linux/arch/arc, branch for-next

mm: introduce cpu_icache_is_aliasing() across all architectures

2024-12-19T03:04:43Z

In commit eacd0e950dc2 ("ARC: [mm] Lazy D-cache flush (non aliasing VIPT)"), arc adds the need to flush dcache to make icache see the code page change. This also requires special handling for clear_user_(high)page(). Introduce cpu_icache_is_aliasing() to make MM code query special clear_user_(high)page() easier. This will be used by the following commit. Link: https://lkml.kernel.org/r/20241209182326.2955963-1-ziy@nvidia.com Fixes: 5708d96da20b ("mm: avoid zeroing user movable page twice with init_on_alloc=1") Signed-off-by: Zi Yan Suggested-by: Mathieu Desnoyers Reviewed-by: Mathieu Desnoyers Acked-by: Vlastimil Babka Cc: Alexander Potapenko Cc: David Hildenbrand Cc: Geert Uytterhoeven Cc: John Hubbard Cc: Kees Cook Cc: Kefeng Wang Cc: Matthew Wilcox Cc: Miaohe Lin Cc: Ryan Roberts Cc: Vineet Gupta Signed-off-by: Andrew Morton

ARC: build: Try to guess GCC variant of cross compiler

2024-12-13T22:39:24Z

ARC GCC compiler is packaged starting from Fedora 39i and the GCC variant of cross compile tools has arc-linux-gnu- prefix and not arc-linux-. This is causing that CROSS_COMPILE variable is left unset. This change allows builds without need to supply CROSS_COMPILE argument if distro package is used. Before this change: $ make -j 128 ARCH=arc W=1 drivers/infiniband/hw/mlx4/ gcc: warning: ‘-mcpu=’ is deprecated; use ‘-mtune=’ or ‘-march=’ instead gcc: error: unrecognized command-line option ‘-mmedium-calls’ gcc: error: unrecognized command-line option ‘-mlock’ gcc: error: unrecognized command-line option ‘-munaligned-access’ [1] https://packages.fedoraproject.org/pkgs/cross-gcc/gcc-arc-linux-gnu/index.html Signed-off-by: Leon Romanovsky Signed-off-by: Vineet Gupta

ARC: bpf: Correct conditional check in 'check_jmp_32'

2024-12-10T18:12:56Z

The original code checks 'if (ARC_CC_AL)', which is always true since ARC_CC_AL is a constant. This makes the check redundant and likely obscures the intention of verifying whether the jump is conditional. Updates the code to check cond == ARC_CC_AL instead, reflecting the intent to differentiate conditional from unconditional jumps. Suggested-by: Vadim Fedorenko Reviewed-by: Vadim Fedorenko Acked-by: Shahab Vahedi Signed-off-by: Hardevsinh Palaniya Signed-off-by: Vineet Gupta

ARC: dts: Replace deprecated snps,nr-gpios property for snps,dw-apb-gpio-port devices

2024-12-10T18:12:56Z

snps,dw-apb-gpio-port is deprecated since commit ef42a8da3cf3 ("dt-bindings: gpio: dwapb: Add ngpios property support"). The respective driver supports this since commit 7569486d79ae ("gpio: dwapb: Add ngpios DT-property support") which is included in Linux v5.10-rc1. This change was created using git grep -l snps,nr-gpios arch/arc/boot/dts | xargs perl -p -i -e 's/\bsnps,nr-gpios\b/ngpios/ . Signed-off-by: Uwe Kleine-König Signed-off-by: Vineet Gupta

ARC: build: Use __force to suppress per-CPU cmpxchg warnings

2024-12-10T18:12:56Z

Currently, the cast of the first argument to cmpxchg_emu_u8() drops the __percpu address-space designator, which results in sparse complaints when applying cmpxchg() to per-CPU variables in ARC. Therefore, use __force to suppress these complaints, given that this does not pertain to cmpxchg() semantics, which are plently well-defined on variables in general, whether per-CPU or otherwise. Reported-by: kernel test robot Closes: https://lore.kernel.org/oe-kbuild-all/202409251336.ToC0TvWB-lkp@intel.com/ Signed-off-by: Paul E. McKenney Cc: Signed-off-by: Vineet Gupta

ARC: fix reference of dependency for PAE40 config

2024-12-10T18:12:56Z

Commit d71e629bed5b ("ARC: build: disallow invalid PAE40 + 4K page config") reworks the build dependencies for ARC_HAS_PAE40, and accidentally refers to the non-existing config option MMU_V4 rather than the intended option ARC_MMU_V4. Note the missing prefix in the name here. Refer to the intended config option in the dependency of the ARC_HAS_PAE40 config. Fixes: d71e629bed5b ("ARC: build: disallow invalid PAE40 + 4K page config") Signed-off-by: Lukas Bulwahn Signed-off-by: Vineet Gupta

ARC: build: disallow invalid PAE40 + 4K page config

2024-12-10T18:12:56Z

The config option being built was | CONFIG_ARC_MMU_V4=y | CONFIG_ARC_PAGE_SIZE_4K=y | CONFIG_HIGHMEM=y | CONFIG_ARC_HAS_PAE40=y This was hitting a BUILD_BUG_ON() since a 4K page can't hoist 1k, 8-byte PTE entries (8 byte due to PAE40). BUILD_BUG_ON() is a good last ditch resort, but such a config needs to be disallowed explicitly in Kconfig. Side-note: the actual fix is single liner dependency, but while at it cleaned out a few things: - 4K dependency on MMU v3 or v4 is always true, since 288ff7de62af09 ("ARC: retire MMUv1 and MMUv2 support") - PAE40 dependency in on MMU ver not really ISA, although that follows eventually. Reported-by: kernel test robot Closes: https://lore.kernel.org/oe-kbuild-all/202409160223.xydgucbY-lkp@intel.com/ Signed-off-by: Vineet Gupta

arc: rename aux.h to arc_aux.h

2024-12-10T18:12:56Z

The goal is to clean-up Linux repository from AUX file names, because the use of such file names is prohibited on other operating systems such as Windows, so the Linux repository cannot be cloned and edited on them. Reviewed-by: Shahab Vahedi Signed-off-by: Benjamin Szőke Signed-off-by: Vineet Gupta

Merge tag 'mm-stable-2024-11-18-19-27' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

2024-11-23T17:58:07Z

Pull MM updates from Andrew Morton: - The series "zram: optimal post-processing target selection" from Sergey Senozhatsky improves zram's post-processing selection algorithm. This leads to improved memory savings. - Wei Yang has gone to town on the mapletree code, contributing several series which clean up the implementation: - "refine mas_mab_cp()" - "Reduce the space to be cleared for maple_big_node" - "maple_tree: simplify mas_push_node()" - "Following cleanup after introduce mas_wr_store_type()" - "refine storing null" - The series "selftests/mm: hugetlb_fault_after_madv improvements" from David Hildenbrand fixes this selftest for s390. - The series "introduce pte_offset_map_{ro|rw}_nolock()" from Qi Zheng implements some rationaizations and cleanups in the page mapping code. - The series "mm: optimize shadow entries removal" from Shakeel Butt optimizes the file truncation code by speeding up the handling of shadow entries. - The series "Remove PageKsm()" from Matthew Wilcox completes the migration of this flag over to being a folio-based flag. - The series "Unify hugetlb into arch_get_unmapped_area functions" from Oscar Salvador implements a bunch of consolidations and cleanups in the hugetlb code. - The series "Do not shatter hugezeropage on wp-fault" from Dev Jain takes away the wp-fault time practice of turning a huge zero page into small pages. Instead we replace the whole thing with a THP. More consistent cleaner and potentiall saves a large number of pagefaults. - The series "percpu: Add a test case and fix for clang" from Andy Shevchenko enhances and fixes the kernel's built in percpu test code. - The series "mm/mremap: Remove extra vma tree walk" from Liam Howlett optimizes mremap() by avoiding doing things which we didn't need to do. - The series "Improve the tmpfs large folio read performance" from Baolin Wang teaches tmpfs to copy data into userspace at the folio size rather than as individual pages. A 20% speedup was observed. - The series "mm/damon/vaddr: Fix issue in damon_va_evenly_split_region()" fro Zheng Yejian fixes DAMON splitting. - The series "memcg-v1: fully deprecate charge moving" from Shakeel Butt removes the long-deprecated memcgv2 charge moving feature. - The series "fix error handling in mmap_region() and refactor" from Lorenzo Stoakes cleanup up some of the mmap() error handling and addresses some potential performance issues. - The series "x86/module: use large ROX pages for text allocations" from Mike Rapoport teaches x86 to use large pages for read-only-execute module text. - The series "page allocation tag compression" from Suren Baghdasaryan is followon maintenance work for the new page allocation profiling feature. - The series "page->index removals in mm" from Matthew Wilcox remove most references to page->index in mm/. A slow march towards shrinking struct page. - The series "damon/{self,kunit}tests: minor fixups for DAMON debugfs interface tests" from Andrew Paniakin performs maintenance work for DAMON's self testing code. - The series "mm: zswap swap-out of large folios" from Kanchana Sridhar improves zswap's batching of compression and decompression. It is a step along the way towards using Intel IAA hardware acceleration for this zswap operation. - The series "kasan: migrate the last module test to kunit" from Sabyrzhan Tasbolatov completes the migration of the KASAN built-in tests over to the KUnit framework. - The series "implement lightweight guard pages" from Lorenzo Stoakes permits userapace to place fault-generating guard pages within a single VMA, rather than requiring that multiple VMAs be created for this. Improved efficiencies for userspace memory allocators are expected. - The series "memcg: tracepoint for flushing stats" from JP Kobryn uses tracepoints to provide increased visibility into memcg stats flushing activity. - The series "zram: IDLE flag handling fixes" from Sergey Senozhatsky fixes a zram buglet which potentially affected performance. - The series "mm: add more kernel parameters to control mTHP" from Maíra Canal enhances our ability to control/configuremultisize THP from the kernel boot command line. - The series "kasan: few improvements on kunit tests" from Sabyrzhan Tasbolatov has a couple of fixups for the KASAN KUnit tests. - The series "mm/list_lru: Split list_lru lock into per-cgroup scope" from Kairui Song optimizes list_lru memory utilization when lockdep is enabled. * tag 'mm-stable-2024-11-18-19-27' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm: (215 commits) cma: enforce non-zero pageblock_order during cma_init_reserved_mem() mm/kfence: add a new kunit test test_use_after_free_read_nofault() zram: fix NULL pointer in comp_algorithm_show() memcg/hugetlb: add hugeTLB counters to memcg vmstat: call fold_vm_zone_numa_events() before show per zone NUMA event mm: mmap_lock: check trace_mmap_lock_$type_enabled() instead of regcount zram: ZRAM_DEF_COMP should depend on ZRAM MAINTAINERS/MEMORY MANAGEMENT: add document files for mm Docs/mm/damon: recommend academic papers to read and/or cite mm: define general function pXd_init() kmemleak: iommu/iova: fix transient kmemleak false positive mm/list_lru: simplify the list_lru walk callback function mm/list_lru: split the lock to per-cgroup scope mm/list_lru: simplify reparenting and initial allocation mm/list_lru: code clean up for reparenting mm/list_lru: don't export list_lru_add mm/list_lru: don't pass unnecessary key parameters kasan: add kunit tests for kmalloc_track_caller, kmalloc_node_track_caller kasan: change kasan_atomics kunit test as KUNIT_CASE_SLOW kasan: use EXPORT_SYMBOL_IF_KUNIT to export symbols ...

Merge tag 'asm-generic-3.13' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic

2024-11-20T23:13:02Z

Pull asm-generic updates from Arnd Bergmann: "These are a number of unrelated cleanups, generally simplifying the architecture specific header files: - A series from Al Viro simplifies asm/vga.h, after it turns out that most of it can be generalized. - A series from Julian Vetter adds a common version of memcpy_{to,from}io() and memset_io() and changes most architectures to use that instead of their own implementation - A series from Niklas Schnelle concludes his work to make PC style inb()/outb() optional - Nicolas Pitre contributes improvements for the generic do_div() helper - Christoph Hellwig adds a generic version of page_to_phys() and phys_to_page(), replacing the slightly different architecture specific definitions. - Uwe Kleine-Koenig has a minor cleanup for ioctl definitions" * tag 'asm-generic-3.13' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic: (24 commits) empty include/asm-generic/vga.h sparc: get rid of asm/vga.h asm/vga.h: don't bother with scr_mem{cpy,move}v() unless we need to vt_buffer.h: get rid of dead code in default scr_...() instances tty: serial: export serial_8250_warn_need_ioport lib/iomem_copy: fix kerneldoc format style hexagon: simplify asm/io.h for !HAS_IOPORT loongarch: Use new fallback IO memcpy/memset csky: Use new fallback IO memcpy/memset arm64: Use new fallback IO memcpy/memset New implementation for IO memcpy and IO memset watchdog: Add HAS_IOPORT dependency for SBC8360 and SBC7240 __arch_xprod64(): make __always_inline when optimizing for performance ARM: div64: improve __arch_xprod_64() asm-generic/div64: optimize/simplify __div64_const32() lib/math/test_div64: add some edge cases relevant to __div64_const32() asm-generic: add an optional pfn_valid check to page_to_phys asm-generic: provide generic page_to_phys and phys_to_page implementations asm-generic/io.h: Remove I/O port accessors for HAS_IOPORT=n tty: serial: handle HAS_IOPORT dependencies ...