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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 05D84C433F5 for ; Wed, 16 Mar 2022 20:48:25 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1358059AbiCPUti (ORCPT ); Wed, 16 Mar 2022 16:49:38 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:45402 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S243535AbiCPUtb (ORCPT ); Wed, 16 Mar 2022 16:49:31 -0400 Received: from mga09.intel.com (mga09.intel.com [134.134.136.24]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 663D45A5B0 for ; Wed, 16 Mar 2022 13:48:16 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1647463696; x=1678999696; h=date:from:to:cc:subject:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=q+FQmfaETXRwzuv/cK+SYKBKZ/3kdd4QXApm/25DTEQ=; b=dTmBJh3deyJfV4lU4WIsavjeij1mz27E+9ZXJljqpCDGdIYIK3o+1drL 3OqOUNDerVUggTJhjJYAgtyiYcduJ48D6ebGo5E3WrR0IQGP4kocU6JQD L4bOAAX75HQu9biF7HK46IpuK9tJcNi/O/QEZ21g32EAXMGEoim7j0hiH BghuQhvy3DwVeItR2M/70YMPutpbqjSjnoCageOiE+yyUNL5oa5eawS5B YNt7OGaO4M7pJ4kWBiVfoKGCnlu7zip5HDM+fn8yQTa0Lv1Ocq8fNsH3f hjk9XCSjmTRPS3X6v0i719JGUsN+HpPGmPyW0qdbv3g+AD6C3E1PXI0hj g==; X-IronPort-AV: E=McAfee;i="6200,9189,10288"; a="256435709" X-IronPort-AV: E=Sophos;i="5.90,187,1643702400"; d="scan'208";a="256435709" Received: from fmsmga001.fm.intel.com ([10.253.24.23]) by orsmga102.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 16 Mar 2022 13:48:15 -0700 X-IronPort-AV: E=Sophos;i="5.90,187,1643702400"; d="scan'208";a="690720627" Received: from jacob-builder.jf.intel.com (HELO jacob-builder) ([10.7.198.157]) by fmsmga001-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 16 Mar 2022 13:48:14 -0700 Date: Wed, 16 Mar 2022 13:51:31 -0700 From: Jacob Pan To: "Tian, Kevin" Cc: "iommu@lists.linux-foundation.org" , LKML , Joerg Roedel , "Jason Gunthorpe" , Christoph Hellwig , Lu Baolu , Jean-Philippe Brucker , "Pan, Jacob jun" , "Raj, Ashok" , "Kumar, Sanjay K" , "Jiang, Dave" , "Luck, Tony" , "Zanussi, Tom" , "Williams, Dan J" , "Liu, Yi L" , jacob.jun.pan@linux.intel.com Subject: Re: [PATCH v2 3/8] iommu/vt-d: Implement device_pasid domain attach ops Message-ID: <20220316135131.44c666ee@jacob-builder> In-Reply-To: References: <20220315050713.2000518-1-jacob.jun.pan@linux.intel.com> <20220315050713.2000518-4-jacob.jun.pan@linux.intel.com> Organization: OTC X-Mailer: Claws Mail 3.17.5 (GTK+ 2.24.32; x86_64-pc-linux-gnu) MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi Kevin, On Wed, 16 Mar 2022 07:39:09 +0000, "Tian, Kevin" wrote: > > From: Jacob Pan > > Sent: Tuesday, March 15, 2022 1:07 PM > > +static int intel_iommu_attach_dev_pasid(struct iommu_domain *domain, > > + struct device *dev, ioasid_t > > pasid) +{ > > + struct dmar_domain *dmar_domain = to_dmar_domain(domain); > > + struct device_domain_info *info = get_domain_info(dev); > > + struct intel_iommu *iommu = info->iommu; > > + struct pasid_info *pinfo; > > + unsigned long flags; > > + int ret = 0; > > + void *entry; > > + > > + if (!info) > > + return -ENODEV; > > btw this interface only works in scalable mode. Lack of a check to > return error on legacy mode here. > right, legacy mode has no PASIDs. will check Thanks, Jacob