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33 lines
650 B
33 lines
650 B
/* SPDX-License-Identifier: GPL-2.0 */ |
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/* |
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* powerpc KFENCE support. |
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* |
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* Copyright (C) 2020 CS GROUP France |
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*/ |
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#ifndef __ASM_POWERPC_KFENCE_H |
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#define __ASM_POWERPC_KFENCE_H |
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#include <linux/mm.h> |
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#include <asm/pgtable.h> |
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static inline bool arch_kfence_init_pool(void) |
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{ |
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return true; |
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} |
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static inline bool kfence_protect_page(unsigned long addr, bool protect) |
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{ |
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pte_t *kpte = virt_to_kpte(addr); |
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if (protect) { |
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pte_update(&init_mm, addr, kpte, _PAGE_PRESENT, 0, 0); |
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flush_tlb_kernel_range(addr, addr + PAGE_SIZE); |
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} else { |
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pte_update(&init_mm, addr, kpte, 0, _PAGE_PRESENT, 0); |
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} |
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return true; |
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} |
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#endif /* __ASM_POWERPC_KFENCE_H */
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