On Sun, Apr 15, 2018 at 03:08:34PM +0100, Russell King - ARM Linux wrote:
> On Wed, Apr 11, 2018 at 07:11:39AM -0700, Tony Lindgren wrote:
> > We already have code in the kernel (and in the bootrom) to "park" a
> > cpu after starting. But using it without resetting the cpu would require
> > 1-1 memory mapping or modifying the code. That is if we wanted to use
> > the same code also for parking the cpus for kexec without resetting
> > them.
>
> In which case, how about using:
>
> while (1) {
> cpu_relax();
> wfe();
> }
>
> instead - that appears to also have the desired effect, allowing kdump
> to work on the SDP4430.
... but results in compile failures on non-ARMv7 targets.
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