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=-3.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT 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 A9D6CC54E8D for ; Tue, 12 May 2020 00:56:41 +0000 (UTC) Received: from whitealder.osuosl.org (smtp1.osuosl.org [140.211.166.138]) (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 6B8E3206F5 for ; Tue, 12 May 2020 00:56:41 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 6B8E3206F5 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 whitealder.osuosl.org (Postfix) with ESMTP id D86D88838D; Tue, 12 May 2020 00:56:40 +0000 (UTC) X-Virus-Scanned: amavisd-new at osuosl.org Received: from whitealder.osuosl.org ([127.0.0.1]) by localhost (.osuosl.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 1Chs5EwAkI76; Tue, 12 May 2020 00:56:39 +0000 (UTC) Received: from lists.linuxfoundation.org (lf-lists.osuosl.org [140.211.9.56]) by whitealder.osuosl.org (Postfix) with ESMTP id 7BF9787779; Tue, 12 May 2020 00:56:39 +0000 (UTC) Received: from lf-lists.osuosl.org (localhost [127.0.0.1]) by lists.linuxfoundation.org (Postfix) with ESMTP id 5D980C0176; Tue, 12 May 2020 00:56:39 +0000 (UTC) Received: from hemlock.osuosl.org (smtp2.osuosl.org [140.211.166.133]) by lists.linuxfoundation.org (Postfix) with ESMTP id 734EEC016F for ; Tue, 12 May 2020 00:56:37 +0000 (UTC) Received: from localhost (localhost [127.0.0.1]) by hemlock.osuosl.org (Postfix) with ESMTP id 5C5B6887A1 for ; Tue, 12 May 2020 00:56:37 +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 qFadww9h-syM for ; Tue, 12 May 2020 00:56:36 +0000 (UTC) X-Greylist: domain auto-whitelisted by SQLgrey-1.7.6 Received: from mga07.intel.com (mga07.intel.com [134.134.136.100]) by hemlock.osuosl.org (Postfix) with ESMTPS id BBFF3887A5 for ; Tue, 12 May 2020 00:56:36 +0000 (UTC) IronPort-SDR: aGQ+RUij3BISaB48pVNKmi6MwAN6gkQkLG1L2okjiG17TXETRX7oLnAIPV7FRhuqlh7VlZXj82 FozVbnl50a6g== X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga004.fm.intel.com ([10.253.24.48]) by orsmga105.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 11 May 2020 17:56:35 -0700 IronPort-SDR: cvFulzHyc6zjTWxm9v/k/Dr4cBjfdprX5LLtXpTnSCmkLw4FzgeER4Z6Wu9a7KqJtd1/9rezdz 3CmU5/liMPUA== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.73,381,1583222400"; d="scan'208";a="286458375" Received: from allen-box.sh.intel.com ([10.239.159.139]) by fmsmga004.fm.intel.com with ESMTP; 11 May 2020 17:56:33 -0700 From: Lu Baolu To: Joerg Roedel Subject: [PATCH v5 0/5] iommu/vt-d: Add page request draining support Date: Tue, 12 May 2020 08:53:02 +0800 Message-Id: <20200512005307.19860-1-baolu.lu@linux.intel.com> X-Mailer: git-send-email 2.17.1 Cc: kevin.tian@intel.com, ashok.raj@intel.com, 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: , MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: iommu-bounces@lists.linux-foundation.org Sender: "iommu" 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 1/5 ~ 2/5: refactor the qi_submit_sync() to support multiple descriptors per submission which will be used in the following patch. - PATCH 3/5 ~ 5/5: add page request drain support after a pasid entry is torn down. This series is based on Jacob's vSVA support hence the guest pasid could also be drained. https://lkml.org/lkml/2020/4/21/1038 Best regards, baolu Change log: v4->v5: - Only set FPD bit in PASID entry when entry changed from present to non-present; - Check pri_support in drain helper; - Refine the wait/completion usage. v3->v4: - Remove prq drain in mm notifier; - Set PASID FPD bit when pasid is cleared in mm notifier and clear it in unbound(). v2->v3: - Address Kevin's review comments - Squash the first 2 patches together; - The prq thread is serialized, no need to consider reentrance; - Ensure no new-coming prq before drain prq in queue; - Handle page request overflow case. v1->v2: - Fix race between multiple prq handling threads. Lu Baolu (5): iommu/vt-d: Multiple descriptors per qi_submit_sync() iommu/vt-d: debugfs: Add support to show inv queue internals iommu/vt-d: Disable non-recoverable fault processing before unbind iommu/vt-d: Add page request draining support iommu/vt-d: Remove redundant IOTLB flush drivers/iommu/dmar.c | 63 ++++++++------ drivers/iommu/intel-iommu-debugfs.c | 62 ++++++++++++++ drivers/iommu/intel-iommu.c | 4 +- drivers/iommu/intel-pasid.c | 30 +++++-- drivers/iommu/intel-pasid.h | 4 +- drivers/iommu/intel-svm.c | 128 ++++++++++++++++++++++++---- drivers/iommu/intel_irq_remapping.c | 2 +- include/linux/intel-iommu.h | 13 ++- 8 files changed, 253 insertions(+), 53 deletions(-) -- 2.17.1 _______________________________________________ iommu mailing list iommu@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/iommu