include/linux/vmalloc.h

1 /* SPDX-License-Identifier: GPL-2.0 */
24 #define VM_MAP			0x00000004	/* vmap()ed pages */
28 #define VM_NO_GUARD		0x00000040      /* ***DANGEROUS*** don't add guard page */
31 #define VM_MAP_PUT_PAGES	0x00000200	/* put pages and free array in vfree */
32 #define VM_ALLOW_HUGE_VMAP	0x00000400      /* Allow for huge pages on archs with HAVE_ARCH_HUGE_VMA…
40 #define VM_SPARSE		0x00001000	/* sparse vm_area. not all pages are present. */
46  * Can be overridden by arch-specific value.
49 #define IOREMAP_MAX_ORDER	(7 + PAGE_SHIFT)	/* 128 pages */
57 	struct page		**pages;  member
132  *	Highlevel APIs for driver use
135 extern void *vm_map_ram(struct page **pages, unsigned int count, int node);
194 extern void *vmap(struct page **pages, unsigned int count,
207 		     struct page **pages, unsigned int page_shift);
226  *	Lowlevel-APIs (not for driver use!)
231 	if (!(area->flags & VM_NO_GUARD))  in get_vm_area_size()
232 		/* return actual size without guard page */  in get_vm_area_size()
233 		return area->size - PAGE_SIZE;  in get_vm_area_size()
235 		return area->size;  in get_vm_area_size()
256 	 * larger sizes are available but decides not to use them, nothing  in is_vm_area_hugepages()
261 	return find_vm_area(addr)->page_order > 0;  in is_vm_area_hugepages()
271  *	Internals.  Don't use..
280 #define VMALLOC_TOTAL (VMALLOC_END - VMALLOC_START)
285 		      unsigned long end, struct page **pages);
295 		vm->flags |= VM_FLUSH_RESET_PERMS;  in set_vm_flush_reset_perms()