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6c4927a4b7
Handle "guest stopped" requests once per guest time update in preparation of restoring KVM's historical behavior of setting PVCLOCK_GUEST_STOPPED for kvmclock and only kvmclock. For now, simply move the code to minimize the probability of an unintentional change in functionally. Note, in practice, all clocks are guaranteed to see the request (or not) even though each PV clock processes the request individual, as KVM holds vcpu->mutex (blocks KVM_KVMCLOCK_CTRL) and it should be impossible for KVM's suspend notifier to run while KVM is handling requests. And because the helper updates the reference flags, all subsequent PV clock updates will pick up PVCLOCK_GUEST_STOPPED. Note #2, once PVCLOCK_GUEST_STOPPED is restricted to kvmclock, the horrific #ifdef will go away. Cc: Paul Durrant <pdurrant@amazon.com> Cc: David Woodhouse <dwmw@amazon.co.uk> Reviewed-by: Paul Durrant <paul@xen.org> Link: https://lore.kernel.org/r/20250201013827.680235-5-seanjc@google.com Signed-off-by: Sean Christopherson <seanjc@google.com> |
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| README | ||
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.