linux-kernel - Re: [PATCH 09/10] powerpc: Enable OpenCAPI Storage Class Memory driver on bare metal

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Message-Id: <3ba57ce6-9135-0d83-b99d-1c5b0c744855@linux.ibm.com>
Date:   Fri, 8 Nov 2019 08:10:56 +0100
From:   Frederic Barrat <fbarrat@...ux.ibm.com>
To:     "Alastair D'Silva" <alastair@....ibm.com>, alastair@...ilva.org
Cc:     Oscar Salvador <osalvador@...e.com>,
        Madhavan Srinivasan <maddy@...ux.vnet.ibm.com>,
        Geert Uytterhoeven <geert+renesas@...der.be>,
        David Hildenbrand <david@...hat.com>,
        Wei Yang <richard.weiyang@...il.com>,
        Keith Busch <keith.busch@...el.com>, linux-mm@...ck.org,
        Michal Hocko <mhocko@...e.com>,
        Paul Mackerras <paulus@...ba.org>,
        Ira Weiny <ira.weiny@...el.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Pavel Tatashin <pasha.tatashin@...een.com>,
        Dave Jiang <dave.jiang@...el.com>, linux-nvdimm@...ts.01.org,
        Vishal Verma <vishal.l.verma@...el.com>,
        Krzysztof Kozlowski <krzk@...nel.org>,
        Anju T Sudhakar <anju@...ux.vnet.ibm.com>,
        Mahesh Salgaonkar <mahesh@...ux.vnet.ibm.com>,
        Andrew Donnellan <ajd@...ux.ibm.com>,
        Arnd Bergmann <arnd@...db.de>, Greg Kurz <groug@...d.org>,
        Qian Cai <cai@....pw>,
        Cédric Le Goater <clg@...d.org>,
        Dan Williams <dan.j.williams@...el.com>,
        Hari Bathini <hbathini@...ux.ibm.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        linux-kernel@...r.kernel.org,
        Vasant Hegde <hegdevasant@...ux.vnet.ibm.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        linuxppc-dev@...ts.ozlabs.org
Subject: Re: [PATCH 09/10] powerpc: Enable OpenCAPI Storage Class Memory
 driver on bare metal



Le 25/10/2019 à 06:47, Alastair D'Silva a écrit :
> From: Alastair D'Silva <alastair@...ilva.org>
> 
> Enable OpenCAPI Storage Class Memory driver on bare metal
> 
> Signed-off-by: Alastair D'Silva <alastair@...ilva.org>
> ---
>   arch/powerpc/configs/powernv_defconfig | 4 ++++
>   1 file changed, 4 insertions(+)
> 
> diff --git a/arch/powerpc/configs/powernv_defconfig b/arch/powerpc/configs/powernv_defconfig
> index 6658cceb928c..45c0eff94964 100644
> --- a/arch/powerpc/configs/powernv_defconfig
> +++ b/arch/powerpc/configs/powernv_defconfig
> @@ -352,3 +352,7 @@ CONFIG_KVM_BOOK3S_64=m
>   CONFIG_KVM_BOOK3S_64_HV=m
>   CONFIG_VHOST_NET=m
>   CONFIG_PRINTK_TIME=y
> +CONFIG_OCXL_SCM=m
> +CONFIG_DEV_DAX=y
> +CONFIG_DEV_DAX_PMEM=y
> +CONFIG_FS_DAX=y


If this really the intent or do we want to activate DAX only if 
CONFIG_OCXL_SCM is enabled?

   Fred