Changes in Kconfig

9cdca336677b4d15579ec462e33c8a330ab3a9de - Merge tag 'integrity-v7.1' of git://git.kernel.org/pub/scm/linux/kernel/git/zohar/linux-integrity

Sat, 18 Apr 2026 00:42:01 +0200

Merge tag 'integrity-v7.1' of git://git.kernel.org/pub/scm/linux/kernel/git/zohar/linux-integrityPull integrity updates from Mimi Zohar: "There are two main changes, one feature removal, some code cleanup, and a number of bug fixes. Main changes: - Detecting secure boot mode was limited to IMA. Make detecting secure boot mode accessible to EVM and other LSMs - IMA sigv3 support was limited to fsverity. Add IMA sigv3 support for IMA regular file hashes and EVM portable signatures Remove: - Remove IMA support for asychronous hash calculation originally added for hardware acceleration Cleanup: - Remove unnecessary Kconfig CONFIG_MODULE_SIG and CONFIG_KEXEC_SIG tests - Add descriptions of the IMA atomic flags Bug fixes: - Like IMA, properly limit EVM "fix" mode - Define and call evm_fix_hmac() to update security.evm - Fallback to using i_version to detect file change for filesystems that do not support STATX_CHANGE_COOKIE - Address missing kernel support for configured (new) TPM hash algorithms - Add missing crypto_shash_final() return value"* tag 'integrity-v7.1' of git://git.kernel.org/pub/scm/linux/kernel/git/zohar/linux-integrity: evm: Enforce signatures version 3 with new EVM policy 'bit 3' integrity: Allow sigv3 verification on EVM_XATTR_PORTABLE_DIGSIG ima: add support to require IMA sigv3 signatures ima: add regular file data hash signature version 3 support ima: Define asymmetric_verify_v3() to verify IMA sigv3 signatures ima: remove buggy support for asynchronous hashes integrity: Eliminate weak definition of arch_get_secureboot() ima: Add code comments to explain IMA iint cache atomic_flags ima_fs: Correctly create securityfs files for unsupported hash algos ima: check return value of crypto_shash_final() in boot aggregate ima: Define and use a digest_size field in the ima_algo_desc structure powerpc/ima: Drop unnecessary check for CONFIG_MODULE_SIG ima: efi: Drop unnecessary check for CONFIG_MODULE_SIG/CONFIG_KEXEC_SIG ima: fallback to using i_version to detect file change evm: fix security.evm for a file with IMA signature s390: Drop unnecessary CONFIG_IMA_SECURE_AND_OR_TRUSTED_BOOT evm: Don't enable fix mode when secure boot is enabled integrity: Make arch_ima_get_secureboot integrity-wide List of files: /linux/arch/powerpc/Kconfig

334fbe734e687404f346eba7d5d96ed2b44d35ab - Merge tag 'mm-stable-2026-04-13-21-45' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

Wed, 15 Apr 2026 21:59:16 +0200

Merge tag 'mm-stable-2026-04-13-21-45' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mmPull MM updates from Andrew Morton: - "maple_tree: Replace big node with maple copy" (Liam Howlett) Mainly prepararatory work for ongoing development but it does reduce stack usage and is an improvement. - "mm, swap: swap table phase III: remove swap_map" (Kairui Song) Offers memory savings by removing the static swap_map. It also yields some CPU savings and implements several cleanups. - "mm: memfd_luo: preserve file seals" (Pratyush Yadav) File seal preservation to LUO's memfd code - "mm: zswap: add per-memcg stat for incompressible pages" (Jiayuan Chen) Additional userspace stats reportng to zswap - "arch, mm: consolidate empty_zero_page" (Mike Rapoport) Some cleanups for our handling of ZERO_PAGE() and zero_pfn - "mm/kmemleak: Improve scan_should_stop() implementation" (Zhongqiu Han) A robustness improvement and some cleanups in the kmemleak code - "Improve khugepaged scan logic" (Vernon Yang) Improve khugepaged scan logic and reduce CPU consumption by prioritizing scanning tasks that access memory frequently - "Make KHO Stateless" (Jason Miu) Simplify Kexec Handover by transitioning KHO from an xarray-based metadata tracking system with serialization to a radix tree data structure that can be passed directly to the next kernel - "mm: vmscan: add PID and cgroup ID to vmscan tracepoints" (Thomas Ballasi and Steven Rostedt) Enhance vmscan's tracepointing - "mm: arch/shstk: Common shadow stack mapping helper and VM_NOHUGEPAGE" (Catalin Marinas) Cleanup for the shadow stack code: remove per-arch code in favour of a generic implementation - "Fix KASAN support for KHO restored vmalloc regions" (Pasha Tatashin) Fix a WARN() which can be emitted the KHO restores a vmalloc area - "mm: Remove stray references to pagevec" (Tal Zussman) Several cleanups, mainly udpating references to "struct pagevec", which became folio_batch three years ago - "mm: Eliminate fake head pages from vmemmap optimization" (Kiryl Shutsemau) Simplify the HugeTLB vmemmap optimization (HVO) by changing how tail pages encode their relationship to the head page - "mm/damon/core: improve DAMOS quota efficiency for core layer filters" (SeongJae Park) Improve two problematic behaviors of DAMOS that makes it less efficient when core layer filters are used - "mm/damon: strictly respect min_nr_regions" (SeongJae Park) Improve DAMON usability by extending the treatment of the min_nr_regions user-settable parameter - "mm/page_alloc: pcp locking cleanup" (Vlastimil Babka) The proper fix for a previously hotfixed SMP=n issue. Code simplifications and cleanups ensued - "mm: cleanups around unmapping / zapping" (David Hildenbrand) A bunch of cleanups around unmapping and zapping. Mostly simplifications, code movements, documentation and renaming of zapping functions - "support batched checking of the young flag for MGLRU" (Baolin Wang) Batched checking of the young flag for MGLRU. It's part cleanups; one benchmark shows large performance benefits for arm64 - "memcg: obj stock and slab stat caching cleanups" (Johannes Weiner) memcg cleanup and robustness improvements - "Allow order zero pages in page reporting" (Yuvraj Sakshith) Enhance free page reporting - it is presently and undesirably order-0 pages when reporting free memory. - "mm: vma flag tweaks" (Lorenzo Stoakes) Cleanup work following from the recent conversion of the VMA flags to a bitmap - "mm/damon: add optional debugging-purpose sanity checks" (SeongJae Park) Add some more developer-facing debug checks into DAMON core - "mm/damon: test and document power-of-2 min_region_sz requirement" (SeongJae Park) An additional DAMON kunit test and makes some adjustments to the addr_unit parameter handling - "mm/damon/core: make passed_sample_intervals comparisons overflow-safe" (SeongJae Park) Fix a hard-to-hit time overflow issue in DAMON core - "mm/damon: improve/fixup/update ratio calculation, test and documentation" (SeongJae Park) A batch of misc/minor improvements and fixups for DAMON - "mm: move vma_(kernel|mmu)_pagesize() out of hugetlb.c" (David Hildenbrand) Fix a possible issue with dax-device when CONFIG_HUGETLB=n. Some code movement was required. - "zram: recompression cleanups and tweaks" (Sergey Senozhatsky) A somewhat random mix of fixups, recompression cleanups and improvements in the zram code - "mm/damon: support multiple goal-based quota tuning algorithms" (SeongJae Park) Extend DAMOS quotas goal auto-tuning to support multiple tuning algorithms that users can select - "mm: thp: reduce unnecessary start_stop_khugepaged()" (Breno Leitao) Fix the khugpaged sysfs handling so we no longer spam the logs with reams of junk when starting/stopping khugepaged - "mm: improve map count checks" (Lorenzo Stoakes) Provide some cleanups and slight fixes in the mremap, mmap and vma code - "mm/damon: support addr_unit on default monitoring targets for modules" (SeongJae Park) Extend the use of DAMON core's addr_unit tunable - "mm: khugepaged cleanups and mTHP prerequisites" (Nico Pache) Cleanups to khugepaged and is a base for Nico's planned khugepaged mTHP support - "mm: memory hot(un)plug and SPARSEMEM cleanups" (David Hildenbrand) Code movement and cleanups in the memhotplug and sparsemem code - "mm: remove CONFIG_ARCH_ENABLE_MEMORY_HOTREMOVE and cleanup CONFIG_MIGRATION" (David Hildenbrand) Rationalize some memhotplug Kconfig support - "change young flag check functions to return bool" (Baolin Wang) Cleanups to change all young flag check functions to return bool - "mm/damon/sysfs: fix memory leak and NULL dereference issues" (Josh Law and SeongJae Park) Fix a few potential DAMON bugs - "mm/vma: convert vm_flags_t to vma_flags_t in vma code" (Lorenzo Stoakes) Convert a lot of the existing use of the legacy vm_flags_t data type to the new vma_flags_t type which replaces it. Mainly in the vma code. - "mm: expand mmap_prepare functionality and usage" (Lorenzo Stoakes) Expand the mmap_prepare functionality, which is intended to replace the deprecated f_op->mmap hook which has been the source of bugs and security issues for some time. Cleanups, documentation, extension of mmap_prepare into filesystem drivers - "mm/huge_memory: refactor zap_huge_pmd()" (Lorenzo Stoakes) Simplify and clean up zap_huge_pmd(). Additional cleanups around vm_normal_folio_pmd() and the softleaf functionality are performed.* tag 'mm-stable-2026-04-13-21-45' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm: (369 commits) mm: fix deferred split queue races during migration mm/khugepaged: fix issue with tracking lock mm/huge_memory: add and use has_deposited_pgtable() mm/huge_memory: add and use normal_or_softleaf_folio_pmd() mm: add softleaf_is_valid_pmd_entry(), pmd_to_softleaf_folio() mm/huge_memory: separate out the folio part of zap_huge_pmd() mm/huge_memory: use mm instead of tlb->mm mm/huge_memory: remove unnecessary sanity checks mm/huge_memory: deduplicate zap deposited table call mm/huge_memory: remove unnecessary VM_BUG_ON_PAGE() mm/huge_memory: add a common exit path to zap_huge_pmd() mm/huge_memory: handle buggy PMD entry in zap_huge_pmd() mm/huge_memory: have zap_huge_pmd return a boolean, add kdoc mm/huge: avoid big else branch in zap_huge_pmd() mm/huge_memory: simplify vma_is_specal_huge() mm: on remap assert that input range within the proposed VMA mm: add mmap_action_map_kernel_pages[_full]() uio: replace deprecated mmap hook with mmap_prepare in uio_info drivers: hv: vmbus: replace deprecated mmap hook with mmap_prepare mm: allow handling of stacked mmap_prepare hooks in more drivers ... List of files: /linux/arch/powerpc/Kconfig

078f80f909ba9fa3060e89dc634ff4b1defc43d3 - mm: remove CONFIG_ARCH_ENABLE_MEMORY_HOTREMOVE

Thu, 19 Mar 2026 09:19:40 +0100

mm: remove CONFIG_ARCH_ENABLE_MEMORY_HOTREMOVEPatch series "mm: remove CONFIG_ARCH_ENABLE_MEMORY_HOTREMOVE and cleanupCONFIG_MIGRATION".While working on memory hotplug code cleanups, I realized thatCONFIG_ARCH_ENABLE_MEMORY_HOTREMOVE is not really required anymore.Changing that revealed some rather nasty looking CONFIG_MIGRATIONhandling.Let's clean that up by introducing a dedicated CONFIG_NUMA_MIGRATIONoption and reducing the dependencies that CONFIG_MIGRATION has.This patch (of 2):All architectures that select CONFIG_ARCH_ENABLE_MEMORY_HOTREMOVE alsoselect CONFIG_ARCH_ENABLE_MEMORY_HOTPLUG. So we can just removeCONFIG_ARCH_ENABLE_MEMORY_HOTREMOVE.For CONFIG_MIGRATION, make it depend on CONFIG_MEMORY_HOTREMOVE instead,and make CONFIG_MEMORY_HOTREMOVE select CONFIG_MIGRATION (just likeCONFIG_CMA and CONFIG_COMPACTION already do).We'll clean up CONFIG_MIGRATION next.Link: https://lkml.kernel.org/r/20260319-config_migration-v1-0-42270124966f@kernel.orgLink: https://lkml.kernel.org/r/20260319-config_migration-v1-1-42270124966f@kernel.orgSigned-off-by: David Hildenbrand (Arm) Acked-by: Zi Yan Reviewed-by: Lorenzo Stoakes (Oracle) Reviewed-by: Joshua Hahn Reviewed-by: Gregory Price Reviewed-by: Mike Rapoport (Microsoft) Reviewed-by: Jonathan Cameron Cc: Albert Ou Cc: Alexander Gordeev Cc: Alexandre Ghiti Cc: Alistair Popple Cc: "Borislav Petkov (AMD)" Cc: Byungchul Park Cc: Catalin Marinas Cc: Christian Borntraeger Cc: Heiko Carstens Cc: "H. Peter Anvin" Cc: Huacai Chen Cc: "Huang, Ying" Cc: Ingo Molnar Cc: Liam Howlett Cc: Madhavan Srinivasan Cc: Matthew Brost Cc: Michael Ellerman Cc: Michal Hocko Cc: Nicholas Piggin Cc: Palmer Dabbelt Cc: Rakie Kim Cc: Sebastian Andrzej Siewior Cc: Steven Rostedt Cc: Suren Baghdasaryan Cc: Sven Schnelle Cc: Vasily Gorbik Cc: WANG Xuerui Cc: Will Deacon Signed-off-by: Andrew Morton List of files: /linux/arch/powerpc/Kconfig

f26ad12356a275ab303d5d3af4790ad94acc20d7 - powerpc/audit: Convert powerpc to AUDIT_ARCH_COMPAT_GENERIC

Tue, 10 Mar 2026 16:08:07 +0100

powerpc/audit: Convert powerpc to AUDIT_ARCH_COMPAT_GENERICCommit e65e1fc2d24b ("[PATCH] syscall class hookup for all normaltargets") added generic support for AUDIT but that didn't includesupport for bi-arch like powerpc.Commit 4b58841149dc ("audit: Add generic compat syscall support")added generic support for bi-arch.Convert powerpc to that bi-arch generic audit support.With this change generated text is similar.Thomas has confirmed that the previously failing filter_exclude/testis now successful both without and with this patch, see [1][1] https://lore.kernel.org/all/20260306115350-ef265661-6d6b-4043-9bd0-8e6b437d0d67@linutronix.de/Link: https://github.com/linuxppc/issues/issues/412Signed-off-by: Christophe Leroy Reviewed-by: Cédric Le Goater Signed-off-by: Madhavan Srinivasan Link: https://patch.msgid.link/261b1be5b8dc526b83d73e8281e682a73536ea28.1773155031.git.chleroy@kernel.org List of files: /linux/arch/powerpc/Kconfig

d1503aa9ab8057cb93367e0184528f61f7510845 - powerpc/64s: Add support for huge pfnmaps

Mon, 09 Mar 2026 13:38:38 +0100

powerpc/64s: Add support for huge pfnmapsThis uses _RPAGE_SW2 bit for the PMD and PUDs similar to PTEs.This also adds support for {pte,pmd,pud}_pgprot helpers needed forfollow_pfnmap APIs.This allows us to extend the PFN mappings, e.g. PCI MMIO bars whereit can grow as large as 8GB or even bigger, to map at PMD / PUD level.VFIO PCI core driver already supports fault handling at PMD / PUD levelfor more efficient BAR mappings.Reviewed-by: Christophe Leroy (CS GROUP) Signed-off-by: Ritesh Harjani (IBM) Signed-off-by: Madhavan Srinivasan Link: https://patch.msgid.link/6fca726574236f556dd4e1e259692e82a4c29e85.1773058761.git.ritesh.list@gmail.com List of files: /linux/arch/powerpc/Kconfig

7caedbb5ade345df0eec0bf01035c780919a9f56 - integrity: Eliminate weak definition of arch_get_secureboot()

Mon, 09 Mar 2026 21:37:02 +0100

integrity: Eliminate weak definition of arch_get_secureboot()security/integrity/secure_boot.c contains a single __weak function,which breaks recordmcount when building with clang: $ make -skj"$(nproc)" ARCH=powerpc LLVM=1 ppc64_defconfig security/integrity/secure_boot.o Cannot find symbol for section 2: .text. security/integrity/secure_boot.o: failedIntroduce a Kconfig symbol, CONFIG_HAVE_ARCH_GET_SECUREBOOT, to indicatethat an architecture provides a definition of arch_get_secureboot().Provide a static inline stub when this symbol is not defined to achievethe same effect as the __weak function, allowing secure_boot.c to beremoved altogether. Move the s390 definition of arch_get_secureboot()out of the CONFIG_KEXEC_FILE block to ensure it is always available, asit does not actually depend on KEXEC_FILE.Reported-by: Arnd Bergmann Fixes: 31a6a07eefeb ("integrity: Make arch_ima_get_secureboot integrity-wide")Signed-off-by: Nathan Chancellor Acked-by: Arnd Bergmann Signed-off-by: Mimi Zohar List of files: /linux/arch/powerpc/Kconfig

73cdf24e81e4eba52a40a6b10c6cf285d0ac23fd - powerpc64: make clang cross-build friendly

Tue, 27 Jan 2026 09:49:24 +0100

powerpc64: make clang cross-build friendlyARCH_USING_PATCHABLE_FUNCTION_ENTRY depends on toolchain support for-fpatchable-function-entry option. The current script that checksfor this support only handles GCC. Rename the script and extend itto detect support for -fpatchable-function-entry with Clang as well,allowing clean cross-compilation with Clang toolchains.Signed-off-by: Hari Bathini Tested-by: Venkat Rao Bagalkote Signed-off-by: Madhavan Srinivasan Link: https://patch.msgid.link/20260127084926.34497-2-hbathini@linux.ibm.com List of files: /linux/arch/powerpc/Kconfig

4cff5c05e076d2ee4e34122aa956b84a2eaac587 - Merge tag 'mm-stable-2026-02-11-19-22' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

Thu, 12 Feb 2026 20:32:37 +0100

Merge tag 'mm-stable-2026-02-11-19-22' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mmPull MM updates from Andrew Morton: - "powerpc/64s: do not re-activate batched TLB flush" makes arch_{enter|leave}_lazy_mmu_mode() nest properly (Alexander Gordeev) It adds a generic enter/leave layer and switches architectures to use it. Various hacks were removed in the process. - "zram: introduce compressed data writeback" implements data compression for zram writeback (Richard Chang and Sergey Senozhatsky) - "mm: folio_zero_user: clear page ranges" adds clearing of contiguous page ranges for hugepages. Large improvements during demand faulting are demonstrated (David Hildenbrand) - "memcg cleanups" tidies up some memcg code (Chen Ridong) - "mm/damon: introduce {,max_}nr_snapshots and tracepoint for damos stats" improves DAMOS stat's provided information, deterministic control, and readability (SeongJae Park) - "selftests/mm: hugetlb cgroup charging: robustness fixes" fixes a few issues in the hugetlb cgroup charging selftests (Li Wang) - "Fix va_high_addr_switch.sh test failure - again" addresses several issues in the va_high_addr_switch test (Chunyu Hu) - "mm/damon/tests/core-kunit: extend existing test scenarios" improves the KUnit test coverage for DAMON (Shu Anzai) - "mm/khugepaged: fix dirty page handling for MADV_COLLAPSE" fixes a glitch in khugepaged which was causing madvise(MADV_COLLAPSE) to transiently return -EAGAIN (Shivank Garg) - "arch, mm: consolidate hugetlb early reservation" reworks and consolidates a pile of straggly code related to reservation of hugetlb memory from bootmem and creation of CMA areas for hugetlb (Mike Rapoport) - "mm: clean up anon_vma implementation" cleans up the anon_vma implementation in various ways (Lorenzo Stoakes) - "tweaks for __alloc_pages_slowpath()" does a little streamlining of the page allocator's slowpath code (Vlastimil Babka) - "memcg: separate private and public ID namespaces" cleans up the memcg ID code and prevents the internal-only private IDs from being exposed to userspace (Shakeel Butt) - "mm: hugetlb: allocate frozen gigantic folio" cleans up the allocation of frozen folios and avoids some atomic refcount operations (Kefeng Wang) - "mm/damon: advance DAMOS-based LRU sorting" improves DAMOS's movement of memory betewwn the active and inactive LRUs and adds auto-tuning of the ratio-based quotas and of monitoring intervals (SeongJae Park) - "Support page table check on PowerPC" makes CONFIG_PAGE_TABLE_CHECK_ENFORCED work on powerpc (Andrew Donnellan) - "nodemask: align nodes_and{,not} with underlying bitmap ops" makes nodes_and() and nodes_andnot() propagate the return values from the underlying bit operations, enabling some cleanup in calling code (Yury Norov) - "mm/damon: hide kdamond and kdamond_lock from API callers" cleans up some DAMON internal interfaces (SeongJae Park) - "mm/khugepaged: cleanups and scan limit fix" does some cleanup work in khupaged and fixes a scan limit accounting issue (Shivank Garg) - "mm: balloon infrastructure cleanups" goes to town on the balloon infrastructure and its page migration function. Mainly cleanups, also some locking simplification (David Hildenbrand) - "mm/vmscan: add tracepoint and reason for kswapd_failures reset" adds additional tracepoints to the page reclaim code (Jiayuan Chen) - "Replace wq users and add WQ_PERCPU to alloc_workqueue() users" is part of Marco's kernel-wide migration from the legacy workqueue APIs over to the preferred unbound workqueues (Marco Crivellari) - "Various mm kselftests improvements/fixes" provides various unrelated improvements/fixes for the mm kselftests (Kevin Brodsky) - "mm: accelerate gigantic folio allocation" greatly speeds up gigantic folio allocation, mainly by avoiding unnecessary work in pfn_range_valid_contig() (Kefeng Wang) - "selftests/damon: improve leak detection and wss estimation reliability" improves the reliability of two of the DAMON selftests (SeongJae Park) - "mm/damon: cleanup kdamond, damon_call(), damos filter and DAMON_MIN_REGION" does some cleanup work in the core DAMON code (SeongJae Park) - "Docs/mm/damon: update intro, modules, maintainer profile, and misc" performs maintenance work on the DAMON documentation (SeongJae Park) - "mm: add and use vma_assert_stabilised() helper" refactors and cleans up the core VMA code. The main aim here is to be able to use the mmap write lock's lockdep state to perform various assertions regarding the locking which the VMA code requires (Lorenzo Stoakes) - "mm, swap: swap table phase II: unify swapin use" removes some old swap code (swap cache bypassing and swap synchronization) which wasn't working very well. Various other cleanups and simplifications were made. The end result is a 20% speedup in one benchmark (Kairui Song) - "enable PT_RECLAIM on more 64-bit architectures" makes PT_RECLAIM available on 64-bit alpha, loongarch, mips, parisc, and um. Various cleanups were performed along the way (Qi Zheng)* tag 'mm-stable-2026-02-11-19-22' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm: (325 commits) mm/memory: handle non-split locks correctly in zap_empty_pte_table() mm: move pte table reclaim code to memory.c mm: make PT_RECLAIM depends on MMU_GATHER_RCU_TABLE_FREE mm: convert __HAVE_ARCH_TLB_REMOVE_TABLE to CONFIG_HAVE_ARCH_TLB_REMOVE_TABLE config um: mm: enable MMU_GATHER_RCU_TABLE_FREE parisc: mm: enable MMU_GATHER_RCU_TABLE_FREE mips: mm: enable MMU_GATHER_RCU_TABLE_FREE LoongArch: mm: enable MMU_GATHER_RCU_TABLE_FREE alpha: mm: enable MMU_GATHER_RCU_TABLE_FREE mm: change mm/pt_reclaim.c to use asm/tlb.h instead of asm-generic/tlb.h mm/damon/stat: remove __read_mostly from memory_idle_ms_percentiles zsmalloc: make common caches global mm: add SPDX id lines to some mm source files mm/zswap: use %pe to print error pointers mm/vmscan: use %pe to print error pointers mm/readahead: fix typo in comment mm: khugepaged: fix NR_FILE_PAGES and NR_SHMEM in collapse_file() mm: refactor vma_map_pages to use vm_insert_pages mm/damon: unify address range representation with damon_addr_range mm/cma: replace snprintf with strscpy in cma_new_area ... List of files: /linux/arch/powerpc/Kconfig

086498aed3f68febb58df7e6141962942abb8944 - mm: convert __HAVE_ARCH_TLB_REMOVE_TABLE to CONFIG_HAVE_ARCH_TLB_REMOVE_TABLE config

Tue, 27 Jan 2026 13:13:00 +0100

mm: convert __HAVE_ARCH_TLB_REMOVE_TABLE to CONFIG_HAVE_ARCH_TLB_REMOVE_TABLE configFor architectures that define __HAVE_ARCH_TLB_REMOVE_TABLE, the pagetables at the pmd/pud level are generally not of struct ptdesc type, anddo not have pt_rcu_head member, thus these architectures cannot supportPT_RECLAIM.In preparation for enabling PT_RECLAIM on more architectures, convert__HAVE_ARCH_TLB_REMOVE_TABLE to CONFIG_HAVE_ARCH_TLB_REMOVE_TABLE config,so that we can make conditional judgments in Kconfig.Link: https://lkml.kernel.org/r/5ebfa3d4b56e63c6906bda5eccaa9f7194d3a86b.1769515122.git.zhengqi.arch@bytedance.comSigned-off-by: Qi Zheng Acked-by: David Hildenbrand (Arm) Tested-by: Andreas Larsson [sparc, UP&SMP]Acked-by: Andreas Larsson [sparc]Cc: "Aneesh Kumar K.V" Cc: Anton Ivanov Cc: Borislav Petkov Cc: Dave Hansen Cc: Dev Jain Cc: Helge Deller Cc: "H. Peter Anvin" Cc: Huacai Chen Cc: Ingo Molnar Cc: "James E.J. Bottomley" Cc: Johannes Berg Cc: Lance Yang Cc: "Liam R. Howlett" Cc: Lorenzo Stoakes Cc: Magnus Lindholm Cc: Matt Turner Cc: Michal Hocko Cc: Mike Rapoport Cc: Nicholas Piggin Cc: Peter Zijlstra Cc: Richard Henderson Cc: Richard Weinberger Cc: Suren Baghdasaryan Cc: Thomas Bogendoerfer Cc: Thomas Gleixner Cc: Vlastimil Babka Cc: WANG Xuerui Cc: Wei Yang Cc: Will Deacon Signed-off-by: Andrew Morton List of files: /linux/arch/powerpc/Kconfig

641d47d4c9635987f2329054b1395421716d3fee - powerpc/mm: support page table check

Thu, 18 Dec 2025 18:09:44 +0100

powerpc/mm: support page table checkOn creation and clearing of a page table mapping, instrument such calls byinvoking page_table_check_pte_set and page_table_check_pte_clearrespectively. These calls serve as a sanity check against illegalmappings.Enable ARCH_SUPPORTS_PAGE_TABLE_CHECK on powerpc, except when HUGETLB_PAGEis enabled (powerpc has some weirdness in how it implementsset_huge_pte_at(), which may require some further work).See also:riscv support in commit 3fee229a8eb9 ("riscv/mm: enableARCH_SUPPORTS_PAGE_TABLE_CHECK")arm64 in commit 42b2547137f5 ("arm64/mm: enableARCH_SUPPORTS_PAGE_TABLE_CHECK")x86_64 in commit d283d422c6c4 ("x86: mm: add x86_64 support for page tablecheck")[ajd@linux.ibm.com: rebase, add additional instrumentation, misc fixes]Link: https://lkml.kernel.org/r/20251219-pgtable_check_v18rebase-v18-12-755bc151a50b@linux.ibm.comSigned-off-by: Rohan McLure Signed-off-by: Andrew Donnellan Reviewed-by: Christophe Leroy Reviewed-by: Pasha Tatashin Acked-by: Madhavan Srinivasan Cc: Alexander Gordeev Cc: Alexandre Ghiti Cc: Alexandre Ghiti Cc: Alistair Popple Cc: "Christophe Leroy (CS GROUP)" Cc: David Hildenbrand Cc: Donet Tom Cc: Guo Weikang Cc: Ingo Molnar Cc: Jason Gunthorpe Cc: Kevin Brodsky Cc: Magnus Lindholm Cc: "Matthew Wilcox (Oracle)" Cc: Michael Ellerman Cc: Nicholas Miehlbradt Cc: Nicholas Piggin Cc: Paul Mackerras Cc: Qi Zheng Cc: "Ritesh Harjani (IBM)" Cc: Sweet Tea Dorminy Cc: Thomas Huth Cc: "Vishal Moola (Oracle)" Cc: Zi Yan Signed-off-by: Andrew Morton List of files: /linux/arch/powerpc/Kconfig

370d841929c3b863b7409047e8c84eabc4d0960f - powerpc/32: Automatically adapt TASK_SIZE based on constraints

Wed, 24 Dec 2025 12:20:54 +0100

powerpc/32: Automatically adapt TASK_SIZE based on constraintsAt the time being, TASK_SIZE can be customized by the user via Kconfigbut it is not possible to check all constraints in Kconfig. Impossiblesetups are detected at compile time with BUILD_BUG() but that leadsto build failure when setting crazy values. It is not a problem on itsown because the user will usually either use the default value or seta well thought value. However build robots generate crazy randomconfigs that lead to build failures, and build robots see it as aregression every time a patch adds such a constraint.So instead of failing the build when the custom TASK_SIZE is toobig, just adjust it to the maximum possible value matching the setup.Several architectures already calculate TASK_SIZE based on otherparameters and options.In order to do so, move MODULES_VADDR calculation into task_size_32.hand ensure that:- On book3s/32, userspace and module area have their own segments (256M)- On 8xx, userspace has its own full PGDIR entries (4M)Then TASK_SIZE is guaranteed to be correct so remove relatedBUILD_BUG()s.Signed-off-by: Christophe Leroy Signed-off-by: Madhavan Srinivasan Link: https://patch.msgid.link/6a2575420770d075cd090b5a316730a2ffafdee4.1766574657.git.chleroy@kernel.org List of files: /linux/arch/powerpc/Kconfig

39231e8d6ba7f794b566fd91ebd88c0834a23b98 - mm: fix MAX_FOLIO_ORDER on powerpc configs with hugetlb

Fri, 14 Nov 2025 22:49:20 +0100

mm: fix MAX_FOLIO_ORDER on powerpc configs with hugetlbIn the past, CONFIG_ARCH_HAS_GIGANTIC_PAGE indicated that we supportruntime allocation of gigantic hugetlb folios. In the meantime it evolvedinto a generic way for the architecture to state that it supports gigantichugetlb folios.In commit fae7d834c43c ("mm: add __dump_folio()") we started usingCONFIG_ARCH_HAS_GIGANTIC_PAGE to decide MAX_FOLIO_ORDER: whether we couldhave folios larger than what the buddy can handle. In the context of thatcommit, we started using MAX_FOLIO_ORDER to detect page corruptions whendumping tail pages of folios. Before that commit, we assumed that wecannot have folios larger than the highest buddy order, which wasobviously wrong.In commit 7b4f21f5e038 ("mm/hugetlb: check for unreasonable folio sizeswhen registering hstate"), we used MAX_FOLIO_ORDER to detectinconsistencies, and in fact, we found some now.Powerpc allows for configs that can allocate gigantic folio during boot(not at runtime), that do not set CONFIG_ARCH_HAS_GIGANTIC_PAGE and canexceed PUD_ORDER.To fix it, let's make powerpc select CONFIG_ARCH_HAS_GIGANTIC_PAGE withhugetlb on powerpc, and increase the maximum folio size with hugetlb to 16GiB on 64bit (possible on arm64 and powerpc) and 1 GiB on 32 bit(powerpc). Note that on some powerpc configurations, whether we actuallyhave gigantic pages depends on the setting of CONFIG_ARCH_FORCE_MAX_ORDER,but there is nothing really problematic about setting it unconditionally:we just try to keep the value small so we can better detect problems in__dump_folio() and inconsistencies around the expected largest folio inthe system.Ideally, we'd have a better way to obtain the maximum hugetlb folio sizeand detect ourselves whether we really end up with gigantic folios. Let'sdefer bigger changes and fix the warnings first.While at it, handle gigantic DAX folios more clearly: DAX can only end upcreating gigantic folios with HAVE_ARCH_TRANSPARENT_HUGEPAGE_PUD.Add a new Kconfig option HAVE_GIGANTIC_FOLIOS to make both cases clearer. In particular, worry about ARCH_HAS_GIGANTIC_PAGE only with HUGETLB_PAGE.Note: with enabling CONFIG_ARCH_HAS_GIGANTIC_PAGE on powerpc, we will nowalso allow for runtime allocations of folios in some more powerpc configs.I don't think this is a problem, but if it is we could handle it through__HAVE_ARCH_GIGANTIC_PAGE_RUNTIME_SUPPORTED.While __dump_page()/__dump_folio was also problematic (not handlingdumping of tail pages of such gigantic folios correctly), it doesn't seemcritical enough to mark it as a fix.Link: https://lkml.kernel.org/r/20251114214920.2550676-1-david@kernel.orgFixes: 7b4f21f5e038 ("mm/hugetlb: check for unreasonable folio sizes when registering hstate")Reported-by: Christophe Leroy Closes: https://lore.kernel.org/r/3e043453-3f27-48ad-b987-cc39f523060a@csgroup.eu/Reported-by: Sourabh Jain Closes: https://lore.kernel.org/r/94377f5c-d4f0-4c0f-b0f6-5bf1cd7305b1@linux.ibm.com/Signed-off-by: David Hildenbrand (Red Hat) Cc: Ritesh Harjani (IBM) Cc: Madhavan Srinivasan Cc: Donet Tom Cc: Michael Ellerman Cc: Nicholas Piggin Cc: Christophe Leroy Cc: Lorenzo Stoakes Cc: "Liam R. Howlett" Cc: Vlastimil Babka Cc: Mike Rapoport Cc: Suren Baghdasaryan Cc: Michal Hocko Cc: Nathan Chancellor Signed-off-by: Andrew Morton List of files: /linux/arch/powerpc/Kconfig

8804d970fab45726b3c7cd7f240b31122aa94219 - Merge tag 'mm-stable-2025-10-01-19-00' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

Fri, 03 Oct 2025 03:18:33 +0200

Merge tag 'mm-stable-2025-10-01-19-00' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mmPull MM updates from Andrew Morton: - "mm, swap: improve cluster scan strategy" from Kairui Song improves performance and reduces the failure rate of swap cluster allocation - "support large align and nid in Rust allocators" from Vitaly Wool permits Rust allocators to set NUMA node and large alignment when perforning slub and vmalloc reallocs - "mm/damon/vaddr: support stat-purpose DAMOS" from Yueyang Pan extend DAMOS_STAT's handling of the DAMON operations sets for virtual address spaces for ops-level DAMOS filters - "execute PROCMAP_QUERY ioctl under per-vma lock" from Suren Baghdasaryan reduces mmap_lock contention during reads of /proc/pid/maps - "mm/mincore: minor clean up for swap cache checking" from Kairui Song performs some cleanup in the swap code - "mm: vm_normal_page*() improvements" from David Hildenbrand provides code cleanup in the pagemap code - "add persistent huge zero folio support" from Pankaj Raghav provides a block layer speedup by optionalls making the huge_zero_pagepersistent, instead of releasing it when its refcount falls to zero - "kho: fixes and cleanups" from Mike Rapoport adds a few touchups to the recently added Kexec Handover feature - "mm: make mm->flags a bitmap and 64-bit on all arches" from Lorenzo Stoakes turns mm_struct.flags into a bitmap. To end the constant struggle with space shortage on 32-bit conflicting with 64-bit's needs - "mm/swapfile.c and swap.h cleanup" from Chris Li cleans up some swap code - "selftests/mm: Fix false positives and skip unsupported tests" from Donet Tom fixes a few things in our selftests code - "prctl: extend PR_SET_THP_DISABLE to only provide THPs when advised" from David Hildenbrand "allows individual processes to opt-out of THP=always into THP=madvise, without affecting other workloads on the system". It's a long story - the [1/N] changelog spells out the considerations - "Add and use memdesc_flags_t" from Matthew Wilcox gets us started on the memdesc project. Please see https://kernelnewbies.org/MatthewWilcox/Memdescs and https://blogs.oracle.com/linux/post/introducing-memdesc - "Tiny optimization for large read operations" from Chi Zhiling improves the efficiency of the pagecache read path - "Better split_huge_page_test result check" from Zi Yan improves our folio splitting selftest code - "test that rmap behaves as expected" from Wei Yang adds some rmap selftests - "remove write_cache_pages()" from Christoph Hellwig removes that function and converts its two remaining callers - "selftests/mm: uffd-stress fixes" from Dev Jain fixes some UFFD selftests issues - "introduce kernel file mapped folios" from Boris Burkov introduces the concept of "kernel file pages". Using these permits btrfs to account its metadata pages to the root cgroup, rather than to the cgroups of random inappropriate tasks - "mm/pageblock: improve readability of some pageblock handling" from Wei Yang provides some readability improvements to the page allocator code - "mm/damon: support ARM32 with LPAE" from SeongJae Park teaches DAMON to understand arm32 highmem - "tools: testing: Use existing atomic.h for vma/maple tests" from Brendan Jackman performs some code cleanups and deduplication under tools/testing/ - "maple_tree: Fix testing for 32bit compiles" from Liam Howlett fixes a couple of 32-bit issues in tools/testing/radix-tree.c - "kasan: unify kasan_enabled() and remove arch-specific implementations" from Sabyrzhan Tasbolatov moves KASAN arch-specific initialization code into a common arch-neutral implementation - "mm: remove zpool" from Johannes Weiner removes zspool - an indirection layer which now only redirects to a single thing (zsmalloc) - "mm: task_stack: Stack handling cleanups" from Pasha Tatashin makes a couple of cleanups in the fork code - "mm: remove nth_page()" from David Hildenbrand makes rather a lot of adjustments at various nth_page() callsites, eventually permitting the removal of that undesirable helper function - "introduce kasan.write_only option in hw-tags" from Yeoreum Yun creates a KASAN read-only mode for ARM, using that architecture's memory tagging feature. It is felt that a read-only mode KASAN is suitable for use in production systems rather than debug-only - "mm: hugetlb: cleanup hugetlb folio allocation" from Kefeng Wang does some tidying in the hugetlb folio allocation code - "mm: establish const-correctness for pointer parameters" from Max Kellermann makes quite a number of the MM API functions more accurate about the constness of their arguments. This was getting in the way of subsystems (in this case CEPH) when they attempt to improving their own const/non-const accuracy - "Cleanup free_pages() misuse" from Vishal Moola fixes a number of code sites which were confused over when to use free_pages() vs __free_pages() - "Add Rust abstraction for Maple Trees" from Alice Ryhl makes the mapletree code accessible to Rust. Required by nouveau and by its forthcoming successor: the new Rust Nova driver - "selftests/mm: split_huge_page_test: split_pte_mapped_thp improvements" from David Hildenbrand adds a fix and some cleanups to the thp selftesting code - "mm, swap: introduce swap table as swap cache (phase I)" from Chris Li and Kairui Song is the first step along the path to implementing "swap tables" - a new approach to swap allocation and state tracking which is expected to yield speed and space improvements. This patchset itself yields a 5-20% performance benefit in some situations - "Some ptdesc cleanups" from Matthew Wilcox utilizes the new memdesc layer to clean up the ptdesc code a little - "Fix va_high_addr_switch.sh test failure" from Chunyu Hu fixes some issues in our 5-level pagetable selftesting code - "Minor fixes for memory allocation profiling" from Suren Baghdasaryan addresses a couple of minor issues in relatively new memory allocation profiling feature - "Small cleanups" from Matthew Wilcox has a few cleanups in preparation for more memdesc work - "mm/damon: add addr_unit for DAMON_LRU_SORT and DAMON_RECLAIM" from Quanmin Yan makes some changes to DAMON in furtherance of supporting arm highmem - "selftests/mm: Add -Wunreachable-code and fix warnings" from Muhammad Anjum adds that compiler check to selftests code and fixes the fallout, by removing dead code - "Improvements to Victim Process Thawing and OOM Reaper Traversal Order" from zhongjinji makes a number of improvements in the OOM killer: mainly thawing a more appropriate group of victim threads so they can release resources - "mm/damon: misc fixups and improvements for 6.18" from SeongJae Park is a bunch of small and unrelated fixups for DAMON - "mm/damon: define and use DAMON initialization check function" from SeongJae Park implement reliability and maintainability improvements to a recently-added bug fix - "mm/damon/stat: expose auto-tuned intervals and non-idle ages" from SeongJae Park provides additional transparency to userspace clients of the DAMON_STAT information - "Expand scope of khugepaged anonymous collapse" from Dev Jain removes some constraints on khubepaged's collapsing of anon VMAs. It also increases the success rate of MADV_COLLAPSE against an anon vma - "mm: do not assume file == vma->vm_file in compat_vma_mmap_prepare()" from Lorenzo Stoakes moves us further towards removal of file_operations.mmap(). This patchset concentrates upon clearing up the treatment of stacked filesystems - "mm: Improve mlock tracking for large folios" from Kiryl Shutsemau provides some fixes and improvements to mlock's tracking of large folios. /proc/meminfo's "Mlocked" field became more accurate - "mm/ksm: Fix incorrect accounting of KSM counters during fork" from Donet Tom fixes several user-visible KSM stats inaccuracies across forks and adds selftest code to verify these counters - "mm_slot: fix the usage of mm_slot_entry" from Wei Yang addresses some potential but presently benign issues in KSM's mm_slot handling* tag 'mm-stable-2025-10-01-19-00' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm: (372 commits) mm: swap: check for stable address space before operating on the VMA mm: convert folio_page() back to a macro mm/khugepaged: use start_addr/addr for improved readability hugetlbfs: skip VMAs without shareable locks in hugetlb_vmdelete_list alloc_tag: fix boot failure due to NULL pointer dereference mm: silence data-race in update_hiwater_rss mm/memory-failure: don't select MEMORY_ISOLATION mm/khugepaged: remove definition of struct khugepaged_mm_slot mm/ksm: get mm_slot by mm_slot_entry() when slot is !NULL hugetlb: increase number of reserving hugepages via cmdline selftests/mm: add fork inheritance test for ksm_merging_pages counter mm/ksm: fix incorrect KSM counter handling in mm_struct during fork drivers/base/node: fix double free in register_one_node() mm: remove PMD alignment constraint in execmem_vmalloc() mm/memory_hotplug: fix typo 'esecially' -> 'especially' mm/rmap: improve mlock tracking for large folios mm/filemap: map entire large folio faultaround mm/fault: try to map the entire file folio in finish_fault() mm/rmap: mlock large folios in try_to_unmap_one() mm/rmap: fix a mlock race condition in folio_referenced_one() ... List of files: /linux/arch/powerpc/Kconfig

4b81e2eb9e4db8f6094c077d0c8b27c264901c1b - Merge tag 'timers-vdso-2025-09-29' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Wed, 01 Oct 2025 01:58:21 +0200

Merge tag 'timers-vdso-2025-09-29' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tipPull VDSO updates from Thomas Gleixner: - Further consolidation of the VDSO infrastructure and the common data store - Simplification of the related Kconfig logic - Improve the VDSO selftest suite* tag 'timers-vdso-2025-09-29' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: selftests: vDSO: Drop vdso_test_clock_getres selftests: vDSO: vdso_test_abi: Add tests for clock_gettime64() selftests: vDSO: vdso_test_abi: Test CPUTIME clocks selftests: vDSO: vdso_test_abi: Use explicit indices for name array selftests: vDSO: vdso_test_abi: Drop clock availability tests selftests: vDSO: vdso_test_abi: Use ksft_finished() selftests: vDSO: vdso_test_abi: Correctly skip whole test with missing vDSO selftests: vDSO: Fix -Wunitialized in powerpc VDSO_CALL() wrapper vdso: Add struct __kernel_old_timeval forward declaration to gettime.h vdso: Gate VDSO_GETRANDOM behind HAVE_GENERIC_VDSO vdso: Drop Kconfig GENERIC_VDSO_TIME_NS vdso: Drop Kconfig GENERIC_VDSO_DATA_STORE vdso: Drop kconfig GENERIC_COMPAT_VDSO vdso: Drop kconfig GENERIC_VDSO_32 riscv: vdso: Untangle Kconfig logic time: Build generic update_vsyscall() only with generic time vDSO vdso/gettimeofday: Remove !CONFIG_TIME_NS stubs vdso: Move ENABLE_COMPAT_VDSO from core to arm64 ARM: VDSO: Remove cntvct_ok global variable vdso/datastore: Gate time data behind CONFIG_GENERIC_GETTIMEOFDAY List of files: /linux/arch/powerpc/Kconfig

6c7340a7a8d2b6ecad1ad108f6daa73ba1dc082f - Merge tag 'sched-core-2025-09-26' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Tue, 30 Sep 2025 19:35:11 +0200

Merge tag 'sched-core-2025-09-26' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tipPull scheduler updates from Ingo Molnar: "Core scheduler changes: - Make migrate_{en,dis}able() inline, to improve performance (Menglong Dong) - Move STDL_INIT() functions out-of-line (Peter Zijlstra) - Unify the SCHED_{SMT,CLUSTER,MC} Kconfig (Peter Zijlstra) Fair scheduling: - Defer throttling to when tasks exit to user-space, to reduce the chance & impact of throttle-preemption with held locks and other resources (Aaron Lu, Valentin Schneider) - Get rid of sched_domains_curr_level hack for tl->cpumask(), as the warning was getting triggered on certain topologies (Peter Zijlstra) Misc cleanups & fixes: - Header cleanups (Menglong Dong) - Fix race in push_dl_task() (Harshit Agarwal)"* tag 'sched-core-2025-09-26' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: sched: Fix some typos in include/linux/preempt.h sched: Make migrate_{en,dis}able() inline rcu: Replace preempt.h with sched.h in include/linux/rcupdate.h arch: Add the macro COMPILE_OFFSETS to all the asm-offsets.c sched/fair: Do not balance task to a throttled cfs_rq sched/fair: Do not special case tasks in throttled hierarchy sched/fair: update_cfs_group() for throttled cfs_rqs sched/fair: Propagate load for throttled cfs_rq sched/fair: Get rid of throttled_lb_pair() sched/fair: Task based throttle time accounting sched/fair: Switch to task based throttle model sched/fair: Implement throttle task work and related helpers sched/fair: Add related data structure for task based throttle sched: Unify the SCHED_{SMT,CLUSTER,MC} Kconfig sched: Move STDL_INIT() functions out-of-line sched/fair: Get rid of sched_domains_curr_level hack for tl->cpumask() sched/deadline: Fix race in push_dl_task() List of files: /linux/arch/powerpc/Kconfig

1e338f4d99e6814ede16bad1db1cc463aad8032c - kasan: introduce ARCH_DEFER_KASAN and unify static key across modes

Sun, 10 Aug 2025 14:57:45 +0200

kasan: introduce ARCH_DEFER_KASAN and unify static key across modesPatch series "kasan: unify kasan_enabled() and remove arch-specificimplementations", v6.This patch series addresses the fragmentation in KASAN initializationacross architectures by introducing a unified approach that eliminatesduplicate static keys and arch-specific kasan_arch_is_ready()implementations.The core issue is that different architectures have inconsistent approachesto KASAN readiness tracking:- PowerPC, LoongArch, and UML arch, each implement own kasan_arch_is_ready()- Only HW_TAGS mode had a unified static key (kasan_flag_enabled)- Generic and SW_TAGS modes relied on arch-specific solutions or always-on behaviorThis patch (of 2):Introduce CONFIG_ARCH_DEFER_KASAN to identify architectures [1] that needto defer KASAN initialization until shadow memory is properly set up, andunify the static key infrastructure across all KASAN modes.[1] PowerPC, UML, LoongArch selects ARCH_DEFER_KASAN.The core issue is that different architectures haveinconsistent approachesto KASAN readiness tracking:- PowerPC, LoongArch, and UML arch, each implement own kasan_arch_is_ready()- Only HW_TAGS mode had a unified static key (kasan_flag_enabled)- Generic and SW_TAGS modes relied on arch-specific solutions or always-on behaviorThis patch addresses the fragmentation in KASAN initialization acrossarchitectures by introducing a unified approach that eliminates duplicatestatic keys and arch-specific kasan_arch_is_ready() implementations.Let's replace kasan_arch_is_ready() with existing kasan_enabled() check,which examines the static key being enabled if arch selectsARCH_DEFER_KASAN or has HW_TAGS mode support. For other arch,kasan_enabled() checks the enablement during compile time.Now KASAN users can use a single kasan_enabled() check everywhere.Link: https://lkml.kernel.org/r/20250810125746.1105476-1-snovitoll@gmail.comLink: https://lkml.kernel.org/r/20250810125746.1105476-2-snovitoll@gmail.comCloses: https://bugzilla.kernel.org/show_bug.cgi?id=217049Signed-off-by: Sabyrzhan Tasbolatov Reviewed-by: Christophe Leroy Reviewed-by: Ritesh Harjani (IBM) #powerpcCc: Alexander Gordeev Cc: Alexander Potapenko Cc: Alexandre Ghiti Cc: Alexandre Ghiti Cc: Andrey Konovalov Cc: Andrey Ryabinin Cc: Baoquan He Cc: David Gow Cc: Dmitriy Vyukov Cc: Heiko Carstens Cc: Huacai Chen Cc: Marco Elver Cc: Qing Zhang Cc: Sabyrzhan Tasbolatov Cc: Vincenzo Frascino Signed-off-by: Andrew Morton List of files: /linux/arch/powerpc/Kconfig

7cec88bfdd33434d62d4d5ba664127fa175b50e7 - powerpc/fprobe: fix updated fprobe for function-graph tracer

Tue, 16 Sep 2025 06:40:35 +0200

powerpc/fprobe: fix updated fprobe for function-graph tracerSince commit 4346ba160409 ("fprobe: Rewrite fprobe on function-graphtracer"), FPROBE depends on HAVE_FUNCTION_GRAPH_FREGS. With previouspatch adding HAVE_FUNCTION_GRAPH_FREGS for powerpc, FPROBE can beenabled on powerpc. But with the commit b5fa903b7f7c ("fprobe: Addfprobe_header encoding feature"), asm/fprobe.h header is needed todefine arch dependent encode/decode macros. The fprobe header MSBpattern on powerpc is not 0xf. So, define FPROBE_HEADER_MSB_PATTERNexpected on powerpc.Also, commit 762abbc0d09f ("fprobe: Use ftrace_regs in fprobe exithandler") introduced HAVE_FTRACE_REGS_HAVING_PT_REGS for archs thathave pt_regs in ftrace_regs. Advertise that on powerpc to reusecommon definitions like ftrace_partial_regs().Acked-by: Masami Hiramatsu (Google) Tested-by: Venkat Rao Bagalkote Signed-off-by: Hari Bathini Signed-off-by: Aditya Bodkhe Signed-off-by: Madhavan Srinivasan Link: https://patch.msgid.link/20250916044035.29033-2-adityab1@linux.ibm.com List of files: /linux/arch/powerpc/Kconfig

d733f18a6da6fb719450d5122162556d785ed580 - powerpc/ftrace: support CONFIG_FUNCTION_GRAPH_RETVAL

Tue, 16 Sep 2025 06:40:34 +0200

powerpc/ftrace: support CONFIG_FUNCTION_GRAPH_RETVALcommit a1be9ccc57f0 ("function_graph: Support recording and printing thereturn value of function") introduced support for function graph returnvalue tracing.Additionally, commit a3ed4157b7d8 ("fgraph: Replace fgraph_ret_regs withftrace_regs") further refactored and optimized the implementation,making `struct fgraph_ret_regs` unnecessary.This patch enables the above modifications for powerpc all, ensuring thatfunction graph return value tracing is available on this architecture.In this patch we have redefined two functions:- 'ftrace_regs_get_return_value()' - the existing implementation onppc returns -ve of return value based on some conditions notrelevant to our patch.- 'ftrace_regs_get_frame_pointer()' - always returns 0 in current code .We also allocate stack space to equivalent of 'SWITCH_FRAME_SIZE',allowing us to directly use predefined offsets like 'GPR3' and 'GPR4'this keeps code clean and consistent with already defined offsets .After this patch, v6.14+ kernel can also be built with FPROBE on powerpcbut there are a few other build and runtime dependencies for FPROBE towork properly. The next patch addresses them.Tested-by: Venkat Rao Bagalkote Reviewed-by: Christophe Leroy Signed-off-by: Aditya Bodkhe Signed-off-by: Madhavan Srinivasan Link: https://patch.msgid.link/20250916044035.29033-1-adityab1@linux.ibm.com List of files: /linux/arch/powerpc/Kconfig

a41de5ccff85a0fe45ea1b4078230bf53faa7dc4 - arch/powerpc: Remove support for older GCC and binutils

Tue, 01 Jul 2025 12:50:07 +0200

arch/powerpc: Remove support for older GCC and binutilsCommit 118c40b7b503 ("kbuild: require gcc-8 and binutils-2.30") raisedminimum GCC_VERSION and LD_VERSION.Simplify powerpc build accordingly.Signed-off-by: Christophe Leroy Signed-off-by: Madhavan Srinivasan Link: https://patch.msgid.link/b6b94cba7492c8581e8d5d25b15962e5ad7a37c2.1751366979.git.christophe.leroy@csgroup.eu List of files: /linux/arch/powerpc/Kconfig

bad53ae2dc4296acb8cbcee385e0238cea484100 - vdso: Drop Kconfig GENERIC_VDSO_TIME_NS

Tue, 26 Aug 2025 08:17:13 +0200

vdso: Drop Kconfig GENERIC_VDSO_TIME_NSAll architectures implementing time-related functionality in the vDSO areusing the generic vDSO library which handles time namespaces properly.Remove the now unnecessary Kconfig symbol.Enables the use of time namespaces on architectures, which use thegeneric vDSO but did not enable GENERIC_VDSO_TIME_NS, namely MIPS and arm.Signed-off-by: Thomas Weißschuh Signed-off-by: Thomas Gleixner Acked-by: Catalin Marinas Link: https://lore.kernel.org/all/20250826-vdso-cleanups-v1-10-d9b65750e49f@linutronix.de List of files: /linux/arch/powerpc/Kconfig