From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from EUR05-AM6-obe.outbound.protection.outlook.com (mail-am6eur05on2063.outbound.protection.outlook.com [40.107.22.63]) by sourceware.org (Postfix) with ESMTPS id C16943858D20 for ; Mon, 8 Apr 2024 07:36:44 +0000 (GMT) DMARC-Filter: OpenDMARC Filter v1.4.2 sourceware.org C16943858D20 Authentication-Results: sourceware.org; dmarc=pass (p=none dis=none) header.from=arm.com Authentication-Results: sourceware.org; spf=pass smtp.mailfrom=arm.com ARC-Filter: OpenARC Filter v1.0.0 sourceware.org C16943858D20 Authentication-Results: server2.sourceware.org; arc=pass smtp.remote-ip=40.107.22.63 ARC-Seal: i=3; a=rsa-sha256; d=sourceware.org; s=key; t=1712561806; cv=pass; b=ewazrjILfG0GgQkW7Bzh/FkRcrgqVR8bo0qNK9FbXDFV0vPz9LcS6crkWHNA8F2+znu/NMoBGhIzZfs9a3loRxR0RgNNbSP7fsxVGyVBsj1pNOHFIR4hJLFyklt/eNH0PSFlS39ABUGLV7qKPE76CKaoJOBByxG2qdgYrxai/3M= ARC-Message-Signature: i=3; a=rsa-sha256; d=sourceware.org; s=key; t=1712561806; c=relaxed/simple; bh=RqIFbQfwhaZvZG+Lr1IwrtdTt+daaUOjyEeOpg+b9k8=; h=DKIM-Signature:DKIM-Signature:Date:From:To:Subject:Message-ID: MIME-Version; b=vwuEg703YJxcqbfbpl8x5P1EBfcObtTmRGt/hSCVzNCzeEzFoWLRJDByhkq3sR+Q0140/2l057gJ6faQox7tF7eZA9uwGt0ngl9RKqd/r4NX9YsYCa67Ggc91kDZVuZ49LSA9adQJ/nvcVOx3jM8ozM+YVf4l28CwiyUyrwaOzo= ARC-Authentication-Results: i=3; server2.sourceware.org ARC-Seal: i=2; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=pass; b=I1iI/VKiWtgyQjyQCVH7d8v4L8nxzCAu89vaGT5bWQsRxcsEDKdg0cR5E35BAplh9xTNp6ICnHkdfOqIEZxtLhIPQEVg+uz6rWpmVYoUw7CdJUoFxGqW1scKcl+B+dxw7/w8VCtj6c7n4M5m+DmBNIrgSNsSWIrJuv6fmeSnfM0XI2A0T9m3aSjyOsXBVbQ74J5PGGhy+OAVCb2cgot2Df1g6NbChVEBMOZfQbSuD1oRhaHnEk7jWaY3su6Yu+f1Y8RFr90r7NQtpCBvP4wAe3hEBZqy8ktNw5h8wlU5vdeH7yNTKvK+Jn+GfMn2kld4KVPoBrIKTz6iK+wu2V4WaQ== ARC-Message-Signature: i=2; a=rsa-sha256; c=relaxed/relaxed; d=microsoft.com; s=arcselector9901; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-AntiSpam-MessageData-ChunkCount:X-MS-Exchange-AntiSpam-MessageData-0:X-MS-Exchange-AntiSpam-MessageData-1; bh=GLMj/C5rYeZ3uH7YWg2SoJPHy/Gi7DShvDZw5NXO5KI=; b=O/WU7UWCZzDGKtTYDQfFD1uKx8hGaJRp5a4ThdtAuO4R6o5QW8SLL7OnZEK4Uok589AqHiKiNv4TbDxaNmr5Ut3d8pnxkR4MfJaYr4LbFt37MXZY8IJSni0yVtGpXabNcTtecTDbWNBPHKDvG1Hudpc27siABAi1qR5DUrGbEuV7upO4if4fmeV1dAofLpjOKEc5AUdduu36u63FX8VflRByCdwQEt8fC3vMdU4rV4h8Shiwg3ioNrQ/+8tzIBJfKSizBB1VF/ATs4GZhSl+N9PtF2N1GXNAC1AwS2+vYGtRi0bf3P4T9plZ+uUJjw2zI32r/Dutde58PkeGAR4jSw== ARC-Authentication-Results: i=2; mx.microsoft.com 1; spf=pass (sender ip is 63.35.35.123) smtp.rcpttodomain=sourceware.org smtp.mailfrom=arm.com; dmarc=pass (p=none sp=none pct=100) action=none header.from=arm.com; dkim=pass (signature was verified) header.d=armh.onmicrosoft.com; arc=pass (0 oda=1 ltdi=1 spf=[1,1,smtp.mailfrom=arm.com] dkim=[1,1,header.d=arm.com] dmarc=[1,1,header.from=arm.com]) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=armh.onmicrosoft.com; s=selector2-armh-onmicrosoft-com; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=GLMj/C5rYeZ3uH7YWg2SoJPHy/Gi7DShvDZw5NXO5KI=; b=7UIq1DOFq3AXoG6BjLg1HSJpcdXWpwb/kcxYxF2wPUEjfT9318DPcvqcEOVIaPwWs4F1J7NFcSLFr6NmboGqd7o+jx6zRZLuR6yD/dX+hbvu6NXsLxrgZ8cI/66fQtDcc+CIU9kfXSWt0/ocXH3nw4p7yZQwt+wB0fTeLwPkEyw= Received: from DU7P191CA0003.EURP191.PROD.OUTLOOK.COM (2603:10a6:10:54e::8) by DU0PR08MB9252.eurprd08.prod.outlook.com (2603:10a6:10:41b::19) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.7409.46; Mon, 8 Apr 2024 07:36:41 +0000 Received: from DB1PEPF000509E4.eurprd03.prod.outlook.com (2603:10a6:10:54e:cafe::3a) by DU7P191CA0003.outlook.office365.com (2603:10a6:10:54e::8) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.7452.35 via Frontend Transport; Mon, 8 Apr 2024 07:36:41 +0000 X-MS-Exchange-Authentication-Results: spf=pass (sender IP is 63.35.35.123) smtp.mailfrom=arm.com; dkim=pass (signature was verified) header.d=armh.onmicrosoft.com;dmarc=pass action=none header.from=arm.com; Received-SPF: Pass (protection.outlook.com: domain of arm.com designates 63.35.35.123 as permitted sender) receiver=protection.outlook.com; client-ip=63.35.35.123; helo=64aa7808-outbound-1.mta.getcheckrecipient.com; pr=C Received: from 64aa7808-outbound-1.mta.getcheckrecipient.com (63.35.35.123) by DB1PEPF000509E4.mail.protection.outlook.com (10.167.242.54) with Microsoft SMTP Server (version=TLS1_3, cipher=TLS_AES_256_GCM_SHA384) id 15.20.7452.22 via Frontend Transport; Mon, 8 Apr 2024 07:36:40 +0000 Received: ("Tessian outbound f0b355493f75:v300"); Mon, 08 Apr 2024 07:36:40 +0000 X-CheckRecipientChecked: true X-CR-MTA-CID: 82d68eee4ea494d8 X-CR-MTA-TID: 64aa7808 Received: from eba7bb58ff33.1 by 64aa7808-outbound-1.mta.getcheckrecipient.com id 5034BFFD-8C2E-4205-8142-BC8F8817C28F.1; Mon, 08 Apr 2024 07:36:34 +0000 Received: from EUR05-DB8-obe.outbound.protection.outlook.com by 64aa7808-outbound-1.mta.getcheckrecipient.com with ESMTPS id eba7bb58ff33.1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384); Mon, 08 Apr 2024 07:36:34 +0000 ARC-Seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none; b=fFKPbfU2oiKJ/ekmGFh5yUBcApiI5oFHzf21j/wojRWYxBEIsMMopVqYgrxim7ae5zJXlNR5VI3NRrSw2141onZOuAaoPPACJpDMe87R9lCTh0VT+Ugh/OSWA/KZH5zHiPiDO4qjW9SNTVNMOFYxg8PE+mUqnDA8ISrszO0orA6RhZpELsFvLRd6VQq+FEXa4U1gz81VajRpoU8ka3mGtrWWLCbYVs5Dtetvq/O2K6TiaLVEIlJGG09DnvxkTqiZyBpC/KvgStNzHkhDU20sjvozAx89+8gjh/gTwAMbkwTWKBlebIWvy8qACki6nlNb29q2ldPMyCZocdhF8hDjkw== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=microsoft.com; s=arcselector9901; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-AntiSpam-MessageData-ChunkCount:X-MS-Exchange-AntiSpam-MessageData-0:X-MS-Exchange-AntiSpam-MessageData-1; bh=GLMj/C5rYeZ3uH7YWg2SoJPHy/Gi7DShvDZw5NXO5KI=; b=QTasqYxuZP+DUxlycSodEUXrm6Yw3B5Dw+GIzWfZx1gJaPJNmLQsW5z17qU8hXhc0i/FTraRMYnLlWxiu6yMGFhm0YFnOSTRK4592t6vP4fmOIFh2G5XR5T/sQdRXSdu3YD4/O3jzlIp/A8xgwN6GgLBNrsL0yJbRKLiOXx6I6oVONc/q9XQvG/CGwrJ0oN1cv3ddBbPwUygvboZYDaZRTibITBFMvC6ZfgBnD0ija8SGV/fMF5t4fA0LyX+mv5pKVlSAQDLngVjI/CKvlxY4dNj4Vk2iBOltNg6BaRLivqHp/lXdNaaOevsQSoJVg9MGPYmvZ+bVGF4dqdyppvrYg== ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=pass smtp.mailfrom=arm.com; dmarc=pass action=none header.from=arm.com; dkim=pass header.d=arm.com; arc=none DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=armh.onmicrosoft.com; s=selector2-armh-onmicrosoft-com; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=GLMj/C5rYeZ3uH7YWg2SoJPHy/Gi7DShvDZw5NXO5KI=; b=7UIq1DOFq3AXoG6BjLg1HSJpcdXWpwb/kcxYxF2wPUEjfT9318DPcvqcEOVIaPwWs4F1J7NFcSLFr6NmboGqd7o+jx6zRZLuR6yD/dX+hbvu6NXsLxrgZ8cI/66fQtDcc+CIU9kfXSWt0/ocXH3nw4p7yZQwt+wB0fTeLwPkEyw= Received: from DB9PR08MB7179.eurprd08.prod.outlook.com (2603:10a6:10:2cc::19) by DB9PR08MB8290.eurprd08.prod.outlook.com (2603:10a6:10:3de::7) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.7409.46; Mon, 8 Apr 2024 07:36:28 +0000 Received: from DB9PR08MB7179.eurprd08.prod.outlook.com ([fe80::8c23:46ef:c2c9:ea91]) by DB9PR08MB7179.eurprd08.prod.outlook.com ([fe80::8c23:46ef:c2c9:ea91%4]) with mapi id 15.20.7409.042; Mon, 8 Apr 2024 07:36:28 +0000 Date: Mon, 8 Apr 2024 08:36:15 +0100 From: Szabolcs Nagy To: Florian Weimer Cc: libc-alpha@sourceware.org Subject: Re: [PATCH v3 3/3] aarch64: Enhanced CPU diagnostics for ld.so Message-ID: References: <87le5r273f.fsf@oldenburg.str.redhat.com> Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <87le5r273f.fsf@oldenburg.str.redhat.com> X-ClientProxiedBy: LO4P123CA0544.GBRP123.PROD.OUTLOOK.COM (2603:10a6:600:319::9) To DB9PR08MB7179.eurprd08.prod.outlook.com (2603:10a6:10:2cc::19) MIME-Version: 1.0 X-MS-TrafficTypeDiagnostic: DB9PR08MB7179:EE_|DB9PR08MB8290:EE_|DB1PEPF000509E4:EE_|DU0PR08MB9252:EE_ x-checkrecipientrouted: true NoDisclaimer: true X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam-Untrusted: BCL:0; X-Microsoft-Antispam-Message-Info-Original: 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 X-Forefront-Antispam-Report-Untrusted: CIP:255.255.255.255;CTRY:;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:DB9PR08MB7179.eurprd08.prod.outlook.com;PTR:;CAT:NONE;SFS:(13230031)(366007)(376005)(1800799015);DIR:OUT;SFP:1102; X-MS-Exchange-Transport-CrossTenantHeadersStamped: DB9PR08MB8290 X-EOPAttributedMessage: 0 X-MS-Exchange-Transport-CrossTenantHeadersStripped: DB1PEPF000509E4.eurprd03.prod.outlook.com X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-Correlation-Id: 5d5830df-583a-4028-40a0-08dc579ea15e X-Microsoft-Antispam: BCL:0; X-Microsoft-Antispam-Message-Info: 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 X-Forefront-Antispam-Report: CIP:63.35.35.123;CTRY:IE;LANG:en;SCL:1;SRV:;IPV:CAL;SFV:NSPM;H:64aa7808-outbound-1.mta.getcheckrecipient.com;PTR:ec2-63-35-35-123.eu-west-1.compute.amazonaws.com;CAT:NONE;SFS:(13230031)(82310400014)(36860700004)(376005)(1800799015);DIR:OUT;SFP:1101; X-OriginatorOrg: arm.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 08 Apr 2024 07:36:40.3525 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 5d5830df-583a-4028-40a0-08dc579ea15e X-MS-Exchange-CrossTenant-Id: f34e5979-57d9-4aaa-ad4d-b122a662184d X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=f34e5979-57d9-4aaa-ad4d-b122a662184d;Ip=[63.35.35.123];Helo=[64aa7808-outbound-1.mta.getcheckrecipient.com] X-MS-Exchange-CrossTenant-AuthSource: DB1PEPF000509E4.eurprd03.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: DU0PR08MB9252 X-Spam-Status: No, score=-5.4 required=5.0 tests=BAYES_00,DKIM_SIGNED,DKIM_VALID,FORGED_SPF_HELO,KAM_DMARC_NONE,RCVD_IN_MSPIKE_H2,SPF_HELO_PASS,SPF_NONE,TXREP,UNPARSEABLE_RELAY autolearn=no autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on server2.sourceware.org List-Id: The 04/05/2024 16:54, Florian Weimer wrote: > * Szabolcs Nagy: > > > The 04/05/2024 12:16, Florian Weimer wrote: > >> This prints some information from struct cpu_features, and the midr_el1 > >> and dczid_el0 system register contents on every CPU. > > > > thanks. > > > > i think we already rely on zva size to be the same across all cores > > (in memset) and i don't think linux allows different dczid_el0 per > > core (even if somebody built such a system). > > > > so i don't think that is needed. > > Well … we've seen per-core feature sets change on some cores after > suspend/resume (although not on aarch64). That's why we have t he > per-CPU iterator in the first place. linux does not support mismatch across cores and they check for it, so unless you resume after reboot with a different set of cpus online there should not be a mismatch. but if you think it is still useful just to be sure i'm not against printing it n times.