[PATCH v3 7/9] riscv: Enable memory hotplugging for RISC-V

[Alexandre Ghiti]

On Tue, May 21, 2024 at 1:49 PM Björn Töpel <bjorn at kernel.org> wrote:
>
> From: Björn Töpel <bjorn at rivosinc.com>
>
> Enable ARCH_ENABLE_MEMORY_HOTPLUG and ARCH_ENABLE_MEMORY_HOTREMOVE for
> RISC-V.
>
> Signed-off-by: Björn Töpel <bjorn at rivosinc.com>
> ---
>  arch/riscv/Kconfig | 2 ++
>  1 file changed, 2 insertions(+)
>
> diff --git a/arch/riscv/Kconfig b/arch/riscv/Kconfig
> index fe5281398543..2724dc2af29f 100644
> --- a/arch/riscv/Kconfig
> +++ b/arch/riscv/Kconfig
> @@ -16,6 +16,8 @@ config RISCV
>         select ACPI_REDUCED_HARDWARE_ONLY if ACPI
>         select ARCH_DMA_DEFAULT_COHERENT
>         select ARCH_ENABLE_HUGEPAGE_MIGRATION if HUGETLB_PAGE && MIGRATION
> +       select ARCH_ENABLE_MEMORY_HOTPLUG if SPARSEMEM_VMEMMAP && 64BIT && MMU

Not sure you need 64BIT && MMU here since ARCH_SPARSEMEM_ENABLE
depends on MMU and SPARSEMEM_VMEMMAP_ENABLE is only enabled on 64BIT.

> +       select ARCH_ENABLE_MEMORY_HOTREMOVE if MEMORY_HOTPLUG
>         select ARCH_ENABLE_SPLIT_PMD_PTLOCK if PGTABLE_LEVELS > 2
>         select ARCH_ENABLE_THP_MIGRATION if TRANSPARENT_HUGEPAGE
>         select ARCH_HAS_BINFMT_FLAT
> --
> 2.40.1
>

But anyway, to me that does not require a new version so you can add:

Reviewed-by: Alexandre Ghiti <alexghiti at rivosinc.com>

Thanks,

Alex