Igor Mammedov wrote:
On Thu, 21 Nov 2013 16:32:27 +0800
Li Guang<lig.f...@cn.fujitsu.com>  wrote:

Michael S. Tsirkin wrote:
On Thu, Nov 21, 2013 at 04:18:45PM +0800, Li Guang wrote:

Hu Tao wrote:

On Thu, Nov 21, 2013 at 09:14:18AM +0200, Michael S. Tsirkin wrote:

On Thu, Nov 21, 2013 at 03:38:37AM +0100, Igor Mammedov wrote:

it fixes IRQ storm since guest isn't able to lower SCI IRQ
after it has been handled when it clears GPE event.

Signed-off-by: Igor Mammedov<imamm...@redhat.com>

The storm is only on memory hotplug right?

IIRC, it happens on cpu hotplug, too.




:-), that made remember EC implementation,
with EC, SCI will be safer, I think.

Hmm you are saying let's use EC for memory hotplug?



It can be a bridge between guest and QEMU,
with it, we may don't have to bother ASL writing
and south-bridge hardware related work(or very
little) if we implement EC correctly.

Wouldn't it require guest driver though?
Beauty of ASL/GPE it's that it supported by Windows and Linux
out of box.


it did require guest driver, but as a ACPI standard device,
the driver is natively implemented by ACPI compatible OS.





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