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 E6658C761AF for ; Tue, 21 Mar 2023 06:16:17 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230161AbjCUGQQ (ORCPT ); Tue, 21 Mar 2023 02:16:16 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:43894 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229992AbjCUGQN (ORCPT ); Tue, 21 Mar 2023 02:16:13 -0400 Received: from mga12.intel.com (mga12.intel.com [192.55.52.136]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 96DDF7EE6; Mon, 20 Mar 2023 23:16:12 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1679379372; x=1710915372; h=message-id:date:mime-version:cc:subject:to:references: from:in-reply-to:content-transfer-encoding; bh=IfVWlROUvFTg3fbNGSjW4+BuBAC1kv1Hcw4K8n9PyBc=; b=StXiblce0dRu4LioTmcpAUUGVgnsxPakZjTEddHrbAyNmFNo9ftrMVtP evhWGtaQEr3g+4b0Lk8HW6k3HFsfmbWiFOCPVdrSPeO1ios5R6r5KMvFF DzHZnPfBCqSScsesCoC0hFjC956TObOHNbqIYC5D627FrK2cisLEayJWU raR9gWGbVb/fOSRaPMdExjFbfa8cZc3PmDcROzAKcGoyi58pJgI/cVyeB hyg2HOIq9m0HlMETr10CK9EltHMchIA08nI40aW/uGxRs5/nwWHbDNZ21 T8proY9FwOH9r5Yc6cI4+tyfWZ9rcqS2EWSTgT4FOu2zdH/6UJT7W/z/G g==; X-IronPort-AV: E=McAfee;i="6600,9927,10655"; a="318509560" X-IronPort-AV: E=Sophos;i="5.98,278,1673942400"; d="scan'208";a="318509560" Received: from orsmga004.jf.intel.com ([10.7.209.38]) by fmsmga106.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 20 Mar 2023 23:16:12 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10655"; a="805198423" X-IronPort-AV: E=Sophos;i="5.98,278,1673942400"; d="scan'208";a="805198423" Received: from allen-box.sh.intel.com (HELO [10.239.159.48]) ([10.239.159.48]) by orsmga004.jf.intel.com with ESMTP; 20 Mar 2023 23:16:05 -0700 Message-ID: <00ee54f0-52c9-8f35-fdc4-aa3c3cd9e755@linux.intel.com> Date: Tue, 21 Mar 2023 14:14:53 +0800 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:102.0) Gecko/20100101 Thunderbird/102.7.1 Cc: baolu.lu@linux.intel.com, Will Deacon , David Woodhouse , Raj Ashok , "Tian, Kevin" , Yi Liu , "Yu, Fenghua" , Dave Jiang , Kirill Shutemov , Tony Luck Subject: Re: [PATCH v7 4/7] iommu/sva: Stop using ioasid_set for SVA Content-Language: en-US To: Jacob Pan , LKML , iommu@lists.linux.dev, Jason Gunthorpe , Joerg Roedel , Jean-Philippe Brucker , Robin Murphy , Dave Hansen , Thomas Gleixner , X86 Kernel , bp@alien8.de, "H. Peter Anvin" , Peter Zijlstra , corbet@lwn.net, vkoul@kernel.org, dmaengine@vger.kernel.org, linux-doc@vger.kernel.org References: <20230320185910.2643260-1-jacob.jun.pan@linux.intel.com> <20230320185910.2643260-5-jacob.jun.pan@linux.intel.com> From: Baolu Lu In-Reply-To: <20230320185910.2643260-5-jacob.jun.pan@linux.intel.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 3/21/23 2:59 AM, Jacob Pan wrote: > From: Jason Gunthorpe > > Instead SVA drivers can use a simple global IDA to allocate PASIDs for > each mm_struct. > > Future work would be to allow drivers using the SVA APIs to reserve global > PASIDs from this IDA for their internal use, eg with the DMA API PASID > support. > > Signed-off-by: Jason Gunthorpe > Signed-off-by: Jacob Pan Reviewed-by: Lu Baolu Best regards, baolu