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1/* SPDX-License-Identifier: GPL-2.0 */
2
3#ifndef _ASM_S390_KFENCE_H
4#define _ASM_S390_KFENCE_H
5
6#include <linux/mm.h>
7#include <linux/kfence.h>
8#include <asm/set_memory.h>
9#include <asm/page.h>
10
11void __kernel_map_pages(struct page *page, int numpages, int enable);
12
13static __always_inline bool arch_kfence_init_pool(void)
14{
15#ifdef CONFIG_KFENCE
16 unsigned long pool_pages = KFENCE_POOL_SIZE >> PAGE_SHIFT;
17
18 set_memory_4k((unsigned long)__kfence_pool, pool_pages);
19#endif
20 return true;
21}
22
23#define arch_kfence_test_address(addr) ((addr) & PAGE_MASK)
24
25static inline bool kfence_protect_page(unsigned long addr, bool protect)
26{
27 __kernel_map_pages(virt_to_page((void *)addr), 1, !protect);
28 return true;
29}
30
31#endif /* _ASM_S390_KFENCE_H */