[edk2-devel] The status of ACPI S4 support in OVMF

[Gary Lin via groups.io]

On Mon, Apr 19, 2021 at 02:32:25PM +0200, Laszlo Ersek wrote:
> On 04/19/21 11:54, Gary Lin via groups.io wrote:
> > Hi,
> >
> > Years ago, the bug(*) for PEI variable driver was filed against OVMF
> > and it used to be one reason to block S4 support in OVMF. The bug is
> > fixed now, and there are several MemTypeInfo fixes merged into OVMF.
> >
> > I'm curious about the current status of S4 support in OVMF. Is it
> > still considered as unsupported due to some other bugs?
> >
> > Thanks,
> >
> > Gary Lin
> >
> > (*) https://bugzilla.tianocore.org/show_bug.cgi?id=386
> 
> I recall the last related discussion from February:
> 
> * [edk2-devel] [PATCH 0/2] Improve hibernation safety
> 
>   https://edk2.groups.io/g/devel/message/71790
>   https://listman.redhat.com/archives/edk2-devel-archive/2021-February/msg00842.html
>   http://mid.mail-archive.com/20210218200953.20943-1-graf@amazon.com
> 
> No patches needed to be merged (Alex was missing some commits that had
> been upstreamed by then).
> 
> My understanding is that S4 should work at this point, although I've
> never really tested it myself.
> 
Thanks for the information. I was reviewing the libvirt descriptor for
ovmf and wondering if it's ready for the "acpi-s4" tag. Maybe it's a
good to give it a try.

Thanks,

Gary Lin



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