#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_NO_HUGE_VMAP 0x00000400 /* force PAGE_SIZE pte mapping */
/*
* VM_KASAN is used slighly differently depending on CONFIG_KASAN_VMALLOC.
unsigned long size;
unsigned long flags;
struct page **pages;
+#ifdef CONFIG_HAVE_ARCH_HUGE_VMALLOC
+ unsigned int page_order;
+#endif
unsigned int nr_pages;
phys_addr_t phys_addr;
const void *caller;
};
};
+/* archs that select HAVE_ARCH_HUGE_VMAP should override one or more of these */
+#ifndef arch_vmap_p4d_supported
+static inline bool arch_vmap_p4d_supported(pgprot_t prot)
+{
+ return false;
+}
+#endif
+
+#ifndef arch_vmap_pud_supported
+static inline bool arch_vmap_pud_supported(pgprot_t prot)
+{
+ return false;
+}
+#endif
+
+#ifndef arch_vmap_pmd_supported
+static inline bool arch_vmap_pmd_supported(pgprot_t prot)
+{
+ return false;
+}
+#endif
+
/*
* Highlevel APIs for driver use
*/
extern struct vm_struct *remove_vm_area(const void *addr);
extern struct vm_struct *find_vm_area(const void *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
+ return find_vm_area(addr)->page_order > 0;
+#else
+ return false;
+#endif
+}
+
#ifdef CONFIG_MMU
-extern int map_kernel_range_noflush(unsigned long start, unsigned long size,
- pgprot_t prot, struct page **pages);
-int map_kernel_range(unsigned long start, unsigned long size, pgprot_t prot,
- struct page **pages);
-extern void unmap_kernel_range_noflush(unsigned long addr, unsigned long size);
-extern void unmap_kernel_range(unsigned long addr, unsigned long size);
+int vmap_range(unsigned long addr, unsigned long end,
+ phys_addr_t phys_addr, pgprot_t prot,
+ unsigned int max_page_shift);
+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
-static inline int
-map_kernel_range_noflush(unsigned long start, unsigned long size,
- pgprot_t prot, struct page **pages)
-{
- return size >> PAGE_SHIFT;
-}
-#define map_kernel_range map_kernel_range_noflush
-static inline void
-unmap_kernel_range_noflush(unsigned long addr, unsigned long size)
-{
-}
-#define unmap_kernel_range unmap_kernel_range_noflush
static inline void set_vm_flush_reset_perms(void *addr)
{
}
#endif
-/* for /dev/kmem */
+/* for /proc/kcore */
extern long vread(char *buf, char *addr, unsigned long count);
extern long vwrite(char *buf, char *addr, unsigned long count);
int register_vmap_purge_notifier(struct notifier_block *nb);
int unregister_vmap_purge_notifier(struct notifier_block *nb);
-#ifdef CONFIG_MMU
+#if defined(CONFIG_MMU) && defined(CONFIG_PRINTK)
bool vmalloc_dump_obj(void *object);
#else
static inline bool vmalloc_dump_obj(void *object) { return false; }