Linux kernel stable tree (mirror) https://git.radix-linux.su/kernel/linux.git/atom?h=v6.19.11 2025-10-07T15:40:15+00:00 2025-10-07T15:40:15+00:00 Linus Torvalds torvalds@linux-foundation.org 2025-10-07T15:40:15+00:00 urn:sha1:221533629550e920580ab428f13ffebf54063b95 Pull hyperv updates from Wei Liu: - Unify guest entry code for KVM and MSHV (Sean Christopherson) - Switch Hyper-V MSI domain to use msi_create_parent_irq_domain() (Nam Cao) - Add CONFIG_HYPERV_VMBUS and limit the semantics of CONFIG_HYPERV (Mukesh Rathor) - Add kexec/kdump support on Azure CVMs (Vitaly Kuznetsov) - Deprecate hyperv_fb in favor of Hyper-V DRM driver (Prasanna Kumar T S M) - Miscellaneous enhancements, fixes and cleanups (Abhishek Tiwari, Alok Tiwari, Nuno Das Neves, Wei Liu, Roman Kisel, Michael Kelley) * tag 'hyperv-next-signed-20251006' of git://git.kernel.org/pub/scm/linux/kernel/git/hyperv/linux: hyperv: Remove the spurious null directive line MAINTAINERS: Mark hyperv_fb driver Obsolete fbdev/hyperv_fb: deprecate this in favor of Hyper-V DRM driver Drivers: hv: Make CONFIG_HYPERV bool Drivers: hv: Add CONFIG_HYPERV_VMBUS option Drivers: hv: vmbus: Fix typos in vmbus_drv.c Drivers: hv: vmbus: Fix sysfs output format for ring buffer index Drivers: hv: vmbus: Clean up sscanf format specifier in target_cpu_store() x86/hyperv: Switch to msi_create_parent_irq_domain() mshv: Use common "entry virt" APIs to do work in root before running guest entry: Rename "kvm" entry code assets to "virt" to genericize APIs entry/kvm: KVM: Move KVM details related to signal/-EINTR into KVM proper mshv: Handle NEED_RESCHED_LAZY before transferring to guest x86/hyperv: Add kexec/kdump support on Azure CVMs Drivers: hv: Simplify data structures for VMBus channel close message Drivers: hv: util: Cosmetic changes for hv_utils_transport.c mshv: Add support for a new parent partition configuration clocksource: hyper-v: Skip unnecessary checks for the root partition hyperv: Add missing field to hv_output_map_device_interrupt 2025-10-04T21:59:29+00:00 Linus Torvalds torvalds@linux-foundation.org 2025-10-04T21:59:29+00:00 urn:sha1:908057d185a41560a55890afa69c9676fc63e55c Pull crypto updates from Herbert Xu: "Drivers: - Add ciphertext hiding support to ccp - Add hashjoin, gather and UDMA data move features to hisilicon - Add lz4 and lz77_only to hisilicon - Add xilinx hwrng driver - Add ti driver with ecb/cbc aes support - Add ring buffer idle and command queue telemetry for GEN6 in qat Others: - Use rcu_dereference_all to stop false alarms in rhashtable - Fix CPU number wraparound in padata" * tag 'v6.18-p1' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6: (78 commits) dt-bindings: rng: hisi-rng: convert to DT schema crypto: doc - Add explicit title heading to API docs hwrng: ks-sa - fix division by zero in ks_sa_rng_init KEYS: X.509: Fix Basic Constraints CA flag parsing crypto: anubis - simplify return statement in anubis_mod_init crypto: hisilicon/qm - set NULL to qm->debug.qm_diff_regs crypto: hisilicon/qm - clear all VF configurations in the hardware crypto: hisilicon - enable error reporting again crypto: hisilicon/qm - mask axi error before memory init crypto: hisilicon/qm - invalidate queues in use crypto: qat - Return pointer directly in adf_ctl_alloc_resources crypto: aspeed - Fix dma_unmap_sg() direction rhashtable: Use rcu_dereference_all and rcu_dereference_all_check crypto: comp - Use same definition of context alloc and free ops crypto: omap - convert from tasklet to BH workqueue crypto: qat - Replace kzalloc() + copy_from_user() with memdup_user() crypto: caam - double the entropy delay interval for retry padata: WQ_PERCPU added to alloc_workqueue users padata: replace use of system_unbound_wq with system_dfl_wq crypto: cryptd - WQ_PERCPU added to alloc_workqueue users ... 2025-10-01T00:58:11+00:00 Linus Torvalds torvalds@linux-foundation.org 2025-10-01T00:58:11+00:00 urn:sha1:ae28ed4578e6d5a481e39c5a9827f27048661fdd Pull bpf updates from Alexei Starovoitov: - Support pulling non-linear xdp data with bpf_xdp_pull_data() kfunc (Amery Hung) Applied as a stable branch in bpf-next and net-next trees. - Support reading skb metadata via bpf_dynptr (Jakub Sitnicki) Also a stable branch in bpf-next and net-next trees. - Enforce expected_attach_type for tailcall compatibility (Daniel Borkmann) - Replace path-sensitive with path-insensitive live stack analysis in the verifier (Eduard Zingerman) This is a significant change in the verification logic. More details, motivation, long term plans are in the cover letter/merge commit. - Support signed BPF programs (KP Singh) This is another major feature that took years to materialize. Algorithm details are in the cover letter/marge commit - Add support for may_goto instruction to s390 JIT (Ilya Leoshkevich) - Add support for may_goto instruction to arm64 JIT (Puranjay Mohan) - Fix USDT SIB argument handling in libbpf (Jiawei Zhao) - Allow uprobe-bpf program to change context registers (Jiri Olsa) - Support signed loads from BPF arena (Kumar Kartikeya Dwivedi and Puranjay Mohan) - Allow access to union arguments in tracing programs (Leon Hwang) - Optimize rcu_read_lock() + migrate_disable() combination where it's used in BPF subsystem (Menglong Dong) - Introduce bpf_task_work_schedule*() kfuncs to schedule deferred execution of BPF callback in the context of a specific task using the kernel’s task_work infrastructure (Mykyta Yatsenko) - Enforce RCU protection for KF_RCU_PROTECTED kfuncs (Kumar Kartikeya Dwivedi) - Add stress test for rqspinlock in NMI (Kumar Kartikeya Dwivedi) - Improve the precision of tnum multiplier verifier operation (Nandakumar Edamana) - Use tnums to improve is_branch_taken() logic (Paul Chaignon) - Add support for atomic operations in arena in riscv JIT (Pu Lehui) - Report arena faults to BPF error stream (Puranjay Mohan) - Search for tracefs at /sys/kernel/tracing first in bpftool (Quentin Monnet) - Add bpf_strcasecmp() kfunc (Rong Tao) - Support lookup_and_delete_elem command in BPF_MAP_STACK_TRACE (Tao Chen) * tag 'bpf-next-6.18' of git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next: (197 commits) libbpf: Replace AF_ALG with open coded SHA-256 selftests/bpf: Add stress test for rqspinlock in NMI selftests/bpf: Add test case for different expected_attach_type bpf: Enforce expected_attach_type for tailcall compatibility bpftool: Remove duplicate string.h header bpf: Remove duplicate crypto/sha2.h header libbpf: Fix error when st-prefix_ops and ops from differ btf selftests/bpf: Test changing packet data from kfunc selftests/bpf: Add stacktrace map lookup_and_delete_elem test case selftests/bpf: Refactor stacktrace_map case with skeleton bpf: Add lookup_and_delete_elem for BPF_MAP_STACK_TRACE selftests/bpf: Fix flaky bpf_cookie selftest selftests/bpf: Test changing packet data from global functions with a kfunc bpf: Emit struct bpf_xdp_sock type in vmlinux BTF selftests/bpf: Task_work selftest cleanup fixes MAINTAINERS: Delete inactive maintainers from AF_XDP bpf: Mark kfuncs as __noclone selftests/bpf: Add kprobe multi write ctx attach test selftests/bpf: Add kprobe write ctx attach test selftests/bpf: Add uprobe context ip register change test ... 2025-09-30T22:50:18+00:00 Sean Christopherson seanjc@google.com 2025-08-28T00:01:54+00:00 urn:sha1:9be7e1e320ff2e7db4b23c8ec5f599bbfac94ede Rename the "kvm" entry code files and Kconfigs to use generic "virt" nomenclature so that the code can be reused by other hypervisors (or rather, their root/dom0 partition drivers), without incorrectly suggesting the code somehow relies on and/or involves KVM. No functional change intended. Signed-off-by: Sean Christopherson <seanjc@google.com> Reviewed-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Joel Fernandes <joelagnelf@nvidia.com> Signed-off-by: Wei Liu <wei.liu@kernel.org> 2025-09-25T07:57:15+00:00 Menglong Dong menglong8.dong@gmail.com 2025-09-17T06:09:14+00:00 urn:sha1:88a90315a99a9120cd471bf681515cc77cd7cdb8 In the next commit, we will move the definition of migrate_enable() and migrate_disable() to linux/sched.h. However, migrate_enable/migrate_disable will be used in commit 1b93c03fb319 ("rcu: add rcu_read_lock_dont_migrate()") in bpf-next tree. In order to fix potential compiling error, replace linux/preempt.h with linux/sched.h in include/linux/rcupdate.h. Signed-off-by: Menglong Dong <dongml2@chinatelecom.cn> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> 2025-09-20T12:21:03+00:00 Herbert Xu herbert@gondor.apana.org.au 2025-09-09T09:50:56+00:00 urn:sha1:bee8a520eb84950193d0566ea2c2e46406a4b6ce Add rcu_dereference_all and rcu_dereference_all_check so that library code such as rhashtable can be used with any RCU variant. As it stands rcu_dereference is used within rashtable, which creates false-positive warnings if the user calls it from another RCU context, such as preempt_disable(). Use the rcu_dereference_all and rcu_dereference_all_check calls in rhashtable to suppress these warnings. Also replace the rcu_dereference_raw calls in the list iterators with rcu_dereference_all to uncover buggy calls. Reported-by: Menglong Dong <dongml2@chinatelecom.cn> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Reviewed-by: Paul E. McKenney <paulmck@kernel.org> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> 2025-08-26T01:52:16+00:00 Menglong Dong menglong8.dong@gmail.com 2025-08-21T09:06:03+00:00 urn:sha1:1b93c03fb319d72a1f5f4723abd5df15ce40f4e2 migrate_disable() is called to disable migration in the kernel, and it is often used together with rcu_read_lock(). However, with PREEMPT_RCU disabled, it's unnecessary, as rcu_read_lock() will always disable preemption, which will also disable migration. Introduce rcu_read_lock_dont_migrate() and rcu_read_unlock_migrate(), which will do the migration enable and disable only when PREEMPT_RCU. Signed-off-by: Menglong Dong <dongml2@chinatelecom.cn> Reviewed-by: Paul E. McKenney <paulmck@kernel.org> Link: https://lore.kernel.org/r/20250821090609.42508-2-dongml2@chinatelecom.cn Signed-off-by: Alexei Starovoitov <ast@kernel.org> 2025-04-01T07:12:17+00:00 Josh Poimboeuf jpoimboe@kernel.org 2025-04-01T04:26:46+00:00 urn:sha1:6309a5c43b0dc629851f25b2e5ef8beff61d08e5 Thanks to CONFIG_DEBUG_SECTION_MISMATCH, empty functions can be generated out of line. rcu_irq_work_resched() can be called from noinstr code, so make sure it's always inlined. Fixes: 564506495ca9 ("rcu/context-tracking: Move deferred nocb resched to context tracking") Reported-by: Randy Dunlap <rdunlap@infradead.org> Signed-off-by: Josh Poimboeuf <jpoimboe@kernel.org> Signed-off-by: Ingo Molnar <mingo@kernel.org> Cc: Frederic Weisbecker <frederic@kernel.org> Cc: Paul E. McKenney <paulmck@kernel.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Link: https://lore.kernel.org/r/e84f15f013c07e4c410d972e75620c53b62c1b3e.1743481539.git.jpoimboe@kernel.org Closes: https://lore.kernel.org/d1eca076-fdde-484a-b33e-70e0d167c36d@infradead.org 2025-03-25T02:41:37+00:00 Linus Torvalds torvalds@linux-foundation.org 2025-03-25T02:41:37+00:00 urn:sha1:3ba7dfb8da62c43ea02bc278863367c2b0427cc1 Pull RCU updates from Boqun Feng: "Documentation: - Add broken-timing possibility to stallwarn.rst - Improve discussion of this_cpu_ptr(), add raw_cpu_ptr() - Document self-propagating callbacks - Point call_srcu() to call_rcu() for detailed memory ordering - Add CONFIG_RCU_LAZY delays to call_rcu() kernel-doc header - Clarify RCU_LAZY and RCU_LAZY_DEFAULT_OFF help text - Remove references to old grace-period-wait primitives srcu: - Introduce srcu_read_{un,}lock_fast(), which is similar to srcu_read_{un,}lock_lite(): avoid smp_mb()s in lock and unlock at the cost of calling synchronize_rcu() in synchronize_srcu() Moreover, by returning the percpu offset of the counter at srcu_read_lock_fast() time, srcu_read_unlock_fast() can avoid extra pointer dereferencing, which makes it faster than srcu_read_{un,}lock_lite() srcu_read_{un,}lock_fast() are intended to replace rcu_read_{un,}lock_trace() if possible RCU torture: - Add get_torture_init_jiffies() to return the start time of the test - Add a test_boost_holdoff module parameter to allow delaying boosting tests when building rcutorture as built-in - Add grace period sequence number logging at the beginning and end of failure/close-call results - Switch to hexadecimal for the expedited grace period sequence number in the rcu_exp_grace_period trace point - Make cur_ops->format_gp_seqs take buffer length - Move RCU_TORTURE_TEST_{CHK_RDR_STATE,LOG_CPU} to bool - Complain when invalid SRCU reader_flavor is specified - Add FORCE_NEED_SRCU_NMI_SAFE Kconfig for testing, which forces SRCU uses atomics even when percpu ops are NMI safe, and use the Kconfig for SRCU lockdep testing Misc: - Split rcu_report_exp_cpu_mult() mask parameter and use for tracing - Remove READ_ONCE() for rdp->gpwrap access in __note_gp_changes() - Fix get_state_synchronize_rcu_full() GP-start detection - Move RCU Tasks self-tests to core_initcall() - Print segment lengths in show_rcu_nocb_gp_state() - Make RCU watch ct_kernel_exit_state() warning - Flush console log from kernel_power_off() - rcutorture: Allow a negative value for nfakewriters - rcu: Update TREE05.boot to test normal synchronize_rcu() - rcu: Use _full() API to debug synchronize_rcu() Make RCU handle PREEMPT_LAZY better: - Fix header guard for rcu_all_qs() - rcu: Rename PREEMPT_AUTO to PREEMPT_LAZY - Update __cond_resched comment about RCU quiescent states - Handle unstable rdp in rcu_read_unlock_strict() - Handle quiescent states for PREEMPT_RCU=n, PREEMPT_COUNT=y - osnoise: Provide quiescent states - Adjust rcutorture with possible PREEMPT_RCU=n && PREEMPT_COUNT=y combination - Limit PREEMPT_RCU configurations - Make rcutorture senario TREE07 and senario TREE10 use PREEMPT_LAZY=y" * tag 'rcu-next-v6.15' of git://git.kernel.org/pub/scm/linux/kernel/git/rcu/linux: (59 commits) rcutorture: Make scenario TREE07 build CONFIG_PREEMPT_LAZY=y rcutorture: Make scenario TREE10 build CONFIG_PREEMPT_LAZY=y rcu: limit PREEMPT_RCU configurations rcutorture: Update ->extendables check for lazy preemption rcutorture: Update rcutorture_one_extend_check() for lazy preemption osnoise: provide quiescent states rcu: Use _full() API to debug synchronize_rcu() rcu: Update TREE05.boot to test normal synchronize_rcu() rcutorture: Allow a negative value for nfakewriters Flush console log from kernel_power_off() context_tracking: Make RCU watch ct_kernel_exit_state() warning rcu/nocb: Print segment lengths in show_rcu_nocb_gp_state() rcu-tasks: Move RCU Tasks self-tests to core_initcall() rcu: Fix get_state_synchronize_rcu_full() GP-start detection torture: Make SRCU lockdep testing use srcu_read_lock_nmisafe() srcu: Add FORCE_NEED_SRCU_NMI_SAFE Kconfig for testing rcutorture: Complain when invalid SRCU reader_flavor is specified rcutorture: Move RCU_TORTURE_TEST_{CHK_RDR_STATE,LOG_CPU} to bool rcutorture: Make cur_ops->format_gp_seqs take buffer length rcutorture: Add ftrace-compatible timestamp to GP# failure/close-call output ... 2025-03-05T02:47:32+00:00 Boqun Feng boqun.feng@gmail.com 2025-03-05T02:47:32+00:00 urn:sha1:467c890f2d1ad6de9fd1dbd196fdc8f3ee63190a