intel_th: Updates for v5.3

These are:
  * Support for software trace sinks / buffer drivers
  * Various reworks in buffer management code
intel_th: msu: Preserve pre-existing buffer configuration

The MSU configuration registers may contain buffer address/size set by
the BIOS or an external hardware debugger, which may want to take over
tracing from the driver when the driver is not actively tracing.

Preserve these settings when not actively tracing.

Signed-off-by: Alexander Shishkin <>
Reviewed-by: Andy Shevchenko <>
1 file changed