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

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20180502122314.GB30246@arm.com>
Date:   Wed, 2 May 2018 13:23:14 +0100
From:   Will Deacon <will.deacon@....com>
To:     Ganesh Mahendran <opensource.ganesh@...il.com>
Cc:     ldufour@...ux.vnet.ibm.com, catalin.marinas@....com,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        linux-mm@...ck.org
Subject: Re: [PATCH 1/2] arm64/mm: define ARCH_SUPPORTS_SPECULATIVE_PAGE_FAULT

On Wed, May 02, 2018 at 03:53:21PM +0800, Ganesh Mahendran wrote:
> Set ARCH_SUPPORTS_SPECULATIVE_PAGE_FAULT for arm64. This
> enables Speculative Page Fault handler.

Are there are tests for this? I'm really nervous about enabling it...

Will

> 
> 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.
>  
> -- 
> 1.9.1
>