Commit 5923165a authored Oct 14, 2024 by Mao Minkai Committed by guzitao Dec 12, 2024

sw64: fix mmap protection_map

Sunway inclusion
category: bugfix
bugzilla: https://gitee.com/openeuler/kernel/issues/IB73UR



--------------------------------

Set FOW bit for shared writable page so the software could set dirty-bit
in exception handling.

Signed-off-by: Mao Minkai <maominkai@wxiat.com>
Reviewed-by: He Sheng <hesheng@wxiat.com>
Signed-off-by: Gu Zitao <guzitao@wxiat.com>

parent 98b846b0

arch/sw_64/include/asm/pgtable.h

+1 −1

Original line number	Diff line number	Diff line
		@@ -207,7 +207,7 @@ static inline void set_p4d(p4d_t *p4dp, p4d_t p4d)
		#define _PAGE_CHG_MASK (_PFN_MASK \| __DIRTY_BITS \| __ACCESS_BITS \| _PAGE_SPECIAL \| _PAGE_LEAF \| _PAGE_CONT)

		#define _PAGE_P(x) _PAGE_NORMAL((x) \| _PAGE_FOW)
		#define _PAGE_S(x) _PAGE_NORMAL(x)
		#define _PAGE_S(x) _PAGE_NORMAL((x) \| _PAGE_FOW)

		/*
		* pgprot_noncached() is only for infiniband pci support, and a real