1caab277bSThomas Gleixner // SPDX-License-Identifier: GPL-2.0-only 21d18c47cSCatalin Marinas /* 31d18c47cSCatalin Marinas * Based on arch/arm/mm/copypage.c 41d18c47cSCatalin Marinas * 51d18c47cSCatalin Marinas * Copyright (C) 2002 Deep Blue Solutions Ltd, All Rights Reserved. 61d18c47cSCatalin Marinas * Copyright (C) 2012 ARM Ltd. 71d18c47cSCatalin Marinas */ 81d18c47cSCatalin Marinas 92563776bSVincenzo Frascino #include <linux/bitops.h> 101d18c47cSCatalin Marinas #include <linux/mm.h> 111d18c47cSCatalin Marinas 121d18c47cSCatalin Marinas #include <asm/page.h> 131d18c47cSCatalin Marinas #include <asm/cacheflush.h> 142563776bSVincenzo Frascino #include <asm/cpufeature.h> 152563776bSVincenzo Frascino #include <asm/mte.h> 161d18c47cSCatalin Marinas 172563776bSVincenzo Frascino void copy_highpage(struct page *to, struct page *from) 181d18c47cSCatalin Marinas { 192563776bSVincenzo Frascino struct page *kto = page_address(to); 202563776bSVincenzo Frascino struct page *kfrom = page_address(from); 212563776bSVincenzo Frascino 221d18c47cSCatalin Marinas copy_page(kto, kfrom); 232563776bSVincenzo Frascino 242563776bSVincenzo Frascino if (system_supports_mte() && test_bit(PG_mte_tagged, &from->flags)) { 252563776bSVincenzo Frascino set_bit(PG_mte_tagged, &to->flags); 262563776bSVincenzo Frascino mte_copy_page_tags(kto, kfrom); 271d18c47cSCatalin Marinas } 282563776bSVincenzo Frascino } 292563776bSVincenzo Frascino EXPORT_SYMBOL(copy_highpage); 302563776bSVincenzo Frascino 312563776bSVincenzo Frascino void copy_user_highpage(struct page *to, struct page *from, 322563776bSVincenzo Frascino unsigned long vaddr, struct vm_area_struct *vma) 332563776bSVincenzo Frascino { 342563776bSVincenzo Frascino copy_highpage(to, from); 352563776bSVincenzo Frascino flush_dcache_page(to); 362563776bSVincenzo Frascino } 372563776bSVincenzo Frascino EXPORT_SYMBOL_GPL(copy_user_highpage); 381d18c47cSCatalin Marinas 391d18c47cSCatalin Marinas void __cpu_clear_user_page(void *kaddr, unsigned long vaddr) 401d18c47cSCatalin Marinas { 411d18c47cSCatalin Marinas clear_page(kaddr); 421d18c47cSCatalin Marinas } 43bec7cedcSMark Salter EXPORT_SYMBOL_GPL(__cpu_clear_user_page); 44