Re: [Qemu-devel] [PATCH 13/27] acpi: memory hotplug ACPI hardware implementation

[Paolo Bonzini]

Il 25/11/2013 08:27, Markus Armbruster ha scritto:
> "Michael S. Tsirkin" <address@hidden> writes:
> 
> [...]
>> Here this made me think of the following question:
>> should not memory available on boot be listed in CMOS?
>> Let's assume new BIOS gets interrupt telling it there's new memory.
>> It clears the interrupt and then system is reset.
>>
>> Will system after reset detect the new hotplugged memory?

Can it just scan all slots from MHPD._INI?

For example on reset all slots could be disabled by the
ACPIHotpluggableDimmBus (even coldplugged ones), and scanned + enabled
by ASL.

>> How?
> 
> Do physical systems with hot-pluggable memory exist?  How do they
> behave?

I guess they assume BIOS is updated in lockstep with the introduction of
the feature.

Paolo