RE: [Xen-devel] [PATCH 0/4] HVM Virtual S3

["Yu, Ke" <ke.yu@xxxxxxxxx>]

James Harper wrote:
>> 
>> [PATCH 0/4] HVM Virtual S3
>> 
>> These set of patches are our prototype for HVM virtual
>> ACPI S3 support:
>>  - patch 1/4: Xen interface for HVM S3
>>  - patch 2/4: QEMU interface for HVM S3
>>  - patch 3/4: rombios interface for HVM S3
>>  - patch 4/4: xend interface for HVM S3
>> 
> 
> How does this interact with the PV drivers? Linux, but also how
> should I interact with it in the GPL PV drivers for Windows?

By design, PV drivers should have suspend/resume routine, and it will be
called by guest OS S3 sleep/resume logic. We have test the linux pv
driver, it works fine. Due to current windows virtual S3 resume issue,
we have no chance to test your windows PV driver. But by desing, as long
as PV drvier has right suspeend/resume routine, it should work just
fine.

> 
>> However, Windows guest can not suspend, because the windows
>> driver for QEMU VGA and monitor has no power management support, and
>> windows refuse to enter S3 sleep state.
> 
> I have successfully suspended Windows before using the GPL PV drivers,
> but I haven't gotten resume working yet...
> 
> James

Can you elaborate how you manage to suspend guest windows? We are very
interested in this. In our environment, windows XP refuse to suspend due
to QEMU VGA

Best Regards
Ke



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