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Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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1.7 kB · 83 lines
C
at master
123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384#ifndef _ASM_GENERIC_PGTABLE_UFFD_H#define _ASM_GENERIC_PGTABLE_UFFD_H
/* * Some platforms can customize the uffd-wp bit, making it unavailable * even if the architecture provides the resource. * Adding this API allows architectures to add their own checks for the * devices on which the kernel is running. * Note: When overriding it, please make sure the * CONFIG_HAVE_ARCH_USERFAULTFD_WP is part of this macro. */#ifndef pgtable_supports_uffd_wp#define pgtable_supports_uffd_wp() IS_ENABLED(CONFIG_HAVE_ARCH_USERFAULTFD_WP)#endif
static inline bool uffd_supports_wp_marker(void){ return pgtable_supports_uffd_wp() && IS_ENABLED(CONFIG_PTE_MARKER_UFFD_WP);}
#ifndef CONFIG_HAVE_ARCH_USERFAULTFD_WPstatic __always_inline int pte_uffd_wp(pte_t pte){ return 0;}
static __always_inline int pmd_uffd_wp(pmd_t pmd){ return 0;}
static __always_inline pte_t pte_mkuffd_wp(pte_t pte){ return pte;}
static __always_inline pmd_t pmd_mkuffd_wp(pmd_t pmd){ return pmd;}
static __always_inline pte_t pte_clear_uffd_wp(pte_t pte){ return pte;}
static __always_inline pmd_t pmd_clear_uffd_wp(pmd_t pmd){ return pmd;}
static __always_inline pte_t pte_swp_mkuffd_wp(pte_t pte){ return pte;}
static __always_inline int pte_swp_uffd_wp(pte_t pte){ return 0;}
static __always_inline pte_t pte_swp_clear_uffd_wp(pte_t pte){ return pte;}
static inline pmd_t pmd_swp_mkuffd_wp(pmd_t pmd){ return pmd;}
static inline int pmd_swp_uffd_wp(pmd_t pmd){ return 0;}
static inline pmd_t pmd_swp_clear_uffd_wp(pmd_t pmd){ return pmd;}#endif /* CONFIG_HAVE_ARCH_USERFAULTFD_WP */
#endif /* _ASM_GENERIC_PGTABLE_UFFD_H */