1/* SPDX-License-Identifier: GPL-2.0 */
2#ifndef _LINUX_IOREMAP_H
3#define _LINUX_IOREMAP_H
4
5#include <linux/kasan.h>
6#include <asm/pgtable.h>
7#include <asm/vmalloc.h>
8
9#if defined(CONFIG_HAS_IOMEM) || defined(CONFIG_GENERIC_IOREMAP)
10/*
11 * Ioremap often, but not always uses the generic vmalloc area. E.g on
12 * Power ARCH, it could have different ioremap space.
13 */
14#ifndef IOREMAP_START
15#define IOREMAP_START VMALLOC_START
16#define IOREMAP_END VMALLOC_END
17#endif
18static inline bool is_ioremap_addr(const void *x)
19{
20 unsigned long addr = (unsigned long)kasan_reset_tag(addr: x);
21
22 return addr >= IOREMAP_START && addr < IOREMAP_END;
23}
24#else
25static inline bool is_ioremap_addr(const void *x)
26{
27 return false;
28}
29#endif
30
31#endif /* _LINUX_IOREMAP_H */
32