On Mon, 12 Jan 2026 16:59:08 +0000
Ben Horgan [off-list ref] wrote:

From: James Morse <james.morse@arm.com>

MPAM supports a minimum and maximum control for memory bandwidth. The
purpose of the minimum control is to give priority to tasks that are below
their minimum value. Resctrl only provides one value for the bandwidth
configuration, which is used for the maximum.

The minimum control is always programmed to zero on hardware that supports
it.

Generate a minimum bandwidth value that is 5% lower than the value provided
by resctrl. This means tasks that are not receiving their target bandwidth
can be prioritised by the hardware.

For component reset reuse the same calculation so that the default is a
value resctrl can set.

CC: Zeng Heng <redacted>
Signed-off-by: James Morse <james.morse@arm.com>
Signed-off-by: Ben Horgan <ben.horgan@arm.com>

I'm interested to see how this plays out as a default choice
vs what people elect to run.  Seems harmless to start with this.

Reviewed-by: Jonathan Cameron <jonathan.cameron@huawei.com>