Hi Maxime,

On Thu, Mar 19, 2015 at 2:18 AM, maxime.ripard
[off-list ref] wrote:

Hi Kevin,

On Thu, Mar 19, 2015 at 12:05:06PM +0800, kevin.z.m.zh at gmail.com wrote:

quoted

quoted

quoted

One question I couldn't find any answer to is that does the SMP bit is
set in secondary_startup?

I couldn't find where it was set, but it still looks like the right
thing to do, so I would expect the code to do that.

I don't see it either. The sun8i code is just the sun6i code with the
power clamps removed. And sun6i secondary_startup was removed some time
ago in commit 1146b600044d ("ARM: sunxi: fix build for THUMB2_KERNEL").

ChenYu

The SMP bit should be set in the function of "__v7_ca7mp_setup", which is located
in the file:
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/tree/arch/arm/mm/proc-v7.S?id=refs/tags/v4.0-rc4
I'm not sure if this is your discussion.

It is, but I wasn't seeing it called anywhere in the secondary_startup
code path.

I was expecting a direct call, but it looks like it's a dynamic call,
with a function-pointer like call, that is indeed run both in the
kernel entry point and the secondary_startup.

https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/tree/arch/arm/kernel/head.S?id=refs/tags/v4.0-rc4#n389

Are we waiting for Marc's input on this?

ChenYu