From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756678Ab0CJOxj (ORCPT ); Wed, 10 Mar 2010 09:53:39 -0500 Received: from mx1.redhat.com ([209.132.183.28]:43140 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756600Ab0CJOxh (ORCPT ); Wed, 10 Mar 2010 09:53:37 -0500 Message-ID: <4B97B269.3010502@redhat.com> Date: Wed, 10 Mar 2010 16:53:29 +0200 From: Avi Kivity User-Agent: Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.1.8) Gecko/20100301 Fedora/3.0.3-1.fc12 Thunderbird/3.0.3 MIME-Version: 1.0 To: Joerg Roedel CC: Marcelo Tosatti , Alexander Graf , kvm@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH 02/18] KVM: MMU: Make tdp_enabled a mmu-context parameter References: <1267643541-451-1-git-send-email-joerg.roedel@amd.com> <1267643541-451-3-git-send-email-joerg.roedel@amd.com> <4B94C0B5.7080507@redhat.com> <20100310144426.GK5619@amd.com> In-Reply-To: <20100310144426.GK5619@amd.com> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 03/10/2010 04:44 PM, Joerg Roedel wrote: > On Mon, Mar 08, 2010 at 11:17:41AM +0200, Avi Kivity wrote: > >> On 03/03/2010 09:12 PM, Joerg Roedel wrote: >> >>> This patch changes the tdp_enabled flag from its global >>> meaning to the mmu-context. This is necessary for Nested SVM >>> with emulation of Nested Paging where we need an extra MMU >>> context to shadow the Nested Nested Page Table. >>> >>> >>> diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h >>> index ec891a2..e7bef19 100644 >>> --- a/arch/x86/include/asm/kvm_host.h >>> +++ b/arch/x86/include/asm/kvm_host.h >>> @@ -254,6 +254,7 @@ struct kvm_mmu { >>> int root_level; >>> int shadow_root_level; >>> union kvm_mmu_page_role base_role; >>> + bool tdp_enabled; >>> >>> >> This needs a different name, since the old one is still around. >> Perhaps we could call it parent_mmu and make it a kvm_mmu pointer. >> > Hmm, how about renaming the global tdp_enabled variable to tdp_usable? > The global variable indicates if tdp is _usable_ and we can _enable_ it > for a mmu context. > I think of the global flags as host tdp, and the mmu as guest tdp (but maybe this is wrong?). If that makes sense, the naming should reflect that. -- error compiling committee.c: too many arguments to function