linux-kernel - Re: [PATCH V8 37/44] memremap_pages: Set PKS PKey in PTEs if PGMAP

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Message-ID: <CAPcyv4go5pqWdvR7w7kDjOKQywTUwZ=Tbn-LSmOyE-4GdhZsmg@mail.gmail.com>
Date:   Fri, 4 Feb 2022 09:41:59 -0800
From:   Dan Williams <dan.j.williams@...el.com>
To:     "Weiny, Ira" <ira.weiny@...el.com>
Cc:     Dave Hansen <dave.hansen@...ux.intel.com>,
        "H. Peter Anvin" <hpa@...or.com>,
        Fenghua Yu <fenghua.yu@...el.com>,
        Rick Edgecombe <rick.p.edgecombe@...el.com>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH V8 37/44] memremap_pages: Set PKS PKey in PTEs if
 PGMAP_PROTECTIONS is requested

On Thu, Jan 27, 2022 at 9:55 AM <ira.weiny@...el.com> wrote:
>
> From: Ira Weiny <ira.weiny@...el.com>
>
> When the user requests protections the dev_pagemap mappings need to have
> a PKEY set.
>
> Define devmap_protection_adjust_pgprot() to add the PKey to the page
> protections.  Call it when PGMAP_PROTECTIONS is requested when remapping
> pages.
>
> Signed-off-by: Ira Weiny <ira.weiny@...el.com>
> ---

Does this patch have a reason to exist independent of the patch that
introduced devmap_protection_enable()?

Otherwise looks ok.