From patchwork Fri Nov 10 19:54:06 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dongjiu Geng X-Patchwork-Id: 10053007 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 891DF6032D for ; Fri, 10 Nov 2017 11:52:01 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 8882429A2F for ; Fri, 10 Nov 2017 11:52:01 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 7D5342B13F; Fri, 10 Nov 2017 11:52:01 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-5.0 required=2.0 tests=BAYES_00, DATE_IN_FUTURE_06_12, RCVD_IN_DNSWL_HI autolearn=unavailable version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 1676029A2F for ; Fri, 10 Nov 2017 11:52:01 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753188AbdKJLvH (ORCPT ); Fri, 10 Nov 2017 06:51:07 -0500 Received: from szxga04-in.huawei.com ([45.249.212.190]:10448 "EHLO szxga04-in.huawei.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753262AbdKJLtc (ORCPT ); Fri, 10 Nov 2017 06:49:32 -0500 Received: from 172.30.72.58 (EHLO DGGEMS401-HUB.china.huawei.com) ([172.30.72.58]) by dggrg04-dlp.huawei.com (MOS 4.4.6-GA FastPath queued) with ESMTP id DKO50295; Fri, 10 Nov 2017 19:49:26 +0800 (CST) Received: from localhost.localdomain (10.143.28.90) by DGGEMS401-HUB.china.huawei.com (10.3.19.201) with Microsoft SMTP Server id 14.3.361.1; Fri, 10 Nov 2017 19:48:20 +0800 From: Dongjiu Geng To: , , , , , , , , , , , , , , , , , , , , Subject: [PATCH v8 3/7] acpi: apei: Add SEI notification type support for ARMv8 Date: Sat, 11 Nov 2017 03:54:06 +0800 Message-ID: <1510343650-23659-4-git-send-email-gengdongjiu@huawei.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1510343650-23659-1-git-send-email-gengdongjiu@huawei.com> References: <1510343650-23659-1-git-send-email-gengdongjiu@huawei.com> MIME-Version: 1.0 X-Originating-IP: [10.143.28.90] X-CFilter-Loop: Reflected X-Mirapoint-Virus-RAPID-Raw: score=unknown(0), refid=str=0001.0A020205.5A059246.00EE, ss=1, re=0.000, recu=0.000, reip=0.000, cl=1, cld=1, fgs=0, ip=0.0.0.0, so=2014-11-16 11:51:01, dmn=2013-03-21 17:37:32 X-Mirapoint-Loop-Id: 594ca8de7da8dac79696063e80f43dd3 Sender: linux-acpi-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-acpi@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP ARMv8.2 requires implementation of the RAS extension, in this extension it adds SEI(SError Interrupt) notification type, this patch adds new GHES error source SEI handling functions. This error source parsing and handling method is similar with the SEA. Expose API ghes_notify_sei() to external users. External modules can call this exposed API to parse APEI table and handle the SEI notification. Signed-off-by: Dongjiu Geng --- drivers/acpi/apei/Kconfig | 15 ++++++++++++++ drivers/acpi/apei/ghes.c | 53 +++++++++++++++++++++++++++++++++++++++++++++++ include/acpi/ghes.h | 1 + 3 files changed, 69 insertions(+) diff --git a/drivers/acpi/apei/Kconfig b/drivers/acpi/apei/Kconfig index 52ae543..ff4afc3 100644 --- a/drivers/acpi/apei/Kconfig +++ b/drivers/acpi/apei/Kconfig @@ -55,6 +55,21 @@ config ACPI_APEI_SEA option allows the OS to look for such hardware error record, and take appropriate action. +config ACPI_APEI_SEI + bool "APEI SError(System Error) Interrupt logging/recovering support" + depends on ARM64 && ACPI_APEI_GHES + default y + help + This option should be enabled if the system supports + firmware first handling of SEI (SError interrupt). + + SEI happens with asynchronous external abort for errors on device + memory reads on ARMv8 systems. If a system supports firmware first + handling of SEI, the platform analyzes and handles hardware error + notifications from SEI, and it may then form a hardware error record for + the OS to parse and handle. This option allows the OS to look for + such hardware error record, and take appropriate action. + config ACPI_APEI_MEMORY_FAILURE bool "APEI memory error recovering support" depends on ACPI_APEI && MEMORY_FAILURE diff --git a/drivers/acpi/apei/ghes.c b/drivers/acpi/apei/ghes.c index 6a3f824..67cd3a7 100644 --- a/drivers/acpi/apei/ghes.c +++ b/drivers/acpi/apei/ghes.c @@ -855,6 +855,46 @@ static inline void ghes_sea_add(struct ghes *ghes) { } static inline void ghes_sea_remove(struct ghes *ghes) { } #endif /* CONFIG_ACPI_APEI_SEA */ +#ifdef CONFIG_ACPI_APEI_SEI +static LIST_HEAD(ghes_sei); + +/* + * Return 0 only if one of the SEI error sources successfully reported an error + * record sent from the firmware. + */ +int ghes_notify_sei(void) +{ + struct ghes *ghes; + int ret = -ENOENT; + + rcu_read_lock(); + list_for_each_entry_rcu(ghes, &ghes_sei, list) { + if (!ghes_proc(ghes)) + ret = 0; + } + rcu_read_unlock(); + return ret; +} + +static void ghes_sei_add(struct ghes *ghes) +{ + mutex_lock(&ghes_list_mutex); + list_add_rcu(&ghes->list, &ghes_sei); + mutex_unlock(&ghes_list_mutex); +} + +static void ghes_sei_remove(struct ghes *ghes) +{ + mutex_lock(&ghes_list_mutex); + list_del_rcu(&ghes->list); + mutex_unlock(&ghes_list_mutex); + synchronize_rcu(); +} +#else /* CONFIG_ACPI_APEI_SEI */ +static inline void ghes_sei_add(struct ghes *ghes) { } +static inline void ghes_sei_remove(struct ghes *ghes) { } +#endif /* CONFIG_ACPI_APEI_SEI */ + #ifdef CONFIG_HAVE_ACPI_APEI_NMI /* * printk is not safe in NMI context. So in NMI handler, we allocate @@ -1086,6 +1126,13 @@ static int ghes_probe(struct platform_device *ghes_dev) goto err; } break; + case ACPI_HEST_NOTIFY_SEI: + if (!IS_ENABLED(CONFIG_ACPI_APEI_SEI)) { + pr_warn(GHES_PFX "Generic hardware error source: %d notified via SEI is not supported!\n", + generic->header.source_id); + goto err; + } + break; case ACPI_HEST_NOTIFY_NMI: if (!IS_ENABLED(CONFIG_HAVE_ACPI_APEI_NMI)) { pr_warn(GHES_PFX "Generic hardware error source: %d notified via NMI interrupt is not supported!\n", @@ -1158,6 +1205,9 @@ static int ghes_probe(struct platform_device *ghes_dev) case ACPI_HEST_NOTIFY_SEA: ghes_sea_add(ghes); break; + case ACPI_HEST_NOTIFY_SEI: + ghes_sei_add(ghes); + break; case ACPI_HEST_NOTIFY_NMI: ghes_nmi_add(ghes); break; @@ -1211,6 +1261,9 @@ static int ghes_remove(struct platform_device *ghes_dev) case ACPI_HEST_NOTIFY_SEA: ghes_sea_remove(ghes); break; + case ACPI_HEST_NOTIFY_SEI: + ghes_sei_remove(ghes); + break; case ACPI_HEST_NOTIFY_NMI: ghes_nmi_remove(ghes); break; diff --git a/include/acpi/ghes.h b/include/acpi/ghes.h index 8feb0c8..9ba59e2 100644 --- a/include/acpi/ghes.h +++ b/include/acpi/ghes.h @@ -120,5 +120,6 @@ static inline void *acpi_hest_get_next(struct acpi_hest_generic_data *gdata) section = acpi_hest_get_next(section)) int ghes_notify_sea(void); +int ghes_notify_sei(void); #endif /* GHES_H */