From 2971317ab04a38e34be5f4d62a65000b63857686 Mon Sep 17 00:00:00 2001 From: Guoyun Sun Date: Wed, 29 Apr 2020 16:44:32 +0800 Subject: mips/mm: Add page soft dirty tracking User space checkpoint and restart tool (CRIU) needs the page's change to be soft tracked. This allows to do a pre checkpoint and then dump only touched pages. Signed-off-by: Guoyun Sun Signed-off-by: Thomas Bogendoerfer --- arch/mips/include/asm/pgtable.h | 48 +++++++++++++++++++++++++++++++++++++++-- 1 file changed, 46 insertions(+), 2 deletions(-) (limited to 'arch/mips/include/asm/pgtable.h') diff --git a/arch/mips/include/asm/pgtable.h b/arch/mips/include/asm/pgtable.h index aab0ec174f68..9b01d2d78753 100644 --- a/arch/mips/include/asm/pgtable.h +++ b/arch/mips/include/asm/pgtable.h @@ -400,7 +400,7 @@ static inline pte_t pte_mkwrite(pte_t pte) static inline pte_t pte_mkdirty(pte_t pte) { - pte_val(pte) |= _PAGE_MODIFIED; + pte_val(pte) |= _PAGE_MODIFIED | _PAGE_SOFT_DIRTY; if (pte_val(pte) & _PAGE_WRITE) pte_val(pte) |= _PAGE_SILENT_WRITE; return pte; @@ -423,6 +423,30 @@ static inline pte_t pte_mkhuge(pte_t pte) return pte; } #endif /* CONFIG_MIPS_HUGE_TLB_SUPPORT */ + +#ifdef CONFIG_HAVE_ARCH_SOFT_DIRTY +static inline bool pte_soft_dirty(pte_t pte) +{ + return pte_val(pte) & _PAGE_SOFT_DIRTY; +} +#define pte_swp_soft_dirty pte_soft_dirty + +static inline pte_t pte_mksoft_dirty(pte_t pte) +{ + pte_val(pte) |= _PAGE_SOFT_DIRTY; + return pte; +} +#define pte_swp_mksoft_dirty pte_mksoft_dirty + +static inline pte_t pte_clear_soft_dirty(pte_t pte) +{ + pte_val(pte) &= ~(_PAGE_SOFT_DIRTY); + return pte; +} +#define pte_swp_clear_soft_dirty pte_clear_soft_dirty + +#endif /* CONFIG_HAVE_ARCH_SOFT_DIRTY */ + #endif /* @@ -576,7 +600,7 @@ static inline pmd_t pmd_mkclean(pmd_t pmd) static inline pmd_t pmd_mkdirty(pmd_t pmd) { - pmd_val(pmd) |= _PAGE_MODIFIED; + pmd_val(pmd) |= _PAGE_MODIFIED | _PAGE_SOFT_DIRTY; if (pmd_val(pmd) & _PAGE_WRITE) pmd_val(pmd) |= _PAGE_SILENT_WRITE; @@ -605,6 +629,26 @@ static inline pmd_t pmd_mkyoung(pmd_t pmd) return pmd; } +#ifdef CONFIG_HAVE_ARCH_SOFT_DIRTY +static inline int pmd_soft_dirty(pmd_t pmd) +{ + return !!(pmd_val(pmd) & _PAGE_SOFT_DIRTY); +} + +static inline pmd_t pmd_mksoft_dirty(pmd_t pmd) +{ + pmd_val(pmd) |= _PAGE_SOFT_DIRTY; + return pmd; +} + +static inline pmd_t pmd_clear_soft_dirty(pmd_t pmd) +{ + pmd_val(pmd) &= ~(_PAGE_SOFT_DIRTY); + return pmd; +} + +#endif /* CONFIG_HAVE_ARCH_SOFT_DIRTY */ + /* Extern to avoid header file madness */ extern pmd_t mk_pmd(struct page *page, pgprot_t prot); -- cgit v1.2.3-59-g8ed1b