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=-2.3 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_SANE_1 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 CB193C433DF for ; Sun, 17 May 2020 17:56:41 +0000 (UTC) Received: from lists.xenproject.org (lists.xenproject.org [192.237.175.120]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id A3F2B20758 for ; Sun, 17 May 2020 17:56:41 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org A3F2B20758 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=antioche.eu.org Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=xen-devel-bounces@lists.xenproject.org Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1jaNWH-0004eF-0l; Sun, 17 May 2020 17:56:13 +0000 Received: from us1-rack-iad1.inumbo.com ([172.99.69.81]) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1jaNWF-0004dj-M7 for xen-devel@lists.xenproject.org; Sun, 17 May 2020 17:56:11 +0000 X-Inumbo-ID: b0ad470a-9867-11ea-b07b-bc764e2007e4 Received: from chassiron.antioche.eu.org (unknown [2001:41d0:fe9d:1101::1]) by us1-rack-iad1.inumbo.com (Halon) with ESMTPS id b0ad470a-9867-11ea-b07b-bc764e2007e4; Sun, 17 May 2020 17:56:10 +0000 (UTC) Received: from rochebonne.antioche.eu.org (rochebonne [IPv6:2001:41d0:fe9d:1100:221:70ff:fe0c:9885]) by chassiron.antioche.eu.org (8.15.2/8.15.2) with ESMTP id 04HHu79t023460; Sun, 17 May 2020 19:56:07 +0200 (MEST) Received: by rochebonne.antioche.eu.org (Postfix, from userid 1210) id 23E682810; Sun, 17 May 2020 19:56:07 +0200 (CEST) Date: Sun, 17 May 2020 19:56:07 +0200 From: Manuel Bouyer To: Andrew Cooper Subject: Re: IOCTL_PRIVCMD_MMAPBATCH on Xen 4.13.0 Message-ID: <20200517175607.GA8793@antioche.eu.org> References: <20200515202912.GA11714@antioche.eu.org> <20200515210629.GA10976@antioche.eu.org> <20200515215335.GA9991@antioche.eu.org> <20200517173259.GA7285@antioche.eu.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20200517173259.GA7285@antioche.eu.org> User-Agent: Mutt/1.12.1 (2019-06-15) X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.4.3 (chassiron.antioche.eu.org [IPv6:2001:41d0:fe9d:1101:0:0:0:1]); Sun, 17 May 2020 19:56:07 +0200 (MEST) X-BeenThere: xen-devel@lists.xenproject.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Xen developer discussion List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Cc: xen-devel@lists.xenproject.org Errors-To: xen-devel-bounces@lists.xenproject.org Sender: "Xen-devel" On Sun, May 17, 2020 at 07:32:59PM +0200, Manuel Bouyer wrote: > I've been looking a bit deeper in the Xen kernel. > The mapping is failed in ./arch/x86/mm/p2m.c:p2m_get_page_from_gfn(), > /* Error path: not a suitable GFN at all */ > if ( !p2m_is_ram(*t) && !p2m_is_paging(*t) && !p2m_is_pod(*t) ) { > gdprintk(XENLOG_ERR, "p2m_get_page_from_gfn2: %d is_ram %ld is_paging %ld is_pod %ld\n", *t, p2m_is_ram(*t), p2m_is_paging(*t), p2m_is_pod(*t) ); > return NULL; > } > > *t is 4, which translates to p2m_mmio_dm > > it looks like p2m_get_page_from_gfn() is not ready to handle this case > for dom0. And so it looks like I need to implement osdep_xenforeignmemory_map_resource() for NetBSD -- Manuel Bouyer NetBSD: 26 ans d'experience feront toujours la difference --