From patchwork Tue Dec 7 03:19:04 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Shuai Xue X-Patchwork-Id: 522632 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 64D60C433FE for ; Tue, 7 Dec 2021 03:19:18 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233779AbhLGDWp (ORCPT ); Mon, 6 Dec 2021 22:22:45 -0500 Received: from out30-57.freemail.mail.aliyun.com ([115.124.30.57]:32920 "EHLO out30-57.freemail.mail.aliyun.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233673AbhLGDWn (ORCPT ); Mon, 6 Dec 2021 22:22:43 -0500 X-Alimail-AntiSpam: AC=PASS; BC=-1|-1; BR=01201311R841e4; CH=green; DM=||false|; DS=||; FP=0|-1|-1|-1|0|-1|-1|-1; HT=e01e04394; MF=xueshuai@linux.alibaba.com; NM=1; PH=DS; RN=12; SR=0; TI=SMTPD_---0Uzhxh3P_1638847148; Received: from localhost.localdomain(mailfrom:xueshuai@linux.alibaba.com fp:SMTPD_---0Uzhxh3P_1638847148) by smtp.aliyun-inc.com(127.0.0.1); Tue, 07 Dec 2021 11:19:10 +0800 From: Shuai Xue To: mchehab@kernel.org, bp@alien8.de, tony.luck@intel.com, james.morse@arm.com, rric@kernel.org, ardb@kernel.org, linux-edac@vger.kernel.org, linux-kernel@vger.kernel.org, linux-efi@vger.kernel.org Cc: xueshuai@linux.alibaba.com, zhangliguang@linux.alibaba.com, zhuo.song@linux.alibaba.com Subject: [PATCH 1/2] ghes_edac: refactor memory error location processing Date: Tue, 7 Dec 2021 11:19:04 +0800 Message-Id: <20211207031905.61906-2-xueshuai@linux.alibaba.com> X-Mailer: git-send-email 2.30.1 (Apple Git-130) MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-efi@vger.kernel.org The memory error location processing in ghes_edac_report_mem_error() have Duplicated Code with cper_mem_err_location(), cper_dimm_err_location(), and cper_mem_err_type_str() in drivers/firmware/efi/cper.c. To avoid the duplicated code, this patch introduces the above cper_*() into ghes_edac_report_mem_error(). The EDAC error log is now properly reporting the error as follows (all Validation Bits are enabled): [ 375.938411] EDAC MC0: 1 CE single-symbol chipkill ECC on unknown memory (node: 0 card: 0 module: 0 rank: 0 bank: 513 bank_group: 2 bank_address: 1 device: 0 row: 4887 column: 1032 bit_position: 0 requestor_id: 0x0000000000000000 responder_id: 0x0000000000000000 DIMM location: not present. DMI handle: 0x0000 page:0x898b86 offset:0x20 grain:1 syndrome:0x0 - APEI location: node: 0 card: 0 module: 0 rank: 0 bank: 513 bank_group: 2 bank_address: 1 device: 0 row: 4887 column: 1032 bit_position: 0 requestor_id: 0x0000000000000000 responder_id: 0x0000000000000000 DIMM location: not present. DMI handle: 0x0000 status(0x0000000000000000): reserved) [ 375.938416] {2}[Hardware Error]: Hardware error from APEI Generic Hardware Error Source: 2 [ 375.938417] {2}[Hardware Error]: It has been corrected by h/w and requires no further action [ 375.938418] {2}[Hardware Error]: event severity: corrected [ 375.938419] {2}[Hardware Error]: Error 0, type: corrected [ 375.938420] {2}[Hardware Error]: section_type: memory error [ 375.938421] {2}[Hardware Error]: error_status: 0x0000000000000000 [ 375.938422] {2}[Hardware Error]: physical_address: 0x0000000898b86020 [ 375.938422] {2}[Hardware Error]: physical_address_mask: 0x0000000000000000 [ 375.938426] {2}[Hardware Error]: node: 0 card: 0 module: 0 rank: 0 bank: 513 bank_group: 2 bank_address: 1 device: 0 row: 4887 column: 1032 bit_position: 0 requestor_id: 0x0000000000000000 responder_id: 0x0000000000000000 [ 375.938426] {2}[Hardware Error]: error_type: 4, single-symbol chipkill ECC [ 375.938428] {2}[Hardware Error]: DIMM location: not present. DMI handle: 0x0000 Signed-off-by: Shuai Xue --- drivers/edac/ghes_edac.c | 108 ++++-------------------------------- drivers/firmware/efi/cper.c | 4 +- include/linux/cper.h | 2 + 3 files changed, 14 insertions(+), 100 deletions(-) diff --git a/drivers/edac/ghes_edac.c b/drivers/edac/ghes_edac.c index 6d1ddecbf0da..7b25c3207c11 100644 --- a/drivers/edac/ghes_edac.c +++ b/drivers/edac/ghes_edac.c @@ -239,6 +239,7 @@ void ghes_edac_report_mem_error(int sev, struct cper_sec_mem_err *mem_err) { struct edac_raw_error_desc *e; struct mem_ctl_info *mci; + struct cper_mem_err_compact cmem; struct ghes_pvt *pvt; unsigned long flags; char *p; @@ -292,60 +293,10 @@ void ghes_edac_report_mem_error(int sev, struct cper_sec_mem_err *mem_err) /* Error type, mapped on e->msg */ if (mem_err->validation_bits & CPER_MEM_VALID_ERROR_TYPE) { + u8 etype = mem_err->error_type; + p = pvt->msg; - switch (mem_err->error_type) { - case 0: - p += sprintf(p, "Unknown"); - break; - case 1: - p += sprintf(p, "No error"); - break; - case 2: - p += sprintf(p, "Single-bit ECC"); - break; - case 3: - p += sprintf(p, "Multi-bit ECC"); - break; - case 4: - p += sprintf(p, "Single-symbol ChipKill ECC"); - break; - case 5: - p += sprintf(p, "Multi-symbol ChipKill ECC"); - break; - case 6: - p += sprintf(p, "Master abort"); - break; - case 7: - p += sprintf(p, "Target abort"); - break; - case 8: - p += sprintf(p, "Parity Error"); - break; - case 9: - p += sprintf(p, "Watchdog timeout"); - break; - case 10: - p += sprintf(p, "Invalid address"); - break; - case 11: - p += sprintf(p, "Mirror Broken"); - break; - case 12: - p += sprintf(p, "Memory Sparing"); - break; - case 13: - p += sprintf(p, "Scrub corrected error"); - break; - case 14: - p += sprintf(p, "Scrub uncorrected error"); - break; - case 15: - p += sprintf(p, "Physical Memory Map-out event"); - break; - default: - p += sprintf(p, "reserved error (%d)", - mem_err->error_type); - } + p += snprintf(p, sizeof(pvt->msg), "%s", cper_mem_err_type_str(etype)); } else { strcpy(pvt->msg, "unknown error"); } @@ -362,42 +313,13 @@ void ghes_edac_report_mem_error(int sev, struct cper_sec_mem_err *mem_err) /* Memory error location, mapped on e->location */ p = e->location; - if (mem_err->validation_bits & CPER_MEM_VALID_NODE) - p += sprintf(p, "node:%d ", mem_err->node); - if (mem_err->validation_bits & CPER_MEM_VALID_CARD) - p += sprintf(p, "card:%d ", mem_err->card); - if (mem_err->validation_bits & CPER_MEM_VALID_MODULE) - p += sprintf(p, "module:%d ", mem_err->module); - if (mem_err->validation_bits & CPER_MEM_VALID_RANK_NUMBER) - p += sprintf(p, "rank:%d ", mem_err->rank); - if (mem_err->validation_bits & CPER_MEM_VALID_BANK) - p += sprintf(p, "bank:%d ", mem_err->bank); - if (mem_err->validation_bits & CPER_MEM_VALID_BANK_GROUP) - p += sprintf(p, "bank_group:%d ", - mem_err->bank >> CPER_MEM_BANK_GROUP_SHIFT); - if (mem_err->validation_bits & CPER_MEM_VALID_BANK_ADDRESS) - p += sprintf(p, "bank_address:%d ", - mem_err->bank & CPER_MEM_BANK_ADDRESS_MASK); - if (mem_err->validation_bits & (CPER_MEM_VALID_ROW | CPER_MEM_VALID_ROW_EXT)) { - u32 row = mem_err->row; - - row |= cper_get_mem_extension(mem_err->validation_bits, mem_err->extended); - p += sprintf(p, "row:%d ", row); - } - if (mem_err->validation_bits & CPER_MEM_VALID_COLUMN) - p += sprintf(p, "col:%d ", mem_err->column); - if (mem_err->validation_bits & CPER_MEM_VALID_BIT_POSITION) - p += sprintf(p, "bit_pos:%d ", mem_err->bit_pos); + cper_mem_err_pack(mem_err, &cmem); + p += cper_mem_err_location(&cmem, p); + if (mem_err->validation_bits & CPER_MEM_VALID_MODULE_HANDLE) { - const char *bank = NULL, *device = NULL; struct dimm_info *dimm; - dmi_memdev_name(mem_err->mem_dev_handle, &bank, &device); - if (bank != NULL && device != NULL) - p += sprintf(p, "DIMM location:%s %s ", bank, device); - else - p += sprintf(p, "DIMM DMI handle: 0x%.4x ", - mem_err->mem_dev_handle); + p += cper_dimm_err_location(&cmem, p); dimm = find_dimm_by_handle(mci, mem_err->mem_dev_handle); if (dimm) { @@ -405,9 +327,7 @@ void ghes_edac_report_mem_error(int sev, struct cper_sec_mem_err *mem_err) strcpy(e->label, dimm->label); } } - if (mem_err->validation_bits & CPER_MEM_VALID_CHIP_ID) - p += sprintf(p, "chipID: %d ", - mem_err->extended >> CPER_MEM_CHIP_ID_SHIFT); + if (p > e->location) *(p - 1) = '\0'; @@ -479,15 +399,7 @@ void ghes_edac_report_mem_error(int sev, struct cper_sec_mem_err *mem_err) break; } } - if (mem_err->validation_bits & CPER_MEM_VALID_REQUESTOR_ID) - p += sprintf(p, "requestorID: 0x%016llx ", - (long long)mem_err->requestor_id); - if (mem_err->validation_bits & CPER_MEM_VALID_RESPONDER_ID) - p += sprintf(p, "responderID: 0x%016llx ", - (long long)mem_err->responder_id); - if (mem_err->validation_bits & CPER_MEM_VALID_TARGET_ID) - p += sprintf(p, "targetID: 0x%016llx ", - (long long)mem_err->responder_id); + if (p > pvt->other_detail) *(p - 1) = '\0'; diff --git a/drivers/firmware/efi/cper.c b/drivers/firmware/efi/cper.c index 6ec8edec6329..08eabb2e23f8 100644 --- a/drivers/firmware/efi/cper.c +++ b/drivers/firmware/efi/cper.c @@ -211,7 +211,7 @@ const char *cper_mem_err_type_str(unsigned int etype) } EXPORT_SYMBOL_GPL(cper_mem_err_type_str); -static int cper_mem_err_location(struct cper_mem_err_compact *mem, char *msg) +int cper_mem_err_location(struct cper_mem_err_compact *mem, char *msg) { u32 len, n; @@ -265,7 +265,7 @@ static int cper_mem_err_location(struct cper_mem_err_compact *mem, char *msg) return n; } -static int cper_dimm_err_location(struct cper_mem_err_compact *mem, char *msg) +int cper_dimm_err_location(struct cper_mem_err_compact *mem, char *msg) { u32 len, n; const char *bank = NULL, *device = NULL; diff --git a/include/linux/cper.h b/include/linux/cper.h index 6a511a1078ca..918e7efffb60 100644 --- a/include/linux/cper.h +++ b/include/linux/cper.h @@ -568,5 +568,7 @@ void cper_print_proc_arm(const char *pfx, const struct cper_sec_proc_arm *proc); void cper_print_proc_ia(const char *pfx, const struct cper_sec_proc_ia *proc); +int cper_mem_err_location(struct cper_mem_err_compact *mem, char *msg); +int cper_dimm_err_location(struct cper_mem_err_compact *mem, char *msg); #endif From patchwork Tue Dec 7 03:19:05 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Shuai Xue X-Patchwork-Id: 521743 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 2CA69C43217 for ; Tue, 7 Dec 2021 03:19:19 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233794AbhLGDWr (ORCPT ); Mon, 6 Dec 2021 22:22:47 -0500 Received: from out30-130.freemail.mail.aliyun.com ([115.124.30.130]:47463 "EHLO out30-130.freemail.mail.aliyun.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233757AbhLGDWo (ORCPT ); Mon, 6 Dec 2021 22:22:44 -0500 X-Alimail-AntiSpam: AC=PASS; BC=-1|-1; BR=01201311R721e4; CH=green; DM=||false|; DS=||; FP=0|-1|-1|-1|0|-1|-1|-1; HT=e01e04395; MF=xueshuai@linux.alibaba.com; NM=1; PH=DS; RN=12; SR=0; TI=SMTPD_---0Uzhxh3P_1638847148; Received: from localhost.localdomain(mailfrom:xueshuai@linux.alibaba.com fp:SMTPD_---0Uzhxh3P_1638847148) by smtp.aliyun-inc.com(127.0.0.1); Tue, 07 Dec 2021 11:19:11 +0800 From: Shuai Xue To: mchehab@kernel.org, bp@alien8.de, tony.luck@intel.com, james.morse@arm.com, rric@kernel.org, ardb@kernel.org, linux-edac@vger.kernel.org, linux-kernel@vger.kernel.org, linux-efi@vger.kernel.org Cc: xueshuai@linux.alibaba.com, zhangliguang@linux.alibaba.com, zhuo.song@linux.alibaba.com Subject: [PATCH 2/2] ghes_edac: refactor error status fields decoding Date: Tue, 7 Dec 2021 11:19:05 +0800 Message-Id: <20211207031905.61906-3-xueshuai@linux.alibaba.com> X-Mailer: git-send-email 2.30.1 (Apple Git-130) In-Reply-To: <20211207031905.61906-2-xueshuai@linux.alibaba.com> References: <20211207031905.61906-2-xueshuai@linux.alibaba.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-efi@vger.kernel.org ghes_edac_report_mem_error() in ghes_edac.c is a Long Method in which the error status fields decoding could be refactored for reuse. On the other hand, the cper_print_mem() only reports the error status and misses its description. This patch introduces a new helper function cper_mem_err_status_str() which is used to wrap up the decoding logics, and the cper_print_mem() will call it and report the details of error status description. The cper error log is now properly reporting the error as follows (all Validation Bits are enabled): [37863.026267] EDAC MC0: 1 CE single-symbol chipkill ECC on unknown memory (node: 0 card: 0 module: 0 rank: 0 bank: 1282 bank_group: 5 bank_address: 2 device: 0 row: 11387 column: 1544 bit_position: 0 requestor_id: 0x0000000000000000 responder_id: 0x0000000000000000 DIMM location: not present. DMI handle: 0x0000 page:0x963d9b offset:0x20 grain:1 syndrome:0x0 - APEI location: node: 0 card: 0 module: 0 rank: 0 bank: 1282 bank_group: 5 bank_address: 2 device: 0 row: 11387 column: 1544 bit_position: 0 requestor_id: 0x0000000000000000 responder_id: 0x0000000000000000 DIMM location: not present. DMI handle: 0x0000 status(0x0000000000000000): reserved) [37863.026272] {2}[Hardware Error]: Hardware error from APEI Generic Hardware Error Source: 2 [37863.026273] {2}[Hardware Error]: It has been corrected by h/w and requires no further action [37863.026275] {2}[Hardware Error]: event severity: corrected [37863.026276] {2}[Hardware Error]: Error 0, type: corrected [37863.026278] {2}[Hardware Error]: section_type: memory error [37863.026279] {2}[Hardware Error]: error_status: 0x0000000000000000, reserved [37863.026279] {2}[Hardware Error]: physical_address: 0x0000000963d9b020 [37863.026280] {2}[Hardware Error]: physical_address_mask: 0x0000000000000000 [37863.026282] {2}[Hardware Error]: node: 0 card: 0 module: 0 rank: 0 bank: 1282 bank_group: 5 bank_address: 2 device: 0 row: 11387 column: 1544 bit_position: 0 requestor_id: 0x0000000000000000 responder_id: 0x0000000000000000 [37863.026283] {2}[Hardware Error]: error_type: 4, single-symbol chipkill ECC [37863.026284] {2}[Hardware Error]: DIMM location: not present. DMI handle: 0x0000 Signed-off-by: Shuai Xue --- drivers/edac/ghes_edac.c | 89 +++++++++++-------------------------- drivers/firmware/efi/cper.c | 49 ++++++++++++++++++-- include/linux/cper.h | 5 ++- 3 files changed, 75 insertions(+), 68 deletions(-) diff --git a/drivers/edac/ghes_edac.c b/drivers/edac/ghes_edac.c index 7b25c3207c11..b74ffd82f56b 100644 --- a/drivers/edac/ghes_edac.c +++ b/drivers/edac/ghes_edac.c @@ -235,6 +235,31 @@ static void ghes_scan_system(void) system_scanned = true; } +static int ghes_edac_mem_err_other_detail(const struct cper_sec_mem_err *mem, + char *msg, const char *location) +{ + u32 len, n; + + if (!msg) + return 0; + + n = 0; + len = 2 * CPER_REC_LEN - 1; + + n += snprintf(msg + n, len - n, "APEI location: %s ", location); + + if (mem->validation_bits & CPER_MEM_VALID_ERROR_STATUS) { + u64 status = mem->error_status; + + n += snprintf(msg + n, len - n, "status(0x%016llx): ", + (long long)status); + n += snprintf(msg + n, len - n, "%s ", cper_mem_err_status_str(status)); + } + + msg[n] = '\0'; + return n; +} + void ghes_edac_report_mem_error(int sev, struct cper_sec_mem_err *mem_err) { struct edac_raw_error_desc *e; @@ -336,69 +361,7 @@ void ghes_edac_report_mem_error(int sev, struct cper_sec_mem_err *mem_err) /* All other fields are mapped on e->other_detail */ p = pvt->other_detail; - p += snprintf(p, sizeof(pvt->other_detail), - "APEI location: %s ", e->location); - if (mem_err->validation_bits & CPER_MEM_VALID_ERROR_STATUS) { - u64 status = mem_err->error_status; - - p += sprintf(p, "status(0x%016llx): ", (long long)status); - switch ((status >> 8) & 0xff) { - case 1: - p += sprintf(p, "Error detected internal to the component "); - break; - case 16: - p += sprintf(p, "Error detected in the bus "); - break; - case 4: - p += sprintf(p, "Storage error in DRAM memory "); - break; - case 5: - p += sprintf(p, "Storage error in TLB "); - break; - case 6: - p += sprintf(p, "Storage error in cache "); - break; - case 7: - p += sprintf(p, "Error in one or more functional units "); - break; - case 8: - p += sprintf(p, "component failed self test "); - break; - case 9: - p += sprintf(p, "Overflow or undervalue of internal queue "); - break; - case 17: - p += sprintf(p, "Virtual address not found on IO-TLB or IO-PDIR "); - break; - case 18: - p += sprintf(p, "Improper access error "); - break; - case 19: - p += sprintf(p, "Access to a memory address which is not mapped to any component "); - break; - case 20: - p += sprintf(p, "Loss of Lockstep "); - break; - case 21: - p += sprintf(p, "Response not associated with a request "); - break; - case 22: - p += sprintf(p, "Bus parity error - must also set the A, C, or D Bits "); - break; - case 23: - p += sprintf(p, "Detection of a PATH_ERROR "); - break; - case 25: - p += sprintf(p, "Bus operation timeout "); - break; - case 26: - p += sprintf(p, "A read was issued to data that has been poisoned "); - break; - default: - p += sprintf(p, "reserved "); - break; - } - } + p += ghes_edac_mem_err_other_detail(mem_err, p, e->location); if (p > pvt->other_detail) *(p - 1) = '\0'; diff --git a/drivers/firmware/efi/cper.c b/drivers/firmware/efi/cper.c index 08eabb2e23f8..6bf3e293c006 100644 --- a/drivers/firmware/efi/cper.c +++ b/drivers/firmware/efi/cper.c @@ -211,7 +211,7 @@ const char *cper_mem_err_type_str(unsigned int etype) } EXPORT_SYMBOL_GPL(cper_mem_err_type_str); -int cper_mem_err_location(struct cper_mem_err_compact *mem, char *msg) +int cper_mem_err_location(const struct cper_mem_err_compact *mem, char *msg) { u32 len, n; @@ -265,7 +265,7 @@ int cper_mem_err_location(struct cper_mem_err_compact *mem, char *msg) return n; } -int cper_dimm_err_location(struct cper_mem_err_compact *mem, char *msg) +int cper_dimm_err_location(const struct cper_mem_err_compact *mem, char *msg) { u32 len, n; const char *bank = NULL, *device = NULL; @@ -285,6 +285,48 @@ int cper_dimm_err_location(struct cper_mem_err_compact *mem, char *msg) return n; } +const char *cper_mem_err_status_str(u64 status) +{ + switch ((status >> 8) & 0xff) { + case 1: + return "Error detected internal to the component"; + case 16: + return "Error detected in the bus"; + case 4: + return "Storage error in DRAM memory"; + case 5: + return "Storage error in TLB"; + case 6: + return "Storage error in cache"; + case 7: + return "Error in one or more functional units"; + case 8: + return "component failed self test"; + case 9: + return "Overflow or undervalue of internal queue"; + case 17: + return "Virtual address not found on IO-TLB or IO-PDIR"; + case 18: + return "Improper access error"; + case 19: + return "Access to a memory address which is not mapped to any component"; + case 20: + return "Loss of Lockstep"; + case 21: + return "Response not associated with a request"; + case 22: + return "Bus parity error - must also set the A, C, or D Bits"; + case 23: + return "Detection of a PATH_ERROR "; + case 25: + return "Bus operation timeout"; + case 26: + return "A read was issued to data that has been poisoned"; + default: + return "reserved"; + } +} + void cper_mem_err_pack(const struct cper_sec_mem_err *mem, struct cper_mem_err_compact *cmem) { @@ -334,7 +376,8 @@ static void cper_print_mem(const char *pfx, const struct cper_sec_mem_err *mem, return; } if (mem->validation_bits & CPER_MEM_VALID_ERROR_STATUS) - printk("%s""error_status: 0x%016llx\n", pfx, mem->error_status); + printk("%s""error_status: 0x%016llx, %s\n", pfx, mem->error_status, + cper_mem_err_status_str(mem->error_status)); if (mem->validation_bits & CPER_MEM_VALID_PA) printk("%s""physical_address: 0x%016llx\n", pfx, mem->physical_addr); diff --git a/include/linux/cper.h b/include/linux/cper.h index 918e7efffb60..a45fb7ceacf8 100644 --- a/include/linux/cper.h +++ b/include/linux/cper.h @@ -568,7 +568,8 @@ void cper_print_proc_arm(const char *pfx, const struct cper_sec_proc_arm *proc); void cper_print_proc_ia(const char *pfx, const struct cper_sec_proc_ia *proc); -int cper_mem_err_location(struct cper_mem_err_compact *mem, char *msg); -int cper_dimm_err_location(struct cper_mem_err_compact *mem, char *msg); +int cper_mem_err_location(const struct cper_mem_err_compact *mem, char *msg); +int cper_dimm_err_location(const struct cper_mem_err_compact *mem, char *msg); +const char *cper_mem_err_status_str(u64 status); #endif