# Re: \[PATCH 1/2\] powerpc/85xx: add hardware automatically enter altivec idle state

- From: Kumar Gala \<hidden\>
- Date: 2013-08-16 11:02:51 
- List: linuxppc-dev
- Page: https://ratatoskr.run/linuxppc-dev/2013/08/9475893
- Thread: https://ratatoskr.run/linuxppc-dev/2013/08/9475885/t.md

```text

On Aug 16, 2013, at 2:23 AM, Dongsheng Wang wrote:

> From: Wang Dongsheng <redacted>
>=20
> Each core's AltiVec unit may be placed into a power savings mode
> by turning off power to the unit. Core hardware will automatically
> power down the AltiVec unit after no AltiVec instructions have
> executed in N cycles. The AltiVec power-control is triggered by =
hardware.
>=20
> Signed-off-by: Wang Dongsheng <redacted>

Why treat this as a idle HW governor vs just some one time setup at boot =
of the time delay?

- k=
```