From nobody Sun Dec 14 11:59:44 2025 Received: from mail-ed1-f44.google.com (mail-ed1-f44.google.com [209.85.208.44]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id A492131AF25 for ; Fri, 12 Dec 2025 15:32:55 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.208.44 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1765553577; cv=none; b=oWSgNjMWfK6mF016oib4nuzMso0iwy5VtZSX2oZzxT8Y8YqSA2IoGX+JopiMv7Q28u8dqSgHAAqIYg2IrK9K+deO8YZY8lLDNVwGc6bGaCH56g3hctOxaVb6ebdMhW/AqyA9icLc35ZgC5flON+Qd2LdUYv3nL6WECni8Bw3ZxA= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1765553577; c=relaxed/simple; bh=8Q916A0+2qqjGTKQxWQQu1Y/Kx5Q3rnxowSKrPOUypo=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=jKYrGAOIXPnGmLpZ8N7gF71KirHCpEFH76oLDEjxTDg6lXbBfhwg+YEa2KGV9xskNPdGIaWt19ClxuQ0XG8/sZ3+yKgkj3C306F7uoxtUK2UtFppJqokzNaZlh5JDcBxC3s5aRNckmJNZsUHpYYt8y+UnQwTTVtPgqZr3e43ftA= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linaro.org; spf=pass smtp.mailfrom=linaro.org; dkim=pass (2048-bit key) header.d=linaro.org header.i=@linaro.org header.b=PEt3C44o; arc=none smtp.client-ip=209.85.208.44 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linaro.org Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linaro.org Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=linaro.org header.i=@linaro.org header.b="PEt3C44o" Received: by mail-ed1-f44.google.com with SMTP id 4fb4d7f45d1cf-640ca678745so2533448a12.2 for ; Fri, 12 Dec 2025 07:32:55 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; t=1765553574; x=1766158374; darn=vger.kernel.org; h=cc:to:in-reply-to:references:message-id:content-transfer-encoding :mime-version:subject:date:from:from:to:cc:subject:date:message-id :reply-to; bh=3rYOutVV+nlrAeFTj6aX4/QG8Lfx2y/6jkTrJCZiYXg=; b=PEt3C44o4bd47o6oRrGUydNfJ0iGKAokMiE0cefIYCqh8OgArdZZiIML+cUh7tlTQv McOY73fjg6Byp0BvT7VeOffbP77xyq3gXaJNvZvvVGFjJ6EVK2V303Bn9bdkuT3j0yN7 jf+N+GPtNHRlhdMizLZMYkzpasxV5HSlrrr5ne8K9E3lgPHe3UUFlsua3+gwns4dXeYQ Fci3USAHWyhIWaQt7OadaemX5qwTdbP4CdebZ4Bswru3v1wGJ6UXecNxA5oHL0jGCpPc dvBc8YDOzIdSvMHOW6WUCf+410qkOBkQgx0cLQQNyWpZXiAw3a277pYGaoV4C7BbxXmC C/kQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1765553574; x=1766158374; h=cc:to:in-reply-to:references:message-id:content-transfer-encoding :mime-version:subject:date:from:x-gm-gg:x-gm-message-state:from:to :cc:subject:date:message-id:reply-to; bh=3rYOutVV+nlrAeFTj6aX4/QG8Lfx2y/6jkTrJCZiYXg=; b=jvUJuktwsk0qSoKKT2/SebunYrFjW9fSK9UyA6PpmGay1HPC2GiC/qkYpd5nzEP8BJ VsE2S+ti4svYFPHDIQ7i1GWnIv3Nf7YC1GJdNMbifAgW7mcHVWeZICJ/VNkW8VzDPwoE F/qyE1k2tW/lHBVMctzGdWfEkwiW0hzp1SVhMq2KquZ7lXC1Z8VB+Ah5aUZHo5KllfC0 NZZnnp+5LjiAbhXyZ9stHSVmOvhS9aabTRThyTQSOKZYC4hxQiWI3SFSAJvxC4WOvBii c+6jO34ht1FVtJECSqoIUbFgbvjb6F3MwDIova5EaLYHSF5+EUoCIXXWcRIi6YqTlYnu H9JQ== X-Forwarded-Encrypted: i=1; AJvYcCWLa4Iz/2c7YfiL6N8+MSa/A3WA+OUAeJ0ggT2LqDLPvgvSdyvKh2xWJpfdYUXLJsR0cludf/6rZMJSBS0=@vger.kernel.org X-Gm-Message-State: AOJu0YywxdPDA2sk3P3yuONToATys0J2SYVOqKY8IH6IJ5rONbIhnidy BJI9imY4AT1iOCzcniGRhYihaoPGIqaRWe3EwmyUYL0eMDmCS8uBEUM09e85myh3HLQ= X-Gm-Gg: AY/fxX4Ne3UigJ1fHduwY8kAFcxfnlh2x1Ve0dj0A/oOF7qjZy+Qqz+C2MDoeNDAjQz uviPmTJnxZyRHmIpe7pll8qLohxv7zSqJN5XVq0aRDwi2u4E7Dxdqym9Whubk445BKDlX7xZwfR PgC+UNpQtuRb3eeKTt9e/qSkODHFMOTsJFqFE0oGZ8+Xmku31b/c+HlyiUjuDyW11xda4xiHB9Y H6oB2rzopJRkbS9XqAE8gCIFRGz249PV1N0VMNw4y5A86zbecoU12uc0W6gMKCjXmvi06vV5C8m aogPCUC3rD/L1D3KkwAYQRL1lA8a8kRc2guHRcP9kIwxyj9oNKT7ZyiCyfLS4JLUlHnNSD1NzvM 4rnyMvPOnyM+5Zd53votp8ztqF5d5GEUYoTRVFbwcIM1sDBvTcNODzrO4gdHTRG9dMyYebX7AHM yzIiRaEYHNoi5bPUnP/MQy X-Google-Smtp-Source: AGHT+IHuBXF9wDV6j0xVcn3kE6xUIeXTjWm8gIVpYwkhI0QrZi9H7M2hxVZUiLHgfc5qp+HHWr/WGg== X-Received: by 2002:a05:6402:2114:b0:640:947e:70ce with SMTP id 4fb4d7f45d1cf-6499b12ff90mr2515331a12.5.1765553573963; Fri, 12 Dec 2025 07:32:53 -0800 (PST) Received: from e133063.arm.com ([130.185.218.160]) by smtp.gmail.com with ESMTPSA id 4fb4d7f45d1cf-6498210ed32sm5433234a12.29.2025.12.12.07.32.51 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 12 Dec 2025 07:32:53 -0800 (PST) From: James Clark Date: Fri, 12 Dec 2025 17:32:23 +0200 Subject: [PATCH v3 06/12] perf parse-events: Always track user config changes Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Message-Id: <20251212-james-perf-config-bits-v3-6-aa36a4846776@linaro.org> References: <20251212-james-perf-config-bits-v3-0-aa36a4846776@linaro.org> In-Reply-To: <20251212-james-perf-config-bits-v3-0-aa36a4846776@linaro.org> To: Peter Zijlstra , Ingo Molnar , Arnaldo Carvalho de Melo , Namhyung Kim , Mark Rutland , Alexander Shishkin , Jiri Olsa , Ian Rogers , Adrian Hunter , Suzuki K Poulose , Mike Leach , John Garry , Will Deacon , Leo Yan Cc: linux-perf-users@vger.kernel.org, linux-kernel@vger.kernel.org, coresight@lists.linaro.org, linux-arm-kernel@lists.infradead.org, James Clark X-Mailer: b4 0.14.2 Requiring the 'pmu->perf_event_attr_init_default' callback to be set to track user changes is a bit of a trap to fall in. It's hard to see that this is required when depending on the user change tracking. It's possible to want all 0 defaults so not set it, but at the same time still do some programmatic setting of configs with evsel__set_config_if_unset(). Also if a PMU reverts to 0 defaults and deletes its existing callback, it will silently break existing uses of evsel__set_config_if_unset(). One way to fix this would be to assert in evsel__set_config_if_unset() if the changes weren't tracked, but that would be a possibly untested runtime failure. Instead, always track it as it's harmless and simplifies testing too. Signed-off-by: James Clark --- tools/perf/util/parse-events.c | 8 ++------ 1 file changed, 2 insertions(+), 6 deletions(-) diff --git a/tools/perf/util/parse-events.c b/tools/perf/util/parse-events.c index 7ef63b808d0542999fd1303b9f94cae68e38030f..bee9233437753ff706d6b149503= a5e660c3972d8 100644 --- a/tools/perf/util/parse-events.c +++ b/tools/perf/util/parse-events.c @@ -1528,12 +1528,8 @@ static int parse_events_add_pmu(struct parse_events_= state *parse_state, return -ENOMEM; } =20 - /* - * When using default config, record which bits of attr->config were - * changed by the user. - */ - if (pmu->perf_event_attr_init_default && - get_config_chgs(pmu, &parsed_terms, &config_terms)) { + /* Record which bits of attr->config were changed by the user. */ + if (get_config_chgs(pmu, &parsed_terms, &config_terms)) { parse_events_terms__exit(&parsed_terms); return -ENOMEM; } --=20 2.34.1