From nobody Sun Sep 14 20:10:56 2025 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 48573C32793 for ; Wed, 18 Jan 2023 12:17:25 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230314AbjARMRR (ORCPT ); Wed, 18 Jan 2023 07:17:17 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:48318 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229840AbjARMQM (ORCPT ); Wed, 18 Jan 2023 07:16:12 -0500 Received: from galois.linutronix.de (Galois.linutronix.de [193.142.43.55]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 160628758D; Wed, 18 Jan 2023 03:37:56 -0800 (PST) Date: Wed, 18 Jan 2023 11:37:52 -0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020; t=1674041873; h=from:from:sender:sender:reply-to:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=QSBQjmprxmJ6gF/KpECzetkVPXzHi5/dVlzORSsydVQ=; b=3CvckGJdhl6RnuApVXP8sqokLN4fzWlAoG9aNQ8tVvQ3DnFFVwlTcYa1UpGG3fjWBSSpcX RiT7RHVJvELON7fld0qQwRUvBcjeo+cHglsy/oAvGizdkqbL26UTpLb39VLzFu0VQ+RwYn 5WASbQIRPc32Gf9n4dkB7DpJnsiMGmELn0sVTlMNiFfnhDUw2jYGZpK4dRFlVKEjtBsJCv kmX5GunDaPMNQGjuZq1MrtOiCa5CYGzLqT4hBjeUquuFN19bqs1sXXcZzMce3BPGuGoQi3 vhIDuAJs7hpj5DUW0WLEkjqPpgp+SgMjh8J2ERl8nMdapUcqruKex2aPzoloHQ== DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020e; t=1674041873; h=from:from:sender:sender:reply-to:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=QSBQjmprxmJ6gF/KpECzetkVPXzHi5/dVlzORSsydVQ=; b=Dy5B2l4TxiXc4rW6FLqCk5NEee96oWfaoaxEZG/hVIPvDg4oYDzhEWJ5eJgPjaegyFZRLj sbHnmakDgCuxd8CA== From: "tip-bot2 for Namhyung Kim" Sender: tip-bot2@linutronix.de Reply-to: linux-kernel@vger.kernel.org To: linux-tip-commits@vger.kernel.org Subject: [tip: perf/core] perf/core: Add perf_sample_save_raw_data() helper Cc: Peter Zijlstra , Namhyung Kim , Ingo Molnar , Jiri Olsa , x86@kernel.org, linux-kernel@vger.kernel.org In-Reply-To: <20230118060559.615653-4-namhyung@kernel.org> References: <20230118060559.615653-4-namhyung@kernel.org> MIME-Version: 1.0 Message-ID: <167404187259.4906.2207097655267396863.tip-bot2@tip-bot2> Robot-ID: Robot-Unsubscribe: Contact to get blacklisted from these emails Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org The following commit has been merged into the perf/core branch of tip: Commit-ID: 0a9081cf0a11770f6b0affd377db8caa3ec4c793 Gitweb: https://git.kernel.org/tip/0a9081cf0a11770f6b0affd377db8caa3= ec4c793 Author: Namhyung Kim AuthorDate: Tue, 17 Jan 2023 22:05:54 -08:00 Committer: Ingo Molnar CommitterDate: Wed, 18 Jan 2023 11:57:19 +01:00 perf/core: Add perf_sample_save_raw_data() helper When we save the raw_data to the perf sample data, we need to update the sample flags and the dynamic size. To make sure this is done consistently, add the perf_sample_save_raw_data() helper and convert all call sites. Suggested-by: Peter Zijlstra Signed-off-by: Namhyung Kim Signed-off-by: Ingo Molnar Tested-by: Jiri Olsa Acked-by: Jiri Olsa Acked-by: Peter Zijlstra Link: https://lore.kernel.org/r/20230118060559.615653-4-namhyung@kernel.org --- arch/s390/kernel/perf_cpum_cf.c | 4 +--- arch/s390/kernel/perf_pai_crypto.c | 4 +--- arch/s390/kernel/perf_pai_ext.c | 4 +--- arch/x86/events/amd/ibs.c | 3 +-- include/linux/perf_event.h | 33 ++++++++++++++++++++++++----- kernel/events/core.c | 31 ++++----------------------- kernel/trace/bpf_trace.c | 6 +---- 7 files changed, 39 insertions(+), 46 deletions(-) diff --git a/arch/s390/kernel/perf_cpum_cf.c b/arch/s390/kernel/perf_cpum_c= f.c index f043a7f..aa38649 100644 --- a/arch/s390/kernel/perf_cpum_cf.c +++ b/arch/s390/kernel/perf_cpum_cf.c @@ -662,9 +662,7 @@ static int cfdiag_push_sample(struct perf_event *event, if (event->attr.sample_type & PERF_SAMPLE_RAW) { raw.frag.size =3D cpuhw->usedss; raw.frag.data =3D cpuhw->stop; - raw.size =3D raw.frag.size; - data.raw =3D &raw; - data.sample_flags |=3D PERF_SAMPLE_RAW; + perf_sample_save_raw_data(&data, &raw); } =20 overflow =3D perf_event_overflow(event, &data, ®s); diff --git a/arch/s390/kernel/perf_pai_crypto.c b/arch/s390/kernel/perf_pai= _crypto.c index 985e243..a7b339c 100644 --- a/arch/s390/kernel/perf_pai_crypto.c +++ b/arch/s390/kernel/perf_pai_crypto.c @@ -362,9 +362,7 @@ static int paicrypt_push_sample(void) if (event->attr.sample_type & PERF_SAMPLE_RAW) { raw.frag.size =3D rawsize; raw.frag.data =3D cpump->save; - raw.size =3D raw.frag.size; - data.raw =3D &raw; - data.sample_flags |=3D PERF_SAMPLE_RAW; + perf_sample_save_raw_data(&data, &raw); } =20 overflow =3D perf_event_overflow(event, &data, ®s); diff --git a/arch/s390/kernel/perf_pai_ext.c b/arch/s390/kernel/perf_pai_ex= t.c index 1138f57..5555972 100644 --- a/arch/s390/kernel/perf_pai_ext.c +++ b/arch/s390/kernel/perf_pai_ext.c @@ -451,9 +451,7 @@ static int paiext_push_sample(void) if (event->attr.sample_type & PERF_SAMPLE_RAW) { raw.frag.size =3D rawsize; raw.frag.data =3D cpump->save; - raw.size =3D raw.frag.size; - data.raw =3D &raw; - data.sample_flags |=3D PERF_SAMPLE_RAW; + perf_sample_save_raw_data(&data, &raw); } =20 overflow =3D perf_event_overflow(event, &data, ®s); diff --git a/arch/x86/events/amd/ibs.c b/arch/x86/events/amd/ibs.c index 417c80b..6458295 100644 --- a/arch/x86/events/amd/ibs.c +++ b/arch/x86/events/amd/ibs.c @@ -1110,8 +1110,7 @@ fail: .data =3D ibs_data.data, }, }; - data.raw =3D &raw; - data.sample_flags |=3D PERF_SAMPLE_RAW; + perf_sample_save_raw_data(&data, &raw); } =20 if (perf_ibs =3D=3D &perf_ibs_op) diff --git a/include/linux/perf_event.h b/include/linux/perf_event.h index a941960..569dfac 100644 --- a/include/linux/perf_event.h +++ b/include/linux/perf_event.h @@ -95,6 +95,11 @@ struct perf_raw_record { u32 size; }; =20 +static __always_inline bool perf_raw_frag_last(const struct perf_raw_frag = *frag) +{ + return frag->pad < sizeof(u64); +} + /* * branch stack layout: * nr: number of taken branches stored in entries[] @@ -1182,6 +1187,29 @@ static inline void perf_sample_save_callchain(struct= perf_sample_data *data, data->sample_flags |=3D PERF_SAMPLE_CALLCHAIN; } =20 +static inline void perf_sample_save_raw_data(struct perf_sample_data *data, + struct perf_raw_record *raw) +{ + struct perf_raw_frag *frag =3D &raw->frag; + u32 sum =3D 0; + int size; + + do { + sum +=3D frag->size; + if (perf_raw_frag_last(frag)) + break; + frag =3D frag->next; + } while (1); + + size =3D round_up(sum + sizeof(u32), sizeof(u64)); + raw->size =3D size - sizeof(u32); + frag->pad =3D raw->size - sum; + + data->raw =3D raw; + data->dyn_size +=3D size; + data->sample_flags |=3D PERF_SAMPLE_RAW; +} + /* * Clear all bitfields in the perf_branch_entry. * The to and from fields are not cleared because they are @@ -1690,11 +1718,6 @@ extern void perf_restore_debug_store(void); static inline void perf_restore_debug_store(void) { } #endif =20 -static __always_inline bool perf_raw_frag_last(const struct perf_raw_frag = *frag) -{ - return frag->pad < sizeof(u64); -} - #define perf_output_put(handle, x) perf_output_copy((handle), &(x), sizeof= (x)) =20 struct perf_pmu_events_attr { diff --git a/kernel/events/core.c b/kernel/events/core.c index 12b7d51..17108a2 100644 --- a/kernel/events/core.c +++ b/kernel/events/core.c @@ -7581,30 +7581,10 @@ void perf_prepare_sample(struct perf_event_header *= header, if (filtered_sample_type & PERF_SAMPLE_CALLCHAIN) perf_sample_save_callchain(data, event, regs); =20 - if (sample_type & PERF_SAMPLE_RAW) { - struct perf_raw_record *raw =3D data->raw; - int size; - - if (raw && (data->sample_flags & PERF_SAMPLE_RAW)) { - struct perf_raw_frag *frag =3D &raw->frag; - u32 sum =3D 0; - - do { - sum +=3D frag->size; - if (perf_raw_frag_last(frag)) - break; - frag =3D frag->next; - } while (1); - - size =3D round_up(sum + sizeof(u32), sizeof(u64)); - raw->size =3D size - sizeof(u32); - frag->pad =3D raw->size - sum; - } else { - size =3D sizeof(u64); - data->raw =3D NULL; - } - - data->dyn_size +=3D size; + if (filtered_sample_type & PERF_SAMPLE_RAW) { + data->raw =3D NULL; + data->dyn_size +=3D sizeof(u64); + data->sample_flags |=3D PERF_SAMPLE_RAW; } =20 if (sample_type & PERF_SAMPLE_BRANCH_STACK) { @@ -10120,8 +10100,7 @@ void perf_tp_event(u16 event_type, u64 count, void = *record, int entry_size, }; =20 perf_sample_data_init(&data, 0, 0); - data.raw =3D &raw; - data.sample_flags |=3D PERF_SAMPLE_RAW; + perf_sample_save_raw_data(&data, &raw); =20 perf_trace_buf_update(record, event_type); =20 diff --git a/kernel/trace/bpf_trace.c b/kernel/trace/bpf_trace.c index 3bbd3f0..ad37608 100644 --- a/kernel/trace/bpf_trace.c +++ b/kernel/trace/bpf_trace.c @@ -687,8 +687,7 @@ BPF_CALL_5(bpf_perf_event_output, struct pt_regs *, reg= s, struct bpf_map *, map, } =20 perf_sample_data_init(sd, 0, 0); - sd->raw =3D &raw; - sd->sample_flags |=3D PERF_SAMPLE_RAW; + perf_sample_save_raw_data(sd, &raw); =20 err =3D __bpf_perf_event_output(regs, map, flags, sd); =20 @@ -746,8 +745,7 @@ u64 bpf_event_output(struct bpf_map *map, u64 flags, vo= id *meta, u64 meta_size, =20 perf_fetch_caller_regs(regs); perf_sample_data_init(sd, 0, 0); - sd->raw =3D &raw; - sd->sample_flags |=3D PERF_SAMPLE_RAW; + perf_sample_save_raw_data(sd, &raw); =20 ret =3D __bpf_perf_event_output(regs, map, flags, sd); out: