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Introduces two new CPU model facilities to support AP virtualization for KVM guests: 1. AP Query Configuration Information (QCI) facility is installed. This is indicated by setting facilities bit 12 for the guest. The kernel will not enable this facility for the guest if it is not set on the host. If this facility is not set for the KVM guest, then only APQNs with an APQI less than 16 will be used by a Linux guest regardless of the matrix configuration for the virtual machine. This is a limitation of the Linux AP bus. 2. AP Facilities Test facility (APFT) is installed. This is indicated by setting facilities bit 15 for the guest. The kernel will not enable this facility for the guest if it is not set on the host. If this facility is not set for the KVM guest, then no AP devices will be available to the guest regardless of the guest's matrix configuration for the virtual machine. This is a limitation of the Linux AP bus. Signed-off-by: Tony Krowiak <akrowiak@linux.ibm.com> Reviewed-by: Christian Borntraeger <borntraeger@de.ibm.com> Reviewed-by: Halil Pasic <pasic@linux.ibm.com> Reviewed-by: David Hildenbrand <david@redhat.com> Tested-by: Michael Mueller <mimu@linux.ibm.com> Tested-by: Farhan Ali <alifm@linux.ibm.com> Acked-by: Cornelia Huck <cohuck@redhat.com> Message-Id: <20180925231641.4954-26-akrowiak@linux.vnet.ibm.com> Signed-off-by: Christian Borntraeger <borntraeger@de.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.
See Documentation/00-INDEX for a list of what is contained in each file.
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.