From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received-SPF: Pass (sender SPF authorized) identity=mailfrom; client-ip=2a00:1450:4864:20::444; helo=mail-wr1-x444.google.com; envelope-from=leif.lindholm@linaro.org; receiver=edk2-devel@lists.01.org Received: from mail-wr1-x444.google.com (mail-wr1-x444.google.com [IPv6:2a00:1450:4864:20::444]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by ml01.01.org (Postfix) with ESMTPS id 1BA4521B02822 for ; Wed, 14 Nov 2018 09:27:24 -0800 (PST) Received: by mail-wr1-x444.google.com with SMTP id v18-v6so18197504wrt.8 for ; Wed, 14 Nov 2018 09:27:23 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=date:from:to:cc:subject:message-id:references:mime-version :content-disposition:in-reply-to:user-agent; bh=Bs7ghxb1lcHEaNvMqmsP1uQpp6h53CypIp8mGc/TWJU=; b=aT+8k7olI0Ys2QfU3P5KIu5P8mkqAhIDwn3y3q8nbrDXU/yAMfnpL6AKcmSMEBdbZp 0VHE2HF5fMg9RISWxYKH/AvBpXltdz+D3l2jgOsIq6j61gD6sJHKq5adn5mRsA1yy2+t 4A8bY5pEEeFLyYhCkehZ5U00fuERgYbsEMz3I= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:from:to:cc:subject:message-id:references :mime-version:content-disposition:in-reply-to:user-agent; bh=Bs7ghxb1lcHEaNvMqmsP1uQpp6h53CypIp8mGc/TWJU=; b=kcbUYAbgCIOUniW4b8+rYtOd+BBukitNFBR4HIwGoYsyiaRTXq/NYGnxqAc/jL3BJ1 uvrVrqgsy09uL+b0nENcIG7Ljkc5lgrFvKPvZ7zaWqOwADKppTvoNeyUNJAm3uyA8AKK 7WidJ3ATPaeNDZVWXWkwWcNQbkq61xS/2I1J+aGe+Z/+3yAdolO+UEhlvVFwCKZ5d3Vh YVuST3mQ3L43htPVAjDJRvHtR3H51EbRmhx5oZ9D1sG5ReA/62pKR9anVxhmRS3MFQRU umv/2PVFPLnrJTy38d1eAdDKGAOCMlxp5fCc/k8P+zAZcTyiPFx5Pkw7lCVtFDW6J7ox SRug== X-Gm-Message-State: AGRZ1gL3fm84e1ixxaoDW2y1BcRPxCZhDkz7y9+FIohbrp2s3t+Ah1KB YtrgT46+kroVQUqvh4CHdK6jvg== X-Google-Smtp-Source: AJdET5cDCFg+UGL14SHrV63cpeIxxh624ePZ4NQ1cemRjLeoPRuwOnhgD47KIsNGupRZQ5I+4h4s6A== X-Received: by 2002:adf:a386:: with SMTP id l6-v6mr2888965wrb.110.1542216442436; Wed, 14 Nov 2018 09:27:22 -0800 (PST) Received: from bivouac.eciton.net (bivouac.eciton.net. [2a00:1098:0:86:1000:23:0:2]) by smtp.gmail.com with ESMTPSA id j129-v6sm18434614wmb.47.2018.11.14.09.27.21 (version=TLS1_2 cipher=ECDHE-RSA-CHACHA20-POLY1305 bits=256/256); Wed, 14 Nov 2018 09:27:21 -0800 (PST) Date: Wed, 14 Nov 2018 17:27:20 +0000 From: Leif Lindholm To: Prasanth Pulla Cc: Ming Huang , "linaro-uefi@lists.linaro.org" , "edk2-devel@lists.01.org" , "graeme.gregory@linaro.org" , "ard.biesheuvel@linaro.org" , "michael.d.kinney@intel.com" , "lersek@redhat.com" , "wanghuiqiang@huawei.com" , "huangming23@huawei.com" , "zhangjinsong2@huawei.com" , "huangdaode@hisilicon.com" , "john.garry@huawei.com" , "xinliang.liu@linaro.org" , "zhangfeng56@huawei.com" Message-ID: <20181114172719.l65qglyy5aqmonlt@bivouac.eciton.net> References: <20181029035111.53262-1-ming.huang@linaro.org> <20181029035111.53262-5-ming.huang@linaro.org> <20181114010543.vdrerefiijuec4y5@bivouac.eciton.net> MIME-Version: 1.0 In-Reply-To: User-Agent: NeoMutt/20170113 (1.7.2) Subject: Re: [PATCH edk2-non-osi v1 4/4] Hisilicon/D06: Fix SBSA PE-15 failed issue X-BeenThere: edk2-devel@lists.01.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: EDK II Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 14 Nov 2018 17:27:24 -0000 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline On Wed, Nov 14, 2018 at 08:53:55AM +0000, Prasanth Pulla wrote: > > > The result in DDR may rewrite by cache data. The essence of this > > > problem is that primary core and slave core access the same area with > > > different cache attribute. > > > Configure L3T register to fix this issue; > > > > Does this change have any performance implications? > > > > Prasanth: would PE test 15 not be _expected_ to fail if primary and > > secondary cores access the buffers with different cachability attributes? > > No this is not expected. I will work with the team and see if we can > enhance the ACS code to detect this and work in this scenario. But the architecture itself does not guarantee this scenario should work? / Leif