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 C313BCA0EDC for ; Thu, 21 Aug 2025 11:20:09 +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=4iWuJzzxP4gVw/2ZCfCXIAaNe6s3pd3DhFDuZCx99Fg=; b=QM2dESvtAB94X+XFhwZvgdyspn pbZRjkbkvJ3IxhMiQNB5lnR+qEzZYK4gqHX9T0GQiH6SRMSpggCjlLuERSfsGZYOK3PCCrJlNaqNz GmKPXqzJIkK2A4cOIjUYV0r+fHOTXORMa7DwBt8J9ryAvbtNJu9yTBonBRuxO2uQ6yd+U1LrGJEN4 DmFuH2qkRRXrLN+4laj5t2kktBNoi6zqvPwooU5QhtyZitRLfCRNlBdagnboQBw5WMyQd9fpT1QAX FgFkRlAfZpsdvvALGmcO2QLGwRjZWXMuFya73TLhlmyfZi6GgNHtlkSu/ayt2HL77jMw0QhLHnlEP jP1TyzJQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98.2 #2 (Red Hat Linux)) id 1up3Ks-0000000Gji9-2fI8; Thu, 21 Aug 2025 11:20:02 +0000 Received: from mail-wm1-x349.google.com ([2a00:1450:4864:20::349]) by bombadil.infradead.org with esmtps (Exim 4.98.2 #2 (Red Hat Linux)) id 1up0RN-0000000GCf7-3tEb for linux-arm-kernel@lists.infradead.org; Thu, 21 Aug 2025 08:14:35 +0000 Received: by mail-wm1-x349.google.com with SMTP id 5b1f17b1804b1-45a1b0caae1so3718085e9.3 for ; Thu, 21 Aug 2025 01:14:33 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20230601; t=1755764072; x=1756368872; 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=4iWuJzzxP4gVw/2ZCfCXIAaNe6s3pd3DhFDuZCx99Fg=; b=FYaA04OlMNRP0GhyGGpfJJRIuIehb/2EA3oxXX7dW3bNste7v44//ugwhvWOfhDZ52 SnrIHGzziynFWMm1GFxXaWVQpcJR2yOHXpGo9riOm66VYDZCA6Ri0J+F8uwO55YaN8XQ zZLpLX6FQKXvM5RQ6ocdaYnXC+SXg8UnuIeqCfAipU7CyVrkdzjTXAmHI05tXIiDTJA0 BLWVJRa9qa/Rzayam7iJpDDVGBTUqqJDRue/6II58ggipYLVnN4K8jbNNUs0HdfHKqc8 hX4cBep5ZBTHJsIRgJVSfBfWwz7BVKWilvTQlFvYyf7FQv3q5aoh72RRO2X0Z2FUajbb xyiQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1755764072; x=1756368872; 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=4iWuJzzxP4gVw/2ZCfCXIAaNe6s3pd3DhFDuZCx99Fg=; b=NyToWRnCOsN1hw8hQDSSqOzao6bka3zTF/3/cwJ/rKfjc5mkfvEm6UDz9lWKPFTaOo FkO2QQjeW2SvuuTrxyd3oISitShRJNGC6iAQjfdinl95/n1iCJcNCCgP/hN15mgxCfcK Chw3FpMft2ncTGssMclDq4SMRnkww5CEewASmnvRVDt2c9g6GksBzqM3IcwwxMrqTBnm 7sns1InFCnqEoszk5NjgdWUlw/kCSfGuTOb/cU6V2cZZinucwG5bMg6HwRQo7GzCg5v7 PlS7p30IvYgqf+hpfq3a07yvEvbM8CgWkYIIxNB6EJX+uEm5X3gnTYFHsq2/m8N1DFXM MZZQ== X-Forwarded-Encrypted: i=1; AJvYcCVS+kIr89oEB0OVybxkevxk5UaMD7Xe1OlQ7kw/j4IKdSl/M8JO+6SYNThMEp+4B5aUk+1TUaffw3g0PXR1HoU1@lists.infradead.org X-Gm-Message-State: AOJu0YzmK/h2SGhyH+7tchuFGTtd0SkVPIBOS8TL43daLbfHmHT5p+bc tllO6ssK3Ln4vZQkC5eamgaVzh4FV+micT/Ys3kX2wPq/HIDsqIAjSvezpzIFI6/4XdajULKMFM 5jRj6zuw+fSKyyU9/rMt5gw== X-Google-Smtp-Source: AGHT+IG4Q8cp6jOORVXZXkfWOgrpfZ0eZv6m/uotMvvZvAtj714DTAyhspN3LAAa+n5V+47jBjIVsqxX1AfiCyxk X-Received: from wmbhj7.prod.google.com ([2002:a05:600c:5287:b0:456:111e:4717]) (user=vdonnefort job=prod-delivery.src-stubby-dispatcher) by 2002:a05:600c:1390:b0:456:161c:3d77 with SMTP id 5b1f17b1804b1-45b4d7f786cmr15535985e9.16.1755764072496; Thu, 21 Aug 2025 01:14:32 -0700 (PDT) Date: Thu, 21 Aug 2025 09:13:56 +0100 In-Reply-To: <20250821081412.1008261-1-vdonnefort@google.com> Mime-Version: 1.0 References: <20250821081412.1008261-1-vdonnefort@google.com> X-Mailer: git-send-email 2.51.0.rc2.233.g662b1ed5c5-goog Message-ID: <20250821081412.1008261-9-vdonnefort@google.com> Subject: [PATCH v6 08/24] 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, aneesh.kumar@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-20250821_011433_971077_0B84618B X-CRM114-Status: GOOD ( 13.70 ) 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 a4449008a075..c8ae1e1f5e72 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) -- 2.51.0.rc2.233.g662b1ed5c5-goog