[PATCH v12 02/31] x86/mm: define ARCH_SUPPORTS_SPECULATIVE_PAGE_FAULT

[Jerome Glisse]

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 at linutronix.de>
> Signed-off-by: Laurent Dufour <ldufour at 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: Jérôme Glisse <jglisse at 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
>