From mboxrd@z Thu Jan 1 00:00:00 1970 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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 1169FC3ABBE for ; Tue, 6 May 2025 22:23:57 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Content-Type:Cc:To:From: Subject:Message-ID:References:Mime-Version:In-Reply-To:Date:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=UccoAy7t6DYOqtAFght6GRLYbDtLDUJp2RBCqm6XV8E=; b=vbj0X/mac7sMO81IHV1Bdg6P4Y 2/ea0ZwkRWjiaE8fagBFmI6WweCXmr5vxrn9fLKPKNMW19r/i0xwfQ4fqzWJcGhZl/cniHA91Bxft 8r7kkp5mPakgXiEwKRBIY6YgHH7zjYagtd0uUAH1UOaAdBrlFm0ERpPFKrHZNMJw5OxT8ZZK/0yac EuSCSEnYHp3G8XbddD6FASGny3bRQUWTVJyBr5cf6t+kXjNj39fMBxPxAqPqyJRbokvIBkTvuJHS0 dYrXwmDPRpCV4p8CDVRo3gTfNUntjgAyelmKRVdqcTccsEDLt4N6GHbJLC7OWJdnrQdU9aGCcSUwD VIWy6xrg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98.2 #2 (Red Hat Linux)) id 1uCQhT-0000000DXkn-1oiT; Tue, 06 May 2025 22:23:43 +0000 Received: from mail-wr1-x449.google.com ([2a00:1450:4864:20::449]) by bombadil.infradead.org with esmtps (Exim 4.98.2 #2 (Red Hat Linux)) id 1uCLTQ-0000000CjrV-3wS0 for linux-arm-kernel@lists.infradead.org; Tue, 06 May 2025 16:48:54 +0000 Received: by mail-wr1-x449.google.com with SMTP id ffacd0b85a97d-3a0adce033bso330739f8f.2 for ; Tue, 06 May 2025 09:48:52 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20230601; t=1746550131; x=1747154931; darn=lists.infradead.org; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:from:to:cc:subject:date:message-id:reply-to; bh=UccoAy7t6DYOqtAFght6GRLYbDtLDUJp2RBCqm6XV8E=; b=cr3fO0lRcmC/zJja+PP2kcoepH739TFLGB42w5iIxFVKG95nX4FRvwO027juXhEU+S sf9l3/BsFIBJZsBLcRzS8JiwQaLaLFrKQ7WHSfd6C72bJKc9OyXV1qC7OCo9HqdIgkfJ aJDr1Tn5cvMrVnfphccfOqOkA/UI2bHR2Q5Bl21yiMEN9x7lZgVW3QWeCOwC5Yc/2fxv cMyZWu/luemOmOIBTODJDAJgsrV009XO2GDNUQ0EUK/XldE52wZ/ZbCnpuARJJMvimwj tGuNmWOVXKWJxGYi9ZyKwYxtjLstWUM60jziQgTSi0o8VM/6DmFt+huy9m+6wVu6VFc7 zT+w== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1746550131; x=1747154931; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=UccoAy7t6DYOqtAFght6GRLYbDtLDUJp2RBCqm6XV8E=; b=o3BcqqPeciQA3oO/XLjhw/kkM+oFG5lSNaId4xwsmwBMhYtmmLGDPgVwDExwgkSfuF CiXOmE//yOGNayHridf+7m3b/+GwnoMMw9/zaxCROudc+bZRt3mHQRBIYy0Bmw4CHMhW 1mq31gH4pZzCZTCGGhBgtBejOywSu30FMOoqQPs7lScF2uhNfI1iQy60SH2EOWieenUB K/Mq5vE+3LB0taDYtjwEgH2K59Rvh4a/riaE6LhVHMjpXIH4WwQIV1EyqPb7K/XQLdLi L7NujZE/ho3nC8NIEkLDCeci0JhFx/XmL1WYpyiIVW2pebU5yOYNY3zVbRSrd3bkOLNt rYgA== X-Forwarded-Encrypted: i=1; AJvYcCX2QNe+/HXI8C5q4I4xqVB13FqVM4F95hRNLKqQ7MNPljyjf/EDAkEX2Wq+HN2jW0Ydg0lW9GwQ78uNLeEabtuK@lists.infradead.org X-Gm-Message-State: AOJu0Yx7QHU8fspHv7iZMBpUxuSuKzE8IspBaXxGR7tWgeQWx1a1L7qX fG3LrYYUj9w2Rwt12u/ROCvJxMYsNT4IlJfiSkKAUjHn5n/u8ZVLUnvmS5CjMSMd83T3UYIWD7E d4SkOTu0JYS4UloOMLg== X-Google-Smtp-Source: AGHT+IEM95jiwlSfZQ54wnNuqC2fl6D7aBnxwDMPr9V7cIV+4uN83c8dv1x96zRkvBxrXCRdBy2/bVIFl9Y7AHEs X-Received: from wmbek12.prod.google.com ([2002:a05:600c:3ecc:b0:440:5e01:286b]) (user=vdonnefort job=prod-delivery.src-stubby-dispatcher) by 2002:a05:6000:2a6:b0:3a0:86b0:5f63 with SMTP id ffacd0b85a97d-3a0b49e5583mr173846f8f.34.1746550131142; Tue, 06 May 2025 09:48:51 -0700 (PDT) Date: Tue, 6 May 2025 17:48:03 +0100 In-Reply-To: <20250506164820.515876-1-vdonnefort@google.com> Mime-Version: 1.0 References: <20250506164820.515876-1-vdonnefort@google.com> X-Mailer: git-send-email 2.49.0.967.g6a0df3ecc3-goog Message-ID: <20250506164820.515876-8-vdonnefort@google.com> Subject: [PATCH v4 07/24] tracing: Add helpers to create trace remote events From: Vincent Donnefort To: rostedt@goodmis.org, mhiramat@kernel.org, mathieu.desnoyers@efficios.com, linux-trace-kernel@vger.kernel.org, maz@kernel.org, oliver.upton@linux.dev, joey.gouly@arm.com, suzuki.poulose@arm.com, yuzenghui@huawei.com Cc: kvmarm@lists.linux.dev, linux-arm-kernel@lists.infradead.org, jstultz@google.com, qperret@google.com, will@kernel.org, kernel-team@android.com, linux-kernel@vger.kernel.org, Vincent Donnefort Content-Type: text/plain; charset="UTF-8" X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20250506_094852_976210_9C5FEBF6 X-CRM114-Status: GOOD ( 13.47 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Declaring remote events can be cumbersome let's add a set of macros to simplify developers life. The declaration of a remote event is very similar to kernel's events: REMOTE_EVENT(name, id, RE_STRUCT( re_field(u64 foo) ), RE_PRINTK("foo=%llu", __entry->foo) ) Signed-off-by: Vincent Donnefort diff --git a/include/linux/trace_remote_event.h b/include/linux/trace_remote_event.h index 621c5dff0664..d00e85d2a633 100644 --- a/include/linux/trace_remote_event.h +++ b/include/linux/trace_remote_event.h @@ -5,6 +5,7 @@ struct trace_remote; struct trace_event_fields; +struct trace_seq; struct remote_event_hdr { unsigned short id; @@ -20,4 +21,13 @@ struct remote_event { char *print_fmt; void (*print)(void *evt, struct trace_seq *seq); }; + +#define RE_STRUCT(__args...) __args +#define re_field(__type, __field) __type __field; + +#define REMOTE_EVENT_FORMAT(__name, __struct) \ + struct remote_event_format_##__name { \ + struct remote_event_hdr hdr; \ + __struct \ + } #endif diff --git a/include/trace/define_remote_events.h b/include/trace/define_remote_events.h new file mode 100644 index 000000000000..03c9f5515c5a --- /dev/null +++ b/include/trace/define_remote_events.h @@ -0,0 +1,73 @@ +/* SPDX-License-Identifier: GPL-2.0 */ + +#include +#include +#include +#include + +#define REMOTE_EVENT_INCLUDE(__file) __stringify(../../__file) + +#ifdef REMOTE_EVENT_SECTION +# define __REMOTE_EVENT_SECTION(__name) __used __section(REMOTE_EVENT_SECTION"."#__name) +#else +# define __REMOTE_EVENT_SECTION(__name) +#endif + +#define __REMOTE_PRINTK_COUNT_ARGS(_0, _1, _2, _n, __args...) _n +#define REMOTE_PRINTK_COUNT_ARGS(__args...) __REMOTE_PRINTK_COUNT_ARGS(, ##__args, 2, 1, 0) + +#define __remote_printk0() \ + trace_seq_putc(seq, '\n') + +#define __remote_printk1(__fmt) \ + trace_seq_puts(seq, " " __fmt "\n") \ + +#define __remote_printk2(__fmt, __args...) \ +do { \ + trace_seq_putc(seq, ' '); \ + trace_seq_printf(seq, __fmt, __args); \ + trace_seq_putc(seq, '\n'); \ +} while (0) + +/* Apply the appropriate trace_seq sequence according to the number of arguments */ +#define remote_printk(__args...) \ + CONCATENATE(__remote_printk, REMOTE_PRINTK_COUNT_ARGS(__args))(__args) + +#define RE_PRINTK(__args...) __args + +#define REMOTE_EVENT(__name, __id, __struct, __printk) \ + REMOTE_EVENT_FORMAT(__name, __struct); \ + static void remote_event_print_##__name(void *evt, struct trace_seq *seq) \ + { \ + struct remote_event_format_##__name __maybe_unused *__entry = evt; \ + trace_seq_puts(seq, #__name); \ + remote_printk(__printk); \ + } +#include REMOTE_EVENT_INCLUDE(REMOTE_EVENT_INCLUDE_FILE) + +#undef REMOTE_EVENT +#undef RE_PRINTK +#undef re_field +#define re_field(__type, __field) \ + { \ + .type = #__type, .name = #__field, \ + .size = sizeof(__type), .align = __alignof__(__type), \ + .is_signed = is_signed_type(__type), \ + }, +#define __entry REC +#define RE_PRINTK(__fmt, __args...) "\"" __fmt "\", " __stringify(__args) +#define REMOTE_EVENT(__name, __id, __struct, __printk) \ + static struct trace_event_fields remote_event_fields_##__name[] = { \ + __struct \ + {} \ + }; \ + static char remote_event_print_fmt_##__name[] = __printk; \ + static struct remote_event __REMOTE_EVENT_SECTION(__name) \ + remote_event_##__name = { \ + .name = #__name, \ + .id = __id, \ + .fields = remote_event_fields_##__name, \ + .print_fmt = remote_event_print_fmt_##__name, \ + .print = remote_event_print_##__name, \ + } +#include REMOTE_EVENT_INCLUDE(REMOTE_EVENT_INCLUDE_FILE) -- 2.49.0.967.g6a0df3ecc3-goog