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Date:   Thu, 18 Apr 2019 17:48:46 -0400
From:   Jerome Glisse <jglisse@redhat.com>
To:     Laurent Dufour <ldufour@linux.ibm.com>
Cc:     akpm@linux-foundation.org, mhocko@kernel.org, peterz@infradead.org,
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        mpe@ellerman.id.au, paulus@samba.org,
        Thomas Gleixner <tglx@linutronix.de>,
        Ingo Molnar <mingo@redhat.com>, hpa@zytor.com,
        Will Deacon <will.deacon@arm.com>,
        Sergey Senozhatsky <sergey.senozhatsky@gmail.com>,
        sergey.senozhatsky.work@gmail.com,
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        paulmck@linux.vnet.ibm.com, Tim Chen <tim.c.chen@linux.intel.com>,
        linuxppc-dev@lists.ozlabs.org, x86@kernel.org
Subject: Re: [PATCH v12 02/31] x86/mm: define
 ARCH_SUPPORTS_SPECULATIVE_PAGE_FAULT
Message-ID: <20190418214846.GB11645@redhat.com>
References: <20190416134522.17540-1-ldufour@linux.ibm.com>
 <20190416134522.17540-3-ldufour@linux.ibm.com>
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On Tue, Apr 16, 2019 at 03:44:53PM +0200, Laurent Dufour wrote:
> Set ARCH_SUPPORTS_SPECULATIVE_PAGE_FAULT which turns on the
> Speculative Page Fault handler when building for 64bit.
> 
> Cc: Thomas Gleixner <tglx@linutronix.de>
> Signed-off-by: Laurent Dufour <ldufour@linux.ibm.com>

I think this patch should be move as last patch in the serie so that
the feature is not enabled mid-way without all the pieces ready if
someone bisect. But i have not review everything yet so maybe it is
fine.

Reviewed-by: J?r?me Glisse <jglisse@redhat.com>

> ---
>  arch/x86/Kconfig | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
> index 0f2ab09da060..8bd575184d0b 100644
> --- a/arch/x86/Kconfig
> +++ b/arch/x86/Kconfig
> @@ -30,6 +30,7 @@ config X86_64
>  	select SWIOTLB
>  	select X86_DEV_DMA_OPS
>  	select ARCH_HAS_SYSCALL_WRAPPER
> +	select ARCH_SUPPORTS_SPECULATIVE_PAGE_FAULT
>  
>  #
>  # Arch settings
> -- 
> 2.21.0
>