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2026-06-30vfio: selftests: Add luuid to libvfio.mk's list of libraries, not to the ↵Sean Christopherson
Makefile Link to the uuid library as part of libvfio.mk instead of as only linking it via VFIO selftests' Makefile, as the whole point of providing libvfio.mk is to allow linking the VFIO library functionality into KVM selftests, without KVM selftests having to know the gory details or duplicate code. Cc: Raghavendra Rao Ananta <rananta@google.com> Cc: David Matlack <dmatlack@google.com> Cc: Vipin Sharma <vipinsh@google.com> Cc: Alex Williamson <alex@shazbot.org> Fixes: e65f1bf8a2db ("vfio: selftests: Extend container/iommufd setup for passing vf_token") Signed-off-by: Sean Christopherson <seanjc@google.com> Reviewed-by: David Matlack <dmatlack@google.com> Link: https://lore.kernel.org/r/20260630212805.474418-1-seanjc@google.com Signed-off-by: Alex Williamson <alex@shazbot.org>
2026-06-30cxl/test: Add cxl_test accelerator driverDave Jiang
Add a type2 accelerator mock driver for the platform device that simulates a CXL type2 device. The driver exercises the same minimal API calls that a real CXL type2 driver would utilize. Tested-by: Alison Schofield <alison.schofield@intel.com> Reviewed-by: Alison Schofield <alison.schofield@intel.com> Link: https://patch.msgid.link/20260629221104.3891733-8-dave.jiang@intel.com Signed-off-by: Dave Jiang <dave.jiang@intel.com>
2026-06-30cxl/test: Fixup hdm init for auto region to support type2Dave Jiang
Add support to setup initialization of decoders in order to support type2 auto region. Reviewed-by: Alison Schofield <alison.schofield@intel.com> Tested-by: Alison Schofield <alison.schofield@intel.com> Link: https://patch.msgid.link/20260629221104.3891733-7-dave.jiang@intel.com Signed-off-by: Dave Jiang <dave.jiang@intel.com>
2026-06-30cxl/test: Propagate -ENOMEM on platform_device_alloc() failuresDave Jiang
Set rc = -ENOMEM at every platform_device_alloc() failure site in cxl_rch_topo_init(), cxl_single_topo_init() and cxl_test_init() so the failure is propagated and the module load aborts cleanly. The cxl_acpi allocation site originates in the commit below, while the host-bridge/root-port/uport/dport allocation sites fixed here were added later in the single-host and RCH topology configs. Fixes: 67dcdd4d3b83 ("tools/testing/cxl: Introduce a mocked-up CXL port hierarchy") Fixes: e41c8452b9b2 ("tools/testing/cxl: Add a single-port host-bridge regression config") Fixes: c9435dbee119 ("tools/testing/cxl: Add an RCH topology") Assisted-by: Claude:claude-opus-4-8 Tested-by: Alison Schofield <alison.schofield@intel.com> Reviewed-by: Alison Schofield <alison.schofield@intel.com> Link: https://patch.msgid.link/20260629221104.3891733-6-dave.jiang@intel.com Signed-off-by: Dave Jiang <dave.jiang@intel.com>
2026-06-30cxl/test: Add hierarchy enumeration support for type2 deviceDave Jiang
Add enumeration of type2 device hierarchy in cxl-test. The type2 device is setup to be directly attached to a root port instead of rp -> switch -> device that type3 hierarchy is setup.. Tested-by: Alison Schofield <alison.schofield@intel.com> Reviewed-by: Alison Schofield <alison.schofield@intel.com> Link: https://patch.msgid.link/20260629221104.3891733-5-dave.jiang@intel.com Signed-off-by: Dave Jiang <dave.jiang@intel.com>
2026-06-30cxl/test: Refactor platform device enumerationsDave Jiang
Split all the host bridges, rootports, upstream and downstream ports enumerations to separate helper functions. This should make adding type2 hierarchy easier later on. Tested-by: Alison Schofield <alison.schofield@intel.com> Reviewed-by: Alison Schofield <alison.schofield@intel.com> Link: https://patch.msgid.link/20260629221104.3891733-4-dave.jiang@intel.com Signed-off-by: Dave Jiang <dave.jiang@intel.com>
2026-06-30cxl/test: Add type2 support for mock CFMWS0Dave Jiang
Add a module parameter 'type2_test' for triggering type2 test support in cxl_test. Setup the CFMWS0 configuration to be type2 when 'type2_test' is set. Tested-by: Alison Schofield <alison.schofield@intel.com> Reviewed-by: Alison Schofield <alison.schofield@intel.com> Link: https://patch.msgid.link/20260629221104.3891733-3-dave.jiang@intel.com Signed-off-by: Dave Jiang <dave.jiang@intel.com>
2026-06-30cxl/test: Add test for module parametersDave Jiang
Add a test for module paraters during module init to make sure that only one is activated. [dj: Dropped counting fail_autoassemble modparm. (Alison) ] Suggested-by: Alison Schofield <alison.schofield@intel.com> Tested-by: Alison Schofield <alison.schofield@intel.com> Reviewed-by: Alison Schofield <alison.schofield@intel.com> Link: https://patch.msgid.link/20260629221104.3891733-2-dave.jiang@intel.com Signed-off-by: Dave Jiang <dave.jiang@intel.com>
2026-06-30perf test: Skip failing 'perf test aslr' test caseThomas Richter
The test case 'perf test aslr' fails on s390. The root cause of the failure is subtest test_callchain_aslr. This test invokes command # ./perf record -g -e task-clock:u -o /tmp/perf-test-aslr \ -- perf test -w noploop 3 to generate a call stack using event task-clock:u. On s390 this defaults to '--call-graph dwarf' whereas on x86_64 this defaults to framepointer (fp) format. The command # ./perf inject --aslr -i /tmp/perf-test-aslr now scans all SAMPLE entries recorded in the perf.data file to convert possible addresses. This is done in aslr_tool__process_sample() looking at sample_type bits PERF_SAMPLE_IP, PERF_SAMPLE_TID, PERF_SAMPLE_TIME, PERF_SAMPLE_PERIOD, PERF_SAMPLE_CALLCHAIN, PERF_SAMPLE_REGS_USER and PERF_SAMPLE_STACK_USER. On s390 the samples do not contain FP entries of type PERF_SAMPLE_CALLCHAIN (the bit is set in sample_type, but the number of FP entries is 0). The processing enters the PERF_SAMPLE_STACK_USER portion where the data is copied to the newly constructed sample and then aborted with this warning: /* TODO: can this be less conservative? */ pr_debug("Dropping stack user sample as possible ASLR leak\n"); With command line option '--call-graph dwarf' the new output file does not contain any samples at all. This leads to a missing $new_addr value in the shell script and a failure. Fix this and skip this subtest. Emit a hint that this subtest is currently unsupported on all platform when option --call-graph dwarf is selected. Since one subtest is skipped, the complete test is reported as skipped. Fixes: 190c45463844 ("perf test: Add inject ASLR test") Signed-off-by: Thomas Richter <tmricht@linux.ibm.com> Reviewed-by: Ian Rogers <irogers@google.com> Suggested-by: Sumanth Korikkar <sumanthk@linux.ibm.com> Signed-off-by: Namhyung Kim <namhyung@kernel.org>
2026-06-30perf kvm stat: Add missing mappings for PPC kvm exit reasonsGautam Menghani
The macro kvm_trace_symbol_exit is used for providing the mappings for the exit trap vectors and their names. Add mappings for H_FAC_UNAVAIL and H_VIRT so that exit reasons are displayed as string instead of vector numbers when using perf kvm stat. Signed-off-by: Gautam Menghani <gautam@linux.ibm.com> Signed-off-by: Namhyung Kim <namhyung@kernel.org>
2026-06-30perf scripts: Add configurable sorting option to powerpc-hcallsShivani Nittor
The powerpc-hcalls.py script currently prints hypercall statistics in a fixed sort order based on the number of hcall occurrences, making it difficult to analyze hcalls from different execution characteristics. Add support for runtime-configurable sorting so users can order hypercall statistics by count, minimum latency, maximum latency, or average latency using a --sort option. Parse arguments through sys.argv to support perf script argument passing semantics. Example: perf record -a -e powerpc* sleep 10 perf script -s ./powerpc-hcalls.py -i ./perf.data -- --sort=max SORT KEY = max hcall count min(ns) max(ns) avg(ns) H_SEND_LOGICAL_LAN 47 7380 40148 8739 H_VIO_SIGNAL 706 880 17454 1911 H_RANDOM 1 15176 15176 15176 H_PUT_TCE_INDIRECT 4 3032 10444 4956 H_ADD_LOGICAL_LAN_BUFFER 363 1250 8716 1534 H_SEND_CRQ 8 2086 6846 3044 H_PUT_TCE 9 1284 4932 2646 H_STUFF_TCE 13 1620 3962 2358 This makes it easier to identify frequently occurring or high-latency hypercalls depending on the analysis being performed. Signed-off-by: Shivani Nittor <shivani@linux.ibm.com> Signed-off-by: Namhyung Kim <namhyung@kernel.org>
2026-06-30perf script powerpc: Fix a typo in the name of H_DISABLE_AND_GETGautam Menghani
The name of the hcall for opcode 432 is "H_DISABLE_AND_GET". This typo was fixed in the main file [1] in the commit 0f10228c6ff6 ("KVM: PPC: Fix typo on H_DISABLE_AND_GET hcall"). [1]: arch/powerpc/include/asm/hvcall.h Signed-off-by: Gautam Menghani <gautam@linux.ibm.com> Signed-off-by: Namhyung Kim <namhyung@kernel.org>
2026-06-30perf script powerpc: Update the hcall list with new hcallsGautam Menghani
Update the hcall list with the newer hcalls in PPC. [1]: github.com/torvalds/linux/blob/master/arch/powerpc/include/asm/hvcall.h Signed-off-by: Gautam Menghani <gautam@linux.ibm.com> Reviewed-by: Shivani Nittor <shivani@linux.ibm.com> Signed-off-by: Namhyung Kim <namhyung@kernel.org>
2026-06-30perf vendor events intel: Update tigerlake events from 1.18 to 1.19Chun-Tse Shao
The updated events were published in: https://github.com/intel/perfmon/commit/8353ffb63efcad6b6fac1a8c05d76e2d6317ae23 Signed-off-by: Chun-Tse Shao <ctshao@google.com> Reviewed-by: Dapeng Mi <dapeng1.mi@linux.intel.com> Reviewed-by: Ian Rogers <irogers@google.com> Signed-off-by: Namhyung Kim <namhyung@kernel.org>
2026-06-30perf vendor events intel: Update pantherlake events from 1.05 to 1.06Chun-Tse Shao
The updated events were published in: https://github.com/intel/perfmon/commit/ffc03fc3b414127c5a36bbb648e500c4afeff134 Signed-off-by: Chun-Tse Shao <ctshao@google.com> Reviewed-by: Dapeng Mi <dapeng1.mi@linux.intel.com> Reviewed-by: Ian Rogers <irogers@google.com> Signed-off-by: Namhyung Kim <namhyung@kernel.org>
2026-06-30perf vendor events intel: Update lunarlake events from 1.22 to 1.25Chun-Tse Shao
The updated events were published in: https://github.com/intel/perfmon/commit/5535a3e8cc14ae8ef58013cf3d8e9480018b911a Signed-off-by: Chun-Tse Shao <ctshao@google.com> Reviewed-by: Dapeng Mi <dapeng1.mi@linux.intel.com> Reviewed-by: Ian Rogers <irogers@google.com> Signed-off-by: Namhyung Kim <namhyung@kernel.org>
2026-06-30perf vendor events intel: Update graniterapids events from 1.18 to 1.19Chun-Tse Shao
The updated events were published in: https://github.com/intel/perfmon/commit/875354c88686ef50387d9601f52354a6da8f24cc Signed-off-by: Chun-Tse Shao <ctshao@google.com> Reviewed-by: Dapeng Mi <dapeng1.mi@linux.intel.com> Reviewed-by: Ian Rogers <irogers@google.com> Signed-off-by: Namhyung Kim <namhyung@kernel.org>
2026-06-30perf vendor events intel: Update emeraldrapids events from 1.23 to 1.24Chun-Tse Shao
The updated events were published in: https://github.com/intel/perfmon/commit/3f1d40d1953193e75c6b5a559638cf1f67bacaed Signed-off-by: Chun-Tse Shao <ctshao@google.com> Reviewed-by: Dapeng Mi <dapeng1.mi@linux.intel.com> Reviewed-by: Ian Rogers <irogers@google.com> Signed-off-by: Namhyung Kim <namhyung@kernel.org>
2026-06-30perf vendor events intel: Update arrowlake events from 1.17 to 1.19Chun-Tse Shao
The updated events were published in: https://github.com/intel/perfmon/commit/b84e75626ae78558b8f526a276e4597c5ca6c429 Signed-off-by: Chun-Tse Shao <ctshao@google.com> Reviewed-by: Dapeng Mi <dapeng1.mi@linux.intel.com> Reviewed-by: Ian Rogers <irogers@google.com> Link: https://github.com/intel/perfmon/commit/b84e75626ae78558b8f526a276e4597c5ca6c429 Signed-off-by: Namhyung Kim <namhyung@kernel.org>
2026-06-30tools/perf/sched: Update process names of processes in zombie state for both ↵Athira Rajeev
-s and -S options In redhat perftool testsuite, observed fail for this test: -- [ FAIL ] -- perf_sched :: test_timehist :: --with-summary (output regexp parsing) This led to analysis of "perf sched timehist" summary options. # perf sched record -a -o ./perf.data -- sleep 0.1 This will record using perf sched record perf sched timeliest has two options "-s" and "-S" # perf sched -i ./perf.data timehist -S -S : Captures summary also at the end # perf sched -i ./perf.data timehist -s -s : Captures only summary The test saves -s result which has only summary and compares with summary which comes at the end from -S . Since there is a difference in these two, test fails. Checking the behaviour change in -S and -s results, difference is: rcu_sched[16] 2 4 0.013 0.001 0.003 0.006 33.23 0 migration/11[73] 2 1 0.006 0.006 0.006 0.006 0.00 0 migration/3[33] 2 1 0.006 0.006 0.006 0.006 0.00 0 - :216753[216753] -1 1 0.041 0.041 0.041 0.041 0.00 0 + sleep[216753] -1 1 0.041 0.041 0.041 0.041 0.00 0 migration/8[58] 2 1 0.005 0.005 0.005 0.005 0.00 0 NetworkManager[811] 1 2 0.089 0.028 0.044 0.060 36.06 0 migration/13[83] 2 1 0.005 0.005 0.005 0.005 0.00 0 Here 216753 is pid for sleep which is a zombie process. This is happening in latest kernel due to an update in "-S" result. In -S, the process name appears in the results "sleep[216753]", where as in the -s, only pid is present in the summary result ":216753[216753]". After commit 39f473f6d0b2 ("perf sched timehist: decode process names of processes in zombie state") for -S option, if process name is using pid, it uses different way to set it. So that we get the process name and not just Pid. This change went in only for timehist_print_sample() function. Add this improvement in generic place so that even -s option (which captures summary) also will have meaningful information. Acked-by: Namhyung Kim <namhyung@kernel.org> Tested-by: Venkat Rao Bagalkote <venkat88@linux.ibm.com> Signed-off-by: Athira Rajeev <atrajeev@linux.ibm.com> Signed-off-by: Namhyung Kim <namhyung@kernel.org>
2026-06-30perf python: Add LiveSession helperIan Rogers
Add LiveSession class in tools/perf/python/perf_live.py to support live event collection using perf.evlist and perf.parse_events, avoiding the need to fork a separate perf record process. Signed-off-by: Ian Rogers <irogers@google.com> Assisted-by: Gemini:gemini-3.1-pro-preview Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Alice Rogers <alice.mei.rogers@gmail.com> Cc: Dapeng Mi <dapeng1.mi@linux.intel.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: James Clark <james.clark@linaro.org> Cc: Leo Yan <leo.yan@linux.dev> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Richter <tmricht@linux.ibm.com> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> Signed-off-by: Namhyung Kim <namhyung@kernel.org>
2026-06-30perf python: Add perf.pyi stubs fileIan Rogers
Add Python type stubs for the perf module to improve IDE support and static analysis. Includes docstrings for classes, methods, and constants derived from C source and JSON definitions. Assisted-by: Gemini:gemini-3.1-pro-preview Signed-off-by: Ian Rogers <irogers@google.com> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Alice Rogers <alice.mei.rogers@gmail.com> Cc: Dapeng Mi <dapeng1.mi@linux.intel.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: James Clark <james.clark@linaro.org> Cc: Leo Yan <leo.yan@linux.dev> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Richter <tmricht@linux.ibm.com> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> Signed-off-by: Namhyung Kim <namhyung@kernel.org>
2026-06-30perf python: Add type checking for parse_events/parse_metricsIan Rogers
The threads and cpus parameters in parse_events and parse_metrics are parsed with the 'O' format specifier but blindly casted in the C extension. If a user passes an invalid object type, this leads to memory corruption when dereferencing the expected struct. Add runtime PyObject_TypeCheck validations in python.c to safely raise a TypeError if an invalid object is passed. Signed-off-by: Ian Rogers <irogers@google.com> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Alice Rogers <alice.mei.rogers@gmail.com> Cc: Dapeng Mi <dapeng1.mi@linux.intel.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: James Clark <james.clark@linaro.org> Cc: Leo Yan <leo.yan@linux.dev> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Richter <tmricht@linux.ibm.com> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> Signed-off-by: Namhyung Kim <namhyung@kernel.org>
2026-06-30perf python: Handle Py_None for thread and cpu mapsIan Rogers
The python stubs allow passing None for threads and cpus to the perf.parse_events() and perf.parse_metrics() bindings. However, PyArg_ParseTuple parses None into a Py_None object, which is not a NULL pointer. Because the C code lacked an explicit check for Py_None, it would cast Py_None to a pyrf_thread_map/pyrf_cpu_map struct pointer and dereference it, causing a memory corruption crash. Fix this pre-existing issue by explicitly checking for Py_None alongside NULL in pyrf__parse_events, pyrf__parse_metrics, and pyrf_evsel__open. Signed-off-by: Ian Rogers <irogers@google.com> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Alice Rogers <alice.mei.rogers@gmail.com> Cc: Dapeng Mi <dapeng1.mi@linux.intel.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: James Clark <james.clark@linaro.org> Cc: Leo Yan <leo.yan@linux.dev> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Richter <tmricht@linux.ibm.com> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> Signed-off-by: Namhyung Kim <namhyung@kernel.org>
2026-06-30perf python: Add config file accessIan Rogers
Add perf.config_get(name) to expose the perf configuration system. Assisted-by: Gemini:gemini-3.1-pro-preview Signed-off-by: Ian Rogers <irogers@google.com> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Alice Rogers <alice.mei.rogers@gmail.com> Cc: Dapeng Mi <dapeng1.mi@linux.intel.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: James Clark <james.clark@linaro.org> Cc: Leo Yan <leo.yan@linux.dev> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Richter <tmricht@linux.ibm.com> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> Signed-off-by: Namhyung Kim <namhyung@kernel.org>
2026-06-30perf python: Add syscall name/id to convert syscall number and nameIan Rogers
Use perf's syscalltbl support to convert syscall number to name assuming the number is for the host machine. This avoids python libaudit support as tools/perf/scripts/python/syscall-counts.py requires. Assisted-by: Gemini:gemini-3.1-pro-preview Signed-off-by: Ian Rogers <irogers@google.com> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Alice Rogers <alice.mei.rogers@gmail.com> Cc: Dapeng Mi <dapeng1.mi@linux.intel.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: James Clark <james.clark@linaro.org> Cc: Leo Yan <leo.yan@linux.dev> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Richter <tmricht@linux.ibm.com> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> Signed-off-by: Namhyung Kim <namhyung@kernel.org>
2026-06-30perf python: Expose brstack in sample eventIan Rogers
Implement pyrf_branch_entry and pyrf_branch_stack for lazy iteration over branch stack entries. Assisted-by: Gemini:gemini-3.1-pro-preview Signed-off-by: Ian Rogers <irogers@google.com> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Alice Rogers <alice.mei.rogers@gmail.com> Cc: Dapeng Mi <dapeng1.mi@linux.intel.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: James Clark <james.clark@linaro.org> Cc: Leo Yan <leo.yan@linux.dev> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Richter <tmricht@linux.ibm.com> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> Signed-off-by: Namhyung Kim <namhyung@kernel.org>
2026-06-30perf python: Extend API for stat events in python.cIan Rogers
Add stat information to the session. Add call backs for stat events. Assisted-by: Gemini:gemini-3.1-pro-preview Signed-off-by: Ian Rogers <irogers@google.com> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Alice Rogers <alice.mei.rogers@gmail.com> Cc: Dapeng Mi <dapeng1.mi@linux.intel.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: James Clark <james.clark@linaro.org> Cc: Leo Yan <leo.yan@linux.dev> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Richter <tmricht@linux.ibm.com> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> Signed-off-by: Namhyung Kim <namhyung@kernel.org>
2026-06-30perf python: Add callchain supportIan Rogers
Implement pyrf_callchain_node and pyrf_callchain types for lazy iteration over callchain frames. Add callchain property to sample_event. Assisted-by: Gemini:gemini-3.1-pro-preview Signed-off-by: Ian Rogers <irogers@google.com> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Alice Rogers <alice.mei.rogers@gmail.com> Cc: Dapeng Mi <dapeng1.mi@linux.intel.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: James Clark <james.clark@linaro.org> Cc: Leo Yan <leo.yan@linux.dev> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Richter <tmricht@linux.ibm.com> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> Signed-off-by: Namhyung Kim <namhyung@kernel.org>
2026-06-30perf python: Add mmap2 eventIan Rogers
If mmap is handled so should mmap2 events. Add support as a distinct python event type. Assisted-by: Gemini:gemini-3.1-pro-preview Signed-off-by: Ian Rogers <irogers@google.com> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Alice Rogers <alice.mei.rogers@gmail.com> Cc: Dapeng Mi <dapeng1.mi@linux.intel.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: James Clark <james.clark@linaro.org> Cc: Leo Yan <leo.yan@linux.dev> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Richter <tmricht@linux.ibm.com> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> Signed-off-by: Namhyung Kim <namhyung@kernel.org>
2026-06-30perf python: Refactor and add accessors to sample eventIan Rogers
Add common evsel field for events and move sample specific fields to only be present in sample events. Add accessors for sample events. Ensure offsets are within the bounds of the event. Allocate just enough memory for the copied event, don't make the maximum event size each time. Assisted-by: Gemini:gemini-3.1-pro-preview Signed-off-by: Ian Rogers <irogers@google.com> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Alice Rogers <alice.mei.rogers@gmail.com> Cc: Dapeng Mi <dapeng1.mi@linux.intel.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: James Clark <james.clark@linaro.org> Cc: Leo Yan <leo.yan@linux.dev> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Richter <tmricht@linux.ibm.com> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> Signed-off-by: Namhyung Kim <namhyung@kernel.org>
2026-06-30perf python: Add python session abstraction wrapping perf's sessionIan Rogers
Sessions are necessary to be able to use perf.data files within a tool. Add a wrapper python type that incorporates the tool. Allow a sample callback to be passed when creating the session. When process_events is run this callback will be called, if supplied, for sample events. An example use looks like: ``` $ perf record -e cycles,instructions -a sleep 3 $ PYTHONPATH=..../perf/python python3 Python 3.13.7 (main, Aug 20 2025, 22:17:40) [GCC 14.2.0] on linux Type "help", "copyright", "credits" or "license" for more information. >>> import perf >>> count=0 ... def handle_sample(x): ... global count ... if count < 3: ... print(dir(x)) ... count = count + 1 ... perf.session(perf.data("perf.data"),sample=handle_sample).process_events() ... ['__class__', '__delattr__', '__dir__', '__doc__', '__eq__', '__format__', '__ge__', '__getattribute__', '__getstate__', '__gt__', '__hash__', '__init__', '__init_subclass__', '__le__', '__lt__', '__ne__', '__new__', '__reduce__', '__reduce_ex__', '__repr__', '__setattr__', '__sizeof__', '__str__', '__subclasshook__', 'sample_addr', 'sample_cpu', 'sample_id', 'sample_ip', 'sample_period', 'sample_pid', 'sample_stream_id', 'sample_tid', 'sample_time', 'type'] ['__class__', '__delattr__', '__dir__', '__doc__', '__eq__', '__format__', '__ge__', '__getattribute__', '__getstate__', '__gt__', '__hash__', '__init__', '__init_subclass__', '__le__', '__lt__', '__ne__', '__new__', '__reduce__', '__reduce_ex__', '__repr__', '__setattr__', '__sizeof__', '__str__', '__subclasshook__', 'sample_addr', 'sample_cpu', 'sample_id', 'sample_ip', 'sample_period', 'sample_pid', 'sample_stream_id', 'sample_tid', 'sample_time', 'type'] ['__class__', '__delattr__', '__dir__', '__doc__', '__eq__', '__format__', '__ge__', '__getattribute__', '__getstate__', '__gt__', '__hash__', '__init__', '__init_subclass__', '__le__', '__lt__', '__ne__', '__new__', '__reduce__', '__reduce_ex__', '__repr__', '__setattr__', '__sizeof__', '__str__', '__subclasshook__', 'sample_addr', 'sample_cpu', 'sample_id', 'sample_ip', 'sample_period', 'sample_pid', 'sample_stream_id', 'sample_tid', 'sample_time', 'type'] ``` Also, add the ability to get the thread associated with a session. For threads, allow the comm string to be retrieved. This can be useful for filtering threads. Connect up some of the standard event handling in psession->tool to better support queries of the machine. Also connect up the symbols. Signed-off-by: Ian Rogers <irogers@google.com> Assisted-by: Gemini:gemini-3.1-pro-preview Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Alice Rogers <alice.mei.rogers@gmail.com> Cc: Dapeng Mi <dapeng1.mi@linux.intel.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: James Clark <james.clark@linaro.org> Cc: Leo Yan <leo.yan@linux.dev> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Richter <tmricht@linux.ibm.com> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> Signed-off-by: Namhyung Kim <namhyung@kernel.org>
2026-06-30perf python: Add wrapper for perf_data file abstractionIan Rogers
The perf_data struct is needed for session support. Signed-off-by: Ian Rogers <irogers@google.com> Assisted-by: Gemini:gemini-3.1-pro-preview Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Alice Rogers <alice.mei.rogers@gmail.com> Cc: Dapeng Mi <dapeng1.mi@linux.intel.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: James Clark <james.clark@linaro.org> Cc: Leo Yan <leo.yan@linux.dev> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Richter <tmricht@linux.ibm.com> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> Signed-off-by: Namhyung Kim <namhyung@kernel.org>
2026-06-30perf python: Use evsel in sample in pyrf_eventIan Rogers
Avoid a duplicated evsel by using the one in sample. Add evsel__get/put to the evsel in perf_sample. Signed-off-by: Ian Rogers <irogers@google.com> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Alice Rogers <alice.mei.rogers@gmail.com> Cc: Dapeng Mi <dapeng1.mi@linux.intel.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: James Clark <james.clark@linaro.org> Cc: Leo Yan <leo.yan@linux.dev> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Richter <tmricht@linux.ibm.com> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> Signed-off-by: Namhyung Kim <namhyung@kernel.org>
2026-06-30perf evlist: Add reference count checkingIan Rogers
Now the evlist is reference counted, add reference count checking so that gets and puts are paired and easy to debug. Reference count checking is documented here: https://perfwiki.github.io/main/reference-count-checking/ This large patch is adding accessors to evlist functions and switching to their use. There was some minor renaming as evlist__mmap is now an accessor to the mmap variable, and the original evlist__mmap is renamed to evlist__do_mmap. Signed-off-by: Ian Rogers <irogers@google.com> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Alice Rogers <alice.mei.rogers@gmail.com> Cc: Dapeng Mi <dapeng1.mi@linux.intel.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: James Clark <james.clark@linaro.org> Cc: Leo Yan <leo.yan@linux.dev> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Richter <tmricht@linux.ibm.com> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> Signed-off-by: Namhyung Kim <namhyung@kernel.org>
2026-06-30perf evsel: Add reference countIan Rogers
As with evlist this a no-op for most of the perf tool. The reference count is set to 1 at allocation, the put will see the 1, decrement it and perform the delete. The purpose for adding the reference count is for the python code. Prior to this change the python code would clone evsels, but this has issues if events are opened, etc. leading to assertion failures. With a reference count the same evsel can be used and the reference count incremented for the python usage. To not change the python evsel API getset functions are added for the evsel members, no set function is provided for size as it doesn't make sense to alter this. Signed-off-by: Ian Rogers <irogers@google.com> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Alice Rogers <alice.mei.rogers@gmail.com> Cc: Dapeng Mi <dapeng1.mi@linux.intel.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: James Clark <james.clark@linaro.org> Cc: Leo Yan <leo.yan@linux.dev> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Richter <tmricht@linux.ibm.com> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> Signed-off-by: Namhyung Kim <namhyung@kernel.org>
2026-06-30perf evlist: Add reference countIan Rogers
This a no-op for most of the perf tool. The reference count is set to 1 at allocation, the put will see the 1, decrement it and perform the delete. The purpose for adding the reference count is for the python code. Prior to this change the python code would clone evlists, but this has issues if events are opened, etc. This change adds a reference count for the evlists and a later change will add it to evsels. The combination is needed for the python code to operate correctly (not hit asserts in the evsel clone), but the changes are broken apart for the sake of smaller patches. Assisted-by: Gemini:gemini-3.1-pro-preview Signed-off-by: Ian Rogers <irogers@google.com> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Alice Rogers <alice.mei.rogers@gmail.com> Cc: Dapeng Mi <dapeng1.mi@linux.intel.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: James Clark <james.clark@linaro.org> Cc: Leo Yan <leo.yan@linux.dev> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Richter <tmricht@linux.ibm.com> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> Signed-off-by: Namhyung Kim <namhyung@kernel.org>
2026-06-30perf data: Add open flagIan Rogers
Avoid double opens and ensure only open files are closed. This addresses some issues with python integration where the data file wants to be opened before being given to a session. Assisted-by: Gemini:gemini-3.1-pro-preview Signed-off-by: Ian Rogers <irogers@google.com> Acked-by: Namhyung Kim <namhyung@kernel.org> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Alice Rogers <alice.mei.rogers@gmail.com> Cc: Dapeng Mi <dapeng1.mi@linux.intel.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: James Clark <james.clark@linaro.org> Cc: Leo Yan <leo.yan@linux.dev> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Richter <tmricht@linux.ibm.com> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> Signed-off-by: Namhyung Kim <namhyung@kernel.org>
2026-06-30perf evsel/evlist: Avoid unnecessary #includesIan Rogers
Use forward declarations and remove unnecessary #includes in evsel.h. Sort the forward declarations in evsel.h and evlist.h. Move some PMU code into evsel.c. Signed-off-by: Ian Rogers <irogers@google.com> Acked-by: Namhyung Kim <namhyung@kernel.org> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Alice Rogers <alice.mei.rogers@gmail.com> Cc: Dapeng Mi <dapeng1.mi@linux.intel.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: James Clark <james.clark@linaro.org> Cc: Leo Yan <leo.yan@linux.dev> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Richter <tmricht@linux.ibm.com> [ Add an include for pmu.h in util/aslr.h that was being obtained indirectly ] Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> Signed-off-by: Namhyung Kim <namhyung@kernel.org>
2026-06-30perf python: Add missed explicit dependenciesIan Rogers
Fix missing #include of pmus.h found while cleaning the evsel/evlist header files. Also define PY_SSIZE_T_CLEAN before including Python.h to comply with modern Python 3 C-API requirements, and introduce CHECK_INITIALIZED and CHECK_INITIALIZED_INT safety macros to be used by subsequent patches. Signed-off-by: Ian Rogers <irogers@google.com> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Alice Rogers <alice.mei.rogers@gmail.com> Cc: Dapeng Mi <dapeng1.mi@linux.intel.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: James Clark <james.clark@linaro.org> Cc: Leo Yan <leo.yan@linux.dev> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Richter <tmricht@linux.ibm.com> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> Signed-off-by: Namhyung Kim <namhyung@kernel.org>
2026-06-30perf util: Sort includes and add missed explicit dependenciesIan Rogers
Fix missing includes found while cleaning the evsel/evlist header files. Sort the remaining header files for consistency with the rest of the code. Signed-off-by: Ian Rogers <irogers@google.com> Acked-by: Namhyung Kim <namhyung@kernel.org> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Alice Rogers <alice.mei.rogers@gmail.com> Cc: Dapeng Mi <dapeng1.mi@linux.intel.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: James Clark <james.clark@linaro.org> Cc: Leo Yan <leo.yan@linux.dev> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Richter <tmricht@linux.ibm.com> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> Signed-off-by: Namhyung Kim <namhyung@kernel.org>
2026-06-30tools/sched_ext: use btf_vlen() helper in compat.hLiang Luo
__COMPAT_read_enum() and __COMPAT_struct_has_field() open-code the vlen lookup via the raw BTF_INFO_VLEN(t->info) UAPI macro. libbpf exposes btf_vlen() for exactly this purpose; use it in the three call sites, matching the pattern in kernel/bpf/inode.c and tools/bpf/bpftool. btf_vlen() returns __u32 (since commit cacd6729c0923, "libbpf: Adjust btf_vlen() to return a __u32", which expanded the BTF vlen field from 16 to 24 bits). Declare the loop counters as __u32 to match the return type, keeping the comparison as a plain '__u32 < __u32' and silencing the -Wsign-compare warnings. No functional change. Suggested-by: Andrea Righi <arighi@nvidia.com> Signed-off-by: Liang Luo <luoliang@kylinos.cn> Reviewed-by: Andrea Righi <arighi@nvidia.com> Signed-off-by: Tejun Heo <tj@kernel.org>
2026-06-29selftests: net: make busywait timeout clock portableNirmoy Das
loopy_wait() expects millisecond timestamps. However, Ubuntu Resolute can use uutils date, where `date -u +%s%3N` returns seconds plus full nanoseconds instead of a 3-digit millisecond field. This makes busywait expire too early and can make vlan_bridge_binding.sh read a stale operstate. Link: https://github.com/uutils/coreutils/issues/11658 Signed-off-by: Nirmoy Das <nirmoyd@nvidia.com> Link: https://patch.msgid.link/20260626144902.3214350-1-nirmoyd@nvidia.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2026-06-29selftests/cgroup: Adjust cpu test duration based on HZJoe Simmons-Talbott
For lower HZ values a quota of 1000us is much lower than the amount of microseconds per tick which makes the tests test_cpucg_max and test_cpugc_max_nested fail. Increase the test duration to accommodate for lower HZ values. Link: https://lore.kernel.org/lkml/20260625203307.1114538-1-joest@redhat.com/ Signed-off-by: Joe Simmons-Talbott <joest@redhat.com> Acked-by: Michal Koutný <mkoutny@suse.com> Signed-off-by: Tejun Heo <tj@kernel.org>
2026-06-29selftests/filesystems/overlayfs: test idmapped overlay mountsChristian Brauner
Add a selftest for idmapping the merged overlay mount itself. It applies an idmapping to a freshly created (still detached) overlay mount with mount_setattr(MOUNT_ATTR_IDMAP) and checks that: - getattr reports ownership mapped through the mount idmap; - a file created through the idmapped mount is stored on the upper layer with the corresponding overlay-final id; - chown through the idmapped mount round-trips; - an nfs_export overlay can be idmapped and decodable file handles round-trip through it with correctly mapped ownership. The layers live on a private tmpfs and are owned by the host id so that they map to id 0 through the test idmapping, allowing the root caller to operate on them. Link: https://patch.msgid.link/20260615-work-idmapped-overlayfs-v1-9-7381632aa402@kernel.org Reviewed-by: Amir Goldstein <amir73il@gmail.com> Signed-off-by: Christian Brauner (Amutable) <brauner@kernel.org>
2026-06-29selftests/filesystems/overlayfs: fix set_layers_via_fds link errorChristian Brauner
set_layers_via_fds.c calls open_tree() directly, but that wrapper is not provided by all C libraries, so the test fails to link with "undefined reference to open_tree" on toolchains without it. Use sys_open_tree() from ../wrappers.h, the syscall wrapper already used for move_mount(), fsmount() and friends here. This is also a prerequisite for building the new idmapped_mounts test added to this directory. Link: https://patch.msgid.link/20260615-work-idmapped-overlayfs-v1-8-7381632aa402@kernel.org Reviewed-by: Amir Goldstein <amir73il@gmail.com> Signed-off-by: Christian Brauner (Amutable) <brauner@kernel.org>
2026-06-29selftests/filesystems: add ustat() coverageChristian Brauner
user_get_super() is now backed by the global device-to-superblock table instead of a walk of the super_blocks list. ustat(2) is its most direct user-visible consumer but nothing in the tree exercises it. Add a small regression test: the device number of a mounted tmpfs (an anonymous device, registered in the table by sget_fc()) must resolve, it must stop resolving after the unmount (the entry is dropped again in kill_super_notify()), and bogus device numbers keep reporting EINVAL. The test passes on kernels before the conversion: it pins down the semantics the table-backed lookup must preserve. Link: https://patch.msgid.link/20260616-work-super-bdev_holder_global-v2-18-7df6b864028e@kernel.org Signed-off-by: Christian Brauner (Amutable) <brauner@kernel.org>
2026-06-29selftests/bpf: Add test for bpf_sock_read_xattr() kfuncChristian Brauner
Add a selftest that loads the kfunc in sleepable and non-sleepable lsm/socket_connect programs and checks that a value set via fsetxattr() on a socket is read back. Link: https://patch.msgid.link/20260617-work-bpf-sock-xattr-v1-2-a1276f7c9da3@kernel.org Reviewed-by: John Fastabend <john.fastabend@gmail.com> Signed-off-by: Christian Brauner (Amutable) <brauner@kernel.org>
2026-06-29selftests: proc: include fcntl.h in proc-pidnsAmin Vakil
proc-pidns.c uses open() and O_* flags, but does not include <fcntl.h>. This breaks the proc selftests build with errors such as: error: implicit declaration of function 'open' error: 'O_WRONLY' undeclared error: 'O_CREAT' undeclared error: 'O_RDONLY' undeclared Include <fcntl.h> to provide the declaration and flag definitions. Fixes: 5554d820f71c ("selftests/proc: add tests for new pidns APIs") Tested with: make -C tools/testing/selftests TARGETS=proc Signed-off-by: Amin Vakil <info@aminvakil.com> Link: https://patch.msgid.link/20260618151444.124739-1-info@aminvakil.com Signed-off-by: Christian Brauner (Amutable) <brauner@kernel.org>
2026-06-26tools/sched_ext: fix getopt() option variable signednessLiang Luo
Four example schedulers (scx_simple, scx_cpu0, scx_sdt, scx_userland) declare the variable that holds getopt()'s return value as __u32. getopt() returns int and uses -1 to mark end-of-options; storing that sentinel in an unsigned variable turns it into 0xffffffff, and the subsequent 'opt != -1' test only happens to keep working because both operands of != are promoted to the same 0xffffffff. Declare the variable as __s32 instead, matching getopt()'s actual contract and the style already used in scx_qmap.c (int opt) and scx_pair/central/flatcg.c (__s32 opt). This also silences the -Wsign-compare warnings emitted for the affected files. Signed-off-by: Liang Luo <luoliang@kylinos.cn> Signed-off-by: Tejun Heo <tj@kernel.org>
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