Re: [Qemu-devel] [PATCH 4/3] wakeup: only reset the CPU

[David Woodhouse]

On Tue, 2013-03-05 at 17:03 +0100, Paolo Bonzini wrote:
> Resuming from suspend-to-RAM should not reset all devices.  Only the
> CPU should get a reset signal.

Hm... on reflection, I don't actually know if this is true.

Perhaps we *should* reset all devices. After all, in a real machine
they'll all have been turned off and the RAM will have been in
self-refresh. Surely they have to be reset?

So maybe we should *let* the i440FX PAM registers get reset to point to
ROM. And fix the firmware to *cope* with that, check to see if the
shadow RAM already holds an image of a started-up firmware with the
correct checksum, and jump back to it.

That is: perhaps it's a *SeaBIOS* bug that suspend/resume doesn't work
if the PAM configuration is reset?

-- 
dwmw2

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