From nobody Sun Feb 8 20:32:44 2026 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 E3F9AC87FDE for ; Fri, 9 Jun 2023 04:32:55 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S238363AbjFIEcy (ORCPT ); Fri, 9 Jun 2023 00:32:54 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:44264 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229689AbjFIEcu (ORCPT ); Fri, 9 Jun 2023 00:32:50 -0400 Received: from mail-yb1-xb4a.google.com (mail-yb1-xb4a.google.com [IPv6:2607:f8b0:4864:20::b4a]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id E668B30EE for ; Thu, 8 Jun 2023 21:32:48 -0700 (PDT) Received: by mail-yb1-xb4a.google.com with SMTP id 3f1490d57ef6-ba8cf175f5bso5496779276.0 for ; Thu, 08 Jun 2023 21:32:48 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20221208; t=1686285168; x=1688877168; h=cc:to:from:subject:references:mime-version:message-id:in-reply-to :date:from:to:cc:subject:date:message-id:reply-to; bh=K6oRCwXAzzSsLjoJyJ6r/zwtsDdAY1vGn92p8AsarWw=; b=d3Ee3fZGjYLP9WKSxWYiUnxOI87dxEFHLN/O93FklZhWhUuqFJopThs5OZFaLkIT3S 1bqM0b3JeAPs9mkYlvvsfcfS0lSoEFKdnMraKt1V1MlcyKjCpTknWMSOJ/JVVKQYx7w1 j+AusEe4RTPVjaW9M3g8WiuGVqNFOnDOMefH0Masn3q36p1LqU4GJ137K7JLU0lfvlpL hkdaYSwiYoot+doO26no9dfhijb6eAAVq5/QQ7RTQACaCrVIWhiF05SXiz7RJlA3VRQ9 ArULx0sp6irqsg1xvqc4ySH1XJNxvpjY3nfPdcTXLf5wdGVW0kiYwquQiGfAQQniL04Z MPqQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1686285168; x=1688877168; h=cc:to:from:subject:references:mime-version:message-id:in-reply-to :date:x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=K6oRCwXAzzSsLjoJyJ6r/zwtsDdAY1vGn92p8AsarWw=; b=JxMHxKB/SKRKppp26to20KPk644QjORfo92lFrmE1c5k8gI/VrHRZkAuEXR2M51GO5 t4iLJnwCFANaCpNAb4UJLVsLi0n8jbG4Kx1nE9IXPt12olc2nXAjU2eaqw9Ro0NosBs5 /KMGJeg5N6ddKlZ3KvMarM0D8zmTMNRzL35DZ3Z6Lo6BkBMDVE3/LFA52AOlGFqfbuku TiMKbv9ANSl/PX9TgeiuZSOhaNRBm0pp5UU9+8+wtQg1Wo+ILP1Dw71DnhuyHC3+s1HC nriy+dqGWcmDR6+j1K2yiYyTLYzPwa1Ej1/NkvWvdW86uMQAnWCG74xUu+cr8ZylcyxZ o+SQ== X-Gm-Message-State: AC+VfDwgKrWaikGYmr39A/+l+MDuNoD/xHCmjABtvr0jMVvKiiGZbBo6 tYd/+nLnN7AGtSlexwVvGpuaIyjbHfNr X-Google-Smtp-Source: ACHHUZ7NpFHAyW1Yt9it4EMsBQDl+J1uSYI5e37+q8nQ0EnzyyQgQaKSAChKKHuTCQ4Ny3F0KwVBh4s9CI0/ X-Received: from irogers.svl.corp.google.com ([2620:15c:2d4:203:c3e5:ebc6:61e5:c73f]) (user=irogers job=sendgmr) by 2002:a25:8c07:0:b0:bad:2b06:da3 with SMTP id k7-20020a258c07000000b00bad2b060da3mr860012ybl.3.1686285168206; Thu, 08 Jun 2023 21:32:48 -0700 (PDT) Date: Thu, 8 Jun 2023 21:32:37 -0700 In-Reply-To: <20230609043240.43890-1-irogers@google.com> Message-Id: <20230609043240.43890-2-irogers@google.com> Mime-Version: 1.0 References: <20230609043240.43890-1-irogers@google.com> X-Mailer: git-send-email 2.41.0.162.gfafddb0af9-goog Subject: [PATCH v3 1/4] perf build: Add ability to build with a generated vmlinux.h From: Ian Rogers To: Peter Zijlstra , Ingo Molnar , Arnaldo Carvalho de Melo , Mark Rutland , Alexander Shishkin , Jiri Olsa , Namhyung Kim , Ian Rogers , Adrian Hunter , James Clark , Tiezhu Yang , Yang Jihong , linux-perf-users@vger.kernel.org, linux-kernel@vger.kernel.org, bpf@vger.kernel.org Cc: Andrii Nakryiko Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Commit a887466562b4 ("perf bpf skels: Stop using vmlinux.h generated from BTF, use subset of used structs + CO-RE") made it so that vmlinux.h was uncondtionally included from tools/perf/util/vmlinux.h. This change reverts part of that change (so that vmlinux.h is once again generated) and makes it so that the vmlinux.h used at build time is selected from the VMLINUX_H variable. By default the VMLINUX_H variable is set to the vmlinux.h added in change a887466562b4, but if GEN_VMLINUX_H=3D1 is passed on the build command line then the previous generation behavior kicks in. The build with GEN_VMLINUX_H=3D1 currently fails with: ``` util/bpf_skel/lock_contention.bpf.c:419:8: error: redefinition of 'rq' struct rq {}; ^ /tmp/perf/util/bpf_skel/.tmp/../vmlinux.h:45630:8: note: previous definitio= n is here struct rq { ^ 1 error generated. ``` Signed-off-by: Ian Rogers Acked-by: Andrii Nakryiko Acked-by: Jiri Olsa Acked-by: Namhyung Kim --- tools/perf/Makefile.config | 4 ++++ tools/perf/Makefile.perf | 16 +++++++++++++++- tools/perf/util/bpf_skel/.gitignore | 1 + tools/perf/util/bpf_skel/{ =3D> vmlinux}/vmlinux.h | 0 4 files changed, 20 insertions(+), 1 deletion(-) rename tools/perf/util/bpf_skel/{ =3D> vmlinux}/vmlinux.h (100%) diff --git a/tools/perf/Makefile.config b/tools/perf/Makefile.config index a794d9eca93d..08d4e7eaa721 100644 --- a/tools/perf/Makefile.config +++ b/tools/perf/Makefile.config @@ -680,6 +680,10 @@ ifdef BUILD_BPF_SKEL CFLAGS +=3D -DHAVE_BPF_SKEL endif =20 +ifndef GEN_VMLINUX_H + VMLINUX_H=3D$(src-perf)/util/bpf_skel/vmlinux/vmlinux.h +endif + dwarf-post-unwind :=3D 1 dwarf-post-unwind-text :=3D BUG =20 diff --git a/tools/perf/Makefile.perf b/tools/perf/Makefile.perf index f48794816d82..f1840af195c0 100644 --- a/tools/perf/Makefile.perf +++ b/tools/perf/Makefile.perf @@ -1080,7 +1080,21 @@ $(BPFTOOL): | $(SKEL_TMP_OUT) $(Q)CFLAGS=3D $(MAKE) -C ../bpf/bpftool \ OUTPUT=3D$(SKEL_TMP_OUT)/ bootstrap =20 -$(SKEL_TMP_OUT)/%.bpf.o: util/bpf_skel/%.bpf.c $(LIBBPF) | $(SKEL_TMP_OUT) +VMLINUX_BTF_PATHS ?=3D $(if $(O),$(O)/vmlinux) \ + $(if $(KBUILD_OUTPUT),$(KBUILD_OUTPUT)/vmlinux) \ + ../../vmlinux \ + /sys/kernel/btf/vmlinux \ + /boot/vmlinux-$(shell uname -r) +VMLINUX_BTF ?=3D $(abspath $(firstword $(wildcard $(VMLINUX_BTF_PATHS)))) + +$(SKEL_OUT)/vmlinux.h: $(VMLINUX_BTF) $(BPFTOOL) +ifeq ($(VMLINUX_H),) + $(QUIET_GEN)$(BPFTOOL) btf dump file $< format c > $@ +else + $(Q)cp "$(VMLINUX_H)" $@ +endif + +$(SKEL_TMP_OUT)/%.bpf.o: util/bpf_skel/%.bpf.c $(LIBBPF) $(SKEL_OUT)/vmlin= ux.h | $(SKEL_TMP_OUT) $(QUIET_CLANG)$(CLANG) -g -O2 -target bpf -Wall -Werror $(BPF_INCLUDE) $(= TOOLS_UAPI_INCLUDE) \ -c $(filter util/bpf_skel/%.bpf.c,$^) -o $@ =20 diff --git a/tools/perf/util/bpf_skel/.gitignore b/tools/perf/util/bpf_skel= /.gitignore index 7a1c832825de..cd01455e1b53 100644 --- a/tools/perf/util/bpf_skel/.gitignore +++ b/tools/perf/util/bpf_skel/.gitignore @@ -1,3 +1,4 @@ # SPDX-License-Identifier: GPL-2.0-only .tmp *.skel.h +vmlinux.h diff --git a/tools/perf/util/bpf_skel/vmlinux.h b/tools/perf/util/bpf_skel/= vmlinux/vmlinux.h similarity index 100% rename from tools/perf/util/bpf_skel/vmlinux.h rename to tools/perf/util/bpf_skel/vmlinux/vmlinux.h --=20 2.41.0.162.gfafddb0af9-goog From nobody Sun Feb 8 20:32:44 2026 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 B9B9FC8300C for ; 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Thu, 08 Jun 2023 21:32:50 -0700 (PDT) Date: Thu, 8 Jun 2023 21:32:38 -0700 In-Reply-To: <20230609043240.43890-1-irogers@google.com> Message-Id: <20230609043240.43890-3-irogers@google.com> Mime-Version: 1.0 References: <20230609043240.43890-1-irogers@google.com> X-Mailer: git-send-email 2.41.0.162.gfafddb0af9-goog Subject: [PATCH v3 2/4] perf bpf: Move the declaration of struct rq From: Ian Rogers To: Peter Zijlstra , Ingo Molnar , Arnaldo Carvalho de Melo , Mark Rutland , Alexander Shishkin , Jiri Olsa , Namhyung Kim , Ian Rogers , Adrian Hunter , James Clark , Tiezhu Yang , Yang Jihong , linux-perf-users@vger.kernel.org, linux-kernel@vger.kernel.org, bpf@vger.kernel.org Cc: Andrii Nakryiko Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" struct rq is defined in vmlinux.h when the vmlinux.h is generated, this causes a redefinition failure if it is declared in lock_contention.bpf.c. Move the definition to vmlinux.h for consistency with the generated version. Fixes: 760ebc45746b ("perf lock contention: Add empty 'struct rq' to satisf= y libbpf 'runqueue' type verification") Signed-off-by: Ian Rogers Acked-by: Andrii Nakryiko Acked-by: Jiri Olsa Acked-by: Namhyung Kim --- tools/perf/util/bpf_skel/lock_contention.bpf.c | 2 -- tools/perf/util/bpf_skel/vmlinux/vmlinux.h | 10 ++++++++++ 2 files changed, 10 insertions(+), 2 deletions(-) diff --git a/tools/perf/util/bpf_skel/lock_contention.bpf.c b/tools/perf/ut= il/bpf_skel/lock_contention.bpf.c index 1d48226ae75d..8d3cfbb3cc65 100644 --- a/tools/perf/util/bpf_skel/lock_contention.bpf.c +++ b/tools/perf/util/bpf_skel/lock_contention.bpf.c @@ -416,8 +416,6 @@ int contention_end(u64 *ctx) return 0; } =20 -struct rq {}; - extern struct rq runqueues __ksym; =20 struct rq___old { diff --git a/tools/perf/util/bpf_skel/vmlinux/vmlinux.h b/tools/perf/util/b= pf_skel/vmlinux/vmlinux.h index c7ed51b0c1ef..ab84a6e1da5e 100644 --- a/tools/perf/util/bpf_skel/vmlinux/vmlinux.h +++ b/tools/perf/util/bpf_skel/vmlinux/vmlinux.h @@ -171,4 +171,14 @@ struct bpf_perf_event_data_kern { struct perf_sample_data *data; struct perf_event *event; } __attribute__((preserve_access_index)); + +/* + * If 'struct rq' isn't defined for lock_contention.bpf.c, for the sake of + * rq___old and rq___new, then the type for the 'runqueue' variable ends up + * being a forward declaration (BTF_KIND_FWD) while the kernel has it defi= ned + * (BTF_KIND_STRUCT). The definition appears in vmlinux.h rather than + * lock_contention.bpf.c for consistency with a generated vmlinux.h. + */ +struct rq {}; + #endif // __VMLINUX_H --=20 2.41.0.162.gfafddb0af9-goog From nobody Sun Feb 8 20:32:44 2026 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 7BE25C8300C for ; Fri, 9 Jun 2023 04:33:05 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S238452AbjFIEdD (ORCPT ); Fri, 9 Jun 2023 00:33:03 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:44350 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S238151AbjFIEcz (ORCPT ); Fri, 9 Jun 2023 00:32:55 -0400 Received: from mail-yb1-xb49.google.com (mail-yb1-xb49.google.com [IPv6:2607:f8b0:4864:20::b49]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id DF5D230E4 for ; Thu, 8 Jun 2023 21:32:53 -0700 (PDT) Received: by mail-yb1-xb49.google.com with SMTP id 3f1490d57ef6-bad1c8dce48so1837202276.0 for ; Thu, 08 Jun 2023 21:32:53 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20221208; t=1686285173; x=1688877173; h=cc:to:from:subject:references:mime-version:message-id:in-reply-to :date:from:to:cc:subject:date:message-id:reply-to; bh=eip+GKzgi+H+UisiUsEsMTegbA5w4/cyYD2LTNMLb1c=; b=DJBFhRCz579eISTrwAKv+a4Sa4rt7TRv99gGYmUFbbDFN56KBekmWQj07fqgH7OGmb i5Ht2/fOJZ5U/vdJedjrHdwBv06oebCd+wVsn5/qYpyhBDJWOy4NqmSbeUcaJFWmxocT XwHrpUMLZ+BnN2JshnuB93vp2qOGo4yFS1TQkJhCdlVAqOlHk/Y+CD+ROWxaDfBCtWwS 1Kc6GAmU0q/Lfy6qaQzikMpAdYlzOo6b+/fjSd0UbYhFoo3uvb9WcqrAo+oqd+EtfmOl 1Vmf+yNRmR9CzDBhsuKNqNLjwQ3ycx+BcGXLAphN9wMOCcs+USVzwLzXc+i2rro6niJ5 zgVg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1686285173; x=1688877173; h=cc:to:from:subject:references:mime-version:message-id:in-reply-to :date:x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=eip+GKzgi+H+UisiUsEsMTegbA5w4/cyYD2LTNMLb1c=; b=f0YthWTOicka1sXD30LSQY6Rz3R6Hk6wxpRQCUZZUn6XYgYQHVrdBzYHy3YOY2FamL X46kVsyFOiQkTNcjO8WN7uR9lxhhhrfN8FkuLG3ARG0qpNWu8cj+wgbyVlgRkl6f1rRj hIGFN8RkvTuBq5j/tiuGOxr3jsNVk1Z1XCzpS5ogwVTQyPZtT/JIZpJ24DSDQOdnozua ZIhEd4Rv9aqZ1mxbTf3MohvHcoISH4sDts2ZCuRAN7mX9GrqZXvKT1dDwgb3krw1b9wZ seVRaKDd6hJh4Qww1CB1SrQilfU71MiBSWU6iMsWtvjHeSSAPSHXt55HjvjtMf6v56vz 7ADw== X-Gm-Message-State: AC+VfDwfGzau/264AsdMCMCmEulg5OXya8Avx7jy1LhcPLaz11BimchN xg5DT0mLxt3ciMGD9BDya1dPGHKboHEr X-Google-Smtp-Source: ACHHUZ7tu13JlWNPkPP1onH/w35dv0gMnF/OAMoeeHS8gt2OBtOOuDzW1wv9x6GnuTMhwVkeKtqW3KZ0Vk7T X-Received: from irogers.svl.corp.google.com ([2620:15c:2d4:203:c3e5:ebc6:61e5:c73f]) (user=irogers job=sendgmr) by 2002:a05:6902:4e5:b0:bac:f387:735b with SMTP id w5-20020a05690204e500b00bacf387735bmr60622ybs.13.1686285173182; Thu, 08 Jun 2023 21:32:53 -0700 (PDT) Date: Thu, 8 Jun 2023 21:32:39 -0700 In-Reply-To: <20230609043240.43890-1-irogers@google.com> Message-Id: <20230609043240.43890-4-irogers@google.com> Mime-Version: 1.0 References: <20230609043240.43890-1-irogers@google.com> X-Mailer: git-send-email 2.41.0.162.gfafddb0af9-goog Subject: [PATCH v3 3/4] perf test: Add build tests for BUILD_BPF_SKEL From: Ian Rogers To: Peter Zijlstra , Ingo Molnar , Arnaldo Carvalho de Melo , Mark Rutland , Alexander Shishkin , Jiri Olsa , Namhyung Kim , Ian Rogers , Adrian Hunter , James Clark , Tiezhu Yang , Yang Jihong , linux-perf-users@vger.kernel.org, linux-kernel@vger.kernel.org, bpf@vger.kernel.org Cc: Andrii Nakryiko Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Add tests with and without generating vmlinux.h. Signed-off-by: Ian Rogers Acked-by: Andrii Nakryiko Acked-by: Jiri Olsa Acked-by: Namhyung Kim --- tools/perf/tests/make | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/tools/perf/tests/make b/tools/perf/tests/make index 8dd3f8090352..775f374d9345 100644 --- a/tools/perf/tests/make +++ b/tools/perf/tests/make @@ -69,6 +69,8 @@ make_clean_all :=3D clean all make_python_perf_so :=3D $(python_perf_so) make_debug :=3D DEBUG=3D1 make_nondistro :=3D BUILD_NONDISTRO=3D1 +make_bpf_skel :=3D BUILD_BPF_SKEL=3D1 +make_gen_vmlinux_h :=3D BUILD_BPF_SKEL=3D1 GEN_VMLINUX_H=3D1 make_no_libperl :=3D NO_LIBPERL=3D1 make_no_libpython :=3D NO_LIBPYTHON=3D1 make_no_scripts :=3D NO_LIBPYTHON=3D1 NO_LIBPERL=3D1 @@ -136,6 +138,8 @@ endif run +=3D make_python_perf_so run +=3D make_debug run +=3D make_nondistro +run +=3D make_build_bpf_skel +run +=3D make_gen_vmlinux_h run +=3D make_no_libperl run +=3D make_no_libpython run +=3D make_no_scripts --=20 2.41.0.162.gfafddb0af9-goog From nobody Sun Feb 8 20:32:44 2026 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 B58F5C87FDC for ; Fri, 9 Jun 2023 04:33:20 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S238456AbjFIEdR (ORCPT ); Fri, 9 Jun 2023 00:33:17 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:44356 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S238431AbjFIEdC (ORCPT ); Fri, 9 Jun 2023 00:33:02 -0400 Received: from mail-yw1-x114a.google.com (mail-yw1-x114a.google.com [IPv6:2607:f8b0:4864:20::114a]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id E669D30F8 for ; Thu, 8 Jun 2023 21:32:56 -0700 (PDT) Received: by mail-yw1-x114a.google.com with SMTP id 00721157ae682-5655d99da53so30888517b3.0 for ; Thu, 08 Jun 2023 21:32:56 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20221208; t=1686285175; x=1688877175; h=to:from:subject:references:mime-version:message-id:in-reply-to:date :from:to:cc:subject:date:message-id:reply-to; bh=ASHCbqrtMwwghLa6ldqtFIr9DVtYxGlsru2IeiO0chg=; b=zI3WfmrJTWofT6Q5ncQ6jKrXFR1E3mo9Hit36AdOzyBeM6PnVVNbAQ0WNi65k/+zcA pR2aXpJwJaskgwdpY+kRv/hyUfkVL91tivrmkolRVBjmQdoGjBGJK8oZSBVLsoqMge2S m/lWXRXuPDMh/9dfkqwUN7EO5npxmr1P+sWYJUgYfC7vyvYirx7VbhA7HDJw1f+GYZ1K URTRPQTOWSQMbs0l9jWvaD1fHKYrDJLDjBvCQUkYBykXnnQniZAFVt+rref9n3kl/MF0 jAgELj+szWLc9gT7BHTUJeXYu9loowgmmr1rSX6Hfxtz8VUyMus1WO5K8VcaKT/GzcZQ nf8Q== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1686285175; x=1688877175; h=to:from:subject:references:mime-version:message-id:in-reply-to:date :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=ASHCbqrtMwwghLa6ldqtFIr9DVtYxGlsru2IeiO0chg=; b=helGB/met+1vk5tGhtklVfFZ/WLiVsRP26Bla/BuyLdGLu5hDqcVE5XKZc19eMfMeW xmOYsVQl3RUO8r1Z0dTK06T81km63Hc/onUxhfUeJXqWNmRKb7fRhBOYcMPSG9y2n1sX ufBDwKggbj19CMOkdtqFoOOMizSImANI9/+aTUhl0yHdjdl3bcEvj84UFwVgyqWsL7s/ q1deLywfp7Ou96NmVMdB5rboVYRt7IclU56bq04TmCo3Kk//ZJQEgNEuCiylEzBld1YH aJ1NdKrN/Y2tR9esfWYPXsBn9JZMYQz8IuIaO+V9YtjQ1uy80iu5JfLyVANGlQ9BAkkQ ORew== X-Gm-Message-State: AC+VfDzDJIKNfjBbBq/xovE3bHMbpCsr9ci63EOTw8VqBVbVwyKqv8Wq 6bE5JfFvfPHtSDXJPOHJ94Y3MIS8WZKM X-Google-Smtp-Source: ACHHUZ4iB6nP+HsqtQdFaFGqIVReKInr9ZAzZ0P6gBKiMmd7L9cSwiggbWzNxk1AoADQfIFADF2Se2xAo5yp X-Received: from irogers.svl.corp.google.com ([2620:15c:2d4:203:c3e5:ebc6:61e5:c73f]) (user=irogers job=sendgmr) by 2002:a81:ae59:0:b0:557:616:7d63 with SMTP id g25-20020a81ae59000000b0055706167d63mr538367ywk.1.1686285175731; Thu, 08 Jun 2023 21:32:55 -0700 (PDT) Date: Thu, 8 Jun 2023 21:32:40 -0700 In-Reply-To: <20230609043240.43890-1-irogers@google.com> Message-Id: <20230609043240.43890-5-irogers@google.com> Mime-Version: 1.0 References: <20230609043240.43890-1-irogers@google.com> X-Mailer: git-send-email 2.41.0.162.gfafddb0af9-goog Subject: [PATCH v3 4/4] perf build: Filter out BTF sources without a .BTF section From: Ian Rogers To: Peter Zijlstra , Ingo Molnar , Arnaldo Carvalho de Melo , Mark Rutland , Alexander Shishkin , Jiri Olsa , Namhyung Kim , Ian Rogers , Adrian Hunter , James Clark , Tiezhu Yang , Yang Jihong , linux-perf-users@vger.kernel.org, linux-kernel@vger.kernel.org, bpf@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" If generating vmlinux.h, make the code to generate it more tolerant by filtering out paths to kernels that lack a .BTF section. Signed-off-by: Ian Rogers Acked-by: Jiri Olsa Acked-by: Namhyung Kim --- tools/perf/Makefile.perf | 29 ++++++++++++++++++++++++++--- 1 file changed, 26 insertions(+), 3 deletions(-) diff --git a/tools/perf/Makefile.perf b/tools/perf/Makefile.perf index f1840af195c0..e440793fc6ca 100644 --- a/tools/perf/Makefile.perf +++ b/tools/perf/Makefile.perf @@ -193,6 +193,7 @@ FLEX ?=3D flex BISON ?=3D bison STRIP =3D strip AWK =3D awk +READELF ?=3D readelf =20 # include Makefile.config by default and rule out # non-config cases @@ -1080,12 +1081,34 @@ $(BPFTOOL): | $(SKEL_TMP_OUT) $(Q)CFLAGS=3D $(MAKE) -C ../bpf/bpftool \ OUTPUT=3D$(SKEL_TMP_OUT)/ bootstrap =20 -VMLINUX_BTF_PATHS ?=3D $(if $(O),$(O)/vmlinux) \ +# Paths to search for a kernel to generate vmlinux.h from. +VMLINUX_BTF_ELF_PATHS ?=3D $(if $(O),$(O)/vmlinux) \ $(if $(KBUILD_OUTPUT),$(KBUILD_OUTPUT)/vmlinux) \ ../../vmlinux \ - /sys/kernel/btf/vmlinux \ /boot/vmlinux-$(shell uname -r) -VMLINUX_BTF ?=3D $(abspath $(firstword $(wildcard $(VMLINUX_BTF_PATHS)))) + +# Paths to BTF information. +VMLINUX_BTF_BTF_PATHS ?=3D /sys/kernel/btf/vmlinux + +# Filter out kernels that don't exist or without a BTF section. +VMLINUX_BTF_ELF_ABSPATHS ?=3D $(abspath $(wildcard $(VMLINUX_BTF_ELF_PATHS= ))) +VMLINUX_BTF_PATHS ?=3D $(shell for file in $(VMLINUX_BTF_ELF_ABSPATHS); \ + do \ + if [ -f $$file ] && ($(READELF) -S "$$file" | grep -q .BTF); \ + then \ + echo "$$file"; \ + fi; \ + done) \ + $(wildcard $(VMLINUX_BTF_BTF_PATHS)) + +# Select the first as the source of vmlinux.h. +VMLINUX_BTF ?=3D $(firstword $(VMLINUX_BTF_PATHS)) + +ifeq ($(VMLINUX_H),) + ifeq ($(VMLINUX_BTF),) + $(error Missing bpftool input for generating vmlinux.h) + endif +endif =20 $(SKEL_OUT)/vmlinux.h: $(VMLINUX_BTF) $(BPFTOOL) ifeq ($(VMLINUX_H),) --=20 2.41.0.162.gfafddb0af9-goog