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9d792ef17f
Protected virtualization guests have to use shared pages for airq
notifier bit vectors and summary bytes or bits, thus these need to be
allocated as DMA coherent memory. Commit b50623e5db ("s390/airq: use
DMA memory for adapter interrupts") took care of the notifier bit
vectors, but omitted to take care of the summary bytes/bits.
In practice this omission is not a big deal, because the summary ain't
necessarily allocated here, but can be supplied by the driver. Currently
all the I/O we have for SE guests is virtio-ccw, and virtio-ccw uses a
self-allocated array of summary indicators.
Let us cover all our bases nevertheless!
Signed-off-by: Halil Pasic <pasic@linux.ibm.com>
Reviewed-by: Harald Freudenberger <freude@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
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.