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096dcfb9cd
Moving from using an address filter to trace the default "all addresses"
range to no filtering to acheive the same result, has caused the perf
filtering of kernel/user address spaces from not working unless an
explicit address filter was used.
This is due to the original code using a side-effect of the address
filtering rather than setting the global TRCVICTLR exception level
filtering.
The use of the mode sysfs file is also similarly affected.
A helper function is added to fix both instances.
Fixes: ae2041510d5d ("coresight: etmv4: Update default filter and initialisation")
Reported-by: Leo Yan <leo.yan@linaro.org>
Tested-by: Leo Yan <leo.yan@linaro.org>
Reviewed-by: Leo Yan <leo.yan@linaro.org>
Signed-off-by: Mike Leach <mike.leach@linaro.org>
Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Link: https://lore.kernel.org/r/20200916191737.4001561-8-mathieu.poirier@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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.