| // SPDX-License-Identifier: GPL-2.0 |
| * Copyright (c) 2019 Sven Schnelle <svens@stackframe.org> |
| #include <linux/kprobes.h> |
| #include <asm/cacheflush.h> |
| void notrace set_fixmap(enum fixed_addresses idx, phys_addr_t phys) |
| unsigned long vaddr = __fix_to_virt(idx); |
| pgd_t *pgd = pgd_offset_k(vaddr); |
| p4d_t *p4d = p4d_offset(pgd, vaddr); |
| pud_t *pud = pud_offset(p4d, vaddr); |
| pmd_t *pmd = pmd_offset(pud, vaddr); |
| pte = pte_offset_kernel(pmd, vaddr); |
| set_pte_at(&init_mm, vaddr, pte, __mk_pte(phys, PAGE_KERNEL_RWX)); |
| flush_tlb_kernel_range(vaddr, vaddr + PAGE_SIZE); |
| void notrace clear_fixmap(enum fixed_addresses idx) |
| unsigned long vaddr = __fix_to_virt(idx); |
| pte_t *pte = virt_to_kpte(vaddr); |
| if (WARN_ON(pte_none(*pte))) |
| pte_clear(&init_mm, vaddr, pte); |
| flush_tlb_kernel_range(vaddr, vaddr + PAGE_SIZE); |