linux-kernel - Re: [PATCH 1/2] arm64/mm: define ARCH_SUPPORTS_SPECULATIVE_PAGE

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Message-ID: <1bc3ec9e-606b-e019-f870-ce4a2520cdbf@codeaurora.org>
Date:   Thu, 3 May 2018 14:18:32 +0530
From:   Chintan Pandya <cpandya@...eaurora.org>
To:     Ganesh Mahendran <opensource.ganesh@...il.com>,
        ldufour@...ux.vnet.ibm.com, catalin.marinas@....com,
        will.deacon@....com
Cc:     linux-mm@...ck.org, linux-kernel@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH 1/2] arm64/mm: define ARCH_SUPPORTS_SPECULATIVE_PAGE_FAULT



On 5/2/2018 1:24 PM, Ganesh Mahendran wrote:
> Set ARCH_SUPPORTS_SPECULATIVE_PAGE_FAULT for arm64. This
> enables Speculative Page Fault handler.
> 
> Signed-off-by: Ganesh Mahendran <opensource.ganesh@...il.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
>   	help
>   	  ARM 64-bit (AArch64) Linux support.
>   
> 

You may also consider re-ordering of patches in next version. Generally,
config enablement assumes effectiveness of that config.

Chintan
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