From patchwork Thu Sep 29 02:37:22 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jia He X-Patchwork-Id: 12993417 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 74078C32771 for ; Thu, 29 Sep 2022 02:38:33 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234853AbiI2Cic (ORCPT ); Wed, 28 Sep 2022 22:38:32 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:56814 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234813AbiI2CiM (ORCPT ); Wed, 28 Sep 2022 22:38:12 -0400 Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id E72FA125DA9; Wed, 28 Sep 2022 19:38:10 -0700 (PDT) Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 5022022EE; Wed, 28 Sep 2022 19:38:17 -0700 (PDT) Received: from entos-ampere-02.shanghai.arm.com (entos-ampere-02.shanghai.arm.com [10.169.212.212]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id 3164C3F73B; Wed, 28 Sep 2022 19:38:03 -0700 (PDT) From: Jia He To: Len Brown , James Morse , Tony Luck , Borislav Petkov , Mauro Carvalho Chehab , Robert Richter , Robert Moore , Qiuxu Zhuo , Yazen Ghannam , Jan Luebbe , Khuong Dinh , Kani Toshi Cc: Ard Biesheuvel , linux-acpi@vger.kernel.org, linux-kernel@vger.kernel.org, linux-edac@vger.kernel.org, devel@acpica.org, "Rafael J . Wysocki" , Shuai Xue , Jarkko Sakkinen , linux-efi@vger.kernel.org, nd@arm.com, Jia He Subject: [PATCH v7 4/8] ghes: Introduce a helper ghes_get_devices() Date: Thu, 29 Sep 2022 02:37:22 +0000 Message-Id: <20220929023726.73727-5-justin.he@arm.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20220929023726.73727-1-justin.he@arm.com> References: <20220929023726.73727-1-justin.he@arm.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-edac@vger.kernel.org Introduce a helper ghes_get_devices(), which returns the dev list GHES probed when the platform-check passes on the system. Suggested-by: Borislav Petkov Signed-off-by: Jia He --- drivers/acpi/apei/ghes.c | 37 +++++++++++++++++++++++++++++++++++++ include/acpi/ghes.h | 6 ++++++ 2 files changed, 43 insertions(+) diff --git a/drivers/acpi/apei/ghes.c b/drivers/acpi/apei/ghes.c index b0a6445c6da2..cc0588fe20f5 100644 --- a/drivers/acpi/apei/ghes.c +++ b/drivers/acpi/apei/ghes.c @@ -128,6 +128,9 @@ module_param_named(edac_force_enable, ghes_edac_force_enable, bool, 0); static LIST_HEAD(ghes_hed); static DEFINE_MUTEX(ghes_list_mutex); +static LIST_HEAD(ghes_devs); +static DEFINE_MUTEX(ghes_devs_mutex); + /* * Because the memory area used to transfer hardware error information * from BIOS to Linux can be determined only in NMI, IRQ or timer @@ -1388,6 +1391,10 @@ static int ghes_probe(struct platform_device *ghes_dev) ghes_edac_register(ghes, &ghes_dev->dev); + mutex_lock(&ghes_devs_mutex); + list_add_tail(&ghes->elist, &ghes_devs); + mutex_unlock(&ghes_devs_mutex); + /* Handle any pending errors right away */ spin_lock_irqsave(&ghes_notify_lock_irq, flags); ghes_proc(ghes); @@ -1452,6 +1459,10 @@ static int ghes_remove(struct platform_device *ghes_dev) ghes_edac_unregister(ghes); + mutex_lock(&ghes_devs_mutex); + list_del(&ghes->elist); + mutex_unlock(&ghes_devs_mutex); + kfree(ghes); platform_set_drvdata(ghes_dev, NULL); @@ -1508,6 +1519,32 @@ void __init acpi_ghes_init(void) pr_info(GHES_PFX "Failed to enable APEI firmware first mode.\n"); } +/* + * Known x86 systems that prefer GHES error reporting: + */ +static struct acpi_platform_list plat_list[] = { + {"HPE ", "Server ", 0, ACPI_SIG_FADT, all_versions}, + { } /* End */ +}; + +struct list_head *ghes_get_devices(void) +{ + int idx = -1; + + if (IS_ENABLED(CONFIG_X86)) { + idx = acpi_match_platform_list(plat_list); + if (idx < 0) { + if (!ghes_edac_force_enable) + return NULL; + + pr_warn_once("Force-loading ghes_edac on an unsupported platform. You're on your own!\n"); + } + } + + return &ghes_devs; +} +EXPORT_SYMBOL_GPL(ghes_get_devices); + void ghes_register_report_chain(struct notifier_block *nb) { atomic_notifier_chain_register(&ghes_report_chain, nb); diff --git a/include/acpi/ghes.h b/include/acpi/ghes.h index 5cbd38b6e4e1..46d9c86199e9 100644 --- a/include/acpi/ghes.h +++ b/include/acpi/ghes.h @@ -27,6 +27,8 @@ struct ghes { struct timer_list timer; unsigned int irq; }; + struct device *dev; + struct list_head elist; }; struct ghes_estatus_node { @@ -69,6 +71,10 @@ int ghes_register_vendor_record_notifier(struct notifier_block *nb); * @nb: pointer to the notifier_block structure of the vendor record handler. */ void ghes_unregister_vendor_record_notifier(struct notifier_block *nb); + +struct list_head *ghes_get_devices(void); +#else +static inline struct list_head *ghes_get_devices(void) { return NULL; } #endif int ghes_estatus_pool_init(int num_ghes);