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                                                                                                                                                                                     /* SPDX-License-Identifier: GPL-2.0 */
/*
 * powerpc KFENCE support.
 *
 * Copyright (C) 2020 CS GROUP France
 */

#ifndef __ASM_POWERPC_KFENCE_H
#define __ASM_POWERPC_KFENCE_H

#include <linux/mm.h>
#include <asm/pgtable.h>

static inline bool arch_kfence_init_pool(void)
{
	return true;
}

static inline bool kfence_protect_page(unsigned long addr, bool protect)
{
	pte_t *kpte = virt_to_kpte(addr);

	if (protect) {
		pte_update(&init_mm, addr, kpte, _PAGE_PRESENT, 0, 0);
		flush_tlb_kernel_range(addr, addr + PAGE_SIZE);
	} else {
		pte_update(&init_mm, addr, kpte, 0, _PAGE_PRESENT, 0);
	}

	return true;
}

#endif /* __ASM_POWERPC_KFENCE_H */