1 files changed, 0 insertions, 221 deletions
diff --git a/arch/powerpc/mm/kasan/kasan_init_32.c b/arch/powerpc/mm/kasan/kasan_init_32.c
deleted file mode 100644
index 0e6ed4413eea..000000000000
--- a/arch/powerpc/mm/kasan/kasan_init_32.c
+++ /dev/null
@@ -1,221 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-
-#define DISABLE_BRANCH_PROFILING
-
-#include <linux/kasan.h>
-#include <linux/printk.h>
-#include <linux/memblock.h>
-#include <linux/moduleloader.h>
-#include <linux/sched/task.h>
-#include <linux/vmalloc.h>
-#include <asm/pgalloc.h>
-#include <asm/code-patching.h>
-#include <mm/mmu_decl.h>
-
-static pgprot_t kasan_prot_ro(void)
-{
-	if (early_mmu_has_feature(MMU_FTR_HPTE_TABLE))
-		return PAGE_READONLY;
-
-	return PAGE_KERNEL_RO;
-}
-
-static void kasan_populate_pte(pte_t *ptep, pgprot_t prot)
-{
-	unsigned long va = (unsigned long)kasan_early_shadow_page;
-	phys_addr_t pa = __pa(kasan_early_shadow_page);
-	int i;
-
-	for (i = 0; i < PTRS_PER_PTE; i++, ptep++)
-		__set_pte_at(&init_mm, va, ptep, pfn_pte(PHYS_PFN(pa), prot), 0);
-}
-
-static int __ref kasan_init_shadow_page_tables(unsigned long k_start, unsigned long k_end)
-{
-	pmd_t *pmd;
-	unsigned long k_cur, k_next;
-	pgprot_t prot = slab_is_available() ? kasan_prot_ro() : PAGE_KERNEL;
-
-	pmd = pmd_offset(pud_offset(pgd_offset_k(k_start), k_start), k_start);
-
-	for (k_cur = k_start; k_cur != k_end; k_cur = k_next, pmd++) {
-		pte_t *new;
-
-		k_next = pgd_addr_end(k_cur, k_end);
-		if ((void *)pmd_page_vaddr(*pmd) != kasan_early_shadow_pte)
-			continue;
-
-		if (slab_is_available())
-			new = pte_alloc_one_kernel(&init_mm);
-		else
-			new = memblock_alloc(PTE_FRAG_SIZE, PTE_FRAG_SIZE);
-
-		if (!new)
-			return -ENOMEM;
-		kasan_populate_pte(new, prot);
-
-		smp_wmb(); /* See comment in __pte_alloc */
-
-		spin_lock(&init_mm.page_table_lock);
-			/* Has another populated it ? */
-		if (likely((void *)pmd_page_vaddr(*pmd) == kasan_early_shadow_pte)) {
-			pmd_populate_kernel(&init_mm, pmd, new);
-			new = NULL;
-		}
-		spin_unlock(&init_mm.page_table_lock);
-
-		if (new && slab_is_available())
-			pte_free_kernel(&init_mm, new);
-	}
-	return 0;
-}
-
-static void __ref *kasan_get_one_page(void)
-{
-	if (slab_is_available())
-		return (void *)__get_free_page(GFP_KERNEL | __GFP_ZERO);
-
-	return memblock_alloc(PAGE_SIZE, PAGE_SIZE);
-}
-
-static int __ref kasan_init_region(void *start, size_t size)
-{
-	unsigned long k_start = (unsigned long)kasan_mem_to_shadow(start);
-	unsigned long k_end = (unsigned long)kasan_mem_to_shadow(start + size);
-	unsigned long k_cur;
-	int ret;
-	void *block = NULL;
-
-	ret = kasan_init_shadow_page_tables(k_start, k_end);
-	if (ret)
-		return ret;
-
-	if (!slab_is_available())
-		block = memblock_alloc(k_end - k_start, PAGE_SIZE);
-
-	for (k_cur = k_start & PAGE_MASK; k_cur < k_end; k_cur += PAGE_SIZE) {
-		pmd_t *pmd = pmd_offset(pud_offset(pgd_offset_k(k_cur), k_cur), k_cur);
-		void *va = block ? block + k_cur - k_start : kasan_get_one_page();
-		pte_t pte = pfn_pte(PHYS_PFN(__pa(va)), PAGE_KERNEL);
-
-		if (!va)
-			return -ENOMEM;
-
-		__set_pte_at(&init_mm, k_cur, pte_offset_kernel(pmd, k_cur), pte, 0);
-	}
-	flush_tlb_kernel_range(k_start, k_end);
-	return 0;
-}
-
-static void __init kasan_remap_early_shadow_ro(void)
-{
-	pgprot_t prot = kasan_prot_ro();
-	unsigned long k_start = KASAN_SHADOW_START;
-	unsigned long k_end = KASAN_SHADOW_END;
-	unsigned long k_cur;
-	phys_addr_t pa = __pa(kasan_early_shadow_page);
-
-	kasan_populate_pte(kasan_early_shadow_pte, prot);
-
-	for (k_cur = k_start & PAGE_MASK; k_cur < k_end; k_cur += PAGE_SIZE) {
-		pmd_t *pmd = pmd_offset(pud_offset(pgd_offset_k(k_cur), k_cur), k_cur);
-		pte_t *ptep = pte_offset_kernel(pmd, k_cur);
-
-		if ((pte_val(*ptep) & PTE_RPN_MASK) != pa)
-			continue;
-
-		__set_pte_at(&init_mm, k_cur, ptep, pfn_pte(PHYS_PFN(pa), prot), 0);
-	}
-	flush_tlb_kernel_range(KASAN_SHADOW_START, KASAN_SHADOW_END);
-}
-
-void __init kasan_mmu_init(void)
-{
-	int ret;
-	struct memblock_region *reg;
-
-	if (early_mmu_has_feature(MMU_FTR_HPTE_TABLE)) {
-		ret = kasan_init_shadow_page_tables(KASAN_SHADOW_START, KASAN_SHADOW_END);
-
-		if (ret)
-			panic("kasan: kasan_init_shadow_page_tables() failed");
-	}
-
-	for_each_memblock(memory, reg) {
-		phys_addr_t base = reg->base;
-		phys_addr_t top = min(base + reg->size, total_lowmem);
-
-		if (base >= top)
-			continue;
-
-		ret = kasan_init_region(__va(base), top - base);
-		if (ret)
-			panic("kasan: kasan_init_region() failed");
-	}
-}
-
-void __init kasan_init(void)
-{
-	kasan_remap_early_shadow_ro();
-
-	clear_page(kasan_early_shadow_page);
-
-	/* At this point kasan is fully initialized. Enable error messages */
-	init_task.kasan_depth = 0;
-	pr_info("KASAN init done\n");
-}
-
-#ifdef CONFIG_MODULES
-void *module_alloc(unsigned long size)
-{
-	void *base;
-
-	base = __vmalloc_node_range(size, MODULE_ALIGN, VMALLOC_START, VMALLOC_END,
-				    GFP_KERNEL, PAGE_KERNEL_EXEC, VM_FLUSH_RESET_PERMS,
-				    NUMA_NO_NODE, __builtin_return_address(0));
-
-	if (!base)
-		return NULL;
-
-	if (!kasan_init_region(base, size))
-		return base;
-
-	vfree(base);
-
-	return NULL;
-}
-#endif
-
-#ifdef CONFIG_PPC_BOOK3S_32
-u8 __initdata early_hash[256 << 10] __aligned(256 << 10) = {0};
-
-static void __init kasan_early_hash_table(void)
-{
-	modify_instruction_site(&patch__hash_page_A0, 0xffff, __pa(early_hash) >> 16);
-	modify_instruction_site(&patch__flush_hash_A0, 0xffff, __pa(early_hash) >> 16);
-
-	Hash = (struct hash_pte *)early_hash;
-}
-#else
-static void __init kasan_early_hash_table(void) {}
-#endif
-
-void __init kasan_early_init(void)
-{
-	unsigned long addr = KASAN_SHADOW_START;
-	unsigned long end = KASAN_SHADOW_END;
-	unsigned long next;
-	pmd_t *pmd = pmd_offset(pud_offset(pgd_offset_k(addr), addr), addr);
-
-	BUILD_BUG_ON(KASAN_SHADOW_START & ~PGDIR_MASK);
-
-	kasan_populate_pte(kasan_early_shadow_pte, PAGE_KERNEL);
-
-	do {
-		next = pgd_addr_end(addr, end);
-		pmd_populate_kernel(&init_mm, pmd, kasan_early_shadow_pte);
-	} while (pmd++, addr = next, addr != end);
-
-	if (early_mmu_has_feature(MMU_FTR_HPTE_TABLE))
-		kasan_early_hash_table();
-}