From patchwork Mon Jun 24 09:19:17 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: 13709228 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 5AC5812E1F6; Mon, 24 Jun 2024 09:19:50 +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=1719220790; cv=none; b=ZYixsa4sKIPUTvHszCbmj/Vf5w7W5bG3BBOr4N1kVVZeFWirMUIQMQ/LjePCvu7scOVi0AveROfT+cGcMo7PIVKDwOD4FJ7/8c45U7XHPZ+sb9auH/XeFXWgr+m/4AVcpV0qHHayps3tQt5oODmZTr5kxf5urbHYzFsAkdZxJqw= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1719220790; c=relaxed/simple; bh=oU/8r7bCLv97UE0Vbd5wfZPsGHSnpZEWps6OW3Re6iY=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version:Content-Type; b=mvvIm4NmKiWpASZoRitTo0dPQprgxEKwQ4h8fJ3CPGYpX8GArCf4egPKfaN2EJIVRhvPRsz/PiMyJIceq7ITwUKWTQ/yi7YGI1MvKKtPGcwU4ITc5wU8PrNLtZ5B0+lZNuBsf2UNelKSw6trzFep37ygmMmVD26aKb7NRwHCG+c= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=fDUDM/rc; 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="fDUDM/rc" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 0DB07C32789; Mon, 24 Jun 2024 09:19:49 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1719220790; bh=oU/8r7bCLv97UE0Vbd5wfZPsGHSnpZEWps6OW3Re6iY=; h=From:To:Cc:Subject:Date:From; b=fDUDM/rcfjvVFi3bB/GzUkANTdmyfRJjUvwindo/e8azmI+AAma0IIVyCPla0ocxG 3Hx0HSaJcjENu71NAcnXuDVZfg/hW2n+/S22/ARbZdiUqWRFVR/C5ZZT3+ZiE/ECNf CBjJwMMe/AECuukZUN/topehhHRVLeOxwYqkPrCmIDKb0ygf1KM5Epwqtzh6fZc5ET SdBTWAAY+zbn4eQ3E0lVpUtWBbJmDfzRYJx7EhIYZveNHKg2cx08T19Wl9op6HBRdZ 429WVVaq49nkgWfbiJ6EWN/uWBu4uWdGBFaRr1d03vJWToyk4MretRZYHK0YriCMSI pKHQ1HOLtaE+A== Received: from mchehab by mail.kernel.org with local (Exim 4.97.1) (envelope-from ) id 1sLfrX-000000085bc-1UbK; Mon, 24 Jun 2024 11:19:47 +0200 From: Mauro Carvalho Chehab To: Cc: Mauro Carvalho Chehab , Borislav Petkov , Tony Luck , James Morse , Jonathan Cameron , Shiju Jose , linux-efi@vger.kernel.org, linux-kernel@vger.kernel.org, linux-edac@vger.kernel.org, Ard Biesheuvel , Jonathan Corbet , Len Brown , linux-acpi@vger.kernel.org, linux-doc@vger.kernel.org Subject: [PATCH v5 0/4] fix CPER issues related to UEFI 2.9A Errata Date: Mon, 24 Jun 2024 11:19:17 +0200 Message-ID: X-Mailer: git-send-email 2.45.2 Precedence: bulk X-Mailing-List: linux-edac@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Sender: Mauro Carvalho Chehab The UEFI 2.9A errata makes clear how ARM processor type encoding should be done: it is meant to be equal to Generic processor, using a bitmask. The current code assumes, for both generic and ARM processor types that this is an integer, which is an incorrect assumption. Fix it. While here, also fix a compilation issue when using W=1. After the change, Kernel will properly decode receiving two errors at the same message, as defined at UEFI spec: [ 75.282430] Memory failure: 0x5cdfd: recovery action for free buddy page: Recovered [ 94.973081] {2}[Hardware Error]: Hardware error from APEI Generic Hardware Error Source: 1 [ 94.973770] {2}[Hardware Error]: event severity: recoverable [ 94.974334] {2}[Hardware Error]: Error 0, type: recoverable [ 94.974962] {2}[Hardware Error]: section_type: ARM processor error [ 94.975586] {2}[Hardware Error]: MIDR: 0x000000000000cd24 [ 94.976202] {2}[Hardware Error]: Multiprocessor Affinity Register (MPIDR): 0x000000000000ab12 [ 94.977011] {2}[Hardware Error]: error affinity level: 2 [ 94.977593] {2}[Hardware Error]: running state: 0x1 [ 94.978135] {2}[Hardware Error]: Power State Coordination Interface state: 4660 [ 94.978884] {2}[Hardware Error]: Error info structure 0: [ 94.979463] {2}[Hardware Error]: num errors: 3 [ 94.979971] {2}[Hardware Error]: first error captured [ 94.980523] {2}[Hardware Error]: propagated error captured [ 94.981110] {2}[Hardware Error]: overflow occurred, error info is incomplete [ 94.981893] {2}[Hardware Error]: error_type: 0x0006: cache error|TLB error [ 94.982606] {2}[Hardware Error]: error_info: 0x000000000091000f [ 94.983249] {2}[Hardware Error]: transaction type: Data Access [ 94.983891] {2}[Hardware Error]: cache error, operation type: Data write [ 94.984559] {2}[Hardware Error]: TLB error, operation type: Data write [ 94.985215] {2}[Hardware Error]: cache level: 2 [ 94.985749] {2}[Hardware Error]: TLB level: 2 [ 94.986277] {2}[Hardware Error]: processor context not corrupted And the error code is properly decoded according with table N.17 from UEFI 2.10 spec: [ 94.981893] {2}[Hardware Error]: error_type: 0x0006: cache error|TLB error The error injection logic was checked via QEMU using this patch: https://lore.kernel.org/all/20240621165115.336-1-shiju.jose@huawei.com/ v5: - Do some cleanups and minor fixes as suggested by Jonathan and Tony: - check errors at strscpy(); - simplify cper_bits_to_str() function; - use FIELD_GET() and for_each_set_bit(); - use ARRAY_SIZE() on infofx to let it clear that it should be size of newpfx + 1; - fix kernel-doc warning with W=1; - use kernel-doc for two exported functions at cper.c. v4: - The print function had some bugs on it, which was discovered with the help of an error injection tool I'm now using. v3: - It adds a helper function to produce a buffer describing the error bits at cper's printk and ghes pr_warn_bitrated. It also fixes a W=1 error while building cper. v2: - It fixes the way printks are handled on both cper_arm and ghes drivers. v1: - (tagged as RFC) was mostly to give a heads up that the current implementation is not following the spec. It also touches only cper code. Mauro Carvalho Chehab (4): efi/cper: Adjust infopfx size to accept an extra space efi/cper: Add a new helper function to print bitmasks efi/cper: align ARM CPER type with UEFI 2.9A/2.10 specs docs: efi: add CPER functions to driver-api .../driver-api/firmware/efi/index.rst | 11 ++-- drivers/acpi/apei/ghes.c | 15 +++--- drivers/firmware/efi/cper-arm.c | 52 +++++++++---------- drivers/firmware/efi/cper.c | 41 ++++++++++++++- include/linux/cper.h | 12 +++-- 5 files changed, 89 insertions(+), 42 deletions(-)