Pull perf event updates from Ingo Molnar: "HW support updates: - Add uncore support for Intel Comet Lake - Add RAPL support for Hygon Fam18h - Add Intel "IIO stack to PMON mapping" support on Skylake-SP CPUs, which enumerates per device performance counters via sysfs and enables the perf stat --iiostat functionality - Add support for Intel "Architectural LBRs", which generalized the model specific LBR hardware tracing feature into a model-independent, architected performance monitoring feature. Usage is mostly seamless to tooling, as the pre-existing LBR features are kept, but there's a couple of advantages under the hood, such as faster context-switching, faster LBR reads, cleaner exposure of LBR features to guest kernels, etc. ( Since architectural LBRs are supported via XSAVE, there's related changes to the x86 FPU code as well. ) ftrace/perf updates: - Add support to add a text poke event to record changes to kernel text (i.e. self-modifying code) in order to support tracers like Intel PT decoding through jump labels, kprobes and ftrace trampolines. Misc cleanups, smaller fixes..." * tag 'perf-core-2020-08-03' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (47 commits) perf/x86/rapl: Add Hygon Fam18h RAPL support kprobes: Remove unnecessary module_mutex locking from kprobe_optimizer() x86/perf: Fix a typo perf: <linux/perf_event.h>: drop a duplicated word perf/x86/intel/lbr: Support XSAVES for arch LBR read perf/x86/intel/lbr: Support XSAVES/XRSTORS for LBR context switch x86/fpu/xstate: Add helpers for LBR dynamic supervisor feature x86/fpu/xstate: Support dynamic supervisor feature for LBR x86/fpu: Use proper mask to replace full instruction mask perf/x86: Remove task_ctx_size perf/x86/intel/lbr: Create kmem_cache for the LBR context data perf/core: Use kmem_cache to allocate the PMU specific data perf/core: Factor out functions to allocate/free the task_ctx_data perf/x86/intel/lbr: Support Architectural LBR perf/x86/intel/lbr: Factor out intel_pmu_store_lbr perf/x86/intel/lbr: Factor out rdlbr_all() and wrlbr_all() perf/x86/intel/lbr: Mark the {rd,wr}lbr_{to,from} wrappers __always_inline perf/x86/intel/lbr: Unify the stored format of LBR information perf/x86/intel/lbr: Support LBR_CTL perf/x86: Expose CPUID enumeration bits for arch LBR ...
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| @@ -383,7 +383,8 @@ struct perf_event_attr { · 382 unmodified lines | ||
| 383 | 383 | bpf_event : 1, /* include bpf events */ |
| 384 | 384 | aux_output : 1, /* generate AUX records instead of events */ |
| 385 | 385 | cgroup : 1, /* include cgroup events */ |
| 386 | − __reserved_1 : 31; | |
| 386 | + text_poke : 1, /* include text poke events */ | |
| 387 | + __reserved_1 : 30; | |
| 387 | 388 | |
| 388 | 389 | union { |
| 389 | 390 | __u32 wakeup_events; /* wakeup every n events */ |
| @@ -1041,12 +1042,35 @@ enum perf_event_type { · 651 unmodified lines | ||
| 1041 | 1042 | */ |
| 1042 | 1043 | PERF_RECORD_CGROUP = 19, |
| 1043 | 1044 | |
| 1045 | + /* | |
| 1046 | + * Records changes to kernel text i.e. self-modified code. 'old_len' is | |
| 1047 | + * the number of old bytes, 'new_len' is the number of new bytes. Either | |
| 1048 | + * 'old_len' or 'new_len' may be zero to indicate, for example, the | |
| 1049 | + * addition or removal of a trampoline. 'bytes' contains the old bytes | |
| 1050 | + * followed immediately by the new bytes. | |
| 1051 | + * | |
| 1052 | + * struct { | |
| 1053 | + * struct perf_event_header header; | |
| 1054 | + * u64 addr; | |
| 1055 | + * u16 old_len; | |
| 1056 | + * u16 new_len; | |
| 1057 | + * u8 bytes[]; | |
| 1058 | + * struct sample_id sample_id; | |
| 1059 | + * }; | |
| 1060 | + */ | |
| 1061 | + PERF_RECORD_TEXT_POKE = 20, | |
| 1062 | + | |
| 1044 | 1063 | PERF_RECORD_MAX, /* non-ABI */ |
| 1045 | 1064 | }; |
| 1046 | 1065 | |
| 1047 | 1066 | enum perf_record_ksymbol_type { |
| 1048 | 1067 | PERF_RECORD_KSYMBOL_TYPE_UNKNOWN = 0, |
| 1049 | 1068 | PERF_RECORD_KSYMBOL_TYPE_BPF = 1, |
| 1069 | + /* | |
| 1070 | + * Out of line code such as kprobe-replaced instructions or optimized | |
| 1071 | + * kprobes or ftrace trampolines. | |
| 1072 | + */ | |
| 1073 | + PERF_RECORD_KSYMBOL_TYPE_OOL = 2, | |
| 1050 | 1074 | PERF_RECORD_KSYMBOL_TYPE_MAX /* non-ABI */ |
| 1051 | 1075 | }; |
| 1052 | 1076 | |