linux-kernel - Re: [PATCH] riscv: enable HAVE_ARCH_HUGE

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Date: Mon, 27 May 2024 08:53:56 +0200
From: Alexandre Ghiti <alex@...ti.fr>
To: Nam Cao <namcao@...utronix.de>, Alexandre Ghiti <alexghiti@...osinc.com>,
 Paul Walmsley <paul.walmsley@...ive.com>, Palmer Dabbelt
 <palmer@...belt.com>, Albert Ou <aou@...s.berkeley.edu>,
 linux-riscv@...ts.infradead.org, linux-kernel@...r.kernel.org
Cc: stable@...r.kernel.org
Subject: Re: [PATCH] riscv: enable HAVE_ARCH_HUGE_VMAP for XIP kernel

Hi Nam,

On 26/05/2024 13:01, Nam Cao wrote:
> HAVE_ARCH_HUGE_VMAP also works on XIP kernel, so remove its dependency on
> !XIP_KERNEL.
>
> This also fixes a boot problem for XIP kernel introduced by the commit in
> "Fixes:". This commit used huge page mapping for vmemmap, but huge page
> vmap was not enabled for XIP kernel.
>
> Fixes: ff172d4818ad ("riscv: Use hugepage mappings for vmemmap")
> Signed-off-by: Nam Cao <namcao@...utronix.de>
> Cc: <stable@...r.kernel.org>
> ---
> This patch replaces:
> https://patchwork.kernel.org/project/linux-riscv/patch/20240508173116.2866192-1-namcao@linutronix.de/
>
>   arch/riscv/Kconfig | 2 +-
>   1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/arch/riscv/Kconfig b/arch/riscv/Kconfig
> index b94176e25be1..0525ee2d63c7 100644
> --- a/arch/riscv/Kconfig
> +++ b/arch/riscv/Kconfig
> @@ -106,7 +106,7 @@ config RISCV
>   	select HAS_IOPORT if MMU
>   	select HAVE_ARCH_AUDITSYSCALL
>   	select HAVE_ARCH_HUGE_VMALLOC if HAVE_ARCH_HUGE_VMAP
> -	select HAVE_ARCH_HUGE_VMAP if MMU && 64BIT && !XIP_KERNEL
> +	select HAVE_ARCH_HUGE_VMAP if MMU && 64BIT
>   	select HAVE_ARCH_JUMP_LABEL if !XIP_KERNEL
>   	select HAVE_ARCH_JUMP_LABEL_RELATIVE if !XIP_KERNEL
>   	select HAVE_ARCH_KASAN if MMU && 64BIT


Great, thanks!

Reviewed-by: Alexandre Ghiti <alexghiti@...osinc.com>

Alex