Re: [Qemu-ppc] [Qemu-devel] [PATCH 4/4] spapr: Add support for time base offset migration

[Benjamin Herrenschmidt]

On Mon, 2014-04-14 at 08:32 +0200, Alexander Graf wrote:
> So for chips that might be configurable, configuration has to happen via 
> some SPR, right? Wouldn't it make sense to transfer that configuration 
> SPR on these and thus the configuration as well?

Well, on a real 970 I can always go poke the clock chip via i2c but
I doubt we'll ever emulate that ;-)

> Really, the main problem I see with adding the tb frequency into the 
> migration stream is that we'd change the migration format. Worst case it 
> would be a few useless bytes on migration - not a big deal. But I don't 
> think we support any case where it would actually be required - it'd 
> only be a safety net.

Indeed, no biggie either way then.

Cheers,
Ben.