From mboxrd@z Thu Jan 1 00:00:00 1970 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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 8CD51C43334 for ; Tue, 12 Jul 2022 15:04:23 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:Subject:In-Reply-To: Message-ID:To:From:Date:Reply-To:Cc:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: References:List-Owner; bh=V4en66bOpdr24j1xh5kDgfXefPloNWa3aKXy2Zaggn0=; b=BfD 21FxkyoFw2m4oL77jntE55Qm9JKWQxuE4x7N6LUqEjnbREPROfDJznS0tDlx/jGh2nT2kqDHnbsEA zsr1DNBekOzxkYy25/rpReS1mcRNzRQ6eFk/gHERK7mGtFrHmR1oqkCihIY5yM9sdk1RbXpAKIg9Q 4Rrc7Z1cNt+4UX2q74/nWFz07cm780U1Dx48yWAio9IbJGIs2FQL0GCQQ5+NTUNnVNTYfH6FpmzA7 CScNFDGb1Fwsij+YVYruv8UW4VWb0qM3cl9YyLalk/fDVMntvAqc9qE2bR+QVzQjD6tRqgu8PK2F0 l4Ne0jD78A6KIpWNRPoC8UVozy68wEQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1oBHPQ-00BwnT-1U; Tue, 12 Jul 2022 15:02:44 +0000 Received: from sender4-op-o14.zoho.com ([136.143.188.14]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1oBHPM-00BwiK-IB for linux-arm-kernel@lists.infradead.org; Tue, 12 Jul 2022 15:02:41 +0000 ARC-Seal: i=1; a=rsa-sha256; t=1657638155; cv=none; d=zohomail.com; s=zohoarc; b=bxoItgRLAIPqF5PSnhTX5zXL0b5WqINiKMorBvoGqadB0CTPyaZkrckGytN0XdQOMRRdyuwtM1nLy7OTuu0FFyFJVgLFHqX4ixJbjQnvgEofQyoeh2v/fRpgznj71ghA2QoHv6aIbghENaGIGJ7Qc7NmNOXo6kB+nmwlPF5kYG0= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1657638155; h=Content-Type:Content-Transfer-Encoding:Date:From:MIME-Version:Message-ID:Subject:To; bh=HxDOQB9IItXd1PAToFLY8sxjTcmEweYLueve7X8+iNw=; b=dVGDyyM76iUmH20oG/9S9HUXXexJkR85Gml9vpOtYexoMwkX8kaRwS/75sSlRyzk6FhnM5HqDpcoPx54GwngNfcJT1IFIAhbTD5bXY/mEujBvwfrYxRfneeMZjgZ08bipKBB14134Y6nahUgtg0n8Qn1DLmmR7jqfsI3h67vdRk= ARC-Authentication-Results: i=1; mx.zohomail.com; dkim=pass header.i=linux.beauty; spf=pass smtp.mailfrom=me@linux.beauty; dmarc=pass header.from= DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; t=1657638155; s=zmail; d=linux.beauty; i=me@linux.beauty; h=Date:Date:From:From:To:To:Message-ID:In-Reply-To:Subject:Subject:MIME-Version:Content-Type:Content-Transfer-Encoding:Message-Id:Reply-To:Cc; bh=HxDOQB9IItXd1PAToFLY8sxjTcmEweYLueve7X8+iNw=; b=mKGIvWTwpozAYiZA3P4y7QZGWsfW4pQ0ScxQS2YwrlUi9dCNqDtYFiRpD7gv7l4r ecUT5fTEv0Wp1DiKHB5meFkl6f2xrZnm1ahveC1idmzlXYS+3bGuKie0vQ5k0vY7cD3 Kni3jd36UAr/0g1b7txdBzv/+vAVqVoGlYDzBCLA= Received: from mail.zoho.com by mx.zohomail.com with SMTP id 1657638153657161.58865517700565; Tue, 12 Jul 2022 08:02:33 -0700 (PDT) Date: Tue, 12 Jul 2022 23:02:33 +0800 From: Li Chen To: "linux-arm-kernel" Message-ID: <181f2eeeda0.e0e88feb706179.5112306564526283358@linux.beauty> In-Reply-To: Subject: Is it possible to run a linux on multiple clusters if CCI is missing MIME-Version: 1.0 Importance: Medium User-Agent: Zoho Mail X-Mailer: Zoho Mail X-Bad-Reply: In-Reply-To but no 'Re:' in Subject. X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220712_080240_699666_DDF85AE6 X-CRM114-Status: GOOD ( 10.68 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Hi all, Say that if one SoC has 4 clusters, and each cluster has an A78. Every A78 has its own SCU to maintain cache coherence, but this SoC doesn't have CCI, so there is no hardware to maintain cache coherence between the 4 clusters. My question: is it possible to run a single Linux kernel on 4 clusters? If so, how to do it and how can the cluster cache coherence be maintained? Regards, Li _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel