Re: [Xen-devel] [PATCH v3] [RFC] arm: use PSCI if available

[Arnd Bergmann <arnd@xxxxxxxx>]

On Wednesday 27 March 2013, Rob Herring wrote:
> No, I was thinking in the case of Xen and mach-virt, you would not set
> mdesc->smp. So you would have something like this:
> 
> if (mdesc->smp)
>         smp_set_ops(mdesc->smp);
> else
>         smp_set_ops(&psci_smp_ops);

The case that Stefano is interested in if obviously other platforms
that can either run as Dom0 under Xen with psci_smp_ops or natively
with their own smp_ops. A similar case would be a platform that
may implement psci using smc when run in secure mode but provide
its own smp_ops when run natively.

In both cases, it would be simpler to use psci if available but
fall back to mdesc->smp otherwise.

        Arnd

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