Re: [Xen-devel] [PATCH] hvmloader: add "wakeup from S4 on RTC alarm"bit to ACPI FADT

[Tim Deegan <Tim.Deegan@xxxxxxxxxx>]

Please don't top-post. 

At 16:00 +0000 on 04 Feb (1296835213), Paul Durrant wrote:
> Yes, you can restart the VM yourself if you want to wait around and
> watch the test! Yes, ACPI does have to be set up correctly for the
> test to run at all though.

XenServer has code in the qemu acpi path to actually perform timed wake
from S4 by pulling the RTC state out of the hypervisor.  I thought this
had gone upstream to qemu-xen already; now that we're transitioning to
upstream qemu I'm not sure where it should go.  It will certainly need
tidying for upstream qemu as it's very xen-specific.

Cheers,

Tim.

>   Paul
> 
> > -----Original Message-----
> > From: Paolo Bonzini [mailto:pbonzini@xxxxxxxxxx]
> > Sent: 04 February 2011 15:57
> > To: Paul Durrant
> > Cc: Keir Fraser; xen-devel@xxxxxxxxxxxxxxxxxxx
> > Subject: Re: [Xen-devel] [PATCH] hvmloader: add "wakeup from S4 on
> > RTC alarm"bit to ACPI FADT
> > 
> > On 02/04/2011 04:22 PM, Paul Durrant wrote:
> > > I believe the test *requires* S4 support. Some others require S3
> > support, with similar RTC wake.
> > 
> > It requires S4 support, but that's not a problem.  S4 is just
> > hibernate and works nicely.
> > 
> > For the test, RTC wake is not needed (you can simply restart the
> > machine yourself), but the test fails to run if it is not available.
> > 
> > Paolo
> 
> _______________________________________________
> Xen-devel mailing list
> Xen-devel@xxxxxxxxxxxxxxxxxxx
> http://lists.xensource.com/xen-devel

-- 
Tim Deegan <Tim.Deegan@xxxxxxxxxx>
Principal Software Engineer, Xen Platform Team
Citrix Systems UK Ltd.  (Company #02937203, SL9 0BG)

_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxxxxxxxx
http://lists.xensource.com/xen-devel