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=-0.6 required=3.0 tests=DKIM_INVALID,DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS 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 BEDADC433E0 for ; Thu, 14 May 2020 05:51:37 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 8C608205CB for ; Thu, 14 May 2020 05:51:37 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b="Px07Vdw5" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1725911AbgENFvg (ORCPT ); Thu, 14 May 2020 01:51:36 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:39120 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-FAIL-OK-FAIL) by vger.kernel.org with ESMTP id S1725794AbgENFvg (ORCPT ); Thu, 14 May 2020 01:51:36 -0400 Received: from bombadil.infradead.org (bombadil.infradead.org [IPv6:2607:7c80:54:e::133]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 426CBC061A0C for ; Wed, 13 May 2020 22:51:36 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=bombadil.20170209; h=In-Reply-To:Content-Type:MIME-Version :References:Message-ID:Subject:Cc:To:From:Date:Sender:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description; bh=lHQOBRbPUcOA6NMwZdI6zLolOSP00QCntLQdV40Av9E=; b=Px07Vdw5BpOFOzujPzASdTSwFW bjuw5xdheRtkq0QEcHGcQqzmfHrO+zwDb8uEXhN5/5kjnBvkrCs3PMFIff20rlMpUH0GR75GZrv0M 42zdElDOf2GKoOAlEcaK5eiOJM3869hphcggLE384dQe0Tk5wCKFcoXyFrFQdwVDmdiZHgDjPksD/ jQMk2B9zA6dY6/JNbJiZVj4lEPJM7DrM6gfx3+bfMEeXsnKuEyDZ1fX0JY8eXFLIfEIIF3xlA2sg5 W0EFzo64gCt+OWNnuV7lMh+r9sUGY5UMqtZpAZH7iBKkGSwm1MjOzUv31lhD6wtXMqEUUWWmiYoSJ SVDiaEbg==; Received: from hch by bombadil.infradead.org with local (Exim 4.92.3 #3 (Red Hat Linux)) id 1jZ6mK-0003fq-Ed; Thu, 14 May 2020 05:51:32 +0000 Date: Wed, 13 May 2020 22:51:32 -0700 From: Christoph Hellwig To: Jacob Pan Cc: Lu Baolu , iommu@lists.linux-foundation.org, LKML , Joerg Roedel , David Woodhouse , Jean-Philippe Brucker , Eric Auger , Yi Liu , "Tian, Kevin" , Raj Ashok , Alex Williamson , Christoph Hellwig , Jonathan Cameron Subject: Re: [PATCH v13 2/8] iommu/vt-d: Use a helper function to skip agaw for SL Message-ID: <20200514055132.GB22388@infradead.org> References: <1589410909-38925-1-git-send-email-jacob.jun.pan@linux.intel.com> <1589410909-38925-3-git-send-email-jacob.jun.pan@linux.intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1589410909-38925-3-git-send-email-jacob.jun.pan@linux.intel.com> X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org. See http://www.infradead.org/rpr.html Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, May 13, 2020 at 04:01:43PM -0700, Jacob Pan wrote: > An Intel iommu domain uses 5-level page table by default. If the > iommu that the domain tries to attach supports less page levels, > the top level page tables should be skipped. Add a helper to do > this so that it could be used in other places. Please use up all 73 chars for the commit log.