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[ Upstream commit966b753cf3] Current implementation for IOMMU x2APIC support makes use of the MMIO access to MSI capability block registers, which requires checking EFR[MsiCapMmioSup]. However, only IVHD type 11h/40h contain the information, and not in the IVHD type 10h IOMMU feature reporting field. Since the BIOS in newer systems, which supports x2APIC, would normally contain IVHD type 11h/40h, remove the IOMMU_FEAT_XTSUP_SHIFT check for IVHD type 10h, and only support x2APIC with IVHD type 11h/40h. Fixes:6692981295('iommu/amd: Add support for X2APIC IOMMU interrupts') Signed-off-by: Suravee Suthikulpanit <suravee.suthikulpanit@amd.com> Signed-off-by: Joerg Roedel <jroedel@suse.de> Signed-off-by: Sasha Levin <sashal@kernel.org>
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.