From patchwork Tue Apr 19 16:38:52 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Luck, Tony" X-Patchwork-Id: 12818800 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 CF930C43217 for ; Tue, 19 Apr 2022 16:39:17 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1354794AbiDSQl6 (ORCPT ); Tue, 19 Apr 2022 12:41:58 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:51018 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1354743AbiDSQly (ORCPT ); Tue, 19 Apr 2022 12:41:54 -0400 Received: from mga18.intel.com (mga18.intel.com [134.134.136.126]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id B2E7F15A3C; Tue, 19 Apr 2022 09:39:08 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1650386348; x=1681922348; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=v4WGCF2s5f5KuKam370PTpkZM1RS4K0r/UhQwRsUGzE=; b=E1tcpFe6vw2bIexL/9lB51PyBWvWcYilfcf9T6MDHEh3ElmHon1spcFC 0S6sNINV0qRzee/2pQm7pv5oMc7W6pD3IPnKgKXgOwfV7KWMGAepqn9Ay C2fzU9htqfKc3k4FREqnl+7F1LvqJQ1W2qAydycwsB1cDgRYYyAz78Hk0 iluawMprjKoJqSv5xASQxL8EA+AI/OG/oV8JHcZPjCTuxsKkch38AIZ3H W2lzLJpVuK9FowkGQhDD8EoQGpD6svXpIw6WZJ2xocA37QoPpq3SXhdz/ CVgQfm8X6wKgrfjKWys5tfa6sZ+ZMvg/ihEE4GHkat8Z4v4aMJeoNd/Lu g==; X-IronPort-AV: E=McAfee;i="6400,9594,10322"; a="245702528" X-IronPort-AV: E=Sophos;i="5.90,273,1643702400"; d="scan'208";a="245702528" Received: from orsmga007.jf.intel.com ([10.7.209.58]) by orsmga106.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 19 Apr 2022 09:39:07 -0700 X-IronPort-AV: E=Sophos;i="5.90,273,1643702400"; d="scan'208";a="554802139" Received: from agluck-desk3.sc.intel.com ([172.25.222.78]) by orsmga007-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 19 Apr 2022 09:39:07 -0700 From: Tony Luck To: hdegoede@redhat.com, markgross@kernel.org Cc: tglx@linutronix.de, mingo@redhat.com, bp@alien8.de, dave.hansen@linux.intel.com, x86@kernel.org, hpa@zytor.com, corbet@lwn.net, gregkh@linuxfoundation.org, andriy.shevchenko@linux.intel.com, jithu.joseph@intel.com, ashok.raj@intel.com, tony.luck@intel.com, rostedt@goodmis.org, dan.j.williams@intel.com, linux-kernel@vger.kernel.org, linux-doc@vger.kernel.org, platform-driver-x86@vger.kernel.org, patches@lists.linux.dev, ravi.v.shankar@intel.com Subject: [PATCH v3 04/11] platform/x86/intel/ifs: Add stub driver for In-Field Scan Date: Tue, 19 Apr 2022 09:38:52 -0700 Message-Id: <20220419163859.2228874-5-tony.luck@intel.com> X-Mailer: git-send-email 2.35.1 In-Reply-To: <20220419163859.2228874-1-tony.luck@intel.com> References: <20220407191347.9681-1-jithu.joseph@intel.com> <20220419163859.2228874-1-tony.luck@intel.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: platform-driver-x86@vger.kernel.org Cloud Service Providers that operate fleets of servers have reported [1] occasions where they can detect that a CPU has gone bad due to effects like electromigration, or isolated manufacturing defects. However, that detection method is A/B testing seemingly random application failures looking for a pattern. In-Field Scan (IFS) is a driver for a platform capability to load a crafted 'scan image' to run targeted low level diagnostics outside of the CPU's architectural error detection capabilities. [1]: https://www.youtube.com/watch?v=QMF3rqhjYuM Kconfig for this driver selects CONFIG_INTEL_IFS_DEVICE so the base kernel will be built with code to create the device to which this driver will attach. Reviewed-by: Dan Williams Signed-off-by: Tony Luck --- Not using module_platform_driver() for this simple stub because later patches need to add init()/exit() functions. --- drivers/platform/x86/intel/ifs/Kconfig | 14 ++++++++++++ drivers/platform/x86/intel/ifs/Makefile | 4 ++++ drivers/platform/x86/intel/ifs/core.c | 29 +++++++++++++++++++++++++ 3 files changed, 47 insertions(+) create mode 100644 drivers/platform/x86/intel/ifs/core.c diff --git a/drivers/platform/x86/intel/ifs/Kconfig b/drivers/platform/x86/intel/ifs/Kconfig index 51325b699563..0aa5ecc5ef42 100644 --- a/drivers/platform/x86/intel/ifs/Kconfig +++ b/drivers/platform/x86/intel/ifs/Kconfig @@ -1,2 +1,16 @@ config INTEL_IFS_DEVICE bool + +config INTEL_IFS + tristate "Intel In Field Scan" + depends on X86 && 64BIT && SMP + select INTEL_IFS_DEVICE + help + Enable support for the In Field Scan capability in select + CPUs. The capability allows for running low level tests via + a scan image distributed by Intel via Github to validate CPU + operation beyond baseline RAS capabilities. To compile this + driver as a module, choose M here. The module will be called + intel_ifs. + + If unsure, say N. diff --git a/drivers/platform/x86/intel/ifs/Makefile b/drivers/platform/x86/intel/ifs/Makefile index 12c2f5ce9925..bf8adc57892c 100644 --- a/drivers/platform/x86/intel/ifs/Makefile +++ b/drivers/platform/x86/intel/ifs/Makefile @@ -1 +1,5 @@ obj-$(CONFIG_INTEL_IFS_DEVICE) += intel_ifs_device.o + +obj-$(CONFIG_INTEL_IFS) += intel_ifs.o + +intel_ifs-objs := core.o diff --git a/drivers/platform/x86/intel/ifs/core.c b/drivers/platform/x86/intel/ifs/core.c new file mode 100644 index 000000000000..eb34b877dac0 --- /dev/null +++ b/drivers/platform/x86/intel/ifs/core.c @@ -0,0 +1,29 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* Copyright(c) 2022 Intel Corporation. */ + +#include +#include + +static struct platform_driver intel_ifs_driver = { + .driver = { + .name = "intel_ifs", + }, +}; + +static int __init ifs_init(void) +{ + return platform_driver_register(&intel_ifs_driver); +} + +static void __exit ifs_exit(void) +{ + platform_driver_unregister(&intel_ifs_driver); +} + +module_init(ifs_init); +module_exit(ifs_exit); + +MODULE_ALIAS("platform:intel_ifs*"); + +MODULE_LICENSE("GPL"); +MODULE_DESCRIPTION("Intel In Field Scan (IFS) driver");