From patchwork Wed Aug 17 14:34:52 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jia He X-Patchwork-Id: 12945971 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 377BAC32774 for ; Wed, 17 Aug 2022 14:35:33 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S239527AbiHQOfb (ORCPT ); Wed, 17 Aug 2022 10:35:31 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:36410 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S239806AbiHQOf1 (ORCPT ); Wed, 17 Aug 2022 10:35:27 -0400 Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id 4BF3A205D1; Wed, 17 Aug 2022 07:35:26 -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 E0809113E; Wed, 17 Aug 2022 07:35:26 -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 1850A3F70D; Wed, 17 Aug 2022 07:35:19 -0700 (PDT) From: Jia He To: Ard Biesheuvel , Len Brown , James Morse , Tony Luck , Borislav Petkov , Mauro Carvalho Chehab , Robert Richter , Robert Moore , Qiuxu Zhuo , Yazen Ghannam Cc: 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, toshi.kani@hpe.com, nd@arm.com, Jia He Subject: [PATCH v2 1/7] efi/cper: export several helpers for ghes edac to use Date: Wed, 17 Aug 2022 14:34:52 +0000 Message-Id: <20220817143458.335938-2-justin.he@arm.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20220817143458.335938-1-justin.he@arm.com> References: <20220817143458.335938-1-justin.he@arm.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-edac@vger.kernel.org Before the ghes_edac codes are modularized, export several efi/cper helpers to avoid linking error of ghes_edac. Signed-off-by: Jia He Acked-by: Ard Biesheuvel --- drivers/firmware/efi/cper.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/firmware/efi/cper.c b/drivers/firmware/efi/cper.c index e4e5ea7ce910..053eae13f409 100644 --- a/drivers/firmware/efi/cper.c +++ b/drivers/firmware/efi/cper.c @@ -290,6 +290,7 @@ int cper_mem_err_location(struct cper_mem_err_compact *mem, char *msg) return n; } +EXPORT_SYMBOL_GPL(cper_mem_err_location); int cper_dimm_err_location(struct cper_mem_err_compact *mem, char *msg) { @@ -310,6 +311,7 @@ int cper_dimm_err_location(struct cper_mem_err_compact *mem, char *msg) return n; } +EXPORT_SYMBOL_GPL(cper_dimm_err_location); void cper_mem_err_pack(const struct cper_sec_mem_err *mem, struct cper_mem_err_compact *cmem) @@ -331,6 +333,7 @@ void cper_mem_err_pack(const struct cper_sec_mem_err *mem, cmem->mem_array_handle = mem->mem_array_handle; cmem->mem_dev_handle = mem->mem_dev_handle; } +EXPORT_SYMBOL_GPL(cper_mem_err_pack); const char *cper_mem_err_unpack(struct trace_seq *p, struct cper_mem_err_compact *cmem) From patchwork Wed Aug 17 14:34:53 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jia He X-Patchwork-Id: 12945972 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 828DCC25B08 for ; Wed, 17 Aug 2022 14:35:42 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S240141AbiHQOfl (ORCPT ); Wed, 17 Aug 2022 10:35:41 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:36492 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S239922AbiHQOff (ORCPT ); Wed, 17 Aug 2022 10:35:35 -0400 Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id BF0E278231; Wed, 17 Aug 2022 07:35:32 -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 5DCA01570; Wed, 17 Aug 2022 07:35:33 -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 930293F70D; Wed, 17 Aug 2022 07:35:26 -0700 (PDT) From: Jia He To: Ard Biesheuvel , Len Brown , James Morse , Tony Luck , Borislav Petkov , Mauro Carvalho Chehab , Robert Richter , Robert Moore , Qiuxu Zhuo , Yazen Ghannam Cc: 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, toshi.kani@hpe.com, nd@arm.com, Jia He Subject: [PATCH v2 2/7] EDAC/ghes: Add notifier to report ghes_edac mem error Date: Wed, 17 Aug 2022 14:34:53 +0000 Message-Id: <20220817143458.335938-3-justin.he@arm.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20220817143458.335938-1-justin.he@arm.com> References: <20220817143458.335938-1-justin.he@arm.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-edac@vger.kernel.org To modularize ghes_edac driver, any ghes_edac codes should not be invoked in ghes. Add a notifier of registering the ghes_edac_report_mem_error() to resolve the build dependency. The atomic notifier is used because ghes_proc_in_irq() can be in the irq context. Suggested-by: Borislav Petkov Signed-off-by: Jia He --- drivers/acpi/apei/ghes.c | 16 +++++++++++++++- drivers/edac/ghes_edac.c | 19 +++++++++++++++++-- include/acpi/ghes.h | 10 +++------- 3 files changed, 35 insertions(+), 10 deletions(-) diff --git a/drivers/acpi/apei/ghes.c b/drivers/acpi/apei/ghes.c index d91ad378c00d..8cb65f757d06 100644 --- a/drivers/acpi/apei/ghes.c +++ b/drivers/acpi/apei/ghes.c @@ -94,6 +94,8 @@ #define FIX_APEI_GHES_SDEI_CRITICAL __end_of_fixed_addresses #endif +static ATOMIC_NOTIFIER_HEAD(ghes_report_chain); + static inline bool is_hest_type_generic_v2(struct ghes *ghes) { return ghes->generic->header.type == ACPI_HEST_TYPE_GENERIC_ERROR_V2; @@ -645,7 +647,7 @@ static bool ghes_do_proc(struct ghes *ghes, if (guid_equal(sec_type, &CPER_SEC_PLATFORM_MEM)) { struct cper_sec_mem_err *mem_err = acpi_hest_get_payload(gdata); - ghes_edac_report_mem_error(sev, mem_err); + atomic_notifier_call_chain(&ghes_report_chain, sev, mem_err); arch_apei_report_mem_error(sev, mem_err); queued = ghes_handle_memory_failure(gdata, sev); @@ -1497,3 +1499,15 @@ void __init acpi_ghes_init(void) else pr_info(GHES_PFX "Failed to enable APEI firmware first mode.\n"); } + +void ghes_register_report_chain(struct notifier_block *nb) +{ + atomic_notifier_chain_register(&ghes_report_chain, nb); +} +EXPORT_SYMBOL_GPL(ghes_register_report_chain); + +void ghes_unregister_report_chain(struct notifier_block *nb) +{ + atomic_notifier_chain_unregister(&ghes_report_chain, nb); +} +EXPORT_SYMBOL_GPL(ghes_unregister_report_chain); diff --git a/drivers/edac/ghes_edac.c b/drivers/edac/ghes_edac.c index c8fa7dcfdbd0..7b8d56a769f6 100644 --- a/drivers/edac/ghes_edac.c +++ b/drivers/edac/ghes_edac.c @@ -14,6 +14,7 @@ #include #include "edac_module.h" #include +#include #define OTHER_DETAIL_LEN 400 @@ -267,11 +268,14 @@ static int print_mem_error_other_detail(const struct cper_sec_mem_err *mem, char return n; } -void ghes_edac_report_mem_error(int sev, struct cper_sec_mem_err *mem_err) +static int ghes_edac_report_mem_error(struct notifier_block *nb, + unsigned long val, void *data) { + struct cper_sec_mem_err *mem_err = (struct cper_sec_mem_err *)data; struct cper_mem_err_compact cmem; struct edac_raw_error_desc *e; struct mem_ctl_info *mci; + unsigned long sev = val; struct ghes_pvt *pvt; unsigned long flags; char *p; @@ -282,7 +286,7 @@ void ghes_edac_report_mem_error(int sev, struct cper_sec_mem_err *mem_err) * know. */ if (WARN_ON_ONCE(in_nmi())) - return; + return NOTIFY_OK; spin_lock_irqsave(&ghes_lock, flags); @@ -374,8 +378,15 @@ void ghes_edac_report_mem_error(int sev, struct cper_sec_mem_err *mem_err) unlock: spin_unlock_irqrestore(&ghes_lock, flags); + + return NOTIFY_OK; } +static struct notifier_block ghes_edac_mem_err_nb = { + .notifier_call = ghes_edac_report_mem_error, + .priority = 0, +}; + /* * Known systems that are safe to enable this module. */ @@ -503,6 +514,8 @@ int ghes_edac_register(struct ghes *ghes, struct device *dev) ghes_pvt = pvt; spin_unlock_irqrestore(&ghes_lock, flags); + ghes_register_report_chain(&ghes_edac_mem_err_nb); + /* only set on success */ refcount_set(&ghes_refcount, 1); @@ -548,6 +561,8 @@ void ghes_edac_unregister(struct ghes *ghes) if (mci) edac_mc_free(mci); + ghes_unregister_report_chain(&ghes_edac_mem_err_nb); + unlock: mutex_unlock(&ghes_reg_mutex); } diff --git a/include/acpi/ghes.h b/include/acpi/ghes.h index 34fb3431a8f3..5cbd38b6e4e1 100644 --- a/include/acpi/ghes.h +++ b/include/acpi/ghes.h @@ -76,18 +76,11 @@ int ghes_estatus_pool_init(int num_ghes); /* From drivers/edac/ghes_edac.c */ #ifdef CONFIG_EDAC_GHES -void ghes_edac_report_mem_error(int sev, struct cper_sec_mem_err *mem_err); - int ghes_edac_register(struct ghes *ghes, struct device *dev); void ghes_edac_unregister(struct ghes *ghes); #else -static inline void ghes_edac_report_mem_error(int sev, - struct cper_sec_mem_err *mem_err) -{ -} - static inline int ghes_edac_register(struct ghes *ghes, struct device *dev) { return -ENODEV; @@ -145,4 +138,7 @@ int ghes_notify_sea(void); static inline int ghes_notify_sea(void) { return -ENOENT; } #endif +struct notifier_block; +extern void ghes_register_report_chain(struct notifier_block *nb); +extern void ghes_unregister_report_chain(struct notifier_block *nb); #endif /* GHES_H */ From patchwork Wed Aug 17 14:34:54 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jia He X-Patchwork-Id: 12945973 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 E661FC32772 for ; Wed, 17 Aug 2022 14:35:43 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S240024AbiHQOfm (ORCPT ); Wed, 17 Aug 2022 10:35:42 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:36608 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S240110AbiHQOfl (ORCPT ); Wed, 17 Aug 2022 10:35:41 -0400 Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id DE5949A945; Wed, 17 Aug 2022 07:35:39 -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 1C2361576; Wed, 17 Aug 2022 07:35:40 -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 10C583F70D; Wed, 17 Aug 2022 07:35:32 -0700 (PDT) From: Jia He To: Ard Biesheuvel , Len Brown , James Morse , Tony Luck , Borislav Petkov , Mauro Carvalho Chehab , Robert Richter , Robert Moore , Qiuxu Zhuo , Yazen Ghannam Cc: 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, toshi.kani@hpe.com, nd@arm.com, Jia He , stable@kernel.org Subject: [PATCH v2 3/7] EDAC/ghes: Modularize ghes_edac driver to remove the dependency on ghes Date: Wed, 17 Aug 2022 14:34:54 +0000 Message-Id: <20220817143458.335938-4-justin.he@arm.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20220817143458.335938-1-justin.he@arm.com> References: <20220817143458.335938-1-justin.he@arm.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-edac@vger.kernel.org Commit dc4e8c07e9e2 ("ACPI: APEI: explicit init of HEST and GHES in apci_init()") introduced a bug that ghes_edac_register() would be invoked before edac_init(). Because at that time, the bus "edac" hadn't been even registered, this created sysfs /devices/mc0 instead of /sys/devices/system/edac/mc/mc0 on an Ampere eMag server. The solution is modularizing the ghes_edac driver. Use a list to save the probing devices in ghes_probe(), and defer the ghes_edac_register() to the new ghes_edac module_init() by iterating over the devices list. Co-developed-by: Borislav Petkov Signed-off-by: Borislav Petkov Signed-off-by: Jia He Fixes: dc4e8c07e9e2 ("ACPI: APEI: explicit init of HEST and GHES in apci_init()") Cc: stable@kernel.org Cc: Shuai Xue --- drivers/acpi/apei/ghes.c | 35 ++++++++++++++++++++++-- drivers/edac/Kconfig | 4 +-- drivers/edac/ghes_edac.c | 59 +++++++++++++++++++++++++--------------- include/acpi/ghes.h | 23 ++++------------ 4 files changed, 77 insertions(+), 44 deletions(-) diff --git a/drivers/acpi/apei/ghes.c b/drivers/acpi/apei/ghes.c index 8cb65f757d06..9c52183e3ad9 100644 --- a/drivers/acpi/apei/ghes.c +++ b/drivers/acpi/apei/ghes.c @@ -120,6 +120,9 @@ module_param_named(disable, ghes_disable, 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 @@ -1378,7 +1381,11 @@ static int ghes_probe(struct platform_device *ghes_dev) platform_set_drvdata(ghes_dev, ghes); - ghes_edac_register(ghes, &ghes_dev->dev); + ghes->dev = &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); @@ -1442,7 +1449,9 @@ static int ghes_remove(struct platform_device *ghes_dev) ghes_fini(ghes); - ghes_edac_unregister(ghes); + mutex_lock(&ghes_devs_mutex); + list_del_rcu(&ghes->elist); + mutex_unlock(&ghes_devs_mutex); kfree(ghes); @@ -1500,6 +1509,28 @@ 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(bool force) +{ + int idx = -1; + + if (IS_ENABLED(CONFIG_X86)) { + idx = acpi_match_platform_list(plat_list); + if (idx < 0 && !force) + return NULL; + } + + 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/drivers/edac/Kconfig b/drivers/edac/Kconfig index 17562cf1fe97..df45db81858b 100644 --- a/drivers/edac/Kconfig +++ b/drivers/edac/Kconfig @@ -53,8 +53,8 @@ config EDAC_DECODE_MCE has been initialized. config EDAC_GHES - bool "Output ACPI APEI/GHES BIOS detected errors via EDAC" - depends on ACPI_APEI_GHES && (EDAC=y) + tristate "Output ACPI APEI/GHES BIOS detected errors via EDAC" + depends on ACPI_APEI_GHES select UEFI_CPER help Not all machines support hardware-driven error report. Some of those diff --git a/drivers/edac/ghes_edac.c b/drivers/edac/ghes_edac.c index 7b8d56a769f6..3bdf8469882d 100644 --- a/drivers/edac/ghes_edac.c +++ b/drivers/edac/ghes_edac.c @@ -60,6 +60,8 @@ module_param(force_load, bool, 0); static bool system_scanned; +static struct list_head *ghes_devs; + /* Memory Device - Type 17 of SMBIOS spec */ struct memdev_dmi_entry { u8 type; @@ -387,34 +389,15 @@ static struct notifier_block ghes_edac_mem_err_nb = { .priority = 0, }; -/* - * Known systems that are safe to enable this module. - */ -static struct acpi_platform_list plat_list[] = { - {"HPE ", "Server ", 0, ACPI_SIG_FADT, all_versions}, - { } /* End */ -}; - -int ghes_edac_register(struct ghes *ghes, struct device *dev) +static int ghes_edac_register(struct device *dev) { bool fake = false; struct mem_ctl_info *mci; struct ghes_pvt *pvt; struct edac_mc_layer layers[1]; unsigned long flags; - int idx = -1; int rc = 0; - if (IS_ENABLED(CONFIG_X86)) { - /* Check if safe to enable on this system */ - idx = acpi_match_platform_list(plat_list); - if (!force_load && idx < 0) - return -ENODEV; - } else { - force_load = true; - idx = 0; - } - /* finish another registration/unregistration instance first */ mutex_lock(&ghes_reg_mutex); @@ -458,7 +441,7 @@ int ghes_edac_register(struct ghes *ghes, struct device *dev) pr_info("This system has a very crappy BIOS: It doesn't even list the DIMMS.\n"); pr_info("Its SMBIOS info is wrong. It is doubtful that the error report would\n"); pr_info("work on such system. Use this driver with caution\n"); - } else if (idx < 0) { + } else if (force_load) { pr_info("This EDAC driver relies on BIOS to enumerate memory and get error reports.\n"); pr_info("Unfortunately, not all BIOSes reflect the memory layout correctly.\n"); pr_info("So, the end result of using this driver varies from vendor to vendor.\n"); @@ -530,7 +513,7 @@ int ghes_edac_register(struct ghes *ghes, struct device *dev) return rc; } -void ghes_edac_unregister(struct ghes *ghes) +static void ghes_edac_unregister(struct ghes *ghes) { struct mem_ctl_info *mci; unsigned long flags; @@ -566,3 +549,35 @@ void ghes_edac_unregister(struct ghes *ghes) unlock: mutex_unlock(&ghes_reg_mutex); } + +static int __init ghes_edac_init(void) +{ + struct ghes *g, *g_tmp; + + ghes_devs = ghes_get_devices(force_load); + if (!ghes_devs) + return -ENODEV; + + if (!IS_ENABLED(CONFIG_X86)) + force_load = true; + + list_for_each_entry_safe(g, g_tmp, ghes_devs, elist) { + ghes_edac_register(g->dev); + } + + return 0; +} +module_init(ghes_edac_init); + +static void __exit ghes_edac_exit(void) +{ + struct ghes *g, *g_tmp; + + list_for_each_entry_safe(g, g_tmp, ghes_devs, elist) { + ghes_edac_unregister(g); + } +} +module_exit(ghes_edac_exit); + +MODULE_LICENSE("GPL"); +MODULE_DESCRIPTION("Output ACPI APEI/GHES BIOS detected errors module via EDAC"); diff --git a/include/acpi/ghes.h b/include/acpi/ghes.h index 5cbd38b6e4e1..150c0b9500d6 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 { @@ -69,28 +71,13 @@ 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(bool force); +#else +static inline struct list_head *ghes_get_devices(bool force) { return NULL; } #endif int ghes_estatus_pool_init(int num_ghes); -/* From drivers/edac/ghes_edac.c */ - -#ifdef CONFIG_EDAC_GHES -int ghes_edac_register(struct ghes *ghes, struct device *dev); - -void ghes_edac_unregister(struct ghes *ghes); - -#else -static inline int ghes_edac_register(struct ghes *ghes, struct device *dev) -{ - return -ENODEV; -} - -static inline void ghes_edac_unregister(struct ghes *ghes) -{ -} -#endif - static inline int acpi_hest_get_version(struct acpi_hest_generic_data *gdata) { return gdata->revision >> 8; From patchwork Wed Aug 17 14:34:55 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jia He X-Patchwork-Id: 12945974 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 095AFC25B08 for ; Wed, 17 Aug 2022 14:36:03 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S240200AbiHQOgB (ORCPT ); Wed, 17 Aug 2022 10:36:01 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:37276 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S239700AbiHQOf6 (ORCPT ); Wed, 17 Aug 2022 10:35:58 -0400 Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id 432339AFD0; Wed, 17 Aug 2022 07:35:46 -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 8F5201595; Wed, 17 Aug 2022 07:35:46 -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 C1D5D3F70D; Wed, 17 Aug 2022 07:35:39 -0700 (PDT) From: Jia He To: Ard Biesheuvel , Len Brown , James Morse , Tony Luck , Borislav Petkov , Mauro Carvalho Chehab , Robert Richter , Robert Moore , Qiuxu Zhuo , Yazen Ghannam Cc: 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, toshi.kani@hpe.com, nd@arm.com, Jia He Subject: [PATCH v2 4/7] EDAC: Get chipset-specific edac drivers selected only when ghes_edac is not enabled Date: Wed, 17 Aug 2022 14:34:55 +0000 Message-Id: <20220817143458.335938-5-justin.he@arm.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20220817143458.335938-1-justin.he@arm.com> References: <20220817143458.335938-1-justin.he@arm.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-edac@vger.kernel.org When ghes_edac is loaded, a regular edac driver for the CPU type / platform still attempts to register itself and fails in its module_init call. Suggested-by: Toshi Kani Suggested-by: Borislav Petkov Signed-off-by: Jia He --- drivers/edac/amd64_edac.c | 3 +++ drivers/edac/pnd2_edac.c | 3 +++ drivers/edac/sb_edac.c | 3 +++ drivers/edac/skx_base.c | 3 +++ 4 files changed, 12 insertions(+) diff --git a/drivers/edac/amd64_edac.c b/drivers/edac/amd64_edac.c index 2f854feeeb23..e4eaf6668feb 100644 --- a/drivers/edac/amd64_edac.c +++ b/drivers/edac/amd64_edac.c @@ -4329,6 +4329,9 @@ static int __init amd64_edac_init(void) int err = -ENODEV; int i; + if (ghes_get_devices(0)) + return -EBUSY; + owner = edac_get_owner(); if (owner && strncmp(owner, EDAC_MOD_STR, sizeof(EDAC_MOD_STR))) return -EBUSY; diff --git a/drivers/edac/pnd2_edac.c b/drivers/edac/pnd2_edac.c index a20b299f1202..73f2ba0e64e3 100644 --- a/drivers/edac/pnd2_edac.c +++ b/drivers/edac/pnd2_edac.c @@ -1528,6 +1528,9 @@ static int __init pnd2_init(void) edac_dbg(2, "\n"); + if (ghes_get_devices(0)) + return -EBUSY; + owner = edac_get_owner(); if (owner && strncmp(owner, EDAC_MOD_STR, sizeof(EDAC_MOD_STR))) return -EBUSY; diff --git a/drivers/edac/sb_edac.c b/drivers/edac/sb_edac.c index 9678ab97c7ac..1d0520a16840 100644 --- a/drivers/edac/sb_edac.c +++ b/drivers/edac/sb_edac.c @@ -3506,6 +3506,9 @@ static int __init sbridge_init(void) edac_dbg(2, "\n"); + if (ghes_get_devices(0)) + return -EBUSY; + owner = edac_get_owner(); if (owner && strncmp(owner, EDAC_MOD_STR, sizeof(EDAC_MOD_STR))) return -EBUSY; diff --git a/drivers/edac/skx_base.c b/drivers/edac/skx_base.c index 1abc020d49ab..fe267f8543f5 100644 --- a/drivers/edac/skx_base.c +++ b/drivers/edac/skx_base.c @@ -653,6 +653,9 @@ static int __init skx_init(void) edac_dbg(2, "\n"); + if (ghes_get_devices(0)) + return -EBUSY; + owner = edac_get_owner(); if (owner && strncmp(owner, EDAC_MOD_STR, sizeof(EDAC_MOD_STR))) return -EBUSY; From patchwork Wed Aug 17 14:34:56 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jia He X-Patchwork-Id: 12945975 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 F2E09C25B08 for ; Wed, 17 Aug 2022 14:36:21 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S240184AbiHQOgU (ORCPT ); Wed, 17 Aug 2022 10:36:20 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:37298 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S240214AbiHQOgC (ORCPT ); Wed, 17 Aug 2022 10:36:02 -0400 Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id CEE8C9BB40; Wed, 17 Aug 2022 07:35:52 -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 0F0C015BF; Wed, 17 Aug 2022 07:35:53 -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 412553F70D; Wed, 17 Aug 2022 07:35:46 -0700 (PDT) From: Jia He To: Ard Biesheuvel , Len Brown , James Morse , Tony Luck , Borislav Petkov , Mauro Carvalho Chehab , Robert Richter , Robert Moore , Qiuxu Zhuo , Yazen Ghannam Cc: 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, toshi.kani@hpe.com, nd@arm.com, Jia He Subject: [PATCH v2 5/7] EDAC/ghes: Prevent chipset-specific edac from loading after ghes_edac is registered Date: Wed, 17 Aug 2022 14:34:56 +0000 Message-Id: <20220817143458.335938-6-justin.he@arm.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20220817143458.335938-1-justin.he@arm.com> References: <20220817143458.335938-1-justin.he@arm.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-edac@vger.kernel.org Previous, there is only one edac can be registering in the EDAC core. After ghes_edac is modularized, the registering of ghes devices may be deferred when ghes_edac is loaded. Prevent the chipset-specific edac drivers from loading after ghes_edac is registered, which allow the edac drivers to get selected in e.g. HPE platform. Signed-off-by: Jia He --- drivers/acpi/apei/ghes.c | 14 ++++++++++++++ drivers/edac/amd64_edac.c | 2 +- drivers/edac/ghes_edac.c | 2 ++ drivers/edac/pnd2_edac.c | 2 +- drivers/edac/sb_edac.c | 2 +- drivers/edac/skx_base.c | 2 +- include/acpi/ghes.h | 4 ++++ 7 files changed, 24 insertions(+), 4 deletions(-) diff --git a/drivers/acpi/apei/ghes.c b/drivers/acpi/apei/ghes.c index 9c52183e3ad9..9272d963b57d 100644 --- a/drivers/acpi/apei/ghes.c +++ b/drivers/acpi/apei/ghes.c @@ -95,6 +95,7 @@ #endif static ATOMIC_NOTIFIER_HEAD(ghes_report_chain); +static bool devs_registered; static inline bool is_hest_type_generic_v2(struct ghes *ghes) { @@ -1266,6 +1267,18 @@ static int apei_sdei_unregister_ghes(struct ghes *ghes) return sdei_unregister_ghes(ghes); } +void set_ghes_devs_registered(bool flag) +{ + devs_registered = flag; +} +EXPORT_SYMBOL_GPL(set_ghes_devs_registered); + +bool ghes_devs_registered(void) +{ + return devs_registered; +} +EXPORT_SYMBOL_GPL(ghes_devs_registered); + static int ghes_probe(struct platform_device *ghes_dev) { struct acpi_hest_generic *generic; @@ -1382,6 +1395,7 @@ static int ghes_probe(struct platform_device *ghes_dev) platform_set_drvdata(ghes_dev, ghes); ghes->dev = &ghes_dev->dev; + set_ghes_devs_registered(false); mutex_lock(&ghes_devs_mutex); list_add_tail(&ghes->elist, &ghes_devs); diff --git a/drivers/edac/amd64_edac.c b/drivers/edac/amd64_edac.c index e4eaf6668feb..f48507fa7b94 100644 --- a/drivers/edac/amd64_edac.c +++ b/drivers/edac/amd64_edac.c @@ -4329,7 +4329,7 @@ static int __init amd64_edac_init(void) int err = -ENODEV; int i; - if (ghes_get_devices(0)) + if (ghes_get_devices(0) && ghes_devs_registered()) return -EBUSY; owner = edac_get_owner(); diff --git a/drivers/edac/ghes_edac.c b/drivers/edac/ghes_edac.c index 3bdf8469882d..d26644b3bc47 100644 --- a/drivers/edac/ghes_edac.c +++ b/drivers/edac/ghes_edac.c @@ -564,6 +564,7 @@ static int __init ghes_edac_init(void) list_for_each_entry_safe(g, g_tmp, ghes_devs, elist) { ghes_edac_register(g->dev); } + set_ghes_devs_registered(true); return 0; } @@ -576,6 +577,7 @@ static void __exit ghes_edac_exit(void) list_for_each_entry_safe(g, g_tmp, ghes_devs, elist) { ghes_edac_unregister(g); } + set_ghes_devs_registered(false); } module_exit(ghes_edac_exit); diff --git a/drivers/edac/pnd2_edac.c b/drivers/edac/pnd2_edac.c index 73f2ba0e64e3..66d89d00c4b3 100644 --- a/drivers/edac/pnd2_edac.c +++ b/drivers/edac/pnd2_edac.c @@ -1528,7 +1528,7 @@ static int __init pnd2_init(void) edac_dbg(2, "\n"); - if (ghes_get_devices(0)) + if (ghes_get_devices(0) && ghes_devs_registered()) return -EBUSY; owner = edac_get_owner(); diff --git a/drivers/edac/sb_edac.c b/drivers/edac/sb_edac.c index 1d0520a16840..a3a89e366a74 100644 --- a/drivers/edac/sb_edac.c +++ b/drivers/edac/sb_edac.c @@ -3506,7 +3506,7 @@ static int __init sbridge_init(void) edac_dbg(2, "\n"); - if (ghes_get_devices(0)) + if (ghes_get_devices(0) && ghes_devs_registered()) return -EBUSY; owner = edac_get_owner(); diff --git a/drivers/edac/skx_base.c b/drivers/edac/skx_base.c index fe267f8543f5..efa1ae79c35a 100644 --- a/drivers/edac/skx_base.c +++ b/drivers/edac/skx_base.c @@ -653,7 +653,7 @@ static int __init skx_init(void) edac_dbg(2, "\n"); - if (ghes_get_devices(0)) + if (ghes_get_devices(0) && ghes_devs_registered()) return -EBUSY; owner = edac_get_owner(); diff --git a/include/acpi/ghes.h b/include/acpi/ghes.h index 150c0b9500d6..21b9d4d4c3e9 100644 --- a/include/acpi/ghes.h +++ b/include/acpi/ghes.h @@ -72,8 +72,12 @@ int ghes_register_vendor_record_notifier(struct notifier_block *nb); */ void ghes_unregister_vendor_record_notifier(struct notifier_block *nb); struct list_head *ghes_get_devices(bool force); +bool ghes_devs_registered(void); +void set_ghes_devs_registered(bool flag); #else static inline struct list_head *ghes_get_devices(bool force) { return NULL; } +static inline bool ghes_devs_registered(void) { return false; } +static inline void set_ghes_devs_registered(bool flag) { return; } #endif int ghes_estatus_pool_init(int num_ghes); From patchwork Wed Aug 17 14:34:57 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jia He X-Patchwork-Id: 12945976 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 A03CEC32771 for ; Wed, 17 Aug 2022 14:36:33 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S240256AbiHQOgb (ORCPT ); Wed, 17 Aug 2022 10:36:31 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:37406 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S240242AbiHQOgG (ORCPT ); Wed, 17 Aug 2022 10:36:06 -0400 Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id B85DD9AFB8; Wed, 17 Aug 2022 07:35:59 -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 C11C415DB; Wed, 17 Aug 2022 07:35:59 -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 B50A63F70D; Wed, 17 Aug 2022 07:35:52 -0700 (PDT) From: Jia He To: Ard Biesheuvel , Len Brown , James Morse , Tony Luck , Borislav Petkov , Mauro Carvalho Chehab , Robert Richter , Robert Moore , Qiuxu Zhuo , Yazen Ghannam Cc: 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, toshi.kani@hpe.com, nd@arm.com, Jia He , kernel test robot Subject: [PATCH v2 6/7] apei/ghes: Use unrcu_pointer for cmpxchg Date: Wed, 17 Aug 2022 14:34:57 +0000 Message-Id: <20220817143458.335938-7-justin.he@arm.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20220817143458.335938-1-justin.he@arm.com> References: <20220817143458.335938-1-justin.he@arm.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-edac@vger.kernel.org ghes_estatus_caches should be add rcu annotation to avoid sparse warnings. drivers/acpi/apei/ghes.c:733:25: sparse: sparse: incompatible types in comparison expression (different address spaces): drivers/acpi/apei/ghes.c:733:25: sparse: struct ghes_estatus_cache [noderef] __rcu * drivers/acpi/apei/ghes.c:733:25: sparse: struct ghes_estatus_cache * drivers/acpi/apei/ghes.c:813:25: sparse: sparse: incompatible types in comparison expression (different address spaces): drivers/acpi/apei/ghes.c:813:25: sparse: struct ghes_estatus_cache [noderef] __rcu * drivers/acpi/apei/ghes.c:813:25: sparse: struct ghes_estatus_cache * unrcu_pointer is to strip the __rcu in cmpxchg. Reported-by: kernel test robot Signed-off-by: Jia He --- drivers/acpi/apei/ghes.c | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-) diff --git a/drivers/acpi/apei/ghes.c b/drivers/acpi/apei/ghes.c index 9272d963b57d..92ae58f4f7bb 100644 --- a/drivers/acpi/apei/ghes.c +++ b/drivers/acpi/apei/ghes.c @@ -144,7 +144,7 @@ struct ghes_vendor_record_entry { static struct gen_pool *ghes_estatus_pool; static unsigned long ghes_estatus_pool_size_request; -static struct ghes_estatus_cache *ghes_estatus_caches[GHES_ESTATUS_CACHES_SIZE]; +static struct ghes_estatus_cache __rcu *ghes_estatus_caches[GHES_ESTATUS_CACHES_SIZE]; static atomic_t ghes_estatus_cache_alloced; static int ghes_panic_timeout __read_mostly = 30; @@ -834,8 +834,9 @@ static void ghes_estatus_cache_add( } /* new_cache must be put into array after its contents are written */ smp_wmb(); - if (slot != -1 && cmpxchg(ghes_estatus_caches + slot, - slot_cache, new_cache) == slot_cache) { + if (slot != -1 && unrcu_pointer(cmpxchg(ghes_estatus_caches + slot, + RCU_INITIALIZER(slot_cache), + RCU_INITIALIZER(new_cache)))) { if (slot_cache) call_rcu(&slot_cache->rcu, ghes_estatus_cache_rcu_free); } else From patchwork Wed Aug 17 14:34:58 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jia He X-Patchwork-Id: 12945985 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 16A4EC25B08 for ; Wed, 17 Aug 2022 14:36:48 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S239975AbiHQOgq (ORCPT ); Wed, 17 Aug 2022 10:36:46 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:38246 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S240110AbiHQOgU (ORCPT ); Wed, 17 Aug 2022 10:36:20 -0400 Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id 4FA8F9BB53; Wed, 17 Aug 2022 07:36:06 -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 49568113E; Wed, 17 Aug 2022 07:36:06 -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 7591E3F70D; Wed, 17 Aug 2022 07:35:59 -0700 (PDT) From: Jia He To: Ard Biesheuvel , Len Brown , James Morse , Tony Luck , Borislav Petkov , Mauro Carvalho Chehab , Robert Richter , Robert Moore , Qiuxu Zhuo , Yazen Ghannam Cc: 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, toshi.kani@hpe.com, nd@arm.com, Jia He Subject: [PATCH v2 7/7] EDAC/igen6: Keep returned errno consistent when edac mc has been enabled Date: Wed, 17 Aug 2022 14:34:58 +0000 Message-Id: <20220817143458.335938-8-justin.he@arm.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20220817143458.335938-1-justin.he@arm.com> References: <20220817143458.335938-1-justin.he@arm.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-edac@vger.kernel.org Only a single edac driver can be enabled for EDAC MC. The igen6_init() should be returned with EBUSY instead of ENODEV, which is consistent with other edac drivers. Signed-off-by: Jia He --- drivers/edac/igen6_edac.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/edac/igen6_edac.c b/drivers/edac/igen6_edac.c index a07bbfd075d0..41503b80347c 100644 --- a/drivers/edac/igen6_edac.c +++ b/drivers/edac/igen6_edac.c @@ -1273,7 +1273,7 @@ static int __init igen6_init(void) owner = edac_get_owner(); if (owner && strncmp(owner, EDAC_MOD_STR, sizeof(EDAC_MOD_STR))) - return -ENODEV; + return -EBUSY; edac_op_state = EDAC_OPSTATE_NMI;