linux-kernel - [PATCH v2 0/2] iommu/vt-d: Introduce rbtree for probed devices

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Message-Id: <20240220065939.121116-1-baolu.lu@linux.intel.com>
Date: Tue, 20 Feb 2024 14:59:37 +0800
From: Lu Baolu <baolu.lu@...ux.intel.com>
To: Joerg Roedel <joro@...tes.org>,
	Will Deacon <will@...nel.org>,
	Robin Murphy <robin.murphy@....com>,
	Jason Gunthorpe <jgg@...pe.ca>,
	Kevin Tian <kevin.tian@...el.com>
Cc: Huang Jiaqing <jiaqing.huang@...el.com>,
	Ethan Zhao <haifeng.zhao@...ux.intel.com>,
	iommu@...ts.linux.dev,
	linux-kernel@...r.kernel.org,
	Lu Baolu <baolu.lu@...ux.intel.com>
Subject: [PATCH v2 0/2] iommu/vt-d: Introduce rbtree for probed devices

This is a follow-up to the discussion thread here:

https://lore.kernel.org/linux-iommu/20240201193427.GQ50608@ziepe.ca/

This proposes a per-IOMMU red-black tree for iommu probed devices. It
benefits fault handling paths, where the VT-d hardware reports the
Source ID of the related device, and software needs to retrieve the
corresponding device pointer based on this ID.

This is also available at github:

https://github.com/LuBaolu/intel-iommu/commits/rbtree-for-device-info-v2

Change log:

v2:
 - Drop get/put_device() in device_rbtree_find();
 - Add a mutex to synchronize iopf report and device release paths.

v1: https://lore.kernel.org/linux-iommu/20240215072249.4465-1-baolu.lu@linux.intel.com/

Lu Baolu (2):
  iommu/vt-d: Use rbtree to track iommu probed devices
  iommu/vt-d: Use device rbtree in iopf reporting path

 drivers/iommu/intel/iommu.h | 10 ++++
 drivers/iommu/intel/dmar.c  |  4 +-
 drivers/iommu/intel/iommu.c | 91 ++++++++++++++++++++++++++++++++++++-
 drivers/iommu/intel/svm.c   | 17 +++----
 4 files changed, 111 insertions(+), 11 deletions(-)

-- 
2.34.1