4d2af08ed0
A couple of fixes for the AMD IOMMU driver have piled up:
* Some fixes for the reworked IO page-table which caused memory
leaks or did not allow to downgrade mappings under some
conditions.
* Locking fixes to fix a couple of possible races around
accessing 'struct protection_domain'. The races got introduced
when the dma-ops path became lock-less in the fast-path.
-----BEGIN PGP SIGNATURE-----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=xajX
-----END PGP SIGNATURE-----
Merge tag 'iommu-fixes-5.4-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu
Pull iommu fixes from Joerg Roedel:
"A couple of fixes for the AMD IOMMU driver have piled up:
- Some fixes for the reworked IO page-table which caused memory leaks
or did not allow to downgrade mappings under some conditions.
- Locking fixes to fix a couple of possible races around accessing
'struct protection_domain'. The races got introduced when the
dma-ops path became lock-less in the fast-path"
* tag 'iommu-fixes-5.4-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu:
iommu/amd: Lock code paths traversing protection_domain->dev_list
iommu/amd: Lock dev_data in attach/detach code paths
iommu/amd: Check for busy devices earlier in attach_device()
iommu/amd: Take domain->lock for complete attach/detach path
iommu/amd: Remove amd_iommu_devtable_lock
iommu/amd: Remove domain->updated
iommu/amd: Wait for completion of IOTLB flush in attach_device
iommu/amd: Unmap all L7 PTEs when downgrading page-sizes
iommu/amd: Introduce first_pte_l7() helper
iommu/amd: Fix downgrading default page-sizes in alloc_pte()
iommu/amd: Fix pages leak in free_pagetable()
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.