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During VT-d pass-through, the VMD driver occasionally fails to enumerate underlying NVMe devices when repetitive reboots are performed in the guest OS. The issue can be resolved by resetting VMD root ports for proper enumeration and triggering secondary bus reset which will also propagate reset through downstream bridges. Link: https://lore.kernel.org/r/20211116221136.85134-1-nirmal.patel@linux.intel.com Signed-off-by: Nirmal Patel <nirmal.patel@linux.intel.com> Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> Reviewed-by: Jon Derrick <jonathan.derrick@linux.dev>
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.