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 X-Spam-Level: X-Spam-Status: No, score=-7.1 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS,USER_AGENT_GIT autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id AF9D0C2D0A3 for ; Thu, 29 Oct 2020 21:09:39 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 55A1B20790 for ; Thu, 29 Oct 2020 21:09:39 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1604005779; bh=bNbPFZ+4DbPibhlFNfuibwuRNeDZSwZ0ygc8fqBSEso=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=IsmHpQ0FB6EScfgZOvKBFo9P7AWMoI+3yPSybNe6u3ntqoKNO4KlYkrLacXD7WQKE yEAUJNYkGQbXR2cpjDbGwNfzUA/XUV2aYJwJSO51EOdjWvzPHVIHNJekWI+TtfwogG j5O7weWVI7LXKeXltTM9Ml4UYbIi0AeSTgwjvOSc= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726663AbgJ2VJ2 (ORCPT ); Thu, 29 Oct 2020 17:09:28 -0400 Received: from mail.kernel.org ([198.145.29.99]:53052 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726090AbgJ2VJ1 (ORCPT ); Thu, 29 Oct 2020 17:09:27 -0400 Received: from disco-boy.misterjones.org (disco-boy.misterjones.org [51.254.78.96]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id CFCE420791; Thu, 29 Oct 2020 21:09:26 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1604005767; bh=bNbPFZ+4DbPibhlFNfuibwuRNeDZSwZ0ygc8fqBSEso=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=p+kQZbYrYBtdwLNzDpLO4xgvoAw33UrM4AZ9Vm3XFrSUqiLsAZz6hSVqxwuqjaGQS rkJOWxbt6QipcUUYHIwQz7DFD+WKQP52hhvc6QIWijpQqAGUmzSDT4VqdQ/vKuxN+V gkgw64VolyF/d5oAd3iurvvf3VsSAzdRSL2hAdyM= Received: from 78.163-31-62.static.virginmediabusiness.co.uk ([62.31.163.78] helo=wait-a-minute.lan) by disco-boy.misterjones.org with esmtpsa (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.94) (envelope-from ) id 1kYFAi-005YNy-Gh; Thu, 29 Oct 2020 21:09:24 +0000 From: Marc Zyngier To: kvmarm@lists.cs.columbia.edu, Gavin Shan Cc: shan.gavin@gmail.com, will@kernel.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH v2] KVM: arm64: Failback on unsupported huge page sizes Date: Thu, 29 Oct 2020 21:09:15 +0000 Message-Id: <160400571841.9348.15515000266981677007.b4-ty@kernel.org> X-Mailer: git-send-email 2.28.0 In-Reply-To: <20201025230626.18501-1-gshan@redhat.com> References: <20201025230626.18501-1-gshan@redhat.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-SA-Exim-Connect-IP: 62.31.163.78 X-SA-Exim-Rcpt-To: kvmarm@lists.cs.columbia.edu, gshan@redhat.com, shan.gavin@gmail.com, will@kernel.org, linux-kernel@vger.kernel.org X-SA-Exim-Mail-From: maz@kernel.org X-SA-Exim-Scanned: No (on disco-boy.misterjones.org); SAEximRunCond expanded to false Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Mon, 26 Oct 2020 10:06:26 +1100, Gavin Shan wrote: > The huge page could be mapped through multiple contiguous PMDs or PTEs. > The corresponding huge page sizes aren't supported by the page table > walker currently. > > This fails the unsupported huge page sizes to the near one. Otherwise, > the guest can't boot successfully: CONT_PMD_SHIFT and CONT_PTE_SHIFT > fail back to PMD_SHIFT and PAGE_SHIFT separately. Applied to next, thanks! [1/1] KVM: arm64: Use fallback mapping sizes for contiguous huge page sizes commit: 2f40c46021bbb3ecd5c5f05764ecccbc276bc690 Cheers, M. -- Without deviation from the norm, progress is not possible.