Re: [PATCH] sparc64: shut down to OBP correctly

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From: Larry Bassel <larry.bassel@xxxxxxxxxx>
Date: Wed, 21 Dec 2016 09:12:13 -0800

> Orabug: 24789774
> 
> The command "shutdown -h -H now" should shut down the system to
> OBP, however the machine was incorrectly being powered off instead
> (on both LDOM and bare metal).
> 
> The "exit" command to the OBP must be run and then a hard
> loop to prevent return to the kernel.
> 
> Signed-off-by: Larry Bassel <larry.bassel@xxxxxxxxxx>

On LDOM, once you boot past the early stages of the kernel, OBP is
considered volatile and thus unusable.

That's why I did a direct LDOM shutdown here.
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