intel_th: msu: Add current window tracking

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Now that we have a way to switch between MSC buffer windows, add code to
track the current window. The hardware register NWSA that contains the
address of the next window is unfortunately not always usable, and since
the driver has full control of the window switching, there is no reason
not to keep this on the software side.

Signed-off-by: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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Alexander Shishkin 2019-05-03 11:44:51 +03:00 • committed by Greg Kroah-Hartman

parent 6cac7866c2

commit aad14ad3cf

1 changed files with 49 additions and 30 deletions

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drivers/hwtracing/intel_th/msu.c

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