Re: [PATCH v12 03/31] powerpc/mm: set ARCH_SUPPORTS_SPECULATIVE_PAGE_FAULT

[Jerome Glisse]

On Tue, Apr 16, 2019 at 03:44:54PM +0200, Laurent Dufour wrote:
> Set ARCH_SUPPORTS_SPECULATIVE_PAGE_FAULT for BOOK3S_64. This enables
> the Speculative Page Fault handler.
> 
> Support is only provide for BOOK3S_64 currently because:
> - require CONFIG_PPC_STD_MMU because checks done in
>   set_access_flags_filter()
> - require BOOK3S because we can't support for book3e_hugetlb_preload()
>   called by update_mmu_cache()
> 
> Cc: Michael Ellerman <mpe@xxxxxxxxxxxxxx>
> Signed-off-by: Laurent Dufour <ldufour@xxxxxxxxxxxxx>

Same comment as for x86.

Reviewed-by: Jérôme Glisse <jglisse@xxxxxxxxxx>

> ---
>  arch/powerpc/Kconfig | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig
> index 2d0be82c3061..a29887ea5383 100644
> --- a/arch/powerpc/Kconfig
> +++ b/arch/powerpc/Kconfig
> @@ -238,6 +238,7 @@ config PPC
>  	select PCI_SYSCALL			if PCI
>  	select RTC_LIB
>  	select SPARSE_IRQ
> +	select ARCH_SUPPORTS_SPECULATIVE_PAGE_FAULT if PPC_BOOK3S_64
>  	select SYSCTL_EXCEPTION_TRACE
>  	select THREAD_INFO_IN_TASK
>  	select VIRT_TO_BUS			if !PPC64
> -- 
> 2.21.0
>