Received: by 2002:a05:7412:2a91:b0:fc:a2b0:25d7 with SMTP id u17csp489334rdh; Wed, 14 Feb 2024 03:06:10 -0800 (PST) X-Forwarded-Encrypted: i=3; AJvYcCXCvBLPmX9K3vTK8m0w+Jf8UaBK3IlxNdWjZeqDCHmFPo18uSxnFtDhuT8aedchxWqRM5u1EjT7kw3VK9BBGvu9NVHWTlgSgu7qgmuGpQ== X-Google-Smtp-Source: AGHT+IHN9sqwLEix5mxe23P1bWdpi6xSoM6Q2lwz+y+o4dXldc1Mhn4XQQoZ1Bp+SPTpcZ4v58nM X-Received: by 2002:a17:906:5f8e:b0:a3d:81f:9a5d with SMTP id a14-20020a1709065f8e00b00a3d081f9a5dmr1497646eju.11.1707908770392; Wed, 14 Feb 2024 03:06:10 -0800 (PST) ARC-Seal: i=2; a=rsa-sha256; t=1707908770; cv=pass; d=google.com; s=arc-20160816; b=MIzw736wXR0GToZ7IlhWYH8MN35JRlcoYMzY96uKhxcfvG4Y1aXXVT34C4jQ65KsoR oxjeJlXwhVq6KlKMLKPxOx/K6pg8sKlXlA0xH3u/WkQHxxF6/9elhzVsqnWaBGOUJNRk NJaErzt1tw0hugZmCAHJZJWwX2+Y2ZS4r6jqy29TeRWSWUvsDWOeaRfyy2aess4J2qv2 1z7sKZekOpsSFdyJ8e9z/4lvcyU5v+QHwpnu40lY5md383Y4dwN0hS5vcuz1vt0TfPZ/ d1JJwy0HUrMmROWWGZjvWeXzUnecxslzyF58IHf/cKH/PW/qM9L5mBo4+tfQVkX+L1r4 k2wQ== ARC-Message-Signature: i=2; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=in-reply-to:content-disposition:mime-version:list-unsubscribe :list-subscribe:list-id:precedence:references:message-id:subject:cc :to:from:date:dkim-signature; bh=RFhzM1mdJMfnEuHgaoIgi2HNPVK8ohL6VlPzvvVhHBg=; fh=EFO2v/dZYZWdMMS3z/9xqMJfKTN/5cHraUnBPNXj9zI=; b=jYSwawe/p8oDdtZbgOwDjEsgnQCH56096HZnbbhcafI90Mv00rzNbBPxbS6IT0bAx5 5PvSup80OaCtm/Kwg6UHnpHLa+fCqog4dB4jmpRfUI2R5KIszfYWdtOm/I//VZ+wJH2G LkJIwAqTK+UfnJ3nPXRRhQGhNV6NGIz9azz5IXTqETHlQz7j3P7XGD9I0O498wcYSRw2 98s/DqDpjOWJwhEXOmaEcjkmuF2AeAilZNqJbNr7AeYD/BaWxVyUFp4HL8s8sGEeIRNd 4S/0oJP0aUbz4i5RxScvWcZ0c83X5p4L5AV6HgLNaLpSzSvJDacodgU38r/Ht/yBQrbm 7L+A==; dara=google.com ARC-Authentication-Results: i=2; mx.google.com; dkim=pass header.i=@alien8.de header.s=alien8 header.b=fdS+gbDD; arc=pass (i=1 spf=pass spfdomain=alien8.de dkim=pass dkdomain=alien8.de dmarc=pass fromdomain=alien8.de); spf=pass (google.com: domain of linux-kernel+bounces-65097-linux.lists.archive=gmail.com@vger.kernel.org designates 2604:1380:4601:e00::3 as permitted sender) smtp.mailfrom="linux-kernel+bounces-65097-linux.lists.archive=gmail.com@vger.kernel.org"; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=alien8.de X-Forwarded-Encrypted: i=2; AJvYcCWdkHGOdiZ1BiF1AhgvZDDmBd3zDwZowIKWF3WIgP+8mAM72HjSBC8Dj6ZfVl4rrygzCeDggApfdIM3NLXF4Ff52dGhm3NZv54TSMKrCw== Return-Path: Received: from am.mirrors.kernel.org (am.mirrors.kernel.org. [2604:1380:4601:e00::3]) by mx.google.com with ESMTPS id ko22-20020a170907987600b00a3d32531688si734492ejc.105.2024.02.14.03.06.10 for (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 14 Feb 2024 03:06:10 -0800 (PST) Received-SPF: pass (google.com: domain of linux-kernel+bounces-65097-linux.lists.archive=gmail.com@vger.kernel.org designates 2604:1380:4601:e00::3 as permitted sender) client-ip=2604:1380:4601:e00::3; Authentication-Results: mx.google.com; dkim=pass header.i=@alien8.de header.s=alien8 header.b=fdS+gbDD; arc=pass (i=1 spf=pass spfdomain=alien8.de dkim=pass dkdomain=alien8.de dmarc=pass fromdomain=alien8.de); spf=pass (google.com: domain of linux-kernel+bounces-65097-linux.lists.archive=gmail.com@vger.kernel.org designates 2604:1380:4601:e00::3 as permitted sender) smtp.mailfrom="linux-kernel+bounces-65097-linux.lists.archive=gmail.com@vger.kernel.org"; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=alien8.de Received: from smtp.subspace.kernel.org (wormhole.subspace.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by am.mirrors.kernel.org (Postfix) with ESMTPS id 260AE1F2583F for ; Wed, 14 Feb 2024 11:06:10 +0000 (UTC) Received: from localhost.localdomain (localhost.localdomain [127.0.0.1]) by smtp.subspace.kernel.org (Postfix) with ESMTP id 5068918E2F; Wed, 14 Feb 2024 11:06:03 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (4096-bit key) header.d=alien8.de header.i=@alien8.de header.b="fdS+gbDD" Received: from mail.alien8.de (mail.alien8.de [65.109.113.108]) (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 9C61018E10; Wed, 14 Feb 2024 11:05:59 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=65.109.113.108 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1707908762; cv=none; b=rHkx4rcyLbv1zm+xygjpCmiMs2evJB6FFexDIY/EbsisVVPdhLdkwTGcma6/AsQn2bTnd8mZaE/ujSH9wHpP85qY+jEggFVDv/ALZq21r4/clyQyID1E5VLNwNwgOIniUIRgTomz6yuyIuojF4SZh3ipK5muqwCtTiiRZ15bYFQ= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1707908762; c=relaxed/simple; bh=yfyMflBKNtVGtU2ImfDEona8nwijQRrVLRbwSrI2atQ=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=f3LAIT3nd18xqPJEVAYJ/ckhvM1zHfCi5PI6CK3vMZrue0V28wKz9DiLm3JVwbOM8ZqL+3ASuR6cj0SuHlhfsCSqMr44wIRBoaPDykXff32IpSbgJqNPkCSFNRZi0WFppK3A4Niq5maNAVe5JM6EX6LpMgcAryDVbf64SM42hiI= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=alien8.de; spf=pass smtp.mailfrom=alien8.de; dkim=pass (4096-bit key) header.d=alien8.de header.i=@alien8.de header.b=fdS+gbDD; arc=none smtp.client-ip=65.109.113.108 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=alien8.de Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=alien8.de Received: from localhost (localhost.localdomain [127.0.0.1]) by mail.alien8.de (SuperMail on ZX Spectrum 128k) with ESMTP id 7B0A040E023B; Wed, 14 Feb 2024 11:05:57 +0000 (UTC) X-Virus-Scanned: Debian amavisd-new at mail.alien8.de Authentication-Results: mail.alien8.de (amavisd-new); dkim=pass (4096-bit key) header.d=alien8.de Received: from mail.alien8.de ([127.0.0.1]) by localhost (mail.alien8.de [127.0.0.1]) (amavisd-new, port 10026) with ESMTP id 4oMTBDzLIK7G; Wed, 14 Feb 2024 11:05:55 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=alien8.de; s=alien8; t=1707908755; bh=RFhzM1mdJMfnEuHgaoIgi2HNPVK8ohL6VlPzvvVhHBg=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=fdS+gbDDk820q13tmn01nLrKge4DftiKKp4/vca/XB0m67UKxVrQlna6EuNVHkqZG QRHOEZtUKD5KRVHctmRzXcN3XIJ75Ss5td7yTZJeAsZv8atbGS3mxgte+9Ob/gtWzH Tj604yrwrEvshmu96Mmc+mElqecvIgDpas6LwPDZXjgAdAZGux6dmVvm+x17hGZrKF r8BN340NUkcRr4j/YYPnMMTkgW+yVFbXr4X3doLigfGUPEwyKUa1d95ay1tSQU0/pD cbNT7aF+4iDnE3XagjMpWHtsy6fvG9BviKvGrOSq9MB5Kqqvlrt/lSRmZ9aggRRgOp LZyH/iU7Z5UZsQA9hcPaklUVbYukJSNvfPEytv+1Wz/clbFgPGyXL4TitGQqU+kmDh g7OZFJVJcUlRRsbDVUEE7TwTCng9lA+tQBVqekrXlIIOFRZRNhmm4ADhr54MQuDwVW DKbhjuSf35EY9+ZUjDVGlvC0jgbo4s2nkoQ7nynu5Dze4nQlX3Ts3vNLc+8CntFcls /znaiguEzz3koFjtVu09lkZ897d6BiZ4jvmegjXAP0rF0kwYGMg34e0cms431oE+vj C+fQKVZ/qQS9WuVsmHd0XgHyHO62wvx7DjIMLqVuIod1jPdEfbaw26BWS+kbLhlH/9 u1Twhe1dSJUaUm8kWc1yVTeY= Received: from zn.tnic (pd953021b.dip0.t-ipconnect.de [217.83.2.27]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange ECDHE (P-256) server-signature ECDSA (P-256) server-digest SHA256) (No client certificate requested) by mail.alien8.de (SuperMail on ZX Spectrum 128k) with ESMTPSA id 26B6C40E0192; Wed, 14 Feb 2024 11:05:46 +0000 (UTC) Date: Wed, 14 Feb 2024 12:05:41 +0100 From: Borislav Petkov To: Yazen Ghannam Cc: tony.luck@intel.com, linux-edac@vger.kernel.org, linux-kernel@vger.kernel.org, avadhut.naik@amd.com, john.allen@amd.com, muralidhara.mk@amd.com, naveenkrishna.chatradhi@amd.com, sathyapriya.k@amd.com Subject: Re: [PATCH 2/2] RAS: Introduce the FRU Memory Poison Manager Message-ID: <20240214110541.GFZcyehY44eSSYsW2l@fat_crate.local> References: <20240214033516.1344948-1-yazen.ghannam@amd.com> <20240214033516.1344948-3-yazen.ghannam@amd.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: <20240214033516.1344948-3-yazen.ghannam@amd.com> On Tue, Feb 13, 2024 at 09:35:16PM -0600, Yazen Ghannam wrote: > +static inline struct cper_fru_poison_desc *get_fpd(struct fru_rec *rec, u32 entry) > +{ > + return &rec->entries[entry]; > +} This one needs to go too. > +static inline u32 get_fmp_len(struct fru_rec *rec) > +{ > + return rec->sec_desc.section_length - sizeof(struct cper_section_descriptor); > +} Oh well, I guess we can keep that one. > +/* Calculate a new checksum. */ > +static u32 get_fmp_checksum(struct fru_rec *rec) > +{ > + struct cper_sec_fru_mem_poison *fmp = get_fmp(rec); > + u32 len, checksum; > + > + len = get_fmp_len(rec); > + > + /* Get the current total. */ > + checksum = do_fmp_checksum(fmp, len); > + > + /* Subtract the current checksum from total. */ > + checksum -= fmp->checksum; > + > + /* Return the compliment value. */ > + return 0 - checksum; > +} Let's get rid of that one. Also, I think it is called *complement* value and you simply do /* Use the complement value. */ rec->fmp.checksum = -checksum; I'd say. --- diff --git a/drivers/ras/amd/fmpm.c b/drivers/ras/amd/fmpm.c index 9eaf892e35b9..f8799beddcc4 100644 --- a/drivers/ras/amd/fmpm.c +++ b/drivers/ras/amd/fmpm.c @@ -195,11 +195,12 @@ static u32 do_fmp_checksum(struct cper_sec_fru_mem_poison *fmp, u32 len) return checksum; } -/* Calculate a new checksum. */ -static u32 get_fmp_checksum(struct fru_rec *rec) +static int update_record_on_storage(struct fru_rec *rec) { u32 len, checksum; + int ret; + /* Calculate a new checksum. */ len = get_fmp_len(rec); /* Get the current total. */ @@ -208,15 +209,8 @@ static u32 get_fmp_checksum(struct fru_rec *rec) /* Subtract the current checksum from total. */ checksum -= rec->fmp.checksum; - /* Return the compliment value. */ - return 0 - checksum; -} - -static int update_record_on_storage(struct fru_rec *rec) -{ - int ret; - - rec->fmp.checksum = get_fmp_checksum(rec); + /* Use the complement value. */ + rec->fmp.checksum = -checksum; pr_debug("Writing to storage"); -- Regards/Gruss, Boris. https://people.kernel.org/tglx/notes-about-netiquette