Re: [PATCH v7 00/10] ppc64: Restrict memory allocations for kernel and initrd

[Stefan Berger]

On 11/27/23 09:46, Stefan Berger wrote:
> On 11/27/23 07:10, John Paul Adrian Glaubitz wrote:
> > Hello Stefan!
> >
> > On Mon, 2023-11-27 at 06:58 -0500, Stefan Berger wrote:
> > > This series of patches converts the PowerPC ieee1275 memory allocator
> > > for kernel and initrd to use the (PowerPC) regions_claim memory 
> > > allocator
> > > that takes into account memory regions that are not allowed to be used,
> > > such as the gap between 640MB and 768MB as well as memory regions beyond
> > > an address in case an fadump is present. Otherwise those two could be
> > > loaded into restricted memory regions and either cause a crash or
> > > corruption of the fadump.
> >
> > Is this regions_claims memory allocator available on all PowerPC targets
> > or only on newer POWER machines?
>
> It's not available for PowerMACs but for PowerVM and KVM on Power 
> systems as well as i386/ieee1275.

Actually, let me clarify. The regions_claims memory allocator is 
'available' to all of them but only being used by PowerVM and KVM on 
Power. The 2nd paragraph states:

> I adjusted the kernel and initrd load in loader/powerpc/ieee1275 to use
> the new memory allocator only on PowerVM and PowerKVM since this code is
> shared with other platforms, such as old PowerMACs and i386.



>     Stefan
>
> > Thanks,
> > Adrian
>
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