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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 | |
| 11 | void __kernel_map_pages(struct page *page, int numpages, int enable); |
| 12 | |
| 13 | static __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 | |
| 25 | static 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 */ |
| 32 |
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