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There are several reasons in which a VM needs to deactivate APICv e.g. disable APICv via parameter during module loading, or when enable Hyper-V SynIC support. Additional inhibit reasons will be introduced later on when dynamic APICv is supported, Introduce KVM APICv inhibit reason bits along with a new variable, apicv_inhibit_reasons, to help keep track of APICv state for each VM, Initially, the APICV_INHIBIT_REASON_DISABLE bit is used to indicate the case where APICv is disabled during KVM module load. (e.g. insmod kvm_amd avic=0 or insmod kvm_intel enable_apicv=0). Signed-off-by: Suravee Suthikulpanit <suravee.suthikulpanit@amd.com> [Do not use get_enable_apicv; consider irqchip_split in svm.c. - Paolo] Signed-off-by: Paolo Bonzini <pbonzini@redhat.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.