Greg Kroah-Hartman
598cf27219
Link: https://lore.kernel.org/r/20260217200002.683975158@linuxfoundation.org Tested-by: Florian Fainelli <florian.fainelli@broadcom.com> Tested-by: Takeshi Ogasawara <takeshi.ogasawara@futuring-girl.com> Tested-by: Peter Schneider <pschneider1968@googlemail.com> Tested-by: Jon Hunter <jonathanh@nvidia.com> Tested-by: Salvatore Bonaccorso <carnil@debian.org> Tested-by: Brett A C Sheffield <bacs@librecast.net> Tested-by: Mark Brown <broonie@kernel.org> Tested-by: Luna Jernberg <droidbittin@gmail.com> Tested-by: Ronald Warsow <rwarsow@gmx.de> Tested-by: Justin M. Forbes <jforbes@fedoraproject.org> Tested-by: Ron Economos <re@w6rz.net> Tested-by: Miguel Ojeda <ojeda@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
84 lines
1.6 KiB
C
84 lines
1.6 KiB
C
#ifndef _ASM_GENERIC_PGTABLE_UFFD_H
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#define _ASM_GENERIC_PGTABLE_UFFD_H
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/*
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* Some platforms can customize the uffd-wp bit, making it unavailable
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* even if the architecture provides the resource.
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* Adding this API allows architectures to add their own checks for the
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* devices on which the kernel is running.
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* Note: When overriding it, please make sure the
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* CONFIG_HAVE_ARCH_USERFAULTFD_WP is part of this macro.
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*/
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#ifndef pgtable_supports_uffd_wp
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#define pgtable_supports_uffd_wp() IS_ENABLED(CONFIG_HAVE_ARCH_USERFAULTFD_WP)
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#endif
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static inline bool uffd_supports_wp_marker(void)
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{
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return pgtable_supports_uffd_wp() && IS_ENABLED(CONFIG_PTE_MARKER_UFFD_WP);
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}
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#ifndef CONFIG_HAVE_ARCH_USERFAULTFD_WP
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static __always_inline int pte_uffd_wp(pte_t pte)
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{
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return 0;
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}
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static __always_inline int pmd_uffd_wp(pmd_t pmd)
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{
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return 0;
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}
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static __always_inline pte_t pte_mkuffd_wp(pte_t pte)
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{
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return pte;
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}
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static __always_inline pmd_t pmd_mkuffd_wp(pmd_t pmd)
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{
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return pmd;
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}
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static __always_inline pte_t pte_clear_uffd_wp(pte_t pte)
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{
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return pte;
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}
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static __always_inline pmd_t pmd_clear_uffd_wp(pmd_t pmd)
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{
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return pmd;
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}
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static __always_inline pte_t pte_swp_mkuffd_wp(pte_t pte)
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{
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return pte;
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}
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static __always_inline int pte_swp_uffd_wp(pte_t pte)
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{
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return 0;
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}
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static __always_inline pte_t pte_swp_clear_uffd_wp(pte_t pte)
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{
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return pte;
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}
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static inline pmd_t pmd_swp_mkuffd_wp(pmd_t pmd)
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{
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return pmd;
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}
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static inline int pmd_swp_uffd_wp(pmd_t pmd)
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{
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return 0;
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}
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static inline pmd_t pmd_swp_clear_uffd_wp(pmd_t pmd)
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{
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return pmd;
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}
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#endif /* CONFIG_HAVE_ARCH_USERFAULTFD_WP */
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#endif /* _ASM_GENERIC_PGTABLE_UFFD_H */
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