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memslot_perf_test uses ucalls for synchronization between guest and host. Ucalls API is architecture independent: tests do not need to know details like what kind of exit they generate on a specific arch. More specifically, there is no need to check whether an exit is KVM_EXIT_IO in x86 for the host to know that the exit is ucall related, as get_ucall() already makes that check. Change memslot_perf_test to not require specifying what exit does a ucall generate. Also add a missing ucall_init. Signed-off-by: Ricardo Koller <ricarkol@google.com> Reviewed-by: Andrew Jones <drjones@redhat.com> Reviewed-by: Oliver Upton <oupton@google.com> Signed-off-by: Marc Zyngier <maz@kernel.org> Link: https://lore.kernel.org/r/20210907180957.609966-2-ricarkol@google.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.