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Subject: Re: [PATCH 09/10] powerpc: Enable OpenCAPI Storage Class Memory
 driver on bare metal
To:     "Alastair D'Silva" <alastair@au1.ibm.com>, alastair@d-silva.org
Cc:     Oscar Salvador <osalvador@suse.com>,
        Madhavan Srinivasan <maddy@linux.vnet.ibm.com>,
        Geert Uytterhoeven <geert+renesas@glider.be>,
        David Hildenbrand <david@redhat.com>,
        Wei Yang <richard.weiyang@gmail.com>,
        Keith Busch <keith.busch@intel.com>, linux-mm@kvack.org,
        Michal Hocko <mhocko@suse.com>,
        Paul Mackerras <paulus@samba.org>,
        Ira Weiny <ira.weiny@intel.com>,
        Thomas Gleixner <tglx@linutronix.de>,
        Pavel Tatashin <pasha.tatashin@soleen.com>,
        Dave Jiang <dave.jiang@intel.com>, linux-nvdimm@lists.01.org,
        Vishal Verma <vishal.l.verma@intel.com>,
        Krzysztof Kozlowski <krzk@kernel.org>,
        Anju T Sudhakar <anju@linux.vnet.ibm.com>,
        Mahesh Salgaonkar <mahesh@linux.vnet.ibm.com>,
        Andrew Donnellan <ajd@linux.ibm.com>,
        Arnd Bergmann <arnd@arndb.de>, Greg Kurz <groug@kaod.org>,
        Qian Cai <cai@lca.pw>,
        =?UTF-8?Q?C=c3=a9dric_Le_Goater?= <clg@kaod.org>,
        Dan Williams <dan.j.williams@intel.com>,
        Hari Bathini <hbathini@linux.ibm.com>,
        Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        linux-kernel@vger.kernel.org,
        Vasant Hegde <hegdevasant@linux.vnet.ibm.com>,
        Andrew Morton <akpm@linux-foundation.org>,
        linuxppc-dev@lists.ozlabs.org
References: <20191025044721.16617-1-alastair@au1.ibm.com>
 <20191025044721.16617-10-alastair@au1.ibm.com>
From:   Frederic Barrat <fbarrat@linux.ibm.com>
Date:   Fri, 8 Nov 2019 08:10:56 +0100
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Le 25/10/2019 à 06:47, Alastair D'Silva a écrit :
> From: Alastair D'Silva <alastair@d-silva.org>
> 
> Enable OpenCAPI Storage Class Memory driver on bare metal
> 
> Signed-off-by: Alastair D'Silva <alastair@d-silva.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