linux-kernel - Re: [PATCH v3 0/6] Fix and enable pmem as RAM device on arm64

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Message-ID: <CAPcyv4iqkuzyU_u+VW1nsaK7tiy+HJtUxLtgAxtfX0aXXcKhfA@mail.gmail.com>
Date:   Fri, 31 Jul 2020 08:28:58 -0700
From:   Dan Williams <dan.j.williams@...el.com>
To:     Jia He <justin.he@....com>
Cc:     Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will@...nel.org>, Tony Luck <tony.luck@...el.com>,
        Fenghua Yu <fenghua.yu@...el.com>,
        Yoshinori Sato <ysato@...rs.sourceforge.jp>,
        Rich Felker <dalias@...c.org>,
        Dave Hansen <dave.hansen@...ux.intel.com>,
        Andy Lutomirski <luto@...nel.org>,
        Peter Zijlstra <peterz@...radead.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>,
        David Hildenbrand <david@...hat.com>, X86 ML <x86@...nel.org>,
        "H. Peter Anvin" <hpa@...or.com>,
        Vishal Verma <vishal.l.verma@...el.com>,
        Dave Jiang <dave.jiang@...el.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Baoquan He <bhe@...hat.com>,
        Chuhong Yuan <hslester96@...il.com>,
        Mike Rapoport <rppt@...ux.ibm.com>,
        Logan Gunthorpe <logang@...tatee.com>,
        Masahiro Yamada <masahiroy@...nel.org>,
        Michal Hocko <mhocko@...e.com>,
        Linux ARM <linux-arm-kernel@...ts.infradead.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        linux-ia64@...r.kernel.org, Linux-sh <linux-sh@...r.kernel.org>,
        linux-nvdimm <linux-nvdimm@...ts.01.org>,
        Linux MM <linux-mm@...ck.org>,
        Jonathan Cameron <Jonathan.Cameron@...wei.com>,
        Kaly Xin <Kaly.Xin@....com>
Subject: Re: [PATCH v3 0/6] Fix and enable pmem as RAM device on arm64

On Wed, Jul 8, 2020 at 7:06 PM Jia He <justin.he@....com> wrote:
>
> This fixies a few issues when I tried to enable pmem as RAM device on arm64.

What NVDIMM bus driver is being used in this case? The ACPI NFIT
driver? I'm just looking to see if currently deployed
phys_to_target_node() is sufficient, or if this is coming in a new
driver?