kernel/linux.git/arch/mips/include/asm/pgtable.h, branch linux-7.0.y

mips: drop paging_init()

2026-01-27T04:02:19+00:00

All three variants of paging_init() on MIPS are wrappers for pagetable_init(). Instead of having three identical wrappers, call pagetable_init() directly from setup_arch() and remove the unnecessary paging_init() functions. Link: https://lkml.kernel.org/r/20260111082105.290734-26-rppt@kernel.org Signed-off-by: Mike Rapoport (Microsoft) Cc: Alexander Gordeev Cc: Alex Shi Cc: Andreas Larsson Cc: "Borislav Petkov (AMD)" Cc: Catalin Marinas Cc: David Hildenbrand Cc: David S. Miller Cc: Dinh Nguyen Cc: Geert Uytterhoeven Cc: Guo Ren Cc: Heiko Carstens Cc: Helge Deller Cc: Huacai Chen Cc: Ingo Molnar Cc: Johannes Berg Cc: John Paul Adrian Glaubitz Cc: Jonathan Corbet Cc: Klara Modin Cc: Liam Howlett Cc: Lorenzo Stoakes Cc: Magnus Lindholm Cc: Matt Turner Cc: Max Filippov Cc: Michael Ellerman Cc: Michal Hocko Cc: Michal Simek Cc: Muchun Song Cc: Oscar Salvador Cc: Palmer Dabbelt Cc: Pratyush Yadav Cc: Richard Weinberger Cc: "Ritesh Harjani (IBM)" Cc: Russell King Cc: Stafford Horne Cc: Suren Baghdasaryan Cc: Thomas Bogendoerfer Cc: Thomas Gleixner Cc: Vasily Gorbik Cc: Vineet Gupta Cc: Vlastimil Babka Cc: Will Deacon Signed-off-by: Andrew Morton

mm: abstract io_remap_pfn_range() based on PFN

2025-11-17T01:28:12+00:00

The only instances in which we customise this function are ones in which we customise the PFN used. Instances where architectures were not passing the pgprot value through pgprot_decrypted() are ones where pgprot_decrypted() was a no-op anyway, so we can simply always pass pgprot through this function. Use this fact to simplify the use of io_remap_pfn_range(), by abstracting the PFN via io_remap_pfn_range_pfn() and using this instead of providing a general io_remap_pfn_range() function per-architecture. Link: https://lkml.kernel.org/r/d086191bf431b58ce3b231b4f4f555d080f60327.1760959442.git.lorenzo.stoakes@oracle.com Suggested-by: Jason Gunthorpe Signed-off-by: Lorenzo Stoakes Reviewed-by: Jason Gunthorpe Cc: Alexander Gordeev Cc: Al Viro Cc: Andreas Larsson Cc: Andrey Konovalov Cc: Arnd Bergmann Cc: Baolin Wang Cc: Baoquan He Cc: Chatre, Reinette Cc: Christian Borntraeger Cc: Christian Brauner Cc: Dan Williams Cc: Dave Jiang Cc: Dave Martin Cc: Dave Young Cc: David Hildenbrand Cc: David S. Miller Cc: Dmitriy Vyukov Cc: Greg Kroah-Hartman Cc: Guo Ren Cc: Heiko Carstens Cc: Hugh Dickins Cc: James Morse Cc: Jan Kara Cc: Jann Horn Cc: Jonathan Corbet Cc: Kevin Tian Cc: Konstantin Komarov Cc: Liam Howlett Cc: "Luck, Tony" Cc: Matthew Wilcox (Oracle) Cc: Michal Hocko Cc: Mike Rapoport Cc: Muchun Song Cc: Nicolas Pitre Cc: Oscar Salvador Cc: Pedro Falcato Cc: Robin Murohy Cc: Sumanth Korikkar Cc: Suren Baghdasaryan Cc: Sven Schnelle Cc: Thomas Bogendoerfer Cc: "Uladzislau Rezki (Sony)" Cc: Vasily Gorbik Cc: Vishal Verma Cc: Vivek Goyal Cc: Vlastimil Babka Cc: Will Deacon Signed-off-by: Andrew Morton

mm: pgtable: fix pte_swp_exclusive

2025-06-11T21:52:08+00:00

Make pte_swp_exclusive return bool instead of int. This will better reflect how pte_swp_exclusive is actually used in the code. This fixes swap/swapoff problems on Alpha due pte_swp_exclusive not returning correct values when _PAGE_SWP_EXCLUSIVE bit resides in upper 32-bits of PTE (like on alpha). Suggested-by: Al Viro Signed-off-by: Magnus Lindholm Cc: Sam James Link: https://lore.kernel.org/lkml/20250218175735.19882-2-linmag7@gmail.com/ Link: https://lore.kernel.org/lkml/20250602041118.GA2675383@ZenIV/ [ Applied as the 'sed' script Al suggested - Linus ] Signed-off-by: Linus Torvalds

arch: remove mk_pmd()

2025-05-12T00:48:04+00:00

There are now no callers of mk_huge_pmd() and mk_pmd(). Remove them. Link: https://lkml.kernel.org/r/20250402181709.2386022-12-willy@infradead.org Signed-off-by: Matthew Wilcox (Oracle) Cc: Zi Yan Cc: Alexander Gordeev Cc: Andreas Larsson Cc: Anton Ivanov Cc: Dave Hansen Cc: David Hildenbrand Cc: "David S. Miller" Cc: Geert Uytterhoeven Cc: Johannes Berg Cc: Muchun Song Cc: Richard Weinberger Cc: Signed-off-by: Andrew Morton

mm: introduce a common definition of mk_pte()

2025-05-12T00:48:02+00:00

Most architectures simply call pfn_pte(). Centralise that as the normal definition and remove the definition of mk_pte() from the architectures which have either that exact definition or something similar. Link: https://lkml.kernel.org/r/20250402181709.2386022-3-willy@infradead.org Signed-off-by: Matthew Wilcox (Oracle) Acked-by: Geert Uytterhoeven # m68k Acked-by: David Hildenbrand Reviewed-by: Alexander Gordeev # s390 Cc: Zi Yan Cc: Andreas Larsson Cc: Anton Ivanov Cc: Dave Hansen Cc: "David S. Miller" Cc: Johannes Berg Cc: Muchun Song Cc: Richard Weinberger Cc: Signed-off-by: Andrew Morton

mm: implement update_mmu_tlb() using update_mmu_tlb_range()

2024-07-04T02:29:57+00:00

Let's make update_mmu_tlb() simply a generic wrapper around update_mmu_tlb_range(). Only the latter can now be overridden by the architecture. We can now remove __HAVE_ARCH_UPDATE_MMU_TLB as well. Link: https://lkml.kernel.org/r/20240522061204.117421-3-libang.li@antgroup.com Signed-off-by: Bang Li Acked-by: David Hildenbrand Cc: Chris Zankel Cc: Huacai Chen Cc: Lance Yang Cc: Max Filippov Cc: Palmer Dabbelt Cc: Paul Walmsley Cc: Ryan Roberts Cc: Thomas Bogendoerfer Signed-off-by: Andrew Morton

mm: add update_mmu_tlb_range()

2024-07-04T02:29:57+00:00

Patch series "Add update_mmu_tlb_range() to simplify code", v4. This series of commits mainly adds the update_mmu_tlb_range() to batch update tlb in an address range and implement update_mmu_tlb() using update_mmu_tlb_range(). After commit 19eaf44954df ("mm: thp: support allocation of anonymous multi-size THP"), We may need to batch update tlb of a certain address range by calling update_mmu_tlb() in a loop. Using the update_mmu_tlb_range(), we can simplify the code and possibly reduce the execution of some unnecessary code in some architectures. This patch (of 3): Add update_mmu_tlb_range(), we can batch update tlb of an address range. Link: https://lkml.kernel.org/r/20240522061204.117421-1-libang.li@antgroup.com Link: https://lkml.kernel.org/r/20240522061204.117421-2-libang.li@antgroup.com Signed-off-by: Bang Li Acked-by: David Hildenbrand Cc: Chris Zankel Cc: Huacai Chen Cc: Lance Yang Cc: Max Filippov Cc: Palmer Dabbelt Cc: Paul Walmsley Cc: Ryan Roberts Cc: Thomas Bogendoerfer Signed-off-by: Andrew Morton

mm/mglru: add dummy pmd_dirty()

2024-01-05T18:17:44+00:00

Add dummy pmd_dirty() for architectures that don't provide it. This is similar to commit 6617da8fb565 ("mm: add dummy pmd_young() for architectures not having it"). Link: https://lkml.kernel.org/r/20231227141205.2200125-5-kinseyho@google.com Reported-by: kernel test robot Closes: https://lore.kernel.org/oe-kbuild-all/202312210606.1Etqz3M4-lkp@intel.com/ Closes: https://lore.kernel.org/oe-kbuild-all/202312210042.xQEiqlEh-lkp@intel.com/ Signed-off-by: Kinsey Ho Suggested-by: Yu Zhao Cc: Aneesh Kumar K.V Cc: Donet Tom Signed-off-by: Andrew Morton

Merge tag 'x86_shstk_for_6.6-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

2023-08-31T19:20:12+00:00

Pull x86 shadow stack support from Dave Hansen: "This is the long awaited x86 shadow stack support, part of Intel's Control-flow Enforcement Technology (CET). CET consists of two related security features: shadow stacks and indirect branch tracking. This series implements just the shadow stack part of this feature, and just for userspace. The main use case for shadow stack is providing protection against return oriented programming attacks. It works by maintaining a secondary (shadow) stack using a special memory type that has protections against modification. When executing a CALL instruction, the processor pushes the return address to both the normal stack and to the special permission shadow stack. Upon RET, the processor pops the shadow stack copy and compares it to the normal stack copy. For more information, refer to the links below for the earlier versions of this patch set" Link: https://lore.kernel.org/lkml/20220130211838.8382-1-rick.p.edgecombe@intel.com/ Link: https://lore.kernel.org/lkml/20230613001108.3040476-1-rick.p.edgecombe@intel.com/ * tag 'x86_shstk_for_6.6-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (47 commits) x86/shstk: Change order of __user in type x86/ibt: Convert IBT selftest to asm x86/shstk: Don't retry vm_munmap() on -EINTR x86/kbuild: Fix Documentation/ reference x86/shstk: Move arch detail comment out of core mm x86/shstk: Add ARCH_SHSTK_STATUS x86/shstk: Add ARCH_SHSTK_UNLOCK x86: Add PTRACE interface for shadow stack selftests/x86: Add shadow stack test x86/cpufeatures: Enable CET CR4 bit for shadow stack x86/shstk: Wire in shadow stack interface x86: Expose thread features in /proc/$PID/status x86/shstk: Support WRSS for userspace x86/shstk: Introduce map_shadow_stack syscall x86/shstk: Check that signal frame is shadow stack mem x86/shstk: Check that SSP is aligned on sigreturn x86/shstk: Handle signals for shadow stack x86/shstk: Introduce routines modifying shstk x86/shstk: Handle thread shadow stack x86/shstk: Add user-mode shadow stack support ...

mips: implement the new page table range API

2023-08-24T23:20:22+00:00

Rename _PFN_SHIFT to PFN_PTE_SHIFT. Convert a few places to call set_pte() instead of set_pte_at(). Add set_ptes(), update_mmu_cache_range(), flush_icache_pages() and flush_dcache_folio(). Change the PG_arch_1 (aka PG_dcache_dirty) flag from being per-page to per-folio. Link: https://lkml.kernel.org/r/20230802151406.3735276-18-willy@infradead.org Signed-off-by: Matthew Wilcox (Oracle) Acked-by: Mike Rapoport (IBM) Cc: Thomas Bogendoerfer Signed-off-by: Andrew Morton