From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757502AbcAYPk7 (ORCPT ); Mon, 25 Jan 2016 10:40:59 -0500 Received: from aserp1050.oracle.com ([141.146.126.70]:32757 "EHLO aserp1050.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752388AbcAYPk5 (ORCPT ); Mon, 25 Jan 2016 10:40:57 -0500 X-Greylist: delayed 569 seconds by postgrey-1.27 at vger.kernel.org; Mon, 25 Jan 2016 10:40:56 EST Subject: Re: [PATCH v1 01/12] x86/smp: Make start_secondary() and initial_pg_pmd visible globally To: David Vrabel , konrad.wilk@oracle.com References: <1453498558-6028-1-git-send-email-boris.ostrovsky@oracle.com> <1453498558-6028-2-git-send-email-boris.ostrovsky@oracle.com> <56A5FE91.60508@citrix.com> Cc: xen-devel@lists.xenproject.org, linux-kernel@vger.kernel.org, roger.pau@citrix.com, mcgrof@suse.com From: Boris Ostrovsky Message-ID: <56A63F92.80500@oracle.com> Date: Mon, 25 Jan 2016 10:30:26 -0500 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:38.0) Gecko/20100101 Thunderbird/38.1.0 MIME-Version: 1.0 In-Reply-To: <56A5FE91.60508@citrix.com> Content-Type: text/plain; charset=windows-1252; format=flowed Content-Transfer-Encoding: 7bit X-Source-IP: userp1040.oracle.com [156.151.31.81] Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 01/25/2016 05:53 AM, David Vrabel wrote: > On 22/01/16 21:35, Boris Ostrovsky wrote: >> Xen's HVMlite guests will want to use them. > Please explain in detail why they are needed. > Actually, start_secondary is not needed anymore, I removed its use at some point. initial_pg_pmd (together with initial_page_table) are not really required --- I just used them for temporary page tables in the hvmlite startup code instead of allocating dedicated pages for that. Perhaps there is other (Xen-specific) area that I can use for that. Once we jump to startup_32 these tables are no longer in use. -boris