From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751855AbaBSGGy (ORCPT ); Wed, 19 Feb 2014 01:06:54 -0500 Received: from mga09.intel.com ([134.134.136.24]:46319 "EHLO mga09.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751034AbaBSGGw (ORCPT ); Wed, 19 Feb 2014 01:06:52 -0500 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="4.97,504,1389772800"; d="scan'208";a="485626324" From: Jiang Liu To: Joerg Roedel , David Woodhouse , Yinghai Lu , Bjorn Helgaas , Dan Williams , Vinod Koul , "Rafael J . Wysocki" Cc: Jiang Liu , Ashok Raj , Yijing Wang , Tony Luck , iommu@lists.linux-foundation.org, linux-pci@vger.kernel.org, linux-kernel@vger.kernel.org, dmaengine@vger.kernel.org Subject: [Patch Part2 V2 00/17] Enhance DMAR drivers to handle PCI/memory hotplug events Date: Wed, 19 Feb 2014 14:07:20 +0800 Message-Id: <1392790057-32434-1-git-send-email-jiang.liu@linux.intel.com> X-Mailer: git-send-email 1.7.10.4 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Intel DMA/interrupt remapping drivers scan available PCI/memory devices at startup and cache discovered hardware topologies. They don't update cached information if PCI/memory hotplug event happens at runtime, then the stale information may break DMA/interrupt remapping logic. This patchset first (Patch 1-12) tries to introduces some helper functions and fixes several bugs, then (Patch 13,14) uses a global rwsem and RCU to protect global DMA/interrupt remapping data structures, and finally (Patch 15-17) hook PCI/memory hotplug events to update cached information. It's also a preparation for supporting of DMA/interrupt remapping hotplug. V1->V2: 1) fix more bugs in dealing with identify mapping domain 2) address round 1 review comments Jiang Liu (17): iommu/vt-d: avoid double free of g_iommus on error recovery path iommu/vt-d: avoid caching stale domain_device_info and fix memory leak iommu/vt-d: avoid caching stale domain_device_info when hot-removing PCI device iommu/vt-d: factor out dmar_alloc_dev_scope() for later reuse iommu/vt-d: move private structures and variables into intel-iommu.c iommu/vt-d: simplify function get_domain_for_dev() iommu/vt-d: free resources if failed to create domain for PCIe endpoint iommu/vt-d: reduce duplicated code to handle virtual machine domains iommu/vt-d: fix incorrect iommu_count for si_domain iommu/vt-d: check for NULL pointer when freeing IOMMU data structure iommu/vt-d: fix error in detect ATS capability iommu/vt-d: introduce macro for_each_dev_scope() to walk device scope entries iommu/vt-d: introduce a rwsem to protect global data structures iommu/vt-d: use RCU to protect global resources in interrupt context iommu/vt-d, PCI: update DRHD/RMRR/ATSR device scope caches when PCI hotplug happens iommu/vt-d, PCI: unify the way to process DMAR device scope array iommu/vt-d: update IOMMU state when memory hotplug happens drivers/iommu/dmar.c | 412 +++++++++++++------ drivers/iommu/intel-iommu.c | 750 ++++++++++++++++++----------------- drivers/iommu/intel_irq_remapping.c | 108 +++-- drivers/iommu/iova.c | 64 ++- include/linux/dmar.h | 74 ++-- include/linux/iova.h | 2 + 6 files changed, 848 insertions(+), 562 deletions(-) -- 1.7.10.4