Re: [Xen-devel] [Qemu-devel] [PATCH v3 2/6] suspend: switch acpi s3 to new infrastructure.

[Paolo Bonzini <pbonzini@xxxxxxxxxx>]

On 02/09/2012 01:31 PM, Gleb Natapov wrote:
> Real HW may have other ways to notify BIOS that system was S3 suspended
> (special chipset register for instance).  I think we can write DSDT magic
> to write RTC for us, but I prefer to do it from inside QEMU.
Heh, I would prefer DSDT magic, but I wouldn't want to write it. ;)

> >  RTC memory is nvram, what happens if I remove the mains plug while
> >  the system is in S3?
>
> RTC is battery backed, but what do you expect will happen to main memory
> where all your data resides during S3 in this case anyway?
Ah, I confused the ACPI resume vector with the BIOS vector at 0040:0067. 
 No ACPI tables -> no resume vector, and S3 resume will fail.
Paolo

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