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Subject: Re: [PATCH 1/2] arm64/mm: define ARCH_SUPPORTS_SPECULATIVE_PAGE_FAULT
To:     Ganesh Mahendran <opensource.ganesh@gmail.com>,
        catalin.marinas@arm.com, will.deacon@arm.com
Cc:     linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org,
        linux-mm@kvack.org
References: <1525247672-2165-1-git-send-email-opensource.ganesh@gmail.com>
From:   Laurent Dufour <ldufour@linux.vnet.ibm.com>
Date:   Wed, 2 May 2018 11:00:55 +0200
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On 02/05/2018 09:54, Ganesh Mahendran wrote:
> Set ARCH_SUPPORTS_SPECULATIVE_PAGE_FAULT for arm64. This
> enables Speculative Page Fault handler.
> 
> Signed-off-by: Ganesh Mahendran <opensource.ganesh@gmail.com>
> ---
> This patch is on top of Laurent's v10 spf
> ---
>  arch/arm64/Kconfig | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig
> index eb2cf49..cd583a9 100644
> --- a/arch/arm64/Kconfig
> +++ b/arch/arm64/Kconfig
> @@ -144,6 +144,7 @@ config ARM64
>  	select SPARSE_IRQ
>  	select SYSCTL_EXCEPTION_TRACE
>  	select THREAD_INFO_IN_TASK
> +	select ARCH_SUPPORTS_SPECULATIVE_PAGE_FAULT if SMP

There is no need to depend on SMP here as the upper
CONFIG_SPECULATIVE_PAGE_FAULT is depending on SMP.

>  	help
>  	  ARM 64-bit (AArch64) Linux support.
>