Hello Clemens Reibetanz,
I am not aware of a way to clear line fill buffers. But you could use cache management instructions, such as dcbf and icbi to flush data out.
The DLFB/ILFB are located in LSU, why do you need to control or know the status of them?
The replacement policy of the line fill buffer is not documented.
Have a great day,
Lunmin
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