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=-2.2 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,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 3C8B8C47247 for ; Thu, 7 May 2020 06:47:50 +0000 (UTC) Received: from silver.osuosl.org (smtp3.osuosl.org [140.211.166.136]) (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 0EB022078C for ; Thu, 7 May 2020 06:47:49 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 0EB022078C Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=linux.intel.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=iommu-bounces@lists.linux-foundation.org Received: from localhost (localhost [127.0.0.1]) by silver.osuosl.org (Postfix) with ESMTP id BCA5F204C5; Thu, 7 May 2020 06:47:49 +0000 (UTC) X-Virus-Scanned: amavisd-new at osuosl.org Received: from silver.osuosl.org ([127.0.0.1]) by localhost (.osuosl.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 36kI7XHrlH0M; Thu, 7 May 2020 06:47:48 +0000 (UTC) Received: from lists.linuxfoundation.org (lf-lists.osuosl.org [140.211.9.56]) by silver.osuosl.org (Postfix) with ESMTP id 31A2F20763; Thu, 7 May 2020 06:47:48 +0000 (UTC) Received: from lf-lists.osuosl.org (localhost [127.0.0.1]) by lists.linuxfoundation.org (Postfix) with ESMTP id 1688FC0859; Thu, 7 May 2020 06:47:48 +0000 (UTC) Received: from hemlock.osuosl.org (smtp2.osuosl.org [140.211.166.133]) by lists.linuxfoundation.org (Postfix) with ESMTP id EC57EC07FF for ; Thu, 7 May 2020 06:47:45 +0000 (UTC) Received: from localhost (localhost [127.0.0.1]) by hemlock.osuosl.org (Postfix) with ESMTP id D40D088865 for ; Thu, 7 May 2020 06:47:45 +0000 (UTC) X-Virus-Scanned: amavisd-new at osuosl.org Received: from hemlock.osuosl.org ([127.0.0.1]) by localhost (.osuosl.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 3QaldZgEW2Be for ; Thu, 7 May 2020 06:47:45 +0000 (UTC) X-Greylist: domain auto-whitelisted by SQLgrey-1.7.6 Received: from mga06.intel.com (mga06.intel.com [134.134.136.31]) by hemlock.osuosl.org (Postfix) with ESMTPS id 4AEE58885F for ; Thu, 7 May 2020 06:47:45 +0000 (UTC) IronPort-SDR: zFrpdPAN4GxWJopKw/tiIWGhmHuaJ99F8u5OwYU3y+hAJJefnBfxhQN9OF/oGK03CmDiEMQt7/ fondz4hRlLgw== X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from orsmga003.jf.intel.com ([10.7.209.27]) by orsmga104.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 06 May 2020 23:47:44 -0700 IronPort-SDR: 5pgQX32zHuoaoJHS0ypm2zrWQM8pnclLJQUVs6cFKCishwiQrOTaJJ+NBWZHQnrRUCq8v9KmQl AXNNhZ/1Fliw== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.73,362,1583222400"; d="scan'208";a="260429256" Received: from blu2-mobl3.ccr.corp.intel.com (HELO [10.249.169.187]) ([10.249.169.187]) by orsmga003.jf.intel.com with ESMTP; 06 May 2020 23:47:42 -0700 Subject: Re: [PATCH v4 0/5] iommu/vt-d: Add page request draining support To: "Tian, Kevin" , Joerg Roedel References: <20200507005534.3080-1-baolu.lu@linux.intel.com> From: Lu Baolu Message-ID: Date: Thu, 7 May 2020 14:47:42 +0800 User-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:68.0) Gecko/20100101 Thunderbird/68.7.0 MIME-Version: 1.0 In-Reply-To: Content-Language: en-US Cc: "Raj, Ashok" , "linux-kernel@vger.kernel.org" , "iommu@lists.linux-foundation.org" X-BeenThere: iommu@lists.linux-foundation.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Development issues for Linux IOMMU support List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Transfer-Encoding: 7bit Content-Type: text/plain; charset="us-ascii"; Format="flowed" Errors-To: iommu-bounces@lists.linux-foundation.org Sender: "iommu" Hi Kevin, Thanks a lot for reviewing. On 2020/5/7 14:38, Tian, Kevin wrote: >> From: Lu Baolu >> Sent: Thursday, May 7, 2020 8:55 AM >> >> When a PASID is stopped or terminated, there can be pending PRQs >> (requests that haven't received responses) in the software and >> remapping hardware. The pending page requests must be drained >> so that the pasid could be reused. The chapter 7.10 in the VT-d >> specification specifies the software steps to drain pending page >> requests and responses. >> >> This includes two parts: >> - PATCH 1/4 ~ 2/4: refactor the qi_submit_sync() to support multiple >> descriptors per submission which will be used in the following >> patch. >> - PATCH 3/4 ~ 4/4: add page request drain support after a pasid entry >> is torn down. >> > I think you should mention that this series depends on Jacob's nested > SVA series. > Yes. It's based on Jacob's vSVA series since guest unbind also requires prq draining. Best regards, baolu _______________________________________________ iommu mailing list iommu@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/iommu