Re: [PATCH 1/2] numa: Set default distance map if needed

[Andrew Jones]

On Tue, Oct 12, 2021 at 03:53:21PM +0200, Igor Mammedov wrote:
...
> > > 
> > > Instead of putting workaround in QEMU and then making them generic,
> > > I'd prefer to:
> > >  1. make QEMU to be able generate DT with memory-less nodes  
> > 
> > How? DT syntax doesn't allow this, because each node needs a unique
> > name which is derived from its base address, which an empty numa
> you are talking about memory@foo nodes, aren't you?

yes, memory@<address> nodes

...
> > 
> > > or use ACPI tables which can
> > >     describe memory-less NUMA nodes if fixing how DT is
> > >     parsed unfeasible.  
> > 
> > We use ACPI already for our guests, but we also generate a DT (which
> > edk2 consumes). We can't generate a valid DT when empty numa nodes
> does edk2 actually uses numa info from QEMU?
>

edk2 doesn't use it, but I'd prefer we generate a DT which describes
the user's input and what the ACPI tables describe. Maybe someday it
won't be possible, but so far we've managed.

Thanks,
drew