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A couple of Intel VT-d fixes:
- Make Intel SVM code 64bit only. The code uses pgd_t* and the
IOMMU only supports long-mode page-table formats, so its
broken on 32bit anyway.
- Make sure GFX quirks in for Intel VT-d are not applied to
untrusted devices. Those devices might gain full memory access
otherwise.
- Identity mapping setup fix.
- Fix ACS enabling when Intel IOMMU is off and untrusted devices
are detected.
- Two smaller fixes for coherency and IO page-table setup
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Merge tag 'iommu-fixes-v5.8-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu
Pull iommu fixes from Joerg Roedel:
"A couple of Intel VT-d fixes:
- Make Intel SVM code 64bit only. The code uses pgd_t* and the IOMMU
only supports long-mode page-table formats, so its broken on 32bit
anyway.
- Make sure GFX quirks in for Intel VT-d are not applied to untrusted
devices. Those devices might gain full memory access otherwise.
- Identity mapping setup fix.
- Fix ACS enabling when Intel IOMMU is off and untrusted devices are
detected.
- Two smaller fixes for coherency and IO page-table setup"
* tag 'iommu-fixes-v5.8-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu:
iommu/vt-d: Fix misuse of iommu_domain_identity_map()
iommu/vt-d: Update scalable mode paging structure coherency
iommu/vt-d: Enable PCI ACS for platform opt in hint
iommu/vt-d: Don't apply gfx quirks to untrusted devices
iommu/vt-d: Set U/S bit in first level page table by default
iommu/vt-d: Make Intel SVM code 64-bit only
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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
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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.