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2 daysMerge tag 'timers-vdso-2026-02-09' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull VDSO updates from Thomas Gleixner: - Provide the missing 64-bit variant of clock_getres() This allows the extension of CONFIG_COMPAT_32BIT_TIME to the vDSO and finally the removal of 32-bit time types from the kernel and UAPI. - Remove the useless and broken getcpu_cache from the VDSO The intention was to provide a trivial way to retrieve the CPU number from the VDSO, but as the VDSO data is per process there is no way to make it work. - Switch get/put_unaligned() from packed struct to memcpy() The packed struct violates strict aliasing rules which requires to pass -fno-strict-aliasing to the compiler. As this are scalar values __builtin_memcpy() turns them into simple loads and stores - Use __typeof_unqual__() for __unqual_scalar_typeof() The get/put_unaligned() changes triggered a new sparse warning when __beNN types are used with get/put_unaligned() as sparse builds add a special 'bitwise' attribute to them which prevents sparse to evaluate the Generic in __unqual_scalar_typeof(). Newer sparse versions support __typeof_unqual__() which avoids the problem, but requires a recent sparse install. So this adds a sanity check to sparse builds, which validates that sparse is available and capable of handling it. - Force inline __cvdso_clock_getres_common() Compilers sometimes un-inline agressively, which results in function call overhead and problems with automatic stack variable initialization. Interestingly enough the force inlining results in smaller code than the un-inlined variant produced by GCC when optimizing for size. * tag 'timers-vdso-2026-02-09' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: vdso/gettimeofday: Force inlining of __cvdso_clock_getres_common() x86/percpu: Make CONFIG_USE_X86_SEG_SUPPORT work with sparse compiler: Use __typeof_unqual__() for __unqual_scalar_typeof() powerpc/vdso: Provide clock_getres_time64() tools headers: Remove unneeded ignoring of warnings in unaligned.h tools headers: Update the linux/unaligned.h copy with the kernel sources vdso: Switch get/put_unaligned() from packed struct to memcpy() parisc: Inline a type punning version of get_unaligned_le32() vdso: Remove struct getcpu_cache MIPS: vdso: Provide getres_time64() for 32-bit ABIs arm64: vdso32: Provide clock_getres_time64() ARM: VDSO: Provide clock_getres_time64() ARM: VDSO: Patch out __vdso_clock_getres() if unavailable x86/vdso: Provide clock_getres_time64() for x86-32 selftests: vDSO: vdso_test_abi: Add test for clock_getres_time64() selftests: vDSO: vdso_test_abi: Use UAPI system call numbers selftests: vDSO: vdso_config: Add configurations for clock_getres_time64() vdso: Add prototype for __vdso_clock_getres_time64()
2 daysMerge tag 'locking-core-2026-02-08' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull locking updates from Ingo Molnar: "Lock debugging: - Implement compiler-driven static analysis locking context checking, using the upcoming Clang 22 compiler's context analysis features (Marco Elver) We removed Sparse context analysis support, because prior to removal even a defconfig kernel produced 1,700+ context tracking Sparse warnings, the overwhelming majority of which are false positives. On an allmodconfig kernel the number of false positive context tracking Sparse warnings grows to over 5,200... On the plus side of the balance actual locking bugs found by Sparse context analysis is also rather ... sparse: I found only 3 such commits in the last 3 years. So the rate of false positives and the maintenance overhead is rather high and there appears to be no active policy in place to achieve a zero-warnings baseline to move the annotations & fixers to developers who introduce new code. Clang context analysis is more complete and more aggressive in trying to find bugs, at least in principle. Plus it has a different model to enabling it: it's enabled subsystem by subsystem, which results in zero warnings on all relevant kernel builds (as far as our testing managed to cover it). Which allowed us to enable it by default, similar to other compiler warnings, with the expectation that there are no warnings going forward. This enforces a zero-warnings baseline on clang-22+ builds (Which are still limited in distribution, admittedly) Hopefully the Clang approach can lead to a more maintainable zero-warnings status quo and policy, with more and more subsystems and drivers enabling the feature. Context tracking can be enabled for all kernel code via WARN_CONTEXT_ANALYSIS_ALL=y (default disabled), but this will generate a lot of false positives. ( Having said that, Sparse support could still be added back, if anyone is interested - the removal patch is still relatively straightforward to revert at this stage. ) Rust integration updates: (Alice Ryhl, Fujita Tomonori, Boqun Feng) - Add support for Atomic<i8/i16/bool> and replace most Rust native AtomicBool usages with Atomic<bool> - Clean up LockClassKey and improve its documentation - Add missing Send and Sync trait implementation for SetOnce - Make ARef Unpin as it is supposed to be - Add __rust_helper to a few Rust helpers as a preparation for helper LTO - Inline various lock related functions to avoid additional function calls WW mutexes: - Extend ww_mutex tests and other test-ww_mutex updates (John Stultz) Misc fixes and cleanups: - rcu: Mark lockdep_assert_rcu_helper() __always_inline (Arnd Bergmann) - locking/local_lock: Include more missing headers (Peter Zijlstra) - seqlock: fix scoped_seqlock_read kernel-doc (Randy Dunlap) - rust: sync: Replace `kernel::c_str!` with C-Strings (Tamir Duberstein)" * tag 'locking-core-2026-02-08' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (90 commits) locking/rwlock: Fix write_trylock_irqsave() with CONFIG_INLINE_WRITE_TRYLOCK rcu: Mark lockdep_assert_rcu_helper() __always_inline compiler-context-analysis: Remove __assume_ctx_lock from initializers tomoyo: Use scoped init guard crypto: Use scoped init guard kcov: Use scoped init guard compiler-context-analysis: Introduce scoped init guards cleanup: Make __DEFINE_LOCK_GUARD handle commas in initializers seqlock: fix scoped_seqlock_read kernel-doc tools: Update context analysis macros in compiler_types.h rust: sync: Replace `kernel::c_str!` with C-Strings rust: sync: Inline various lock related methods rust: helpers: Move #define __rust_helper out of atomic.c rust: wait: Add __rust_helper to helpers rust: time: Add __rust_helper to helpers rust: task: Add __rust_helper to helpers rust: sync: Add __rust_helper to helpers rust: refcount: Add __rust_helper to helpers rust: rcu: Add __rust_helper to helpers rust: processor: Add __rust_helper to helpers ...
2 daysMerge tag 'perf-core-2026-02-09' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull performance event updates from Ingo Molnar: "x86 PMU driver updates: - Add support for the core PMU for Intel Diamond Rapids (DMR) CPUs (Dapeng Mi) Compared to previous iterations of the Intel PMU code, there's been a lot of changes, which center around three main areas: - Introduce the OFF-MODULE RESPONSE (OMR) facility to replace the Off-Core Response (OCR) facility - New PEBS data source encoding layout - Support the new "RDPMC user disable" feature - Likewise, a large series adds uncore PMU support for Intel Diamond Rapids (DMR) CPUs (Zide Chen) This centers around these four main areas: - DMR may have two Integrated I/O and Memory Hub (IMH) dies, separate from the compute tile (CBB) dies. Each CBB and each IMH die has its own discovery domain. - Unlike prior CPUs that retrieve the global discovery table portal exclusively via PCI or MSR, DMR uses PCI for IMH PMON discovery and MSR for CBB PMON discovery. - DMR introduces several new PMON types: SCA, HAMVF, D2D_ULA, UBR, PCIE4, CRS, CPC, ITC, OTC, CMS, and PCIE6. - IIO free-running counters in DMR are MMIO-based, unlike SPR. - Also add support for Add missing PMON units for Intel Panther Lake, and support Nova Lake (NVL), which largely maps to Panther Lake. (Zide Chen) - KVM integration: Add support for mediated vPMUs (by Kan Liang and Sean Christopherson, with fixes and cleanups by Peter Zijlstra, Sandipan Das and Mingwei Zhang) - Add Intel cstate driver to support for Wildcat Lake (WCL) CPUs, which are a low-power variant of Panther Lake (Zide Chen) - Add core, cstate and MSR PMU support for the Airmont NP Intel CPU (aka MaxLinear Lightning Mountain), which maps to the existing Airmont code (Martin Schiller) Performance enhancements: - Speed up kexec shutdown by avoiding unnecessary cross CPU calls (Jan H. Schönherr) - Fix slow perf_event_task_exit() with LBR callstacks (Namhyung Kim) User-space stack unwinding support: - Various cleanups and refactorings in preparation to generalize the unwinding code for other architectures (Jens Remus) Uprobes updates: - Transition from kmap_atomic to kmap_local_page (Keke Ming) - Fix incorrect lockdep condition in filter_chain() (Breno Leitao) - Fix XOL allocation failure for 32-bit tasks (Oleg Nesterov) Misc fixes and cleanups: - s390: Remove kvm_types.h from Kbuild (Randy Dunlap) - x86/intel/uncore: Convert comma to semicolon (Chen Ni) - x86/uncore: Clean up const mismatch (Greg Kroah-Hartman) - x86/ibs: Fix typo in dc_l2tlb_miss comment (Xiang-Bin Shi)" * tag 'perf-core-2026-02-09' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (58 commits) s390: remove kvm_types.h from Kbuild uprobes: Fix incorrect lockdep condition in filter_chain() x86/ibs: Fix typo in dc_l2tlb_miss comment x86/uprobes: Fix XOL allocation failure for 32-bit tasks perf/x86/intel/uncore: Convert comma to semicolon perf/x86/intel: Add support for rdpmc user disable feature perf/x86: Use macros to replace magic numbers in attr_rdpmc perf/x86/intel: Add core PMU support for Novalake perf/x86/intel: Add support for PEBS memory auxiliary info field in NVL perf/x86/intel: Add core PMU support for DMR perf/x86/intel: Add support for PEBS memory auxiliary info field in DMR perf/x86/intel: Support the 4 new OMR MSRs introduced in DMR and NVL perf/core: Fix slow perf_event_task_exit() with LBR callstacks perf/core: Speed up kexec shutdown by avoiding unnecessary cross CPU calls uprobes: use kmap_local_page() for temporary page mappings arm/uprobes: use kmap_local_page() in arch_uprobe_copy_ixol() mips/uprobes: use kmap_local_page() in arch_uprobe_copy_ixol() arm64/uprobes: use kmap_local_page() in arch_uprobe_copy_ixol() riscv/uprobes: use kmap_local_page() in arch_uprobe_copy_ixol() perf/x86/intel/uncore: Add Nova Lake support ...
2 daysMerge tag 'bpf-next-7.0' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next Pull bpf updates from Alexei Starovoitov: - Support associating BPF program with struct_ops (Amery Hung) - Switch BPF local storage to rqspinlock and remove recursion detection counters which were causing false positives (Amery Hung) - Fix live registers marking for indirect jumps (Anton Protopopov) - Introduce execution context detection BPF helpers (Changwoo Min) - Improve verifier precision for 32bit sign extension pattern (Cupertino Miranda) - Optimize BTF type lookup by sorting vmlinux BTF and doing binary search (Donglin Peng) - Allow states pruning for misc/invalid slots in iterator loops (Eduard Zingerman) - In preparation for ASAN support in BPF arenas teach libbpf to move global BPF variables to the end of the region and enable arena kfuncs while holding locks (Emil Tsalapatis) - Introduce support for implicit arguments in kfuncs and migrate a number of them to new API. This is a prerequisite for cgroup sub-schedulers in sched-ext (Ihor Solodrai) - Fix incorrect copied_seq calculation in sockmap (Jiayuan Chen) - Fix ORC stack unwind from kprobe_multi (Jiri Olsa) - Speed up fentry attach by using single ftrace direct ops in BPF trampolines (Jiri Olsa) - Require frozen map for calculating map hash (KP Singh) - Fix lock entry creation in TAS fallback in rqspinlock (Kumar Kartikeya Dwivedi) - Allow user space to select cpu in lookup/update operations on per-cpu array and hash maps (Leon Hwang) - Make kfuncs return trusted pointers by default (Matt Bobrowski) - Introduce "fsession" support where single BPF program is executed upon entry and exit from traced kernel function (Menglong Dong) - Allow bpf_timer and bpf_wq use in all programs types (Mykyta Yatsenko, Andrii Nakryiko, Kumar Kartikeya Dwivedi, Alexei Starovoitov) - Make KF_TRUSTED_ARGS the default for all kfuncs and clean up their definition across the tree (Puranjay Mohan) - Allow BPF arena calls from non-sleepable context (Puranjay Mohan) - Improve register id comparison logic in the verifier and extend linked registers with negative offsets (Puranjay Mohan) - In preparation for BPF-OOM introduce kfuncs to access memcg events (Roman Gushchin) - Use CFI compatible destructor kfunc type (Sami Tolvanen) - Add bitwise tracking for BPF_END in the verifier (Tianci Cao) - Add range tracking for BPF_DIV and BPF_MOD in the verifier (Yazhou Tang) - Make BPF selftests work with 64k page size (Yonghong Song) * tag 'bpf-next-7.0' of git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next: (268 commits) selftests/bpf: Fix outdated test on storage->smap selftests/bpf: Choose another percpu variable in bpf for btf_dump test selftests/bpf: Remove test_task_storage_map_stress_lookup selftests/bpf: Update task_local_storage/task_storage_nodeadlock test selftests/bpf: Update task_local_storage/recursion test selftests/bpf: Update sk_storage_omem_uncharge test bpf: Switch to bpf_selem_unlink_nofail in bpf_local_storage_{map_free, destroy} bpf: Support lockless unlink when freeing map or local storage bpf: Prepare for bpf_selem_unlink_nofail() bpf: Remove unused percpu counter from bpf_local_storage_map_free bpf: Remove cgroup local storage percpu counter bpf: Remove task local storage percpu counter bpf: Change local_storage->lock and b->lock to rqspinlock bpf: Convert bpf_selem_unlink to failable bpf: Convert bpf_selem_link_map to failable bpf: Convert bpf_selem_unlink_map to failable bpf: Select bpf_local_storage_map_bucket based on bpf_local_storage selftests/xsk: fix number of Tx frags in invalid packet selftests/xsk: properly handle batch ending in the middle of a packet bpf: Prevent reentrance into call_rcu_tasks_trace() ...
3 daysMerge tag 'nolibc-20260206-for-7.0-1' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/nolibc/linux-nolibc Pull nolibc updates from Thomas Weißschuh: - All time-related functionality uses 64-bit timestamps for y2038 compatibility - fread() and fskeek() support - ptrace() support - Addition of libc-test to the regular kselftests - Smaller cleanups and fixes to the code and build system * tag 'nolibc-20260206-for-7.0-1' of git://git.kernel.org/pub/scm/linux/kernel/git/nolibc/linux-nolibc: (25 commits) tools/nolibc: Add a simple test for writing to a FILE and reading it back tools/nolibc: Add fseek() to stdio.h tools/nolibc: Add fread() to stdio.h selftests/nolibc: also test libc-test through regular selftest framework selftests/nolibc: scope custom flags to the nolibc-test target selftests/nolibc: try to read from stdin in readv_zero test selftests/nolibc: always build sparc32 tests with -mcpu=v8 tools/nolibc: align sys_vfork() with sys_fork() selftests/nolibc: drop NOLIBC_SYSROOT=0 logic selftests/nolibc: add static assertions around time types handling tools/nolibc: add __nolibc_static_assert() tools/nolibc: add compiler version detection macros tools/nolibc: remove time conversions selftests/nolibc: test compatibility of nolibc and kernel time types tools/nolibc: always use 64-bit time types tools/nolibc: use custom structs timespec and timeval tools/nolibc/select: avoid libgcc 64-bit multiplications tools/nolibc/gettimeofday: avoid libgcc 64-bit divisions tools/nolibc: prefer explicit 64-bit time-related system calls tools/nolibc/time: drop invocation of gettimeofday system call ...
3 daysMerge tag 'vfs-7.0-rc1.fserror' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs Pull vfs error reporting updates from Christian Brauner: "This contains the changes to support generic I/O error reporting. Filesystems currently have no standard mechanism for reporting metadata corruption and file I/O errors to userspace via fsnotify. Each filesystem (xfs, ext4, erofs, f2fs, etc.) privately defines EFSCORRUPTED, and error reporting to fanotify is inconsistent or absent entirely. This introduces a generic fserror infrastructure built around struct super_block that gives filesystems a standard way to queue metadata and file I/O error reports for delivery to fsnotify. Errors are queued via mempools and queue_work to avoid holding filesystem locks in the notification path; unmount waits for pending events to drain. A new super_operations::report_error callback lets filesystem drivers respond to file I/O errors themselves (to be used by an upcoming XFS self-healing patchset). On the uapi side, EFSCORRUPTED and EUCLEAN are promoted from private per-filesystem definitions to canonical errno.h values across all architectures" * tag 'vfs-7.0-rc1.fserror' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs: ext4: convert to new fserror helpers xfs: translate fsdax media errors into file "data lost" errors when convenient xfs: report fs metadata errors via fsnotify iomap: report file I/O errors to the VFS fs: report filesystem and file I/O errors to fsnotify uapi: promote EFSCORRUPTED and EUCLEAN to errno.h
2026-01-28tools: Update context analysis macros in compiler_types.hMarco Elver
In sync with the main kernel headers, include a stub version of compiler-context-analysis.h in tools/include/linux/compiler_types.h and remove the sparse context tracking definitions. Since tools/ headers are generally self-contained, provide a standalone tools/include/linux/compiler-context-analysis.h with no-op stubs for now. Also clean up redundant stubs in tools/testing/shared/linux/kernel.h that are now redundant. This fixes build errors in tools/testing/radix-tree/ where headers from include/linux/ (like cleanup.h) are used directly and expect these macros to be defined: | cc -I../shared -I. -I../../include -I../../arch/x86/include -I../../../lib -g -Og -Wall -D_LGPL_SOURCE -fsanitize=address -fsanitize=undefined -c -o radix-tree.o radix-tree.c | In file included from ../shared/linux/cleanup.h:2, | from ../shared/linux/../../../../include/linux/idr.h:18, | from ../shared/linux/idr.h:5, | from radix-tree.c:18: | ../shared/linux/../../../../include/linux/idr.h: In function ‘class_idr_alloc_destructor’: | ../shared/linux/../../../../include/linux/cleanup.h:283:9: error: expected declaration specifiers before ‘__no_context_analysis’ | 283 | __no_context_analysis \ | | ^~~~~~~~~~~~~~~~~~~~~ Closes: https://lore.kernel.org/oe-lkp/202601261546.d7ae2447-lkp@intel.com Reported-by: kernel test robot <oliver.sang@intel.com> Signed-off-by: Marco Elver <elver@google.com> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Reviewed-by: Lorenzo Stoakes <lorenzo.stoakes@oracle.com> Tested-by: Lorenzo Stoakes <lorenzo.stoakes@oracle.com> Link: https://patch.msgid.link/20260127111428.3747328-1-elver@google.com
2026-01-27bpf: add new BPF_CGROUP_ITER_CHILDREN control optionMatt Bobrowski
Currently, the BPF cgroup iterator supports walking descendants in either pre-order (BPF_CGROUP_ITER_DESCENDANTS_PRE) or post-order (BPF_CGROUP_ITER_DESCENDANTS_POST). These modes perform an exhaustive depth-first search (DFS) of the hierarchy. In scenarios where a BPF program may need to inspect only the direct children of a given parent cgroup, a full DFS is unnecessarily expensive. This patch introduces a new BPF cgroup iterator control option, BPF_CGROUP_ITER_CHILDREN. This control option restricts the traversal to the immediate children of a specified parent cgroup, allowing for more targeted and efficient iteration, particularly when exhaustive depth-first search (DFS) traversal is not required. Signed-off-by: Matt Bobrowski <mattbobrowski@google.com> Link: https://lore.kernel.org/r/20260127085112.3608687-1-mattbobrowski@google.com Signed-off-by: Alexei Starovoitov <ast@kernel.org>
2026-01-24bpf: add fsession supportMenglong Dong
The fsession is something that similar to kprobe session. It allow to attach a single BPF program to both the entry and the exit of the target functions. Introduce the struct bpf_fsession_link, which allows to add the link to both the fentry and fexit progs_hlist of the trampoline. Signed-off-by: Menglong Dong <dongml2@chinatelecom.cn> Co-developed-by: Leon Hwang <leon.hwang@linux.dev> Signed-off-by: Leon Hwang <leon.hwang@linux.dev> Link: https://lore.kernel.org/r/20260124062008.8657-2-dongml2@chinatelecom.cn Signed-off-by: Alexei Starovoitov <ast@kernel.org>
2026-01-23Merge tag 'io_uring-6.19-20260122' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/axboe/linux Pull io_uring fixes from Jens Axboe: - Fix for a potential leak of an iovec, if a specific cleanup path is used and the rw_cache is full at the time of the call - Fix for a regression added in this cycle, where waitid should be using prober release/acquire semantics for updating the wait queue head - Check for the cancelation bit being set for every work item processed by io-wq, not just at the start of the loop. Has no real practical implications other than to shut up syzbot doing crazy things that grossly overload a system, hence slowing down ring exit - A few selftest additions, updating the mini_liburing that selftests use * tag 'io_uring-6.19-20260122' of git://git.kernel.org/pub/scm/linux/kernel/git/axboe/linux: selftests/io_uring: support NO_SQARRAY in miniliburing selftests/io_uring: add io_uring_queue_init_params io_uring/io-wq: check IO_WQ_BIT_EXIT inside work run loop io_uring/waitid: fix KCSAN warning on io_waitid->head io_uring/rw: free potentially allocated iovec on cache put failure
2026-01-21selftests/io_uring: support NO_SQARRAY in miniliburingPavel Begunkov
Add support for IORING_SETUP_NO_SQARRAY in miniliburing. Signed-off-by: Pavel Begunkov <asml.silence@gmail.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2026-01-21selftests/io_uring: add io_uring_queue_init_paramsPavel Begunkov
Add a ring init variant taking struct io_uring_params, which mimicks liburing API. Signed-off-by: Pavel Begunkov <asml.silence@gmail.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2026-01-15perf/x86/intel: Add support for PEBS memory auxiliary info field in DMRDapeng Mi
With the introduction of the OMR feature, the PEBS memory auxiliary info field for load and store latency events has been restructured for DMR. The memory auxiliary info field's bit[8] indicates whether a L2 cache miss occurred for a memory load or store instruction. If bit[8] is 0, it signifies no L2 cache miss, and bits[7:0] specify the exact cache data source (up to the L2 cache level). If bit[8] is 1, bits[7:0] represent the OMR encoding, indicating the specific L3 cache or memory region involved in the memory access. A significant enhancement is OMR encoding provides up to 8 fine-grained memory regions besides the cache region. A significant enhancement for OMR encoding is the ability to provide up to 8 fine-grained memory regions in addition to the cache region, offering more detailed insights into memory access regions. For detailed information on the memory auxiliary info encoding, please refer to section 16.2 "PEBS LOAD LATENCY AND STORE LATENCY FACILITY" in the ISE documentation. This patch ensures that the PEBS memory auxiliary info field is correctly interpreted and utilized in DMR. Signed-off-by: Dapeng Mi <dapeng1.mi@linux.intel.com> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Link: https://patch.msgid.link/20260114011750.350569-3-dapeng1.mi@linux.intel.com
2026-01-14Merge git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf after rc5Alexei Starovoitov
Cross-merge BPF and other fixes after downstream PR. No conflicts. Adjacent: Auto-merging MAINTAINERS Auto-merging Makefile Auto-merging kernel/bpf/verifier.c Auto-merging kernel/sched/ext.c Auto-merging mm/memcontrol.c Signed-off-by: Alexei Starovoitov <ast@kernel.org>
2026-01-14tools headers: Remove unneeded ignoring of warnings in unaligned.hIan Rogers
Now that get/put_unaligned() use memcpy() the -Wpacked and -Wattributes warnings don't need disabling anymore. Signed-off-by: Ian Rogers <irogers@google.com> Signed-off-by: Thomas Gleixner <tglx@kernel.org> Link: https://patch.msgid.link/20251016205126.2882625-5-irogers@google.com
2026-01-14tools headers: Update the linux/unaligned.h copy with the kernel sourcesIan Rogers
To pick up the changes in: vdso: Switch get/put_unaligned() from packed struct to memcpy As the code is dependent on __unqual_scalar_typeof, update also the tools version of compiler_types.h to include this. Signed-off-by: Ian Rogers <irogers@google.com> Signed-off-by: Thomas Gleixner <tglx@kernel.org> Link: https://patch.msgid.link/20251016205126.2882625-4-irogers@google.com
2026-01-13uapi: promote EFSCORRUPTED and EUCLEAN to errno.hDarrick J. Wong
Stop definining these privately and instead move them to the uapi errno.h so that they become canonical instead of copy pasta. Cc: linux-api@vger.kernel.org Signed-off-by: Darrick J. Wong <djwong@kernel.org> Link: https://patch.msgid.link/176826402587.3490369.17659117524205214600.stgit@frogsfrogsfrogs Reviewed-by: Gao Xiang <hsiangkao@linux.alibaba.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Jan Kara <jack@suse.cz> Signed-off-by: Christian Brauner <brauner@kernel.org>
2026-01-11treewide: Update email addressThomas Gleixner
In a vain attempt to consolidate the email zoo switch everything to the kernel.org account. Signed-off-by: Thomas Gleixner <tglx@kernel.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2026-01-11tools/nolibc: Add fseek() to stdio.hDaniel Palmer
A very basic wrapper around lseek() that implements fseek(). Signed-off-by: Daniel Palmer <daniel@thingy.jp> Link: https://patch.msgid.link/20260105023629.1502801-3-daniel@thingy.jp Signed-off-by: Thomas Weißschuh <linux@weissschuh.net>
2026-01-11tools/nolibc: Add fread() to stdio.hDaniel Palmer
Add a very basic version of fread() like we already have for fwrite(). Signed-off-by: Daniel Palmer <daniel@thingy.jp> Link: https://patch.msgid.link/20260105023629.1502801-2-daniel@thingy.jp Signed-off-by: Thomas Weißschuh <linux@weissschuh.net>
2026-01-06bpf: Introduce BPF_F_CPU and BPF_F_ALL_CPUS flagsLeon Hwang
Introduce BPF_F_CPU and BPF_F_ALL_CPUS flags and check them for following APIs: * 'map_lookup_elem()' * 'map_update_elem()' * 'generic_map_lookup_batch()' * 'generic_map_update_batch()' And, get the correct value size for these APIs. Acked-by: Andrii Nakryiko <andrii@kernel.org> Signed-off-by: Leon Hwang <leon.hwang@linux.dev> Link: https://lore.kernel.org/r/20260107022022.12843-2-leon.hwang@linux.dev Signed-off-by: Alexei Starovoitov <ast@kernel.org>
2026-01-06tools/nolibc: align sys_vfork() with sys_fork()Thomas Weißschuh
Currently the generic variants of sys_fork() and sys_vfork() differ in both they precedence of used system calls and the usage of sys_clone() vs sys_clone3(). While the interface of clone3() in sys_vfork() is more consistent over different architectures, qemu-user does not support it, making testing harder. We already handle the different clone() interfaces for sys_fork() in the architecture-specific headers, and can do so also for sys_vfork(). In fact SPARC already has such handling and only s390 is currently missing. Signed-off-by: Thomas Weißschuh <linux@weissschuh.net> Acked-by: Willy Tarreau <w@1wt.eu> Link: https://patch.msgid.link/20260104-nolibc-vfork-v1-1-a63464b9e4e6@weissschuh.net
2026-01-06selftests/nolibc: add static assertions around time types handlingThomas Weißschuh
The nolibc system call wrappers expect the libc types to be compatible to the kernel types. Make sure these expectations hold at compile-time. Signed-off-by: Thomas Weißschuh <linux@weissschuh.net> Acked-by: Willy Tarreau <w@1wt.eu> Reviewed-by: Arnd Bergmann <arnd@arndb.de> Link: https://patch.msgid.link/20251220-nolibc-uapi-types-v3-14-c662992f75d7@weissschuh.net
2026-01-06tools/nolibc: add __nolibc_static_assert()Thomas Weißschuh
Add a wrapper for _Static_assert() to use within nolibc. While _Static_assert() itself was only standardized in C11, in GCC and clang dialects it is also available in older standards. Link: https://lore.kernel.org/lkml/20251203192330.GA12995@1wt.eu/ Signed-off-by: Thomas Weißschuh <linux@weissschuh.net> Acked-by: Willy Tarreau <w@1wt.eu> Reviewed-by: Arnd Bergmann <arnd@arndb.de> Link: https://patch.msgid.link/20251220-nolibc-uapi-types-v3-13-c662992f75d7@weissschuh.net
2026-01-06tools/nolibc: add compiler version detection macrosThomas Weißschuh
Some upcoming logic needs to depend on the version of GCC or clang. Add some helper macros to keep the conditionals readable. Signed-off-by: Thomas Weißschuh <linux@weissschuh.net> Acked-by: Willy Tarreau <w@1wt.eu> Reviewed-by: Arnd Bergmann <arnd@arndb.de> Link: https://patch.msgid.link/20251220-nolibc-uapi-types-v3-12-c662992f75d7@weissschuh.net
2026-01-06tools/nolibc: remove time conversionsThomas Weißschuh
Now that 'struct timespec' and 'struct __kernel_timespec' are compatible, the conversions are not necessary anymore. The same holds true for 'struct itimerspec' and 'struct __kernel_itimerspec'. Remove the conversions. Signed-off-by: Thomas Weißschuh <linux@weissschuh.net> Acked-by: Willy Tarreau <w@1wt.eu> Reviewed-by: Arnd Bergmann <arnd@arndb.de> Link: https://patch.msgid.link/20251220-nolibc-uapi-types-v3-11-c662992f75d7@weissschuh.net
2026-01-05compiler-context-analysis: Remove __cond_lock() function-like helperMarco Elver
As discussed in [1], removing __cond_lock() will improve the readability of trylock code. Now that Sparse context tracking support has been removed, we can also remove __cond_lock(). Change existing APIs to either drop __cond_lock() completely, or make use of the __cond_acquires() function attribute instead. In particular, spinlock and rwlock implementations required switching over to inline helpers rather than statement-expressions for their trylock_* variants. Suggested-by: Peter Zijlstra <peterz@infradead.org> Signed-off-by: Marco Elver <elver@google.com> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Link: https://lore.kernel.org/all/20250207082832.GU7145@noisy.programming.kicks-ass.net/ [1] Link: https://patch.msgid.link/20251219154418.3592607-25-elver@google.com
2026-01-04tools/nolibc: always use 64-bit time typesThomas Weißschuh
32-bit time types will stop working in 2038. Switch to 64-bit time types everywhere. Suggested-by: Arnd Bergmann <arnd@arndb.de> Link: https://lore.kernel.org/lkml/cec27d94-c99d-4c57-9a12-275ea663dda8@app.fastmail.com/ Signed-off-by: Thomas Weißschuh <linux@weissschuh.net> Acked-by: Willy Tarreau <w@1wt.eu> Reviewed-by: Arnd Bergmann <arnd@arndb.de> Link: https://patch.msgid.link/20251220-nolibc-uapi-types-v3-9-c662992f75d7@weissschuh.net
2026-01-04tools/nolibc: use custom structs timespec and timevalThomas Weißschuh
A custom 'struct timespec' and 'struct timeval' will be necessary for 64-bit time types on 32-bit architectures. <linux/time.h> will define other time-related types in terms of the custom 'struct timespec'. Add custom struct definitions which for now mirror exactly the ones from the UAPI headers, but provide the foundation for further changes. Signed-off-by: Thomas Weißschuh <linux@weissschuh.net> Acked-by: Willy Tarreau <w@1wt.eu> Reviewed-by: Arnd Bergmann <arnd@arndb.de> Link: https://patch.msgid.link/20251220-nolibc-uapi-types-v3-8-c662992f75d7@weissschuh.net
2026-01-04tools/nolibc/select: avoid libgcc 64-bit multiplicationsThomas Weißschuh
timeval::tv_usec is going to be 64-bit wide even on 32-bit architectures. As not all architectures support 64-bit multiplications instructions, calls to libgcc (__multi3()) may be emitted by the compiler which are not provided by nolibc. As tv_usec and tv_nsec are guaranteed to always fit into an uint32_t, perform a 32-bit multiplication instead. Signed-off-by: Thomas Weißschuh <linux@weissschuh.net> Acked-by: Willy Tarreau <w@1wt.eu> Reviewed-by: Arnd Bergmann <arnd@arndb.de> Link: https://patch.msgid.link/20251220-nolibc-uapi-types-v3-7-c662992f75d7@weissschuh.net
2026-01-04tools/nolibc/gettimeofday: avoid libgcc 64-bit divisionsThomas Weißschuh
timespec::tv_nsec is going to be 64-bit wide even on 32-bit architectures. As not all architectures support 64-bit division instructions, calls to libgcc (__divdi3()) may be emitted by the compiler which are not provided by nolibc. As tv_nsec is guaranteed to always fit into an uint32_t, perform a 32-bit division instead. Signed-off-by: Thomas Weißschuh <linux@weissschuh.net> Reviewed-by: Arnd Bergmann <arnd@arndb.de> Acked-by: Willy Tarreau <w@1wt.eu> Link: https://patch.msgid.link/20251220-nolibc-uapi-types-v3-6-c662992f75d7@weissschuh.net
2026-01-04tools/nolibc: prefer explicit 64-bit time-related system callsThomas Weißschuh
Make sure to always use the 64-bit safe system calls in preparation for 64-bit time_t on 32-bit architectures. Also prevent issues on kernels which disable CONFIG_COMPAT_32BIT_TIME and therefore don't provide the 32-bit system calls anymore. Signed-off-by: Thomas Weißschuh <linux@weissschuh.net> Acked-by: Willy Tarreau <w@1wt.eu> Reviewed-by: Arnd Bergmann <arnd@arndb.de> Link: https://patch.msgid.link/20251220-nolibc-uapi-types-v3-5-c662992f75d7@weissschuh.net
2026-01-04tools/nolibc/time: drop invocation of gettimeofday system callThomas Weißschuh
This invocation uses libc types with a system call. While this works now, upcoming changes to 'struct timeval' would require type conversions. If types are converted anyways, the clock_gettime() based fallback can be used everywhere, simplifying the code. Signed-off-by: Thomas Weißschuh <linux@weissschuh.net> Acked-by: Willy Tarreau <w@1wt.eu> Reviewed-by: Arnd Bergmann <arnd@arndb.de> Link: https://patch.msgid.link/20251220-nolibc-uapi-types-v3-4-c662992f75d7@weissschuh.net
2026-01-04tools/nolibc/select: drop non-pselect based implementationsThomas Weißschuh
These implementations use the libc 'struct timeval' with system calls which can lead to type mismatches. Currently this is fine, but will break with upcoming changes to 'struct timeval'. If the structure needs to be converted anyways, the implementations based on pselect can be used for all architectures. This simplifies the logic. Signed-off-by: Thomas Weißschuh <linux@weissschuh.net> Acked-by: Willy Tarreau <w@1wt.eu> Reviewed-by: Arnd Bergmann <arnd@arndb.de> Link: https://patch.msgid.link/20251220-nolibc-uapi-types-v3-3-c662992f75d7@weissschuh.net
2026-01-04tools/nolibc/poll: drop __NR_poll fallbackThomas Weißschuh
This fallback is never used, remove it. Suggested-by: Arnd Bergmann <arnd@arndb.de> Link: https://lore.kernel.org/lkml/fbca1d3e-12e4-4c4e-8091-87464035fe39@app.fastmail.com/ Signed-off-by: Thomas Weißschuh <linux@weissschuh.net> Acked-by: Willy Tarreau <w@1wt.eu> Reviewed-by: Arnd Bergmann <arnd@arndb.de> Link: https://patch.msgid.link/20251220-nolibc-uapi-types-v3-2-c662992f75d7@weissschuh.net
2026-01-04tools/nolibc/poll: use kernel types for system call invocationsThomas Weißschuh
The system calls expect 'struct __kernel_old_timespec'. While currently 'struct __kernel_old_timespec' and 'struct timespec' are compatible, this is confusing. Especially as future patches will change the definition of 'struct timespec'. Use the correct kernel type instead. Suggested-by: Arnd Bergmann <arnd@arndb.de> Link: https://lore.kernel.org/lkml/fbca1d3e-12e4-4c4e-8091-87464035fe39@app.fastmail.com/ Signed-off-by: Thomas Weißschuh <linux@weissschuh.net> Acked-by: Willy Tarreau <w@1wt.eu> Reviewed-by: Arnd Bergmann <arnd@arndb.de> Link: https://patch.msgid.link/20251220-nolibc-uapi-types-v3-1-c662992f75d7@weissschuh.net
2026-01-04tools/nolibc: always use 64-bit mode for s390 header checksThomas Weißschuh
32-bit s390 support was recently removed from nolibc. If the compiler defaults to 32-bit during the header checks, they fail. Make sure to always use 64-bit mode for s390 heafer checks. Fixes: 169ebcbb9082 ("tools: Remove s390 compat support") Acked-by: Willy Tarreau <w@1wt.eu> Acked-by: Heiko Carstens <hca@linux.ibm.com> Link: https://patch.msgid.link/20251203-nolibc-headers-check-s390-v1-1-5d35e52a83ba@weissschuh.net Signed-off-by: Thomas Weißschuh <linux@weissschuh.net>
2026-01-04tools/nolibc: add ptrace supportBenjamin Berg
Add ptrace support, as it will be useful in UML. Signed-off-by: Benjamin Berg <benjamin.berg@intel.com> [Thomas: drop va_args usage and linux/uio.h inclusion] Signed-off-by: Thomas Weißschuh <linux@weissschuh.net>
2026-01-02Merge tag 'perf-tools-fixes-for-v6.19-2026-01-02' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/perf/perf-tools Pull perf tool fixes and from Namhyung Kim: - skip building BPF skeletons if libopenssl is missing - a couple of test updates - handle error cases of filename__read_build_id() - support NVIDIA Olympus for ARM SPE profiling - update tool headers to sync with the kernel * tag 'perf-tools-fixes-for-v6.19-2026-01-02' of git://git.kernel.org/pub/scm/linux/kernel/git/perf/perf-tools: tools build: Fix the common set of features test wrt libopenssl tools headers: Sync syscall table with kernel sources tools headers: Sync linux/socket.h with kernel sources tools headers: Sync linux/gfp_types.h with kernel sources tools headers: Sync arm64 headers with kernel sources tools headers: Sync x86 headers with kernel sources tools headers: Sync UAPI sound/asound.h with kernel sources tools headers: Sync UAPI linux/mount.h with kernel sources tools headers: Sync UAPI linux/fs.h with kernel sources tools headers: Sync UAPI linux/fcntl.h with kernel sources tools headers: Sync UAPI KVM headers with kernel sources tools headers: Sync UAPI drm/drm.h with kernel sources perf arm-spe: Add NVIDIA Olympus to neoverse list tools headers arm64: Add NVIDIA Olympus part perf tests top: Make the test exclusive perf tests kvm: Avoid leaving perf.data.guest file around perf symbol: Fix ENOENT case for filename__read_build_id perf tools: Disable BPF skeleton if no libopenssl found tools/build: Add a feature test for libopenssl
2025-12-24tools headers: Sync syscall table with kernel sourcesNamhyung Kim
To pick up changes from: b36d4b6aa88ef039 ("arch: hookup listns() system call") This should be used to beautify the syscall arguments and it addresses these tools/perf build warnings: Warning: Kernel ABI header differences: diff -u tools/include/uapi/asm-generic/unistd.h include/uapi/asm-generic/unistd.h diff -u tools/scripts/syscall.tbl scripts/syscall.tbl diff -u tools/perf/arch/x86/entry/syscalls/syscall_32.tbl arch/x86/entry/syscalls/syscall_32.tbl diff -u tools/perf/arch/x86/entry/syscalls/syscall_64.tbl arch/x86/entry/syscalls/syscall_64.tbl diff -u tools/perf/arch/powerpc/entry/syscalls/syscall.tbl arch/powerpc/kernel/syscalls/syscall.tbl diff -u tools/perf/arch/s390/entry/syscalls/syscall.tbl arch/s390/kernel/syscalls/syscall.tbl diff -u tools/perf/arch/mips/entry/syscalls/syscall_n64.tbl arch/mips/kernel/syscalls/syscall_n64.tbl diff -u tools/perf/arch/arm/entry/syscalls/syscall.tbl arch/arm/tools/syscall.tbl diff -u tools/perf/arch/sh/entry/syscalls/syscall.tbl arch/sh/kernel/syscalls/syscall.tbl diff -u tools/perf/arch/sparc/entry/syscalls/syscall.tbl arch/sparc/kernel/syscalls/syscall.tbl diff -u tools/perf/arch/xtensa/entry/syscalls/syscall.tbl arch/xtensa/kernel/syscalls/syscall.tbl Please see tools/include/uapi/README. Note that s390 syscall table is still out of sync as it switches to use the generic table. But I'd like to minimize the change in this commit. Cc: linux-arch@vger.kernel.org Signed-off-by: Namhyung Kim <namhyung@kernel.org>
2025-12-24tools headers: Sync linux/gfp_types.h with kernel sourcesNamhyung Kim
To pick up changes from: 4c0a17e28340e458 ("slab: prevent recursive kmalloc() in alloc_empty_sheaf()") This would be used to handle GFP masks in the perf code and address these tools/perf build warnings: Warning: Kernel ABI header differences: diff -u tools/include/linux/gfp_types.h include/linux/gfp_types.h Please see tools/include/uapi/README. Acked-by: SeongJae Park <sj@kernel.org> Cc: linux-mm@kvack.org Signed-off-by: Namhyung Kim <namhyung@kernel.org>
2025-12-24tools headers: Sync UAPI KVM headers with kernel sourcesNamhyung Kim
To pick up changes from: ad9c62bd8946621e ("KVM: arm64: VM exit to userspace to handle SEA") 8e8678e740ecde2a ("KVM: s390: Add capability that forwards operation exceptions") e0c26d47def7382d ("Merge tag 'kvm-s390-next-6.19-1' of https://git.kernel.org/pub/scm/linux/kernel/git/kvms390/linux into HEAD") 7a61d61396b97fd6 ("KVM: SEV: Publish supported SEV-SNP policy bits") This should be used to beautify DRM syscall arguments and it addresses these tools/perf build warnings: Warning: Kernel ABI header differences: diff -u tools/include/uapi/linux/kvm.h include/uapi/linux/kvm.h diff -u tools/arch/x86/include/uapi/asm/kvm.h arch/x86/include/uapi/asm/kvm.h Please see tools/include/uapi/README. Cc: kvm@vger.kernel.org Signed-off-by: Namhyung Kim <namhyung@kernel.org>
2025-12-24tools headers: Sync UAPI drm/drm.h with kernel sourcesNamhyung Kim
To pick up changes from: 179ab8e7d7b378f1 ("drm/colorop: Introduce DRM_CLIENT_CAP_PLANE_COLOR_PIPELINE") This should be used to beautify DRM syscall arguments and it addresses these tools/perf build warnings: Warning: Kernel ABI header differences: diff -u tools/include/uapi/drm/drm.h include/uapi/drm/drm.h Please see tools/include/uapi/README. Cc: dri-devel@lists.freedesktop.org Signed-off-by: Namhyung Kim <namhyung@kernel.org>
2025-12-23tools include: Add definitions for __aligned_{l,b}e64David Matlack
Add definitions for the missing __aligned_le64 and __aligned_be64 to tools/include/linux/types.h. The former is needed by <linux/iommufd.h> for builds where tools/include/ is on the include path ahead of usr/include/. Signed-off-by: David Matlack <dmatlack@google.com> Link: https://lore.kernel.org/r/20251219233818.1965306-2-dmatlack@google.com Signed-off-by: Alex Williamson <alex@shazbot.org>
2025-12-16Merge git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf after 6.19-rc1Alexei Starovoitov
Cross-merge BPF and other fixes after downstream PR. Signed-off-by: Alexei Starovoitov <ast@kernel.org>
2025-12-09Merge tag 'hyperv-next-signed-20251207' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/hyperv/linux Pull hyperv updates from Wei Liu: - Enhancements to Linux as the root partition for Microsoft Hypervisor: - Support a new mode called L1VH, which allows Linux to drive the hypervisor running the Azure Host directly - Support for MSHV crash dump collection - Allow Linux's memory management subsystem to better manage guest memory regions - Fix issues that prevented a clean shutdown of the whole system on bare metal and nested configurations - ARM64 support for the MSHV driver - Various other bug fixes and cleanups - Add support for Confidential VMBus for Linux guest on Hyper-V - Secure AVIC support for Linux guests on Hyper-V - Add the mshv_vtl driver to allow Linux to run as the secure kernel in a higher virtual trust level for Hyper-V * tag 'hyperv-next-signed-20251207' of git://git.kernel.org/pub/scm/linux/kernel/git/hyperv/linux: (58 commits) mshv: Cleanly shutdown root partition with MSHV mshv: Use reboot notifier to configure sleep state mshv: Add definitions for MSHV sleep state configuration mshv: Add support for movable memory regions mshv: Add refcount and locking to mem regions mshv: Fix huge page handling in memory region traversal mshv: Move region management to mshv_regions.c mshv: Centralize guest memory region destruction mshv: Refactor and rename memory region handling functions mshv: adjust interrupt control structure for ARM64 Drivers: hv: use kmalloc_array() instead of kmalloc() mshv: Add ioctl for self targeted passthrough hvcalls Drivers: hv: Introduce mshv_vtl driver Drivers: hv: Export some symbols for mshv_vtl static_call: allow using STATIC_CALL_TRAMP_STR() from assembly mshv: Extend create partition ioctl to support cpu features mshv: Allow mappings that overlap in uaddr mshv: Fix create memory region overlap check mshv: add WQ_PERCPU to alloc_workqueue users Drivers: hv: Use kmalloc_array() instead of kmalloc() ...
2025-12-07Merge tag 'perf-tools-for-v6.19-2025-12-06' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/perf/perf-tools Pull perf tools updates from Namhyung Kim: "Perf event/metric description: Unify all event and metric descriptions in JSON format. Now event parsing and handling is greatly simplified by that. From users point of view, perf list will provide richer information about hardware events like the following. $ perf list hw List of pre-defined events (to be used in -e or -M): legacy hardware: branch-instructions [Retired branch instructions [This event is an alias of branches]. Unit: cpu] branch-misses [Mispredicted branch instructions. Unit: cpu] branches [Retired branch instructions [This event is an alias of branch-instructions]. Unit: cpu] bus-cycles [Bus cycles,which can be different from total cycles. Unit: cpu] cache-misses [Cache misses. Usually this indicates Last Level Cache misses; this is intended to be used in conjunction with the PERF_COUNT_HW_CACHE_REFERENCES event to calculate cache miss rates. Unit: cpu] cache-references [Cache accesses. Usually this indicates Last Level Cache accesses but this may vary depending on your CPU. This may include prefetches and coherency messages; again this depends on the design of your CPU. Unit: cpu] cpu-cycles [Total cycles. Be wary of what happens during CPU frequency scaling [This event is an alias of cycles]. Unit: cpu] cycles [Total cycles. Be wary of what happens during CPU frequency scaling [This event is an alias of cpu-cycles]. Unit: cpu] instructions [Retired instructions. Be careful,these can be affected by various issues,most notably hardware interrupt counts. Unit: cpu] ref-cycles [Total cycles; not affected by CPU frequency scaling. Unit: cpu] But most notable changes would be in the perf stat. On the right side, the default metrics are better named and aligned. :) $ perf stat -- perf test -w noploop Performance counter stats for 'perf test -w noploop': 11 context-switches # 10.8 cs/sec cs_per_second 0 cpu-migrations # 0.0 migrations/sec migrations_per_second 3,612 page-faults # 3532.5 faults/sec page_faults_per_second 1,022.51 msec task-clock # 1.0 CPUs CPUs_utilized 110,466 branch-misses # 0.0 % branch_miss_rate (88.66%) 6,934,452,104 branches # 6781.8 M/sec branch_frequency (88.66%) 4,657,032,590 cpu-cycles # 4.6 GHz cycles_frequency (88.65%) 27,755,874,218 instructions # 6.0 instructions insn_per_cycle (89.03%) TopdownL1 # 0.3 % tma_backend_bound # 9.3 % tma_bad_speculation (89.05%) # 9.7 % tma_frontend_bound (77.86%) # 80.7 % tma_retiring (88.81%) 1.025318171 seconds time elapsed 1.013248000 seconds user 0.012014000 seconds sys Deferred unwinding support: With the kernel support (commit c69993ecdd4d: "perf: Support deferred user unwind"), perf can use deferred callchains for userspace stack trace with frame pointers like below: $ perf record --call-graph fp,defer ... This will be transparent to users when it comes to other commands like perf report and perf script. They will merge the deferred callchains to the previous samples as if they were collected together. ARM SPE updates - Extensive enhancements to support various kinds of memory operations including GCS, MTE allocation tags, memcpy/memset, register access, and SIMD operations. - Add inverted data source filter (inv_data_src_filter) support to exclude certain data sources. - Improve documentation. Vendor event updates: - Intel: Updated event files for Sierra Forest, Panther Lake, Meteor Lake, Lunar Lake, Granite Rapids, and others. - Arm64: Added metrics for i.MX94 DDR PMU and Cortex-A720AE definitions. - RISC-V: Added JSON support for T-HEAD C920V2. Misc: - Improve pointer tracking in data type profiling. It'd give better output when the variable is using container_of() to convert type. - Annotation support for perf c2c report in TUI. Press 'a' key to enter annotation view from cacheline browser window. This will show which instruction is causing the cacheline contention. - Lots of fixes and test coverage improvements!" * tag 'perf-tools-for-v6.19-2025-12-06' of git://git.kernel.org/pub/scm/linux/kernel/git/perf/perf-tools: (214 commits) libperf: Use 'extern' in LIBPERF_API visibility macro perf stat: Improve handling of termination by signal perf tests stat: Add test for error for an offline CPU perf stat: When no events, don't report an error if there is none perf tests stat: Add "--null" coverage perf cpumap: Add "any" CPU handling to cpu_map__snprint_mask libperf cpumap: Fix perf_cpu_map__max for an empty/NULL map perf stat: Allow no events to open if this is a "--null" run perf test kvm: Add some basic perf kvm test coverage perf tests evlist: Add basic evlist test perf tests script dlfilter: Add a dlfilter test perf tests kallsyms: Add basic kallsyms test perf tests timechart: Add a perf timechart test perf tests top: Add basic perf top coverage test perf tests buildid: Add purge and remove testing perf tests c2c: Add a basic c2c perf c2c: Clean up some defensive gets and make asan clean perf jitdump: Fix missed dso__put perf mem-events: Don't leak online CPU map perf hist: In init, ensure mem_info is put on error paths ...
2025-12-05bpf: Support associating BPF program with struct_opsAmery Hung
Add a new BPF command BPF_PROG_ASSOC_STRUCT_OPS to allow associating a BPF program with a struct_ops map. This command takes a file descriptor of a struct_ops map and a BPF program and set prog->aux->st_ops_assoc to the kdata of the struct_ops map. The command does not accept a struct_ops program nor a non-struct_ops map. Programs of a struct_ops map is automatically associated with the map during map update. If a program is shared between two struct_ops maps, prog->aux->st_ops_assoc will be poisoned to indicate that the associated struct_ops is ambiguous. The pointer, once poisoned, cannot be reset since we have lost track of associated struct_ops. For other program types, the associated struct_ops map, once set, cannot be changed later. This restriction may be lifted in the future if there is a use case. A kernel helper bpf_prog_get_assoc_struct_ops() can be used to retrieve the associated struct_ops pointer. The returned pointer, if not NULL, is guaranteed to be valid and point to a fully updated struct_ops struct. For struct_ops program reused in multiple struct_ops map, the return will be NULL. prog->aux->st_ops_assoc is protected by bumping the refcount for non-struct_ops programs and RCU for struct_ops programs. Since it would be inefficient to track programs associated with a struct_ops map, every non-struct_ops program will bump the refcount of the map to make sure st_ops_assoc stays valid. For a struct_ops program, it is protected by RCU as map_free will wait for an RCU grace period before disassociating the program with the map. The helper must be called in BPF program context or RCU read-side critical section. struct_ops implementers should note that the struct_ops returned may not be initialized nor attached yet. The struct_ops implementer will be responsible for tracking and checking the state of the associated struct_ops map if the use case expects an initialized or attached struct_ops. Signed-off-by: Amery Hung <ameryhung@gmail.com> Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Acked-by: Andrii Nakryiko <andrii@kernel.org> Acked-by: Martin KaFai Lau <martin.lau@kernel.org> Link: https://lore.kernel.org/bpf/20251203233748.668365-3-ameryhung@gmail.com
2025-12-03Merge tag 'net-next-6.19' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next Pull networking updates from Jakub Kicinski: "Core & protocols: - Replace busylock at the Tx queuing layer with a lockless list. Resulting in a 300% (4x) improvement on heavy TX workloads, sending twice the number of packets per second, for half the cpu cycles. - Allow constantly busy flows to migrate to a more suitable CPU/NIC queue. Normally we perform queue re-selection when flow comes out of idle, but under extreme circumstances the flows may be constantly busy. Add sysctl to allow periodic rehashing even if it'd risk packet reordering. - Optimize the NAPI skb cache, make it larger, use it in more paths. - Attempt returning Tx skbs to the originating CPU (like we already did for Rx skbs). - Various data structure layout and prefetch optimizations from Eric. - Remove ktime_get() from the recvmsg() fast path, ktime_get() is sadly quite expensive on recent AMD machines. - Extend threaded NAPI polling to allow the kthread busy poll for packets. - Make MPTCP use Rx backlog processing. This lowers the lock pressure, improving the Rx performance. - Support memcg accounting of MPTCP socket memory. - Allow admin to opt sockets out of global protocol memory accounting (using a sysctl or BPF-based policy). The global limits are a poor fit for modern container workloads, where limits are imposed using cgroups. - Improve heuristics for when to kick off AF_UNIX garbage collection. - Allow users to control TCP SACK compression, and default to 33% of RTT. - Add tcp_rcvbuf_low_rtt sysctl to let datacenter users avoid unnecessarily aggressive rcvbuf growth and overshot when the connection RTT is low. - Preserve skb metadata space across skb_push / skb_pull operations. - Support for IPIP encapsulation in the nftables flowtable offload. - Support appending IP interface information to ICMP messages (RFC 5837). - Support setting max record size in TLS (RFC 8449). - Remove taking rtnl_lock from RTM_GETNEIGHTBL and RTM_SETNEIGHTBL. - Use a dedicated lock (and RCU) in MPLS, instead of rtnl_lock. - Let users configure the number of write buffers in SMC. - Add new struct sockaddr_unsized for sockaddr of unknown length, from Kees. - Some conversions away from the crypto_ahash API, from Eric Biggers. - Some preparations for slimming down struct page. - YAML Netlink protocol spec for WireGuard. - Add a tool on top of YAML Netlink specs/lib for reporting commonly computed derived statistics and summarized system state. Driver API: - Add CAN XL support to the CAN Netlink interface. - Add uAPI for reporting PHY Mean Square Error (MSE) diagnostics, as defined by the OPEN Alliance's "Advanced diagnostic features for 100BASE-T1 automotive Ethernet PHYs" specification. - Add DPLL phase-adjust-gran pin attribute (and implement it in zl3073x). - Refactor xfrm_input lock to reduce contention when NIC offloads IPsec and performs RSS. - Add info to devlink params whether the current setting is the default or a user override. Allow resetting back to default. - Add standard device stats for PSP crypto offload. - Leverage DSA frame broadcast to implement simple HSR frame duplication for a lot of switches without dedicated HSR offload. - Add uAPI defines for 1.6Tbps link modes. Device drivers: - Add Motorcomm YT921x gigabit Ethernet switch support. - Add MUCSE driver for N500/N210 1GbE NIC series. - Convert drivers to support dedicated ops for timestamping control, and away from the direct IOCTL handling. While at it support GET operations for PHY timestamping. - Add (and convert most drivers to) a dedicated ethtool callback for reading the Rx ring count. - Significant refactoring efforts in the STMMAC driver, which supports Synopsys turn-key MAC IP integrated into a ton of SoCs. - Ethernet high-speed NICs: - Broadcom (bnxt): - support PPS in/out on all pins - Intel (100G, ice, idpf): - ice: implement standard ethtool and timestamping stats - i40e: support setting the max number of MAC addresses per VF - iavf: support RSS of GTP tunnels for 5G and LTE deployments - nVidia/Mellanox (mlx5): - reduce downtime on interface reconfiguration - disable being an XDP redirect target by default (same as other drivers) to avoid wasting resources if feature is unused - Meta (fbnic): - add support for Linux-managed PCS on 25G, 50G, and 100G links - Wangxun: - support Rx descriptor merge, and Tx head writeback - support Rx coalescing offload - support 25G SPF and 40G QSFP modules - Ethernet virtual: - Google (gve): - allow ethtool to configure rx_buf_len - implement XDP HW RX Timestamping support for DQ descriptor format - Microsoft vNIC (mana): - support HW link state events - handle hardware recovery events when probing the device - Ethernet NICs consumer, and embedded: - usbnet: add support for Byte Queue Limits (BQL) - AMD (amd-xgbe): - add device selftests - NXP (enetc): - add i.MX94 support - Broadcom integrated MACs (bcmgenet, bcmasp): - bcmasp: add support for PHY-based Wake-on-LAN - Broadcom switches (b53): - support port isolation - support BCM5389/97/98 and BCM63XX ARL formats - Lantiq/MaxLinear switches: - support bridge FDB entries on the CPU port - use regmap for register access - allow user to enable/disable learning - support Energy Efficient Ethernet - support configuring RMII clock delays - add tagging driver for MaxLinear GSW1xx switches - Synopsys (stmmac): - support using the HW clock in free running mode - add Eswin EIC7700 support - add Rockchip RK3506 support - add Altera Agilex5 support - Cadence (macb): - cleanup and consolidate descriptor and DMA address handling - add EyeQ5 support - TI: - icssg-prueth: support AF_XDP - Airoha access points: - add missing Ethernet stats and link state callback - add AN7583 support - support out-of-order Tx completion processing - Power over Ethernet: - pd692x0: preserve PSE configuration across reboots - add support for TPS23881B devices - Ethernet PHYs: - Open Alliance OATC14 10BASE-T1S PHY cable diagnostic support - Support 50G SerDes and 100G interfaces in Linux-managed PHYs - micrel: - support for non PTP SKUs of lan8814 - enable in-band auto-negotiation on lan8814 - realtek: - cable testing support on RTL8224 - interrupt support on RTL8221B - motorcomm: support for PHY LEDs on YT853 - microchip: support for LAN867X Rev.D0 PHYs w/ SQI and cable diag - mscc: support for PHY LED control - CAN drivers: - m_can: add support for optional reset and system wake up - remove can_change_mtu() obsoleted by core handling - mcp251xfd: support GPIO controller functionality - Bluetooth: - add initial support for PASTa - WiFi: - split ieee80211.h file, it's way too big - improvements in VHT radiotap reporting, S1G, Channel Switch Announcement handling, rate tracking in mesh networks - improve multi-radio monitor mode support, and add a cfg80211 debugfs interface for it - HT action frame handling on 6 GHz - initial chanctx work towards NAN - MU-MIMO sniffer improvements - WiFi drivers: - RealTek (rtw89): - support USB devices RTL8852AU and RTL8852CU - initial work for RTL8922DE - improved injection support - Intel: - iwlwifi: new sniffer API support - MediaTek (mt76): - WED support for >32-bit DMA - airoha NPU support - regdomain improvements - continued WiFi7/MLO work - Qualcomm/Atheros: - ath10k: factory test support - ath11k: TX power insertion support - ath12k: BSS color change support - ath12k: statistics improvements - brcmfmac: Acer A1 840 tablet quirk - rtl8xxxu: 40 MHz connection fixes/support" * tag 'net-next-6.19' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next: (1381 commits) net: page_pool: sanitise allocation order net: page pool: xa init with destroy on pp init net/mlx5e: Support XDP target xmit with dummy program net/mlx5e: Update XDP features in switch channels selftests/tc-testing: Test CAKE scheduler when enqueue drops packets net/sched: sch_cake: Fix incorrect qlen reduction in cake_drop wireguard: netlink: generate netlink code wireguard: uapi: generate header with ynl-gen wireguard: uapi: move flag enums wireguard: uapi: move enum wg_cmd wireguard: netlink: add YNL specification selftests: drv-net: Fix tolerance calculation in devlink_rate_tc_bw.py selftests: drv-net: Fix and clarify TC bandwidth split in devlink_rate_tc_bw.py selftests: drv-net: Set shell=True for sysfs writes in devlink_rate_tc_bw.py selftests: drv-net: Use Iperf3Runner in devlink_rate_tc_bw.py selftests: drv-net: introduce Iperf3Runner for measurement use cases selftests: drv-net: Add devlink_rate_tc_bw.py to TEST_PROGS net: ps3_gelic_net: Use napi_alloc_skb() and napi_gro_receive() Documentation: net: dsa: mention simple HSR offload helpers Documentation: net: dsa: mention availability of RedBox ...
2025-12-03Merge tag 'bpf-next-6.19' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next Pull bpf updates from Alexei Starovoitov: - Convert selftests/bpf/test_tc_edt and test_tc_tunnel from .sh to test_progs runner (Alexis Lothoré) - Convert selftests/bpf/test_xsk to test_progs runner (Bastien Curutchet) - Replace bpf memory allocator with kmalloc_nolock() in bpf_local_storage (Amery Hung), and in bpf streams and range tree (Puranjay Mohan) - Introduce support for indirect jumps in BPF verifier and x86 JIT (Anton Protopopov) and arm64 JIT (Puranjay Mohan) - Remove runqslower bpf tool (Hoyeon Lee) - Fix corner cases in the verifier to close several syzbot reports (Eduard Zingerman, KaFai Wan) - Several improvements in deadlock detection in rqspinlock (Kumar Kartikeya Dwivedi) - Implement "jmp" mode for BPF trampoline and corresponding DYNAMIC_FTRACE_WITH_JMP. It improves "fexit" program type performance from 80 M/s to 136 M/s. With Steven's Ack. (Menglong Dong) - Add ability to test non-linear skbs in BPF_PROG_TEST_RUN (Paul Chaignon) - Do not let BPF_PROG_TEST_RUN emit invalid GSO types to stack (Daniel Borkmann) - Generalize buildid reader into bpf_dynptr (Mykyta Yatsenko) - Optimize bpf_map_update_elem() for map-in-map types (Ritesh Oedayrajsingh Varma) - Introduce overwrite mode for BPF ring buffer (Xu Kuohai) * tag 'bpf-next-6.19' of git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next: (169 commits) bpf: optimize bpf_map_update_elem() for map-in-map types bpf: make kprobe_multi_link_prog_run always_inline selftests/bpf: do not hardcode target rate in test_tc_edt BPF program selftests/bpf: remove test_tc_edt.sh selftests/bpf: integrate test_tc_edt into test_progs selftests/bpf: rename test_tc_edt.bpf.c section to expose program type selftests/bpf: Add success stats to rqspinlock stress test rqspinlock: Precede non-head waiter queueing with AA check rqspinlock: Disable spinning for trylock fallback rqspinlock: Use trylock fallback when per-CPU rqnode is busy rqspinlock: Perform AA checks immediately rqspinlock: Enclose lock/unlock within lock entry acquisitions bpf: Remove runqslower tool selftests/bpf: Remove usage of lsm/file_alloc_security in selftest bpf: Disable file_alloc_security hook bpf: check for insn arrays in check_ptr_alignment bpf: force BPF_F_RDONLY_PROG on insn array creation bpf: Fix exclusive map memory leak selftests/bpf: Make CS length configurable for rqspinlock stress test selftests/bpf: Add lock wait time stats to rqspinlock stress test ...
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