Re: [PATCH] hw/i386: Add unaccepted memory configuration

[Michael S. Tsirkin]

On Tue, Jun 21, 2022 at 07:37:02AM +0200, Gerd Hoffman wrote:
> On Mon, Jun 20, 2022 at 10:33:00PM +0000, Dionna Glaze wrote:
> > For SEV-SNP, an OS is "SEV-SNP capable" without supporting this UEFI
> > v2.9 memory type. In order for OVMF to be able to avoid pre-validating
> > potentially hundreds of gibibytes of data before booting, it needs to
> > know if the guest OS can support its use of the new type of memory in
> > the memory map.
> 
> I think this should be wired up via sev-guest object (see
> SevGuestProperties in qapi/qom.json and target/i386/sev.c),
> i.e.
> 
> qemu -object sev-guest,accept-all-memory=true,$args
> 
> (and likewise for -object tdx-guest once merged).
> 
> take care,
>   Gerd

Right. As written the patch would allow the flag without SEV-SNP too -
but does it make any sense outside SEV-SNP? It's better not to allow
flag combinations that make no sense since they tend to
become part of ABI that we then need to support.

-- 
MST