31 lines
611 B
C
31 lines
611 B
C
|
/* SPDX-License-Identifier: GPL-2.0 */
|
||
|
|
|
||
|
|
#ifndef _ASM_RISCV_KFENCE_H
|
||
|
|
#define _ASM_RISCV_KFENCE_H
|
||
|
|
|
||
|
|
#include <linux/kfence.h>
|
||
|
|
#include <linux/pfn.h>
|
||
|
|
#include <asm-generic/pgalloc.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 *pte = virt_to_kpte(addr);
|
||
|
|
|
||
|
|
if (protect)
|
||
|
|
set_pte(pte, __pte(pte_val(*pte) & ~_PAGE_PRESENT));
|
||
|
|
else
|
||
|
|
set_pte(pte, __pte(pte_val(*pte) | _PAGE_PRESENT));
|
||
|
|
|
||
|
|
flush_tlb_kernel_range(addr, addr + PAGE_SIZE);
|
||
|
|
|
||
|
|
return true;
|
||
|
|
}
|
||
|
|
|
||
|
|
#endif /* _ASM_RISCV_KFENCE_H */
|