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c0461f2063
Introduce kvm_follow_pfn() to eventually supplant the various "gfn_to_pfn" APIs, albeit by adding more wrappers. The primary motivation of the new helper is to pass a structure instead of an ever changing set of parameters, e.g. so that tweaking the behavior, inputs, and/or outputs of the "to pfn" helpers doesn't require churning half of KVM. In the more distant future, the APIs exposed to arch code could also follow suit, e.g. by adding something akin to x86's "struct kvm_page_fault" when faulting in guest memory. But for now, the goal is purely to clean up KVM's "internal" MMU code. As part of the conversion, replace the write_fault, interruptible, and no-wait boolean flags with FOLL_WRITE, FOLL_INTERRUPTIBLE, and FOLL_NOWAIT respectively. Collecting the various FOLL_* flags into a single field will again ease the pain of passing new flags. Tested-by: Alex Bennée <alex.bennee@linaro.org> Signed-off-by: David Stevens <stevensd@chromium.org> Co-developed-by: Sean Christopherson <seanjc@google.com> Signed-off-by: Sean Christopherson <seanjc@google.com> Tested-by: Dmitry Osipenko <dmitry.osipenko@collabora.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Message-ID: <20241010182427.1434605-20-seanjc@google.com> |
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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 reStructuredText 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.