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References: <20240521114830.841660-1-bjorn@kernel.org> <20240521114830.841660-8-bjorn@kernel.org>
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From: Alexandre Ghiti <alexghiti@rivosinc.com>
Date: Tue, 21 May 2024 15:23:47 +0200
Message-ID: <CAHVXubjQr1xzKcjRgB8zA3opj6N93PGpF2=5yKkKK6R07Rpntg@mail.gmail.com>
Subject: Re: [PATCH v3 7/9] riscv: Enable memory hotplugging for RISC-V
To: =?UTF-8?B?QmrDtnJuIFTDtnBlbA==?= <bjorn@kernel.org>
Cc: Albert Ou <aou@eecs.berkeley.edu>, David Hildenbrand <david@redhat.com>, 
	Palmer Dabbelt <palmer@dabbelt.com>, Paul Walmsley <paul.walmsley@sifive.com>, 
	linux-riscv@lists.infradead.org, Oscar Salvador <osalvador@suse.de>, 
	=?UTF-8?B?QmrDtnJuIFTDtnBlbA==?= <bjorn@rivosinc.com>, 
	Andrew Bresticker <abrestic@rivosinc.com>, 
	Chethan Seshadri <Chethan.Seshadri@catalinasystems.io>, Lorenzo Stoakes <lstoakes@gmail.com>, 
	Santosh Mamila <santosh.mamila@catalinasystems.io>, 
	Sivakumar Munnangi <siva.munnangi@catalinasystems.io>, Sunil V L <sunilvl@ventanamicro.com>, 
	linux-kernel@vger.kernel.org, linux-mm@kvack.org, 
	virtualization@lists.linux-foundation.org
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On Tue, May 21, 2024 at 1:49=E2=80=AFPM Bj=C3=B6rn T=C3=B6pel <bjorn@kernel=
org> wrote:
>
> From: Bj=C3=B6rn T=C3=B6pel <bjorn@rivosinc.com>
>
> Enable ARCH_ENABLE_MEMORY_HOTPLUG and ARCH_ENABLE_MEMORY_HOTREMOVE for
> RISC-V.
>
> Signed-off-by: Bj=C3=B6rn T=C3=B6pel <bjorn@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 && MIGRATIO=
N
> +       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@rivosinc.com>

Thanks,

Alex