *addr, unsigned long pgoff);
int vmap_pages_range(unsigned long addr, unsigned long end, pgprot_t prot, struct page **pages, unsigned int page_shift);
/* * Lowlevel-APIs (not for driver use!) */
static inline size_t get_vm_area_size(const struct vm_struct *area){ if (!(area->flags & VM_NO_GUARD)) /* return actual size without guard page */ return area->size - PAGE_SIZE; else return area->size;
}
extern struct vm_struct *get_vm_area(unsigned long size, unsigned long flags);extern struct vm_struct *get_vm_area_caller(unsigned long size, unsigned long flags, const void *caller);extern struct vm_struct *__get_vm_area_caller(unsigned long size, unsigned long flags, unsigned long start, unsigned long end, const void *caller);void free_vm_area(struct vm_struct *area);extern struct vm_struct *remove_vm_area(const void *addr);extern struct vm_struct *find_vm_area(const void *addr);struct vmap_area *find_vmap_area(unsigned long addr);
static inline bool is_vm_area_hugepages(const void *addr){ /* * This may not 100% tell if the area is mapped with > PAGE_SIZE * page table entries, if for some reason the architecture indicates * larger sizes are available but decides not to use them, nothing * prevents that. This only indicates the size of the physical page * allocated in the vmalloc layer. */#ifdef CONFIG_HAVE_ARCH_HUGE_VMALLOC struct vm_struct *area = find_vm_area(addr);
return area && area->page_order > 0;#else return false;#endif}
/* for /proc/kcore */long vread_iter(struct iov_iter *iter, const char *addr, size_t count);
/* * Internals. Don't use.. */__init void vm_area_add_early(struct vm_struct *vm);__init void vm_area_register_early(struct vm_struct *vm, size_t align);
int register_vmap_purge_notifier(struct notifier_block *nb);int unregister_vmap_purge_notifier(struct notifier_block *nb);
#ifdef CONFIG_MMU#define VMALLOC_TOTAL (VMALLOC_END - VMALLOC_START)
int vm_area_map_pages(struct vm_struct *area, unsigned long start, unsigned long end, struct page **pages);void vm_area_unmap_pages(struct vm_struct *area, unsigned long start, unsigned long end);void vunmap_range(unsigned long addr, unsigned long end);
static inline void set_vm_flush_reset_perms(void *addr){ struct vm_struct *vm = find_vm_area(addr);
if (vm) vm->flags |= VM_FLUSH_RESET_PERMS;}#else /* !CONFIG_MMU */#define VMALLOC_TOTAL 0UL
static inline void set_vm_flush_reset_perms(void *addr) {}#endif /* CONFIG_MMU */
#if defined(CONFIG_MMU) && defined(CONFIG_SMP)struct vm_struct **pcpu_get_vm_areas(const unsigned long *offsets, const size_t *sizes, int nr_vms, size_t align, gfp_t gfp);
void pcpu_free_vm_areas(struct vm_struct **vms, int nr_vms);# elsestatic inline struct vm_struct **pcpu_get_vm_areas(const unsigned long *offsets, const size_t *sizes, int nr_vms, size_t align, gfp_t gfp){ return NULL;}
static inline void pcpu_free_vm_areas(struct vm_struct **vms, int nr_vms) {}#endif
#if defined(CONFIG_MMU) && defined(CONFIG_PRINTK)bool vmalloc_dump_obj(void *object);#elsestatic inline bool vmalloc_dump_obj(void *object) { return false; }#endif
unsigned int memalloc_apply_gfp_scope(gfp_t gfp_mask);void memalloc_restore_scope(unsigned int flags);#endif /* _LINUX_VMALLOC_H */