kernel/linux.git/arch/mips/mm/cache.c, branch v6.6.141

mips: use nth_page() in place of direct struct page manipulation

2023-11-28T17:20:05+00:00

commit aa5fe31b6b59210cb4ea28a59e68781f48eeca74 upstream. __flush_dcache_pages() is called during hugetlb migration via migrate_pages() -> migrate_hugetlbs() -> unmap_and_move_huge_page() -> move_to_new_folio() -> flush_dcache_folio(). And with hugetlb and without sparsemem vmemmap, struct page is not guaranteed to be contiguous beyond a section. Use nth_page() instead. Without the fix, a wrong address might be used for data cache page flush. No bug is reported. The fix comes from code inspection. Link: https://lkml.kernel.org/r/20230913201248.452081-6-zi.yan@sent.com Fixes: 15fa3e8e3269 ("mips: implement the new page table range API") Signed-off-by: Zi Yan Cc: David Hildenbrand Cc: Matthew Wilcox (Oracle) Cc: Mike Kravetz Cc: Mike Rapoport (IBM) Cc: Muchun Song Cc: Thomas Bogendoerfer Cc: Signed-off-by: Andrew Morton Signed-off-by: Greg Kroah-Hartman

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

MIPS: mm: Remove local_cache_flush_page

2023-04-05T08:08:53+00:00

After ide.h is gone, there are no users of local_cache_flush_page() left. Signed-off-by: Thomas Bogendoerfer

MIPS: Move declaration of bcache ops to cache.c

2023-04-05T07:45:08+00:00

bcache is not tied to CPU's cache interface. Just move those declaration to cache.c so it can be avaialble to CPU with all cache types. Signed-off-by: Jiaxun Yang Signed-off-by: Thomas Bogendoerfer

mips/mm: enable ARCH_HAS_VM_GET_PAGE_PROT

2022-07-18T00:14:40+00:00

This enables ARCH_HAS_VM_GET_PAGE_PROT on the platform and exports standard vm_get_page_prot() implementation via DECLARE_VM_GET_PAGE_PROT, which looks up a private and static protection_map[] array. Subsequently all __SXXX and __PXXX macros can be dropped which are no longer needed. Link: https://lkml.kernel.org/r/20220711070600.2378316-21-anshuman.khandual@arm.com Signed-off-by: Anshuman Khandual Cc: Thomas Bogendoerfer Cc: Arnd Bergmann Cc: Brian Cain Cc: Catalin Marinas Cc: Christophe Leroy Cc: Christoph Hellwig Cc: Christoph Hellwig Cc: Chris Zankel Cc: "David S. Miller" Cc: Dinh Nguyen Cc: Geert Uytterhoeven Cc: Guo Ren Cc: Heiko Carstens Cc: Huacai Chen Cc: Ingo Molnar Cc: "James E.J. Bottomley" Cc: Jeff Dike Cc: Jonas Bonn Cc: Michael Ellerman Cc: Michal Simek Cc: Nicholas Piggin Cc: Palmer Dabbelt Cc: Paul Mackerras Cc: Paul Walmsley Cc: Richard Henderson Cc: Rich Felker Cc: Russell King Cc: Sam Ravnborg Cc: Stafford Horne Cc: Thomas Gleixner Cc: Vasily Gorbik Cc: Vineet Gupta Cc: WANG Xuerui Cc: Will Deacon Cc: Yoshinori Sato Signed-off-by: Andrew Morton

MIPS: Remove TX39XX support

2022-03-01T09:07:22+00:00

No (active) developer owns this hardware, so let's remove Linux support. Signed-off-by: Thomas Bogendoerfer Acked-by: Guenter Roeck Reviewed-by: Geert Uytterhoeven Tested-by: Geert Uytterhoeven Acked-by: Atsushi Nemoto

Revert "MIPS: make userspace mapping young by default"

2021-06-05T15:58:11+00:00

This reverts commit f685a533a7fab35c5d069dcd663f59c8e4171a75. The MIPS cache flush logic needs to know whether the mapping was already established to decide how to flush caches. This is done by checking the valid bit in the PTE. The commit above breaks this logic by setting the valid in the PTE in new mappings, which causes kernel crashes. Link: https://lkml.kernel.org/r/20210526094335.92948-1-tsbogend@alpha.franken.de Fixes: f685a533a7f ("MIPS: make userspace mapping young by default") Reported-by: Zhou Yanjie Signed-off-by: Thomas Bogendoerfer Cc: Huang Pei Cc: Nicholas Piggin Cc: Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

mm: move page_mapping_file to pagemap.h

2021-04-30T18:20:37+00:00

page_mapping_file() is only used by some architectures, and then it is usually only used in one place. Make it a static inline function so other architectures don't have to carry this dead code. Link: https://lkml.kernel.org/r/20210317123011.350118-1-willy@infradead.org Signed-off-by: Matthew Wilcox (Oracle) Reviewed-by: David Hildenbrand Acked-by: Mike Rapoport Cc: Huang Ying Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

MIPS: make userspace mapping young by default

2021-02-26T17:41:05+00:00

MIPS page fault path(except huge page) takes 3 exceptions (1 TLB Miss + 2 TLB Invalid), butthe second TLB Invalid exception is just triggered by __update_tlb from do_page_fault writing tlb without _PAGE_VALID set. With this patch, user space mapping prot is made young by default (with both _PAGE_VALID and _PAGE_YOUNG set), and it only take 1 TLB Miss + 1 TLB Invalid exception Remove pte_sw_mkyoung without polluting MM code and make page fault delay of MIPS on par with other architecture Link: https://lkml.kernel.org/r/20210204013942.8398-1-huangpei@loongson.cn Signed-off-by: Huang Pei Reviewed-by: Nicholas Piggin Acked-by: Acked-by: Thomas Bogendoerfer Cc: Christophe Leroy Cc: Cc: Bibo Mao Cc: Jiaxun Yang Cc: Paul Burton Cc: Li Xuefeng Cc: Yang Tiezhu Cc: Gao Juxin Cc: Fuxin Zhang Cc: Huacai Chen Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

MIPS: mm:remove function __uncached_access()

2021-01-27T20:52:01+00:00

MIPS can now use the default uncached_access like other archs. Signed-off-by: Yanteng Si Acked-by: Greg Kroah-Hartman Signed-off-by: Thomas Bogendoerfer