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#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_WP
static __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 */
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