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2026-03-25cpupower-info.1: describe the --perf-bias optionRoberto Ricci
The cpupower-info(1) man page only mentions the short form of the '--perf-bias' option in the synopsys, but the long form is not documented and its effect is not explained. cpupower-info.c: {"perf-bias", optional_argument, NULL, 'b'}, Signed-off-by: Roberto Ricci <io@r-ricci.it> Link: https://lore.kernel.org/r/20260324223921.14317-5-io@r-ricci.it Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
2026-03-25cpupower-frequency-info.1: document --boost and --epp optionsRoberto Ricci
`cpupower frequency-info` supports the '--boost' option since the program was first added with commit 7fe2f6399a84 ("cpupowerutils - cpufrequtils extended with quite some features"), but the man page lacks it. '--epp' has been added with commit 5f567afc283f ("cpupower: Add support for showing energy performance preference") but it has never been added to the man page. cpufreq-info.c: {"boost", no_argument, NULL, 'b'}, ... {"epp", no_argument, NULL, 'z'}, Signed-off-by: Roberto Ricci <io@r-ricci.it> Link: https://lore.kernel.org/r/20260324223921.14317-4-io@r-ricci.it Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
2026-03-25cpupower-frequency-info.1: use the proper name of the --perf optionRoberto Ricci
The cpupower-frequency-info(1) man page describes a '--perf' option. Even though this form is accepted by the program, its proper name is '--performance'. cpufreq-info.c: {"performance", no_argument, NULL, 'c'}, Signed-off-by: Roberto Ricci <io@r-ricci.it> Link: https://lore.kernel.org/r/20260324223921.14317-3-io@r-ricci.it Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
2026-03-25cpupower-idle-info.1: fix short option namesRoberto Ricci
The cpupower-idle-info(1) man page describes '-f' as the short form of the '--silent' option and '-e' as the short form of the '--proc' option. But they are not correct: $ cpupower idle-info -f idle-info: invalid option -- 'f' invalid or unknown argument $ cpupower idle-info -e idle-info: invalid option -- 'e' invalid or unknown argument The short form of '--silent' is actually '-s' and the short form of '--proc' is actually '-o': cpuidle-info.c: {"silent", no_argument, NULL, 's'}, {"proc", no_argument, NULL, 'o'}, Signed-off-by: Roberto Ricci <io@r-ricci.it> Link: https://lore.kernel.org/r/20260324223921.14317-2-io@r-ricci.it Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
2026-03-25tools/sched_ext: Regenerate autogen enum headersCheng-Yang Chou
Regenerate enum_defs.autogen.h, enums.autogen.h and enums.autogen.bpf.h using the upstream scripts [1][2] to sync with recent kernel enum additions. [1] https://github.com/sched-ext/scx/blob/main/scripts/gen_enum_defs.py [2] https://github.com/sched-ext/scx/blob/main/scripts/gen_enums.py Signed-off-by: Cheng-Yang Chou <yphbchou0911@gmail.com> Signed-off-by: Tejun Heo <tj@kernel.org>
2026-03-25selftests/bpf: Make reg_bounds test more robustAlexei Starovoitov
The verifier log output may contain multiple lines that start with 18: (bf) r0 = r6 teach reg_bounds to look for lines that have ';' in them, since reg_bounds test is looking for: 18: (bf) r0 = r6 ; R0=... R6=... Reviewed-by: Emil Tsalapatis <emil@etsalapatis.com> Link: https://lore.kernel.org/r/20260325012242.45606-1-alexei.starovoitov@gmail.com Signed-off-by: Alexei Starovoitov <ast@kernel.org>
2026-03-25Merge tag 'perf-tools-fixes-for-v7.0-2-2026-03-23' into perf-tools-nextNamhyung Kim
To get the various fixes for v7.0. Signed-off-by: Namhyung Kim <namhyung@kernel.org>
2026-03-24tcp: add cwnd_event_tx_start to tcp_congestion_opsEric Dumazet
(tcp_congestion_ops)->cwnd_event() is called very often, with @event oscillating between CA_EVENT_TX_START and other values. This is not branch prediction friendly. Provide a new cwnd_event_tx_start pointer dedicated for CA_EVENT_TX_START. Both BBR and CUBIC benefit from this change, since they only care about CA_EVENT_TX_START. No change in kernel size: $ scripts/bloat-o-meter -t vmlinux.0 vmlinux add/remove: 4/4 grow/shrink: 3/1 up/down: 564/-568 (-4) Function old new delta bbr_cwnd_event_tx_start - 450 +450 cubictcp_cwnd_event_tx_start - 70 +70 __pfx_cubictcp_cwnd_event_tx_start - 16 +16 __pfx_bbr_cwnd_event_tx_start - 16 +16 tcp_unregister_congestion_control 93 99 +6 tcp_update_congestion_control 518 521 +3 tcp_register_congestion_control 422 425 +3 __tcp_transmit_skb 3308 3306 -2 __pfx_cubictcp_cwnd_event 16 - -16 __pfx_bbr_cwnd_event 16 - -16 cubictcp_cwnd_event 80 - -80 bbr_cwnd_event 454 - -454 Total: Before=25240512, After=25240508, chg -0.00% Signed-off-by: Eric Dumazet <edumazet@google.com> Link: https://patch.msgid.link/20260323234920.1097858-1-edumazet@google.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2026-03-24selftests: drv-net: add missing tc config options for netkit testsBobby Eshleman
The NetDrvContEnv env context uses tc clsact qdiscs and BPF tc filters for traffic redirection, but the kernel config options are missing from the selftests config. Without them, the tc qdisc installation trips on: CMD: tc qdisc add dev enp1s0 clsact EXIT: 2 STDERR: Error: Specified qdisc kind is unknown. net.lib.py.utils.CmdExitFailure: Command failed Add CONFIG_NET_CLS_ACT and CONFIG_NET_SCH_INGRESS to enable these tc options. Fixes: 3f74d5bb807e ("selftests/net: Add env for container based tests") Signed-off-by: Bobby Eshleman <bobbyeshleman@meta.com> Link: https://patch.msgid.link/20260323-config-fixes-for-nk-tests-v2-1-6c505d83e52d@meta.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2026-03-24Merge commit 'f35dbac6942171dc4ce9398d1d216a59224590a9' into ↵Steven Rostedt
trace/ring-buffer/core The commit f35dbac69421 ("ring-buffer: Fix to update per-subbuf entries of persistent ring buffer") was a fix and merged upstream. It is needed for some other work in the ring buffer. The current branch has the remote buffer code that is shared with the Arm64 subsystem and can't be rebased. Merge in the upstream commit to allow continuing of the ring buffer work. Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
2026-03-24selftests/bpf: Test variable length stack writeAlexei Starovoitov
Add a test to make sure that variable length stack writes scrubs STACK_SPILL into STACK_MISC. Tested-by: Eduard Zingerman <eddyz87@gmail.com> Acked-by: Kumar Kartikeya Dwivedi <memxor@gmail.com> Link: https://lore.kernel.org/r/20260324215938.81733-2-alexei.starovoitov@gmail.com Signed-off-by: Alexei Starovoitov <ast@kernel.org>
2026-03-24selftests/futex: Bump up libnuma version checkDavidlohr Bueso
numa_set_mempolicy_home_node() was introduced in libnuma 2.0.18, not 2.0.16, via: https://github.com/numactl/numactl/commit/8f2ffc89654c Signed-off-by: Davidlohr Bueso <dave@stgolabs.net> Signed-off-by: Thomas Gleixner <tglx@kernel.org> Reviewed-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Link: https://patch.msgid.link/20260306182215.2088991-1-dave@stgolabs.net
2026-03-24selftests/futex: Conditionally include libnuma supportNylon Chen
Use LIBNUMA_TEST to conditionally add -lnuma to LDLIBS. Guard numa header includes with #ifdef LIBNUMA_VER_SUFFICIENT to allow compilation without libnuma installed. Co-developed-by: Zong Li <zong.li@sifive.com> Signed-off-by: Zong Li <zong.li@sifive.com> Signed-off-by: Nylon Chen <nylon.chen@sifive.com> Signed-off-by: Thomas Gleixner <tglx@kernel.org> Link: https://patch.msgid.link/20260301-20260128_nylon_chen_sifive_com-v3-1-995ab4cc71aa@sifive.com
2026-03-24selftests/bpf: verify_pkcs7_sig: Use 'struct module_signature' from the UAPI ↵Thomas Weißschuh
headers Now that the UAPI headers provide the required definitions, use those. Some symbols have been renamed, adapt to those. Signed-off-by: Thomas Weißschuh <thomas.weissschuh@linutronix.de> Reviewed-by: Petr Pavlu <petr.pavlu@suse.com> Reviewed-by: Nicolas Schier <nsc@kernel.org> Signed-off-by: Sami Tolvanen <samitolvanen@google.com>
2026-03-24sign-file: use 'struct module_signature' from the UAPI headersThomas Weißschuh
Now that the UAPI headers provide the required definitions, use those. Some symbols have been renamed, adapt to those. Also adapt the include path for the custom sign-file rule in the bpf selftests. Signed-off-by: Thomas Weißschuh <thomas.weissschuh@linutronix.de> Reviewed-by: Petr Pavlu <petr.pavlu@suse.com> Reviewed-by: Nicolas Schier <nsc@kernel.org> Signed-off-by: Sami Tolvanen <samitolvanen@google.com>
2026-03-24tools uapi headers: add linux/module_signature.hThomas Weißschuh
This header is going to be used from scripts/sign-file. Signed-off-by: Thomas Weißschuh <thomas.weissschuh@linutronix.de> Reviewed-by: Petr Pavlu <petr.pavlu@suse.com> Reviewed-by: Nicolas Schier <nsc@kernel.org> Signed-off-by: Sami Tolvanen <samitolvanen@google.com>
2026-03-24selftests/bpf: move trampoline_count to dedicated bpf_testmod targetSun Jian
trampoline_count fills all trampoline attachment slots for a single target function and verifies that one extra attach fails with -E2BIG. It currently targets bpf_modify_return_test, which is also used by other selftests such as modify_return, get_func_ip_test, and get_func_args_test. When such tests run in parallel, they can contend for the same per-function trampoline quota and cause unexpected attach failures. This issue is currently masked by harness serialization. Move trampoline_count to a dedicated bpf_testmod target and register it for fmod_ret attachment. Also route the final trigger through trigger_module_test_read(), so the execution path exercises the same dedicated target. This keeps the test semantics unchanged while isolating it from other selftests, so it no longer needs to run in serial mode. Remove the TODO comment as well. Tested: ./test_progs -t trampoline_count -vv ./test_progs -j$(nproc) -t trampoline_count -vv ./test_progs -j$(nproc) -t \ trampoline_count,modify_return,get_func_ip_test,get_func_args_test -vv 20 runs of: ./test_progs -j$(nproc) -t \ trampoline_count,modify_return,get_func_ip_test,get_func_args_test Signed-off-by: Sun Jian <sun.jian.kdev@gmail.com> Acked-by: Jiri Olsa <jolsa@kernel.org> Link: https://lore.kernel.org/r/20260324044949.869801-1-sun.jian.kdev@gmail.com Signed-off-by: Alexei Starovoitov <ast@kernel.org>
2026-03-24selftests/bpf: Fix sockmap_multi_channels reliabilityJiayuan Chen
Previously I added a FIONREAD test for sockmap, but it can occasionally fail in CI [1]. The test sends 10 bytes in two segments (2 + 8). For UDP, FIONREAD only reports the length of the first datagram, not the total queued data. The original code used recv_timeout() expecting all 10 bytes, but under high system load, the second datagram may not yet be processed by the protocol stack, so recv would only return the first 2-byte datagram, causing a size mismatch failure. Fix this by receiving exactly the expected bytes (matching FIONREAD) in the first recv. The remaining datagram is then consumed in a second recv block, which is only reachable for UDP since TCP's expected already equals sizeof(buf). Test: ./test_progs -a sockmap_basic 410/1 sockmap_basic/sockmap create_update_free:OK ... Summary: 1/35 PASSED, 0 SKIPPED, 0 FAILED [1] https://github.com/kernel-patches/bpf/actions/runs/22919385910/job/66515395423 Cc: Jiayuan Chen <jiayuan.chen@linux.dev> Fixes: 17e2ce02bf56 ("selftests/bpf: Add tests for FIONREAD and copied_seq") Signed-off-by: Jiayuan Chen <jiayuan.chen@shopee.com> Link: https://lore.kernel.org/r/20260312072549.6766-1-jiayuan.chen@linux.dev Signed-off-by: Alexei Starovoitov <ast@kernel.org>
2026-03-24selftests/bpf: Improve tc_tunnel test reliabilityJiayuan Chen
A test failure was discovered in BPF CI [1] caused by connection timeout. The current test timeout of 500ms is insufficient for CI environments, particularly under high load. While the optimal timeout is unclear, this test was converted from the original test_tc_tunnel.sh script. The original script used nc with "-w 1" to specify a 1-second timeout [2]. Therefore, this test restores the timeout to 1s. Test: ./test_progs -a tc_tunnel #478/1 tc_tunnel/ipip_none:OK #478/2 tc_tunnel/ipip6_none:OK #478/3 tc_tunnel/ip6tnl_none:OK #478/4 tc_tunnel/sit_none:OK #478/5 tc_tunnel/vxlan_eth:OK #478/6 tc_tunnel/ip6vxlan_eth:OK #478/7 tc_tunnel/gre_none:OK #478/8 tc_tunnel/gre_eth:OK #478/9 tc_tunnel/gre_mpls:OK #478/10 tc_tunnel/ip6gre_none:OK #478/11 tc_tunnel/ip6gre_eth:OK #478/12 tc_tunnel/ip6gre_mpls:OK #478/13 tc_tunnel/udp_none:OK #478/14 tc_tunnel/udp_eth:OK #478/15 tc_tunnel/udp_mpls:OK #478/16 tc_tunnel/ip6udp_none:OK #478/17 tc_tunnel/ip6udp_eth:OK #478/18 tc_tunnel/ip6udp_mpls:OK #478 tc_tunnel:OK Summary: 1/18 PASSED, 0 SKIPPED, 0 FAILED [1] https://github.com/kernel-patches/bpf/actions/runs/22674350732/job/65728072723 [2] https://lore.kernel.org/all/20251027-tc_tunnel-v3-4-505c12019f9d@bootlin.com/ Cc: Jiayuan Chen <jiayuan.chen@linux.dev> Signed-off-by: Jiayuan Chen <jiayuan.chen@shopee.com> Link: https://lore.kernel.org/r/20260312083615.31835-1-jiayuan.chen@linux.dev Signed-off-by: Alexei Starovoitov <ast@kernel.org>
2026-03-24selftests/bpf: Add trampolines single and multi-level pointer params test ↵Slava Imameev
coverage Add single and multi-level pointer parameters and return value test coverage for BPF trampolines. Includes verifier tests for single and multi-level pointers. The tests check verifier logs for pointers inferred as scalar() type. Signed-off-by: Slava Imameev <slava.imameev@crowdstrike.com> Acked-by: Eduard Zingerman <eddyz87@gmail.com> Link: https://lore.kernel.org/r/20260314082127.7939-3-slava.imameev@crowdstrike.com Signed-off-by: Alexei Starovoitov <ast@kernel.org>
2026-03-24selftests/sched_ext: Skip rt_stall on older kernels and list skipped testsCheng-Yang Chou
rt_stall tests the ext DL server which was introduced in commit cd959a356205 ("sched_ext: Add a DL server for sched_ext tasks"). On older kernels that lack this feature, the test calls ksft_exit_fail() internally which terminates the entire runner process, preventing subsequent tests from running. Add a guard in setup() that checks for the ext_server field in struct rq via __COMPAT_struct_has_field() and returns SCX_TEST_SKIP if not present. Also print the names of skipped tests in the results summary, mirroring the existing behavior for failed tests. Signed-off-by: Cheng-Yang Chou <yphbchou0911@gmail.com> Signed-off-by: Tejun Heo <tj@kernel.org>
2026-03-24selftests/cgroup: Don't require synchronous populated update on task exitTejun Heo
test_cgcore_populated (test_core) and test_cgkill_{simple,tree,forkbomb} (test_kill) check cgroup.events "populated 0" immediately after reaping child tasks with waitpid(). This used to work because cgroup_task_exit() in do_exit() unlinked tasks from css_sets before exit_notify() woke up waitpid(). d245698d727a ("cgroup: Defer task cgroup unlink until after the task is done switching out") moved the unlink to cgroup_task_dead() in finish_task_switch(), which runs after exit_notify(). The populated counter is now decremented after the parent's waitpid() can return, so there is no longer a synchronous ordering guarantee. On PREEMPT_RT, where cgroup_task_dead() is further deferred through lazy irq_work, the race window is even larger. The synchronous populated transition was never part of the cgroup interface contract - it was an implementation artifact. Use cg_read_strcmp_wait() which retries for up to 1 second, matching what these tests actually need to verify: that the cgroup eventually becomes unpopulated after all tasks exit. Fixes: d245698d727a ("cgroup: Defer task cgroup unlink until after the task is done switching out") Reported-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Signed-off-by: Tejun Heo <tj@kernel.org> Tested-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Cc: Christian Brauner <brauner@kernel.org> Cc: cgroups@vger.kernel.org
2026-03-24Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvmLinus Torvalds
Pull kvm fixes from Paolo Bonzini: "ARM: - Clear the pending exception state from a vcpu coming out of reset, as it could otherwise affect the first instruction executed in the guest - Fix pointer arithmetic in address translation emulation, so that the Hardware Access bit is set on the correct PTE instead of some other location s390: - Fix deadlock in new memory management - Properly handle kernel faults on donated memory - Fix bounds checking for irq routing, with selftest - Fix invalid machine checks and log all of them" * tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm: KVM: arm64: Fix the descriptor address in __kvm_at_swap_desc() KVM: s390: vsie: Avoid injecting machine check on signal KVM: s390: log machine checks more aggressively KVM: s390: selftests: Add IRQ routing address offset tests KVM: s390: Limit adapter indicator access to mapped page s390/mm: Add missing secure storage access fixups for donated memory KVM: arm64: Discard PC update state on vcpu reset KVM: s390: Fix a deadlock
2026-03-24selftests/bpf: Test 32-bit scalar spill pruning in stacksafe()Alexei Starovoitov
Add a test verifying that stacksafe() correctly handles 32-bit scalar spills when comparing stack states for equivalence during state pruning. A 32-bit scalar spill creates slot[0-3] = STACK_INVALID and slot[4-7] = STACK_SPILL. Without the im=4 check in stacksafe(), the STACK_SPILL vs STACK_MISC mismatch at byte 4 causes pruning to fail, forcing the verifier to re-explore a path that is provably safe. Acked-by: Eduard Zingerman <eddyz87@gmail.com> Link: https://lore.kernel.org/r/20260323022410.75444-2-alexei.starovoitov@gmail.com Signed-off-by: Alexei Starovoitov <ast@kernel.org>
2026-03-24Merge tag 'kvm-s390-master-7.0-1' of ↵Paolo Bonzini
git://git.kernel.org/pub/scm/linux/kernel/git/kvms390/linux into HEAD KVM: s390: Fixes for 7.0 - fix deadlock in new memory management - handle kernel faults on donated memory properly - fix bounds checking for irq routing + selftest - fix invalid machine checks + logging
2026-03-24Merge tag 'perf-tools-fixes-for-v7.0-2-2026-03-23' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/perf/perf-tools Pull perf tools fixes from Arnaldo Carvalho de Melo: - Fix parsing 'overwrite' in command line event definitions in big-endian machines by writing correct union member - Fix finding default metric in 'perf stat' - Fix relative paths for including headers in 'perf kvm stat' - Sync header copies with the kernel sources: msr-index.h, kvm, build_bug.h * tag 'perf-tools-fixes-for-v7.0-2-2026-03-23' of git://git.kernel.org/pub/scm/linux/kernel/git/perf/perf-tools: tools headers: Synchronize linux/build_bug.h with the kernel sources tools headers UAPI: Sync x86's asm/kvm.h with the kernel sources tools headers UAPI: Sync linux/kvm.h with the kernel sources tools arch x86: Sync the msr-index.h copy with the kernel sources perf kvm stat: Fix relative paths for including headers perf parse-events: Fix big-endian 'overwrite' by writing correct union member perf metricgroup: Fix metricgroup__has_metric_or_groups() tools headers: Skip arm64 cputype.h check
2026-03-24selftests/bpf: Add test for struct_ops __ref argument in any positionVarun R Mallya
Add a selftest to verify that the verifier correctly identifies refcounted arguments in struct_ops programs, even when they are not the first argument. This ensures that the restriction on tail calls for programs with __ref arguments is properly enforced regardless of which argument they appear in. This test verifies the fix for check_struct_ops_btf_id() proposed by Keisuke Nishimura [0], which corrected a bug where only the first argument was checked for the refcounted flag. The test includes: - An update to bpf_testmod to add 'test_refcounted_multi', an operator with three arguments where the third is tagged with "__ref". - A BPF program 'test_refcounted_multi' that attempts a tail call. - A test runner that asserts the verifier rejects the program with "program with __ref argument cannot tail call". [0]: https://lore.kernel.org/bpf/20260320130219.63711-1-keisuke.nishimura@inria.fr/ Signed-off-by: Varun R Mallya <varunrmallya@gmail.com> Link: https://lore.kernel.org/r/20260321214038.80479-1-varunrmallya@gmail.com Signed-off-by: Alexei Starovoitov <ast@kernel.org>
2026-03-24selftests/bpf: Fix compiler warnings in task_local_data.hAmery Hung
Fix compiler warnings about unused parameter, narrowing non-constant into a smaller type and comparison between integers of different size. Signed-off-by: Amery Hung <ameryhung@gmail.com> Acked-by: Kumar Kartikeya Dwivedi <memxor@gmail.com> Link: https://lore.kernel.org/r/20260323231133.859941-1-ameryhung@gmail.com Signed-off-by: Alexei Starovoitov <ast@kernel.org>
2026-03-24bpftool: Enable aarch64 ISA extensions for JIT disassemblyPuranjay Mohan
The LLVM disassembler needs ISA extension features enabled to correctly decode instructions from those extensions. On aarch64, without these features, instructions like LSE atomics (e.g. ldaddal) are silently decoded as incorrect instructions and disassembly is truncated. Use LLVMCreateDisasmCPUFeatures() with "+all" features for aarch64 targets so that the disassembler can handle any instruction the kernel JIT might emit. Before: int bench_trigger_uprobe(void * ctx): bpf_prog_538c6a43d1c6b84c_bench_trigger_uprobe: ; int cpu = bpf_get_smp_processor_id(); 0: mov x9, x30 4: nop 8: stp x29, x30, [sp, #-16]! c: mov x29, sp 10: stp xzr, x26, [sp, #-16]! 14: mov x26, sp 18: mrs x10, SP_EL0 1c: ldr w7, [x10, #16] ; __sync_add_and_fetch(&hits[cpu & CPU_MASK].value, 1); 20: and w7, w7, #0xff ; __sync_add_and_fetch(&hits[cpu & CPU_MASK].value, 1); 24: lsl x7, x7, #7 28: mov x0, #-281474976710656 2c: movk x0, #32768, lsl #32 30: movk x0, #35407, lsl #16 34: add x0, x0, x7 38: mov x1, #1 ; __sync_add_and_fetch(&hits[cpu & CPU_MASK].value, 1); 3c: mov x1, #1 After: int bench_trigger_uprobe(void * ctx): bpf_prog_538c6a43d1c6b84c_bench_trigger_uprobe: ; int cpu = bpf_get_smp_processor_id(); 0: mov x9, x30 4: nop 8: stp x29, x30, [sp, #-16]! c: mov x29, sp 10: stp xzr, x26, [sp, #-16]! 14: mov x26, sp 18: mrs x10, SP_EL0 1c: ldr w7, [x10, #16] ; __sync_add_and_fetch(&hits[cpu & CPU_MASK].value, 1); 20: and w7, w7, #0xff ; __sync_add_and_fetch(&hits[cpu & CPU_MASK].value, 1); 24: lsl x7, x7, #7 28: mov x0, #-281474976710656 2c: movk x0, #32768, lsl #32 30: movk x0, #35407, lsl #16 34: add x0, x0, x7 38: mov x1, #1 ; __sync_add_and_fetch(&hits[cpu & CPU_MASK].value, 1); 3c: ldaddal x1, x1, [x0] ; return 0; 40: mov w7, #0 44: ldp xzr, x26, [sp], #16 48: ldp x29, x30, [sp], #16 4c: mov x0, x7 50: ret 54: nop 58: ldr x10, #8 5c: br x10 Signed-off-by: Puranjay Mohan <puranjay@kernel.org> Acked-by: Yonghong Song <yonghong.song@linux.dev> Acked-by: Leon Hwang <leon.hwang@linux.dev> Acked-by: Quentin Monnet <qmo@kernel.org> Reviewed-by: Emil Tsalapatis <emil@etsalapatis.com> Link: https://lore.kernel.org/r/20260318172259.2882792-1-puranjay@kernel.org Signed-off-by: Alexei Starovoitov <ast@kernel.org>
2026-03-24selftests: team: add non-Ethernet header_ops reproducerJiayuan Chen
Add a team selftest that sets up: g0 (gre) -> b0 (bond) -> t0 (team) and triggers IPv6 traffic on t0. This reproduces the non-Ethernet header_ops confusion scenario and protects against regressions in stacked team/bond/gre configurations. Using this script, the panic reported by syzkaller can be reproduced [1]. After the fix: # ./non_ether_header_ops.sh PASS: non-Ethernet header_ops stacking did not crash [1] https://syzkaller.appspot.com/bug?extid=3d8bc31c45e11450f24c Cc: Jiayuan Chen <jiayuan.chen@linux.dev> Signed-off-by: Jiayuan Chen <jiayuan.chen@shopee.com> Link: https://patch.msgid.link/20260320072139.134249-3-jiayuan.chen@linux.dev Signed-off-by: Paolo Abeni <pabeni@redhat.com>
2026-03-23selftests: net: io_uring_zerocopy: enable io_uring for the testAleksei Oladko
The io_uring_zerocopy.sh kselftest assumes that io_uring support is enabled on the host system. When io_uring is disabled via the kernel.io_uring_disabled sysctl, the test fails. Explicitly enable io_uring for the test by setting kernel.io_uring_disabled=0. Save the original value of kernel.io_uring_disabled before changing it and restore it in cleanup handler to ensure the system state is restored regardless of test outcome. Signed-off-by: Aleksei Oladko <aleksey.oladko@virtuozzo.com> Signed-off-by: Konstantin Khorenko <khorenko@virtuozzo.com> Link: https://patch.msgid.link/20260321215908.175465-5-aleksey.oladko@virtuozzo.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2026-03-23selftests: net: run reuseport in an isolated netnsAleksei Oladko
The reuseport_* tests (bpf, bpf_cpu, bpf_numa, dualstack) currently use a fixed port range. This can cause intermittent test failures when the ports are already in use by other services: failed to bind receive socket: Address already in use To avoid conflicts, run these tests in separate network namespaces using unshare. Each test now has its own isolated network stack, preventing port collisions with the host services. Signed-off-by: Aleksei Oladko <aleksey.oladko@virtuozzo.com> Link: https://patch.msgid.link/20260321215908.175465-2-aleksey.oladko@virtuozzo.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2026-03-23selftests: rds: Add -c config option to rds/config.shAllison Henderson
This patch adds a new -c flag to config.sh that enables callers to specify the file path of the config they would like to update. If no config is specified, the default will be the .config of the current directory. Signed-off-by: Allison Henderson <achender@kernel.org> Link: https://patch.msgid.link/20260320041834.2761069-3-achender@kernel.org Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2026-03-23selftests: rds: add tools/testing/selftests/net/rds/configAllison Henderson
The ksft CI runtime needs an rds specific config file to build a minimal kernel with the right options enabled. This patch adds an rds selftest config containing the required CONFIG_RDS* and CONFIG_NET_* options. Signed-off-by: Allison Henderson <achender@kernel.org> Link: https://patch.msgid.link/20260320041834.2761069-2-achender@kernel.org Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2026-03-23selftests: bonding: add test for stacked bond header_parse recursionJiayuan Chen
Add a selftest to reproduce the infinite recursion in bond_header_parse() when bonds are stacked (bond1 -> bond0 -> gre). When a packet is received via AF_PACKET SOCK_DGRAM on the topmost bond, dev_parse_header() calls bond_header_parse() which used skb->dev (always the topmost bond) to get the bonding struct. This caused it to recurse back into itself indefinitely, leading to stack overflow. Before commit b7405dcf7385 ("bonding: prevent potential infinite loop in bond_header_parse()"), the test triggers: ./bond_stacked_header_parse.sh [ 71.999481] BUG: MAX_LOCK_DEPTH too low! [ 72.000170] turning off the locking correctness validator. [ 72.001029] Please attach the output of /proc/lock_stat to the bug report [ 72.002079] depth: 48 max: 48! ... After the fix, everything works fine: ./bond_stacked_header_parse.sh TEST: Stacked bond header_parse does not recurse [ OK ] Signed-off-by: Jiayuan Chen <jiayuan.chen@shopee.com> Link: https://patch.msgid.link/20260320022245.392384-1-jiayuan.chen@linux.dev Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2026-03-23selftests: forwarding: local_termination: fix PTP UDP cksumsDaniel Golle
All six PTP-over-IP test frames (3x IPv4 + 3x IPv6) contain incorrect UDP checksums. The stored values are the ones-complement sums of just the pseudo-headers, not the complete UDP checksums over pseudo-header + UDP header + payload. This is characteristic of frames captured on the sender before TX checksum offload completion. For example, the IPv4 Sync and Follow-Up frames both store checksum 0xa3c8 despite having different UDP payloads and port numbers - 0xa3c8 is their shared pseudo-header sum (same src/dst IP, same protocol and UDP length). While most L2 switches forward frames without verifying transport checksums, hardware that performs deep packet inspection or has PTP awareness may validate UDP checksums and drop frames that fail verification. This causes the 1588v2 over IPv4/IPv6 tests to fail on such hardware even though L2 PTP (which has no UDP checksum) passes fine. Replace all six pseudo-header partial sums with the correctly computed full UDP checksums: IPv4 Sync: 0xa3c8 -> 0x9f41 IPv4 Follow-Up: 0xa3c8 -> 0xeb8a IPv4 Peer Delay Req: 0xa2bc -> 0x9ab9 IPv6 Sync: 0x2e92 -> 0x1476 IPv6 Follow-Up: 0x2e92 -> 0xf047 IPv6 Peer Delay Req: 0xb454 -> 0x891f Signed-off-by: Daniel Golle <daniel@makrotopia.org> Reviewed-by: Alexander Sverdlin <alexander.sverdlin@gmail.com> Link: https://patch.msgid.link/651c3decb80023e4395ec149fd81110afa3869a1.1774067006.git.daniel@makrotopia.org Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2026-03-23selftests: rss_drv: Add RSS indirection table resize testsBjörn Töpel
Add resize tests to rss_drv.py. Devices without dynamic table sizing are skipped via _require_dynamic_indir_size(). resize_periodic: set a periodic 4-entry table, shrink channels to fold, grow back to unfold. Check the exact pattern is preserved. Has main and non-default context variants. resize_below_user_size_reject: send a periodic table with user_size between the big and small device table sizes. Verify that shrinking below user_size is rejected even though the table is periodic. Has main and non-default context variants. resize_nonperiodic_reject: set a non-periodic table (equal N), verify that channel reduction is rejected. resize_nonperiodic_no_corruption: verify a failed resize leaves both the indirection table contents and the channel count unchanged. Signed-off-by: Björn Töpel <bjorn@kernel.org> Link: https://patch.msgid.link/20260320085826.1957255-5-bjorn@kernel.org Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2026-03-23selftest: net: Add GC test for temporary routes with exceptions.Kuniyuki Iwashima
Without the prior commit, IPv6 GC cannot track exceptions tied to permanent routes if they were originally added as temporary routes. Let's add a test case for the issue. 1. Add temporary routes 2. Create exceptions for the temporary routes 3. Promote the routes to permanent routes 4. Check if GC can find and purge the exceptions A few notes: + At step 4, unlike other test cases, we cannot wait for $GC_WAIT_TIME. While the exceptions are always iterable via netlink (since it traverses the entire fib tree instead of tb6_gc_hlist), rt6_nh_dump_exceptions() skips expired entries. If we waited for the expiration time, we would be unable to distinguish whether the exceptions were truly purged by GC or just hidden due to being expired. + For the same reason, at step 2, we use ICMPv6 redirect message instead of Packet Too Big message. This is because MTU exceptions always have RTF_EXPIRES, and rt6_age_examine_exception() does not respect the period specified by net.ipv6.route.flush=1. + We add a neighbour entry for the redirect target with NTF_ROUTER. Without this, the exceptions would be removed at step 3 when the fib6_may_remove_gc_list() is called. Without the fix, the exceptions remain even after GC is triggered by sysctl -wq net.ipv6.route.flush=1. FAIL: Expected 0 routes, got 5 TEST: ipv6 route garbage collection (promote to permanent routes) [FAIL] With the fix, GC purges the exceptions properly. TEST: ipv6 route garbage collection (promote to permanent routes) [ OK ] Signed-off-by: Kuniyuki Iwashima <kuniyu@google.com> Reviewed-by: David Ahern <dsahern@kernel.org> Link: https://patch.msgid.link/20260320072317.2561779-4-kuniyu@google.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2026-03-23selftests/bpf: Improve connect_force_port test reliabilityVarun R Mallya
The connect_force_port test fails intermittently in CI because the hardcoded server ports (60123/60124) may already be in use by other tests or processes [1]. Fix this by passing port 0 to start_server(), letting the kernel assign a free port dynamically. The actual assigned port is then propagated to the BPF programs by writing it into the .bss map's initial value (via bpf_map__initial_value()) before loading, so the BPF programs use the correct backend port at runtime. [1] https://github.com/kernel-patches/bpf/actions/runs/22697676317/job/65808536038 Suggested-by: Jiayuan Chen <jiayuan.chen@linux.dev> Signed-off-by: Varun R Mallya <varunrmallya@gmail.com> Signed-off-by: Martin KaFai Lau <martin.lau@kernel.org> Reviewed-by: Sun Jian <sun.jian.kdev@gmail.com> Reviewed-by: Jiayuan Chen <jiayuan.chen@linux.dev> Link: https://patch.msgid.link/20260323081131.65604-1-varunrmallya@gmail.com
2026-03-23tools/sched_ext: Add scx_bpf_sub_dispatch() compat wrapperCheng-Yang Chou
Add a transparent compatibility wrapper for the scx_bpf_sub_dispatch() kfunc in compat.bpf.h. This allows BPF schedulers using the sub-sched dispatch feature to build and run on older kernels that lack the kfunc. To avoid requiring code changes in individual schedulers, the transparent wrapper pattern is used instead of a __COMPAT prefix. The kfunc is declared with a ___compat suffix, while the static inline wrapper retains the original scx_bpf_sub_dispatch() name. When the kfunc is unavailable, the wrapper safely falls back to returning false. This is acceptable because the dispatch path cannot do anything useful without underlying sub-sched support anyway. Tested scx_qmap on v6.14 successfully. Signed-off-by: Cheng-Yang Chou <yphbchou0911@gmail.com> Signed-off-by: Tejun Heo <tj@kernel.org>
2026-03-23selftests: check pidfd_info->coredump_code correctnessEmanuele Rocca
Extend the coredump_socket and coredump_socket_protocol selftests to verify that the field coredump_code is set as expected in struct pidfd_info. Signed-off-by: Emanuele Rocca <emanuele.rocca@arm.com> Link: https://patch.msgid.link/acE6Eyuv2MM75pmk@NH27D9T0LF Signed-off-by: Christian Brauner <brauner@kernel.org>
2026-03-23kselftest/coredump: reintroduce null pointer dereferenceEmanuele Rocca
Commit 673a55cc49da replaced the null pointer dereference used in crashing_child() with __builtin_trap to address the following LLVM warnings: coredump_test_helpers.c:59:6: warning: indirection of non-volatile null pointer will be deleted, not trap [-Wnull-dereference] coredump_test_helpers.c:59:6: note: consider using __builtin_trap() or qualifying pointer with 'volatile' All coredump tests expect crashing_child() to result in a SIGSEGV. However, the behavior of __builtin_trap is architecture-dependent. On x86 it yields SIGILL, on aarch64 SIGTRAP. Given that neither of those signals are SIGSEGV, both coredump_socket_test and coredump_socket_protocol_test are currently failing: get_pidfd_info: mask=0xd7, coredump_mask=0x5, coredump_signal=5 socket_coredump_signal_sigsegv: coredump_signal=5, expected SIGSEGV=11 Qualify the pointer with volatile instead of calling __builtin_trap to fix the tests. Signed-off-by: Emanuele Rocca <emanuele.rocca@arm.com> Link: https://patch.msgid.link/ab2kI0PI_Vk6bU88@NH27D9T0LF Reviewed-by: Mark Brown <broonie@kernel.org> Signed-off-by: Christian Brauner <brauner@kernel.org>
2026-03-22Merge git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf 7.0-rc5Alexei Starovoitov
Cross-merge BPF and other fixes after downstream PR. Minor conflicts in: tools/testing/selftests/bpf/progs/exceptions_fail.c tools/testing/selftests/bpf/progs/verifier_bounds.c Signed-off-by: Alexei Starovoitov <ast@kernel.org>
2026-03-22selftests/sched_ext: Add tests for SCX_ENQ_IMMED and scx_bpf_dsq_reenq()zhidao su
Add three selftests covering features introduced in v7.1: - dsq_reenq: Verify scx_bpf_dsq_reenq() on user DSQs triggers ops.enqueue() with SCX_ENQ_REENQ and SCX_TASK_REENQ_KFUNC in p->scx.flags. - enq_immed: Verify SCX_OPS_ALWAYS_ENQ_IMMED slow path where tasks dispatched to a busy CPU's local DSQ are re-enqueued through ops.enqueue() with SCX_TASK_REENQ_IMMED. - consume_immed: Verify SCX_ENQ_IMMED via the consume path using scx_bpf_dsq_move_to_local___v2() with explicit SCX_ENQ_IMMED. All three tests skip gracefully on kernels that predate the required features by checking availability via __COMPAT_has_ksym() / __COMPAT_read_enum() before loading. Signed-off-by: zhidao su <suzhidao@xiaomi.com> Signed-off-by: Tejun Heo <tj@kernel.org>
2026-03-22Merge tag 'v7.0-rc5' into driver-core-nextDanilo Krummrich
We need the driver-core fixes in here as well to build on top of. Signed-off-by: Danilo Krummrich <dakr@kernel.org>
2026-03-22tools headers: Synchronize linux/build_bug.h with the kernel sourcesArnaldo Carvalho de Melo
To pick up the changes in: 6ffd853b0b10e1e2 ("build_bug.h: correct function parameters names in kernel-doc") That just add some comments, addressing this perf tools build warning: Warning: Kernel ABI header differences: diff -u tools/include/linux/build_bug.h include/linux/build_bug.h Please take a look at tools/include/uapi/README for further info on this synchronization process. Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Ian Rogers <irogers@google.com> Cc: Randy Dunlap <rdunlap@infradead.org> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2026-03-22tools headers UAPI: Sync x86's asm/kvm.h with the kernel sourcesArnaldo Carvalho de Melo
To pick the changes in: e2ffe85b6d2bb778 ("KVM: x86: Introduce KVM_X86_QUIRK_VMCS12_ALLOW_FREEZE_IN_SMM") That just rebuilds kvm-stat.c on x86, no change in functionality. This silences these perf build warning: Warning: Kernel ABI header differences: diff -u tools/arch/x86/include/uapi/asm/kvm.h arch/x86/include/uapi/asm/kvm.h Please see tools/include/uapi/README for further details. Cc: Jim Mattson <jmattson@google.com> Cc: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2026-03-22tools headers UAPI: Sync linux/kvm.h with the kernel sourcesArnaldo Carvalho de Melo
To pick the changes in: da142f3d373a6dda ("KVM: Remove subtle "struct kvm_stats_desc" pseudo-overlay") That just rebuilds perf, as these patches don't add any new KVM ioctl to be harvested for the 'perf trace' ioctl syscall argument beautifiers. This addresses this perf build warning: Warning: Kernel ABI header differences: diff -u tools/include/uapi/linux/kvm.h include/uapi/linux/kvm.h Please see tools/include/uapi/README for further details. Cc: Sean Christopherson <seanjc@google.com> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2026-03-22tools arch x86: Sync the msr-index.h copy with the kernel sourcesArnaldo Carvalho de Melo
To pick up the changes from these csets: 9073428bb204d921 ("x86/sev: Allow IBPB-on-Entry feature for SNP guests") That cause no changes to tooling as it doesn't include a new MSR to be captured by the tools/perf/trace/beauty/tracepoints/x86_msr.sh script. Just silences this perf build warning: Warning: Kernel ABI header differences: diff -u tools/arch/x86/include/asm/msr-index.h arch/x86/include/asm/msr-index.h Cc: Borislav Petkov (AMD) <bp@alien8.de> Cc: Kim Phillips <kim.phillips@amd.com> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2026-03-22docs: kernel-doc: add support to store output on a YAML fileMauro Carvalho Chehab
Add a command line parameter and library support to optionally store: - KdocItem intermediate format after parsing; - man pages output; - rst output. inside a YAML file. Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org> Signed-off-by: Jonathan Corbet <corbet@lwn.net> Message-ID: <ba54277b3c909867153b9547dfa33c1831ca35d9.1773823995.git.mchehab+huawei@kernel.org>
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