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At the moment we update the chain bitmap on type setting. This does not take into account the enable state of the odd register. Let's make sure a counter is never considered as chained if the high counter is disabled. We recompute the chain state on enable/disable and type changes. Also let create_perf_event() use the chain bitmap and not use kvm_pmu_idx_has_chain_evtype(). Suggested-by: Marc Zyngier <maz@kernel.org> Signed-off-by: Eric Auger <eric.auger@redhat.com> Signed-off-by: Marc Zyngier <maz@kernel.org> Link: https://lore.kernel.org/r/20200124142535.29386-3-eric.auger@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.