Re: [PATCH v6 1/5] powerpc/85xx: implement hardware timebase sync

On Wed, Jun 27, 2012 at 08:10:34AM +1000, Benjamin Herrenschmidt wrote:

On Tue, 2012-06-26 at 18:25 +0800, Zhao Chenhui wrote:

quoted

Do hardware timebase sync. Firstly, stop all timebases, and transfer
the timebase value of the boot core to the other core. Finally,
start all timebases.

Only apply to dual-core chips, such as MPC8572, P2020, etc.

Signed-off-by: Zhao Chenhui <redacted>
Signed-off-by: Li Yang <redacted>
---
Changes for v6:
 * added 85xx_TB_SYNC
 * added isync() after set_tb()
 * removed extra entries from mpc85xx_smp_guts_ids

What's that CONFIG option for ?

Cheers,
Ben.

This option is to guard the timebase sync routines. It is selected
when KEXEC or HOTPLUG_CPU is enabled on Freescale Book-E platforms.

-Chenhui