From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755194Ab1I1TS0 (ORCPT ); Wed, 28 Sep 2011 15:18:26 -0400 Received: from lennier.cc.vt.edu ([198.82.162.213]:52506 "EHLO lennier.cc.vt.edu" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753397Ab1I1TSZ (ORCPT ); Wed, 28 Sep 2011 15:18:25 -0400 X-Mailer: exmh version 2.7.2 01/07/2005 with nmh-1.3-dev To: Joerg Roedel Cc: Bjorn Helgaas , Joerg Roedel , Jesse Barnes , linux-pci@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH 4/4] PCI: Add support for PASID capability In-Reply-To: Your message of "Tue, 27 Sep 2011 00:15:39 +0200." <20110926221539.GG15002@8bytes.org> From: Valdis.Kletnieks@vt.edu References: <1316706551-16138-1-git-send-email-joerg.roedel@amd.com> <1316706551-16138-5-git-send-email-joerg.roedel@amd.com> <20110926221539.GG15002@8bytes.org> Mime-Version: 1.0 Content-Type: multipart/signed; boundary="==_Exmh_1317237495_2944P"; micalg=pgp-sha1; protocol="application/pgp-signature" Content-Transfer-Encoding: 7bit Date: Wed, 28 Sep 2011 15:18:15 -0400 Message-ID: <15060.1317237495@turing-police.cc.vt.edu> X-Mirapoint-Received-SPF: 198.82.161.152 auth3.smtp.vt.edu Valdis.Kletnieks@vt.edu 2 pass X-Junkmail-Status: score=10/50, host=steiner.cc.vt.edu X-Junkmail-Signature-Raw: score=unknown, refid=str=0001.0A020208.4E8372F8.00DB,ss=1,fgs=0, ip=0.0.0.0, so=2010-07-22 22:03:31, dmn=2009-09-10 00:05:08, mode=single engine X-Junkmail-IWF: false Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org --==_Exmh_1317237495_2944P Content-Type: text/plain; charset=us-ascii On Tue, 27 Sep 2011 00:15:39 +0200, Joerg Roedel said: > PASID stands for Process Address Space ID, it basically allows a PCI > device to access multiple IO address spaces at the same time using an > IOMMU. Users should enable it when they want to compile an IOMMU driver > into the kernel that supports PASIDs for the translated devices. > I'll add all that information to the Kconfig help. Thanks a lot for your > feedback :) Is this a case where the PCI device drivers in question should be doing a 'select' or 'depends on' if they support talking to an IOMMU using PASID? --==_Exmh_1317237495_2944P Content-Type: application/pgp-signature -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.11 (GNU/Linux) Comment: Exmh version 2.5 07/13/2001 iD8DBQFOg3L3cC3lWbTT17ARAgPiAKCRBQJ4KjD/sNFXHqFDBQKeLfG7VwCdHV6G rQR9ODIW9z9rI/AQdMlf9U4= =Sghw -----END PGP SIGNATURE----- --==_Exmh_1317237495_2944P--