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From: | Li Guang |
Subject: | Re: [Qemu-devel] [PATCH 16/27] acpi: ich9: allow guest to clear SCI rised by GPE |
Date: | Fri, 22 Nov 2013 09:03:00 +0800 |
User-agent: | Mozilla/5.0 (X11; U; Linux i686 (x86_64); en-US; rv:1.9.1.16) Gecko/20120421 Iceape/2.0.11 |
Igor Mammedov wrote:
On Thu, 21 Nov 2013 16:32:27 +0800 Li Guang<address@hidden> 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<address@hidden>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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