From patchwork Mon Jul 8 11:18:11 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mauro Carvalho Chehab X-Patchwork-Id: 811201 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 9D85F7E107; Mon, 8 Jul 2024 11:19:14 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1720437554; cv=none; b=DDM+Co+5twKbZ+nB0U0cZtaOKJpVjmLkAEWlicbm25aQMR8YP7o8DoW2e8rM7wAiv8pbZwdGrESh4caEHvtrsZIUeoQbCKNXbsT37v6iqmHEufiw9MCelVsB/5GJr5O/8vbC47fsnMMA/F1kxjzwA+um5sybm7mJFSBFx7BZ0bI= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1720437554; c=relaxed/simple; bh=gQA/pDZl+o/citIm68eR2hril/7u79ybBuHKsJuPcVw=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=QJvMh39C027YiOnX33phnzrAi2telqz4TD7P8nFU0NYbMbylkvgo8p6W7xxlEhASq4NExtXYsPBpwETt2HjqnLV0ZLpvfVwvwBy7uYQuwIYX5+QszZ3HPBxu2ugRxRqmpx8Jj69qgqWIDLTOVqR/Z5WmLwKA823YWrY4L7OZW54= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=Tgg2D+9i; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="Tgg2D+9i" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 03F3DC4AF0C; Mon, 8 Jul 2024 11:19:13 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1720437554; bh=gQA/pDZl+o/citIm68eR2hril/7u79ybBuHKsJuPcVw=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Tgg2D+9i7kSqyhLURWyMO5seZpWkrgd/DKdpH9rEA32ypvFJGfAffwqKe8ywpgSzL fYQnpZ+Qe7RVzwMixwElk9vcMwDFpvKTC3Uv6z5vPVG2MYUg25S/RTnPzP6D36m0st 2UC61DlJOkaiadEPxstgsjxCSpMxL3UNLg615Q4ysrhaDkT5EGaKSLxShsurjbw8Qa rAxi6KJQMBnUt4BBXiW38jllZz0tI0/xR8pWWIRgHyUnZaN61dsXFqUjaV9eDso4SX 1Sb5HbogIBdbEGZL7EDc8KQpARQ5jleN+ExNYxVJf3IRzl7PMJk/fCDIwNi1c4D/EF FQG5P0yreK2jA== Received: from mchehab by mail.kernel.org with local (Exim 4.97.1) (envelope-from ) id 1sQmOl-00000001SQc-2NnM; Mon, 08 Jul 2024 13:19:11 +0200 From: Mauro Carvalho Chehab To: Borislav Petkov , Tony Luck Cc: Shengwei Luo , "Ard Biesheuvel" , "James Morse" , "Jonathan Cameron" , "Len Brown" , "Rafael J. Wysocki" , "Shiju Jose" , =?utf-8?q?Uwe_Kleine-K=C3=B6nig?= , Dan Williams , Dave Jiang , Ira Weiny , Shuai Xue , Steven Rostedt , Tyler Baicar , Will Deacon , Xie XiuQi , linux-acpi@vger.kernel.org, linux-edac@vger.kernel.org, linux-efi@vger.kernel.org, linux-kernel@vger.kernel.org, Jason Tian , Daniel Ferguson , Mauro Carvalho Chehab Subject: [PATCH 2/6] RAS: Report all ARM processor CPER information to userspace Date: Mon, 8 Jul 2024 13:18:11 +0200 Message-ID: <48ed5eb4448d85ccb5503335087a3e6a5159ca1e.1720436039.git.mchehab+huawei@kernel.org> X-Mailer: git-send-email 2.45.2 In-Reply-To: References: Precedence: bulk X-Mailing-List: linux-acpi@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Sender: Mauro Carvalho Chehab From: Shengwei Luo The ARM processor CPER record was added at UEFI 2.6, and hasn't any changes up to UEFI 2.10 on its struct. Yet, the original arm_event trace code added on changeset e9279e83ad1f ("trace, ras: add ARM processor error trace event") is incomplete, as it only traces some fields of UAPI 2.6 table N.16, not exporting at all any information from tables N.17 to N.29 of the record. This is not enough for user to take appropriate action or to log what exactly happened. According to UEFI_2_9 specification chapter N2.4.4, the ARM processor error section includes: - several (ERR_INFO_NUM) ARM processor error information structures (Tables N.17 to N.20); - several (CONTEXT_INFO_NUM) ARM processor context information structures (Tables N.21 to N.29); - several vendor specific error information structures. The size is given by Section Length minus the size of the other fields. In addition to those data, it also exports two fields that are parsed by the GHES driver when firmware reports it, e. g.: - error severity - cpu logical index Report all of these information to userspace via trace uAPI, So that userspace can properly record the error and take decisions related to cpu core isolation according to error severity and other info. After this patch, all the data from ARM Processor record from table N.16 are directly or indirectly visible on userspace: ====================================== ============================= UEFI field on table N.16 ARM Processor trace fields ====================================== ============================= Validation handled when filling data for affinity MPIDR and running state. ERR_INFO_NUM pei_len CONTEXT_INFO_NUM ctx_len Section Length indirectly reported by pei_len, ctx_len and oem_len Error affinity level affinity MPIDR_EL1 mpidr MIDR_EL1 midr Running State running_state PSCI State psci_state Processor Error Information Structure pei_err - count at pei_len Processor Context ctx_err- count at ctx_len Vendor Specific Error Info oem - count at oem_len ====================================== ============================= It should be noticed that decoding of tables N.17 to N.29, if needed, will be handled on userspace. That gives more flexibility, as there won't be any need to flood the Kernel with micro-architecture specific error decoding). Also, decoding the other fields require a complex logic, and should be done for each of the several values inside the record field. So, let userspace daemons like rasdaemon decode them, parsing such tables and having vendor-specific micro-architecture-specific decoders. [mchehab: modified patch description and fix coding style] Fixes: e9279e83ad1f ("trace, ras: add ARM processor error trace event") Signed-off-by: Shengwei Luo Signed-off-by: Jason Tian Signed-off-by: Daniel Ferguson Tested-by: Shiju Jose Signed-off-by: Mauro Carvalho Chehab Cc: "Rafael J. Wysocki" Link: https://uefi.org/specs/UEFI/2.10/Apx_N_Common_Platform_Error_Record.html#arm-processor-error-section Reviewed-by: Jonathan Cameron --- drivers/acpi/apei/ghes.c | 3 +-- drivers/ras/ras.c | 45 +++++++++++++++++++++++++++++++++++-- include/linux/ras.h | 16 ++++++++++---- include/ras/ras_event.h | 48 +++++++++++++++++++++++++++++++++++----- 4 files changed, 99 insertions(+), 13 deletions(-) diff --git a/drivers/acpi/apei/ghes.c b/drivers/acpi/apei/ghes.c index 2589a3536d91..90efca025d27 100644 --- a/drivers/acpi/apei/ghes.c +++ b/drivers/acpi/apei/ghes.c @@ -538,9 +538,8 @@ static bool ghes_handle_arm_hw_error(struct acpi_hest_generic_data *gdata, int sec_sev, i; char *p; - log_arm_hw_error(err); - sec_sev = ghes_severity(gdata->error_severity); + log_arm_hw_error(err, sec_sev); if (sev != GHES_SEV_RECOVERABLE || sec_sev != GHES_SEV_RECOVERABLE) return false; diff --git a/drivers/ras/ras.c b/drivers/ras/ras.c index 5d94ab79c8c3..75acc09bc96a 100644 --- a/drivers/ras/ras.c +++ b/drivers/ras/ras.c @@ -52,10 +52,51 @@ void log_non_standard_event(const guid_t *sec_type, const guid_t *fru_id, trace_non_standard_event(sec_type, fru_id, fru_text, sev, err, len); } -void log_arm_hw_error(struct cper_sec_proc_arm *err) +void log_arm_hw_error(struct cper_sec_proc_arm *err, const u8 sev) { #if defined(CONFIG_ARM) || defined(CONFIG_ARM64) - trace_arm_event(err); + struct cper_arm_err_info *err_info; + struct cper_arm_ctx_info *ctx_info; + u8 *ven_err_data; + u32 ctx_len = 0; + int n, sz, cpu; + s32 vsei_len; + u32 pei_len; + u8 *pei_err; + u8 *ctx_err; + + pei_len = sizeof(struct cper_arm_err_info) * err->err_info_num; + pei_err = (u8 *)err + sizeof(struct cper_sec_proc_arm); + + err_info = (struct cper_arm_err_info *)(err + 1); + ctx_info = (struct cper_arm_ctx_info *)(err_info + err->err_info_num); + ctx_err = (u8 *)ctx_info; + for (n = 0; n < err->context_info_num; n++) { + sz = sizeof(struct cper_arm_ctx_info) + ctx_info->size; + ctx_info = (struct cper_arm_ctx_info *)((long)ctx_info + sz); + ctx_len += sz; + } + + vsei_len = err->section_length - (sizeof(struct cper_sec_proc_arm) + + pei_len + ctx_len); + if (vsei_len < 0) { + pr_warn(FW_BUG + "section length: %d\n", err->section_length); + pr_warn(FW_BUG + "section length is too small\n"); + pr_warn(FW_BUG + "firmware-generated error record is incorrect\n"); + vsei_len = 0; + } + ven_err_data = (u8 *)ctx_info; + + cpu = GET_LOGICAL_INDEX(err->mpidr); + /* when return value is invalid, set cpu index to -1 */ + if (cpu < 0) + cpu = -1; + + trace_arm_event(err, pei_err, pei_len, ctx_err, ctx_len, + ven_err_data, (u32)vsei_len, sev, cpu); #endif } diff --git a/include/linux/ras.h b/include/linux/ras.h index a64182bc72ad..6025afe5736a 100644 --- a/include/linux/ras.h +++ b/include/linux/ras.h @@ -24,8 +24,7 @@ int __init parse_cec_param(char *str); void log_non_standard_event(const guid_t *sec_type, const guid_t *fru_id, const char *fru_text, const u8 sev, const u8 *err, const u32 len); -void log_arm_hw_error(struct cper_sec_proc_arm *err); - +void log_arm_hw_error(struct cper_sec_proc_arm *err, const u8 sev); #else static inline void log_non_standard_event(const guid_t *sec_type, @@ -33,7 +32,7 @@ log_non_standard_event(const guid_t *sec_type, const u8 sev, const u8 *err, const u32 len) { return; } static inline void -log_arm_hw_error(struct cper_sec_proc_arm *err) { return; } +log_arm_hw_error(struct cper_sec_proc_arm *err, const u8 sev) { return; } #endif struct atl_err { @@ -52,5 +51,14 @@ static inline void amd_retire_dram_row(struct atl_err *err) { } static inline unsigned long amd_convert_umc_mca_addr_to_sys_addr(struct atl_err *err) { return -EINVAL; } #endif /* CONFIG_AMD_ATL */ - +#if defined(CONFIG_ARM) || defined(CONFIG_ARM64) +#include +/* + * Include ARM specific SMP header which provides a function mapping mpidr to + * cpu logical index. + */ +#define GET_LOGICAL_INDEX(mpidr) get_logical_index(mpidr & MPIDR_HWID_BITMASK) +#else +#define GET_LOGICAL_INDEX(mpidr) -EINVAL +#endif /* CONFIG_ARM || CONFIG_ARM64 */ #endif /* __RAS_H__ */ diff --git a/include/ras/ras_event.h b/include/ras/ras_event.h index 7c47151d5c72..ce5214f008eb 100644 --- a/include/ras/ras_event.h +++ b/include/ras/ras_event.h @@ -168,11 +168,24 @@ TRACE_EVENT(mc_event, * This event is generated when hardware detects an ARM processor error * has occurred. UEFI 2.6 spec section N.2.4.4. */ +#define APEIL "ARM Processor Err Info data len" +#define APEID "ARM Processor Err Info raw data" +#define APECIL "ARM Processor Err Context Info data len" +#define APECID "ARM Processor Err Context Info raw data" +#define VSEIL "Vendor Specific Err Info data len" +#define VSEID "Vendor Specific Err Info raw data" TRACE_EVENT(arm_event, - TP_PROTO(const struct cper_sec_proc_arm *proc), + TP_PROTO(const struct cper_sec_proc_arm *proc, const u8 *pei_err, + const u32 pei_len, + const u8 *ctx_err, + const u32 ctx_len, + const u8 *oem, + const u32 oem_len, + u8 sev, + int cpu), - TP_ARGS(proc), + TP_ARGS(proc, pei_err, pei_len, ctx_err, ctx_len, oem, oem_len, sev, cpu), TP_STRUCT__entry( __field(u64, mpidr) @@ -180,6 +193,14 @@ TRACE_EVENT(arm_event, __field(u32, running_state) __field(u32, psci_state) __field(u8, affinity) + __field(u32, pei_len) + __dynamic_array(u8, buf, pei_len) + __field(u32, ctx_len) + __dynamic_array(u8, buf1, ctx_len) + __field(u32, oem_len) + __dynamic_array(u8, buf2, oem_len) + __field(u8, sev) + __field(int, cpu) ), TP_fast_assign( @@ -199,12 +220,29 @@ TRACE_EVENT(arm_event, __entry->running_state = ~0; __entry->psci_state = ~0; } + __entry->pei_len = pei_len; + memcpy(__get_dynamic_array(buf), pei_err, pei_len); + __entry->ctx_len = ctx_len; + memcpy(__get_dynamic_array(buf1), ctx_err, ctx_len); + __entry->oem_len = oem_len; + memcpy(__get_dynamic_array(buf2), oem, oem_len); + __entry->sev = sev; + __entry->cpu = cpu; ), - TP_printk("affinity level: %d; MPIDR: %016llx; MIDR: %016llx; " - "running state: %d; PSCI state: %d", + TP_printk("cpu: %d; error: %d; affinity level: %d; MPIDR: %016llx; MIDR: %016llx; " + "running state: %d; PSCI state: %d; " + "%s: %d; %s: %s; %s: %d; %s: %s; %s: %d; %s: %s", + __entry->cpu, + __entry->sev, __entry->affinity, __entry->mpidr, __entry->midr, - __entry->running_state, __entry->psci_state) + __entry->running_state, __entry->psci_state, + APEIL, __entry->pei_len, APEID, + __print_hex(__get_dynamic_array(buf), __entry->pei_len), + APECIL, __entry->ctx_len, APECID, + __print_hex(__get_dynamic_array(buf1), __entry->ctx_len), + VSEIL, __entry->oem_len, VSEID, + __print_hex(__get_dynamic_array(buf2), __entry->oem_len)) ); /*