1 files changed, 0 insertions, 199 deletions
diff --git a/mm/kasan/kasan_init.c b/mm/kasan/kasan_init.c
deleted file mode 100644
index 554e4c0f23a2..000000000000
--- a/mm/kasan/kasan_init.c
+++ /dev/null
@@ -1,199 +0,0 @@
-/*
- * This file contains some kasan initialization code.
- *
- * Copyright (c) 2015 Samsung Electronics Co., Ltd.
- * Author: Andrey Ryabinin <ryabinin.a.a@gmail.com>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- *
- */
-
-#include <linux/bootmem.h>
-#include <linux/init.h>
-#include <linux/kasan.h>
-#include <linux/kernel.h>
-#include <linux/memblock.h>
-#include <linux/mm.h>
-#include <linux/pfn.h>
-
-#include <asm/page.h>
-#include <asm/pgalloc.h>
-
-/*
- * This page serves two purposes:
- *   - It used as early shadow memory. The entire shadow region populated
- *     with this page, before we will be able to setup normal shadow memory.
- *   - Latter it reused it as zero shadow to cover large ranges of memory
- *     that allowed to access, but not handled by kasan (vmalloc/vmemmap ...).
- */
-unsigned char kasan_zero_page[PAGE_SIZE] __page_aligned_bss;
-
-#if CONFIG_PGTABLE_LEVELS > 4
-p4d_t kasan_zero_p4d[PTRS_PER_P4D] __page_aligned_bss;
-#endif
-#if CONFIG_PGTABLE_LEVELS > 3
-pud_t kasan_zero_pud[PTRS_PER_PUD] __page_aligned_bss;
-#endif
-#if CONFIG_PGTABLE_LEVELS > 2
-pmd_t kasan_zero_pmd[PTRS_PER_PMD] __page_aligned_bss;
-#endif
-pte_t kasan_zero_pte[PTRS_PER_PTE] __page_aligned_bss;
-
-static __init void *early_alloc(size_t size, int node)
-{
-	return memblock_virt_alloc_try_nid(size, size, __pa(MAX_DMA_ADDRESS),
-					BOOTMEM_ALLOC_ACCESSIBLE, node);
-}
-
-static void __init zero_pte_populate(pmd_t *pmd, unsigned long addr,
-				unsigned long end)
-{
-	pte_t *pte = pte_offset_kernel(pmd, addr);
-	pte_t zero_pte;
-
-	zero_pte = pfn_pte(PFN_DOWN(__pa_symbol(kasan_zero_page)), PAGE_KERNEL);
-	zero_pte = pte_wrprotect(zero_pte);
-
-	while (addr + PAGE_SIZE <= end) {
-		set_pte_at(&init_mm, addr, pte, zero_pte);
-		addr += PAGE_SIZE;
-		pte = pte_offset_kernel(pmd, addr);
-	}
-}
-
-static void __init zero_pmd_populate(pud_t *pud, unsigned long addr,
-				unsigned long end)
-{
-	pmd_t *pmd = pmd_offset(pud, addr);
-	unsigned long next;
-
-	do {
-		next = pmd_addr_end(addr, end);
-
-		if (IS_ALIGNED(addr, PMD_SIZE) && end - addr >= PMD_SIZE) {
-			pmd_populate_kernel(&init_mm, pmd, lm_alias(kasan_zero_pte));
-			continue;
-		}
-
-		if (pmd_none(*pmd)) {
-			pmd_populate_kernel(&init_mm, pmd,
-					early_alloc(PAGE_SIZE, NUMA_NO_NODE));
-		}
-		zero_pte_populate(pmd, addr, next);
-	} while (pmd++, addr = next, addr != end);
-}
-
-static void __init zero_pud_populate(p4d_t *p4d, unsigned long addr,
-				unsigned long end)
-{
-	pud_t *pud = pud_offset(p4d, addr);
-	unsigned long next;
-
-	do {
-		next = pud_addr_end(addr, end);
-		if (IS_ALIGNED(addr, PUD_SIZE) && end - addr >= PUD_SIZE) {
-			pmd_t *pmd;
-
-			pud_populate(&init_mm, pud, lm_alias(kasan_zero_pmd));
-			pmd = pmd_offset(pud, addr);
-			pmd_populate_kernel(&init_mm, pmd, lm_alias(kasan_zero_pte));
-			continue;
-		}
-
-		if (pud_none(*pud)) {
-			pud_populate(&init_mm, pud,
-				early_alloc(PAGE_SIZE, NUMA_NO_NODE));
-		}
-		zero_pmd_populate(pud, addr, next);
-	} while (pud++, addr = next, addr != end);
-}
-
-static void __init zero_p4d_populate(pgd_t *pgd, unsigned long addr,
-				unsigned long end)
-{
-	p4d_t *p4d = p4d_offset(pgd, addr);
-	unsigned long next;
-
-	do {
-		next = p4d_addr_end(addr, end);
-		if (IS_ALIGNED(addr, P4D_SIZE) && end - addr >= P4D_SIZE) {
-			pud_t *pud;
-			pmd_t *pmd;
-
-			p4d_populate(&init_mm, p4d, lm_alias(kasan_zero_pud));
-			pud = pud_offset(p4d, addr);
-			pud_populate(&init_mm, pud, lm_alias(kasan_zero_pmd));
-			pmd = pmd_offset(pud, addr);
-			pmd_populate_kernel(&init_mm, pmd,
-						lm_alias(kasan_zero_pte));
-			continue;
-		}
-
-		if (p4d_none(*p4d)) {
-			p4d_populate(&init_mm, p4d,
-				early_alloc(PAGE_SIZE, NUMA_NO_NODE));
-		}
-		zero_pud_populate(p4d, addr, next);
-	} while (p4d++, addr = next, addr != end);
-}
-
-/**
- * kasan_populate_zero_shadow - populate shadow memory region with
- *                               kasan_zero_page
- * @shadow_start - start of the memory range to populate
- * @shadow_end   - end of the memory range to populate
- */
-void __init kasan_populate_zero_shadow(const void *shadow_start,
-				const void *shadow_end)
-{
-	unsigned long addr = (unsigned long)shadow_start;
-	unsigned long end = (unsigned long)shadow_end;
-	pgd_t *pgd = pgd_offset_k(addr);
-	unsigned long next;
-
-	do {
-		next = pgd_addr_end(addr, end);
-
-		if (IS_ALIGNED(addr, PGDIR_SIZE) && end - addr >= PGDIR_SIZE) {
-			p4d_t *p4d;
-			pud_t *pud;
-			pmd_t *pmd;
-
-			/*
-			 * kasan_zero_pud should be populated with pmds
-			 * at this moment.
-			 * [pud,pmd]_populate*() below needed only for
-			 * 3,2 - level page tables where we don't have
-			 * puds,pmds, so pgd_populate(), pud_populate()
-			 * is noops.
-			 *
-			 * The ifndef is required to avoid build breakage.
-			 *
-			 * With 5level-fixup.h, pgd_populate() is not nop and
-			 * we reference kasan_zero_p4d. It's not defined
-			 * unless 5-level paging enabled.
-			 *
-			 * The ifndef can be dropped once all KASAN-enabled
-			 * architectures will switch to pgtable-nop4d.h.
-			 */
-#ifndef __ARCH_HAS_5LEVEL_HACK
-			pgd_populate(&init_mm, pgd, lm_alias(kasan_zero_p4d));
-#endif
-			p4d = p4d_offset(pgd, addr);
-			p4d_populate(&init_mm, p4d, lm_alias(kasan_zero_pud));
-			pud = pud_offset(p4d, addr);
-			pud_populate(&init_mm, pud, lm_alias(kasan_zero_pmd));
-			pmd = pmd_offset(pud, addr);
-			pmd_populate_kernel(&init_mm, pmd, lm_alias(kasan_zero_pte));
-			continue;
-		}
-
-		if (pgd_none(*pgd)) {
-			pgd_populate(&init_mm, pgd,
-				early_alloc(PAGE_SIZE, NUMA_NO_NODE));
-		}
-		zero_p4d_populate(pgd, addr, next);
-	} while (pgd++, addr = next, addr != end);
-}