From patchwork Mon Aug 5 12:53:35 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: 816813 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 3CF57159209; Mon, 5 Aug 2024 12:54:06 +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=1722862446; cv=none; b=EY+1Jtl3mfoDdF2ScF6V1NM3WMjjIKIlnRbtSKlpChDZK/odGUfdZ07gCrhqzNTR7RabgtAdbi4B8MHxr0EOUKZISX1tb8Sxihh3I9QsioTy9d85HMN4fx/8/m77bpBOw7T10VRHstpUS7ERtrisNYZ3BlqIt1GVEmCe5WAmyKE= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1722862446; c=relaxed/simple; bh=qvrl/9oyuQCy8rh63h+2SLCQP0eGNCvXSDn8ZBYMvGc=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=ZgK3grvtnypRuXlOYUy3ongQHbwrPKzhoLIO5jRetjrXzIRhzNwObT3GMg0Eiov4YTI0rZv1RV0dtJBakgvk2kFDOjDhOb/kva8BZHjSsCirswwu0BlGdURqQtPY3iPh9zk8xTYmPnXkw5w1ziWHS9TB5p9nyHRGsa1zS1pvMNg= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=Zl36+k44; 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="Zl36+k44" Received: by smtp.kernel.org (Postfix) with ESMTPSA id CA13DC4AF12; Mon, 5 Aug 2024 12:54:05 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1722862446; bh=qvrl/9oyuQCy8rh63h+2SLCQP0eGNCvXSDn8ZBYMvGc=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Zl36+k44RfYZ/VJm2jDGagXNGHyCk2DO0SeP1iUhXqbPfX9N2ecEjPeYRuBZXi8vx Sp8fBhl2ylBDB+/FkjEnVWibwql155OOb001J5Bzvx1xd4Fy1IFuJJdhwVBwcqP3g7 X3tSKVGptdfLCHEAGESSkFiPgc+8kfe5BrJNiesn2gqTOY60VNbXDpDkvaBKSdBDIl 9QsKvRVauPSOsQJSrYVGgeeHiHbEDg/j1639bOATlacP5dG9EEjRIjerVi+qY+op60 4Nr22REZs3BbZVIM1aEitnM5738eZz5lu2+0gPSthIcwf9hEJM51xrk8+nXl2kkgl2 ISeXZNQRpuB7Q== Received: from mchehab by mail.kernel.org with local (Exim 4.98) (envelope-from ) id 1saxDv-0000000CyYs-3saR; Mon, 05 Aug 2024 14:54:03 +0200 From: Mauro Carvalho Chehab To: Cc: Mauro Carvalho Chehab , "Rafael J. Wysocki" , =?utf-8?q?Uwe_Kleine-K?= =?utf-8?q?=C3=B6nig?= , Alison Schofield , Ard Biesheuvel , Borislav Petkov , Dan Williams , Daniel Ferguson , Dave Jiang , Ira Weiny , James Morse , Jonathan Cameron , Len Brown , Shiju Jose , Shuai Xue , Tony Luck , linux-acpi@vger.kernel.org, linux-efi@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v3 4/5] efi/cper: align ARM CPER type with UEFI 2.9A/2.10 specs Date: Mon, 5 Aug 2024 14:53:35 +0200 Message-ID: <65cab717663e79def53d156ccf689235769b070c.1722861911.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 Up to UEFI spec 2.9, the type byte of CPER struct for ARM processor was defined simply as: Type at byte offset 4: - Cache error - TLB Error - Bus Error - Micro-architectural Error All other values are reserved Yet, there was no information about how this would be encoded. Spec 2.9A errata corrected it by defining: - Bit 1 - Cache Error - Bit 2 - TLB Error - Bit 3 - Bus Error - Bit 4 - Micro-architectural Error All other values are reserved That actually aligns with the values already defined on older versions at N.2.4.1. Generic Processor Error Section. Spec 2.10 also preserve the same encoding as 2.9A. Adjust CPER and GHES handling code for both generic and ARM processors to properly handle UEFI 2.9A and 2.10 encoding. Link: https://uefi.org/specs/UEFI/2.10/Apx_N_Common_Platform_Error_Record.html#arm-processor-error-information Signed-off-by: Mauro Carvalho Chehab Reviewed-by: Jonathan Cameron --- drivers/acpi/apei/ghes.c | 15 ++++++---- drivers/firmware/efi/cper-arm.c | 50 ++++++++++++++++----------------- include/linux/cper.h | 10 +++---- 3 files changed, 38 insertions(+), 37 deletions(-) diff --git a/drivers/acpi/apei/ghes.c b/drivers/acpi/apei/ghes.c index 06d9351a9abc..d7d78d546f68 100644 --- a/drivers/acpi/apei/ghes.c +++ b/drivers/acpi/apei/ghes.c @@ -533,6 +533,7 @@ static bool ghes_handle_arm_hw_error(struct acpi_hest_generic_data *gdata, { struct cper_sec_proc_arm *err = acpi_hest_get_payload(gdata); int flags = sync ? MF_ACTION_REQUIRED : 0; + char error_type[120]; bool queued = false; int sec_sev, i; char *p; @@ -545,9 +546,8 @@ static bool ghes_handle_arm_hw_error(struct acpi_hest_generic_data *gdata, p = (char *)(err + 1); for (i = 0; i < err->err_info_num; i++) { struct cper_arm_err_info *err_info = (struct cper_arm_err_info *)p; - bool is_cache = (err_info->type == CPER_ARM_CACHE_ERROR); + bool is_cache = err_info->type & CPER_ARM_CACHE_ERROR; bool has_pa = (err_info->validation_bits & CPER_ARM_INFO_VALID_PHYSICAL_ADDR); - const char *error_type = "unknown error"; /* * The field (err_info->error_info & BIT(26)) is fixed to set to @@ -561,12 +561,15 @@ static bool ghes_handle_arm_hw_error(struct acpi_hest_generic_data *gdata, continue; } - if (err_info->type < ARRAY_SIZE(cper_proc_error_type_strs)) - error_type = cper_proc_error_type_strs[err_info->type]; + cper_bits_to_str(error_type, sizeof(error_type), + FIELD_GET(CPER_ARM_ERR_TYPE_MASK, err_info->type), + cper_proc_error_type_strs, + ARRAY_SIZE(cper_proc_error_type_strs)); pr_warn_ratelimited(FW_WARN GHES_PFX - "Unhandled processor error type: %s\n", - error_type); + "Unhandled processor error type 0x%02x: %s%s\n", + err_info->type, error_type, + (err_info->type & ~CPER_ARM_ERR_TYPE_MASK) ? " with reserved bit(s)" : ""); p += err_info->length; } diff --git a/drivers/firmware/efi/cper-arm.c b/drivers/firmware/efi/cper-arm.c index eb7ee6af55f2..52d18490b59e 100644 --- a/drivers/firmware/efi/cper-arm.c +++ b/drivers/firmware/efi/cper-arm.c @@ -93,15 +93,11 @@ static void cper_print_arm_err_info(const char *pfx, u32 type, bool proc_context_corrupt, corrected, precise_pc, restartable_pc; bool time_out, access_mode; - /* If the type is unknown, bail. */ - if (type > CPER_ARM_MAX_TYPE) - return; - /* * Vendor type errors have error information values that are vendor * specific. */ - if (type == CPER_ARM_VENDOR_ERROR) + if (type & CPER_ARM_VENDOR_ERROR) return; if (error_info & CPER_ARM_ERR_VALID_TRANSACTION_TYPE) { @@ -116,43 +112,38 @@ static void cper_print_arm_err_info(const char *pfx, u32 type, if (error_info & CPER_ARM_ERR_VALID_OPERATION_TYPE) { op_type = ((error_info >> CPER_ARM_ERR_OPERATION_SHIFT) & CPER_ARM_ERR_OPERATION_MASK); - switch (type) { - case CPER_ARM_CACHE_ERROR: + if (type & CPER_ARM_CACHE_ERROR) { if (op_type < ARRAY_SIZE(arm_cache_err_op_strs)) { - printk("%soperation type: %s\n", pfx, + printk("%scache error, operation type: %s\n", pfx, arm_cache_err_op_strs[op_type]); } - break; - case CPER_ARM_TLB_ERROR: + } + if (type & CPER_ARM_TLB_ERROR) { if (op_type < ARRAY_SIZE(arm_tlb_err_op_strs)) { - printk("%soperation type: %s\n", pfx, + printk("%sTLB error, operation type: %s\n", pfx, arm_tlb_err_op_strs[op_type]); } - break; - case CPER_ARM_BUS_ERROR: + } + if (type & CPER_ARM_BUS_ERROR) { if (op_type < ARRAY_SIZE(arm_bus_err_op_strs)) { - printk("%soperation type: %s\n", pfx, + printk("%sbus error, operation type: %s\n", pfx, arm_bus_err_op_strs[op_type]); } - break; } } if (error_info & CPER_ARM_ERR_VALID_LEVEL) { level = ((error_info >> CPER_ARM_ERR_LEVEL_SHIFT) & CPER_ARM_ERR_LEVEL_MASK); - switch (type) { - case CPER_ARM_CACHE_ERROR: + if (type & CPER_ARM_CACHE_ERROR) printk("%scache level: %d\n", pfx, level); - break; - case CPER_ARM_TLB_ERROR: + + if (type & CPER_ARM_TLB_ERROR) printk("%sTLB level: %d\n", pfx, level); - break; - case CPER_ARM_BUS_ERROR: + + if (type & CPER_ARM_BUS_ERROR) printk("%saffinity level at which the bus error occurred: %d\n", pfx, level); - break; - } } if (error_info & CPER_ARM_ERR_VALID_PROC_CONTEXT_CORRUPT) { @@ -241,6 +232,7 @@ void cper_print_proc_arm(const char *pfx, struct cper_arm_err_info *err_info; struct cper_arm_ctx_info *ctx_info; char newpfx[64], infopfx[ARRAY_SIZE(newpfx) + 1]; + char error_type[120]; printk("%sMIDR: 0x%016llx\n", pfx, proc->midr); @@ -289,9 +281,15 @@ void cper_print_proc_arm(const char *pfx, newpfx); } - printk("%serror_type: %d, %s\n", newpfx, err_info->type, - err_info->type < ARRAY_SIZE(cper_proc_error_type_strs) ? - cper_proc_error_type_strs[err_info->type] : "unknown"); + cper_bits_to_str(error_type, sizeof(error_type), + FIELD_GET(CPER_ARM_ERR_TYPE_MASK, err_info->type), + cper_proc_error_type_strs, + ARRAY_SIZE(cper_proc_error_type_strs)); + + printk("%serror_type: 0x%02x: %s%s\n", newpfx, err_info->type, + error_type, + (err_info->type & ~CPER_ARM_ERR_TYPE_MASK) ? " with reserved bit(s)" : ""); + if (err_info->validation_bits & CPER_ARM_INFO_VALID_ERR_INFO) { printk("%serror_info: 0x%016llx\n", newpfx, err_info->error_info); diff --git a/include/linux/cper.h b/include/linux/cper.h index 25858a7608b7..3670b866ac11 100644 --- a/include/linux/cper.h +++ b/include/linux/cper.h @@ -293,11 +293,11 @@ enum { #define CPER_ARM_INFO_FLAGS_PROPAGATED BIT(2) #define CPER_ARM_INFO_FLAGS_OVERFLOW BIT(3) -#define CPER_ARM_CACHE_ERROR 0 -#define CPER_ARM_TLB_ERROR 1 -#define CPER_ARM_BUS_ERROR 2 -#define CPER_ARM_VENDOR_ERROR 3 -#define CPER_ARM_MAX_TYPE CPER_ARM_VENDOR_ERROR +#define CPER_ARM_ERR_TYPE_MASK GENMASK(4,1) +#define CPER_ARM_CACHE_ERROR BIT(1) +#define CPER_ARM_TLB_ERROR BIT(2) +#define CPER_ARM_BUS_ERROR BIT(3) +#define CPER_ARM_VENDOR_ERROR BIT(4) #define CPER_ARM_ERR_VALID_TRANSACTION_TYPE BIT(0) #define CPER_ARM_ERR_VALID_OPERATION_TYPE BIT(1)