linux-kernel - [PATCH v2 0/4] iommu: Fix the longstanding probe issues

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Message-Id: <cover.1740753261.git.robin.murphy@arm.com>
Date: Fri, 28 Feb 2025 15:46:29 +0000
From: Robin Murphy <robin.murphy@....com>
To: Lorenzo Pieralisi <lpieralisi@...nel.org>,
	Hanjun Guo <guohanjun@...wei.com>,
	Sudeep Holla <sudeep.holla@....com>,
	"Rafael J. Wysocki" <rafael@...nel.org>,
	Len Brown <lenb@...nel.org>,
	Russell King <linux@...linux.org.uk>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Danilo Krummrich <dakr@...nel.org>,
	Stuart Yoder <stuyoder@...il.com>,
	Laurentiu Tudor <laurentiu.tudor@....com>,
	Nipun Gupta <nipun.gupta@....com>,
	Nikhil Agarwal <nikhil.agarwal@....com>,
	Joerg Roedel <joro@...tes.org>,
	Will Deacon <will@...nel.org>,
	Rob Herring <robh@...nel.org>,
	Saravana Kannan <saravanak@...gle.com>,
	Bjorn Helgaas <bhelgaas@...gle.com>
Cc: linux-acpi@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org,
	linux-kernel@...r.kernel.org,
	iommu@...ts.linux.dev,
	devicetree@...r.kernel.org,
	linux-pci@...r.kernel.org,
	Charan Teja Kalla <quic_charante@...cinc.com>
Subject: [PATCH v2 0/4] iommu: Fix the longstanding probe issues

v1: https://lore.kernel.org/linux-iommu/cover.1739486121.git.robin.murphy@arm.com/

Hi all,

This spin irons out a couple of issues which v1 had. Firstly there
should now be no change in behaviour for the weird of_dma_configure()
calls, other than possibly getting the warning if they deserve it.
Secondly I think there was still a possibility for probe to run via
the replay path while its "real" probe was waiting to reacquire the
lock; this is now solved by making dev->iommu a reliable indicator of
the probe lifecycle, with a couple more prep patches.

Thanks,
Robin.


Robin Murphy (4):
  iommu: Handle race with default domain setup
  iommu: Resolve ops in iommu_init_device()
  iommu: Keep dev->iommu state consistent
  iommu: Get DT/ACPI parsing into the proper probe path

 drivers/acpi/arm64/dma.c        |  5 +++
 drivers/acpi/scan.c             |  7 -----
 drivers/amba/bus.c              |  3 +-
 drivers/base/platform.c         |  3 +-
 drivers/bus/fsl-mc/fsl-mc-bus.c |  3 +-
 drivers/cdx/cdx.c               |  3 +-
 drivers/iommu/iommu-priv.h      |  2 ++
 drivers/iommu/iommu.c           | 55 ++++++++++++++++++++++++---------
 drivers/iommu/of_iommu.c        | 13 ++++++--
 drivers/of/device.c             |  7 ++++-
 drivers/pci/pci-driver.c        |  3 +-
 11 files changed, 74 insertions(+), 30 deletions(-)

-- 
2.39.2.101.g768bb238c484.dirty