[PATCH] arm64: Force SPARSEMEM_VMEMMAP as the only memory management model

[Marc Zyngier]

On Tue, 20 Apr 2021 10:35:59 +0100,
Catalin Marinas <catalin.marinas at arm.com> wrote:
> 
> Currently arm64 allows a choice of FLATMEM, SPARSEMEM and
> SPARSEMEM_VMEMMAP. However, only the latter is tested regularly. FLATMEM
> does not seem to boot in certain configurations (guest under KVM with
> Qemu as a VMM). Since the reduction of the SECTION_SIZE_BITS to 27 (4K
> pages) or 29 (64K page), there's little argument against the memory
> wasted by the mem_map array with SPARSEMEM.
> 
> Make SPARSEMEM_VMEMMAP the only available option, non-selectable, and
> remove the corresponding #ifdefs under arch/arm64/.
> 
> Signed-off-by: Catalin Marinas <catalin.marinas at arm.com>
> Cc: Will Deacon <will at kernel.org>

Acked-by: Marc Zyngier <maz at kernel.org>

	M.

-- 
Without deviation from the norm, progress is not possible.