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 A27E2C2BA2B for ; Wed, 15 Apr 2020 05:29:09 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 7BAD92076A for ; Wed, 15 Apr 2020 05:29:09 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2407900AbgDOF3F (ORCPT ); Wed, 15 Apr 2020 01:29:05 -0400 Received: from mga18.intel.com ([134.134.136.126]:30107 "EHLO mga18.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2389364AbgDOF3B (ORCPT ); Wed, 15 Apr 2020 01:29:01 -0400 IronPort-SDR: cACbbizbj4GSYsniv1iDto6uUkJIRri6Bpo4XM3FgVj5I5vHAFennK8L8eCfyHkapV8dH7QaSD nvOFQxxvE4xw== X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga004.fm.intel.com ([10.253.24.48]) by orsmga106.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 14 Apr 2020 22:29:00 -0700 IronPort-SDR: 7MxBb7rl7r0a399Q743Ii+47fUxTTEONxEMePjuwNCoPfGk8H/nKEWgA45CJgDJLFvSzGt7EtG 0F8+uQNETuWw== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.72,385,1580803200"; d="scan'208";a="277504145" Received: from allen-box.sh.intel.com ([10.239.159.139]) by fmsmga004.fm.intel.com with ESMTP; 14 Apr 2020 22:28:58 -0700 From: Lu Baolu To: Joerg Roedel Cc: ashok.raj@intel.com, jacob.jun.pan@linux.intel.com, Liu Yi L , kevin.tian@intel.com, iommu@lists.linux-foundation.org, linux-kernel@vger.kernel.org, Lu Baolu Subject: [PATCH v2 0/7] iommu/vt-d: Add page request draining support Date: Wed, 15 Apr 2020 13:25:35 +0800 Message-Id: <20200415052542.30421-1-baolu.lu@linux.intel.com> X-Mailer: git-send-email 2.17.1 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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 register level interface for page request draining is defined in 7.11 of the VT-d spec. This series adds the support for page requests draining. This includes two parts: - PATCH 1/7 ~ 3/7: refactor the qi_submit_sync() to support multiple descriptors per submission which will be used by PATCH 6/7. - PATCH 4/7 ~ 7/7: add page request drain support after a pasid entry is torn down due to an unbind operation. Please help to review. Best regards, baolu Change log: v1->v2: - Fix race between multiple prq handling threads Lu Baolu (7): iommu/vt-d: Refactor parameters for qi_submit_sync() iommu/vt-d: Multiple descriptors per qi_submit_sync() iommu/vt-d: debugfs: Add support to show inv queue internals iommu/vt-d: Refactor prq_event_thread() iommu/vt-d: Save prq descriptors in an internal list 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-pasid.c | 4 +- drivers/iommu/intel-svm.c | 383 ++++++++++++++++++---------- drivers/iommu/intel_irq_remapping.c | 2 +- include/linux/intel-iommu.h | 12 +- 6 files changed, 369 insertions(+), 157 deletions(-) -- 2.17.1