From ace9429bb58fd418f0c81d4c2835699bddf6bde6 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Thu, 11 Apr 2024 10:27:49 +0200 Subject: Adding upstream version 6.6.15. Signed-off-by: Daniel Baumann --- arch/arm64/mm/copypage.c | 42 ++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 42 insertions(+) create mode 100644 arch/arm64/mm/copypage.c (limited to 'arch/arm64/mm/copypage.c') diff --git a/arch/arm64/mm/copypage.c b/arch/arm64/mm/copypage.c new file mode 100644 index 0000000000..a7bb20055c --- /dev/null +++ b/arch/arm64/mm/copypage.c @@ -0,0 +1,42 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Based on arch/arm/mm/copypage.c + * + * Copyright (C) 2002 Deep Blue Solutions Ltd, All Rights Reserved. + * Copyright (C) 2012 ARM Ltd. + */ + +#include +#include + +#include +#include +#include +#include + +void copy_highpage(struct page *to, struct page *from) +{ + void *kto = page_address(to); + void *kfrom = page_address(from); + + copy_page(kto, kfrom); + + if (kasan_hw_tags_enabled()) + page_kasan_tag_reset(to); + + if (system_supports_mte() && page_mte_tagged(from)) { + /* It's a new page, shouldn't have been tagged yet */ + WARN_ON_ONCE(!try_page_mte_tagging(to)); + mte_copy_page_tags(kto, kfrom); + set_page_mte_tagged(to); + } +} +EXPORT_SYMBOL(copy_highpage); + +void copy_user_highpage(struct page *to, struct page *from, + unsigned long vaddr, struct vm_area_struct *vma) +{ + copy_highpage(to, from); + flush_dcache_page(to); +} +EXPORT_SYMBOL_GPL(copy_user_highpage); -- cgit v1.2.3