Merge tag 'gvt-next-fixes-2020-12-25' of https://github.com/intel/gvt-linux into...
[linux-2.6-microblaze.git] / arch / arm64 / mm / copypage.c
1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3  * Based on arch/arm/mm/copypage.c
4  *
5  * Copyright (C) 2002 Deep Blue Solutions Ltd, All Rights Reserved.
6  * Copyright (C) 2012 ARM Ltd.
7  */
8
9 #include <linux/bitops.h>
10 #include <linux/mm.h>
11
12 #include <asm/page.h>
13 #include <asm/cacheflush.h>
14 #include <asm/cpufeature.h>
15 #include <asm/mte.h>
16
17 void copy_highpage(struct page *to, struct page *from)
18 {
19         struct page *kto = page_address(to);
20         struct page *kfrom = page_address(from);
21
22         copy_page(kto, kfrom);
23
24         if (system_supports_mte() && test_bit(PG_mte_tagged, &from->flags)) {
25                 set_bit(PG_mte_tagged, &to->flags);
26                 mte_copy_page_tags(kto, kfrom);
27         }
28 }
29 EXPORT_SYMBOL(copy_highpage);
30
31 void copy_user_highpage(struct page *to, struct page *from,
32                         unsigned long vaddr, struct vm_area_struct *vma)
33 {
34         copy_highpage(to, from);
35         flush_dcache_page(to);
36 }
37 EXPORT_SYMBOL_GPL(copy_user_highpage);