linux-kernel - Re: [RFC PATCH 1/4] mm: pagewalk: add the ability to install PTEs

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Message-ID: <78fb890a-a901-4616-86e8-cf56eea89ab2@lucifer.local>
Date: Mon, 14 Oct 2024 12:10:24 +0100
From: Lorenzo Stoakes <lorenzo.stoakes@...cle.com>
To: Jann Horn <jannh@...gle.com>
Cc: Andrew Morton <akpm@...ux-foundation.org>,
        Suren Baghdasaryan <surenb@...gle.com>,
        "Liam R . Howlett" <Liam.Howlett@...cle.com>,
        Matthew Wilcox <willy@...radead.org>, Vlastimil Babka <vbabka@...e.cz>,
        "Paul E . McKenney" <paulmck@...nel.org>,
        David Hildenbrand <david@...hat.com>, linux-mm@...ck.org,
        linux-kernel@...r.kernel.org, Muchun Song <muchun.song@...ux.dev>,
        Richard Henderson <richard.henderson@...aro.org>,
        Ivan Kokshaysky <ink@...assic.park.msu.ru>,
        Matt Turner <mattst88@...il.com>,
        Thomas Bogendoerfer <tsbogend@...ha.franken.de>,
        "James E . J . Bottomley" <James.Bottomley@...senpartnership.com>,
        Helge Deller <deller@....de>, Chris Zankel <chris@...kel.net>,
        Max Filippov <jcmvbkbc@...il.com>, Arnd Bergmann <arnd@...db.de>,
        linux-alpha@...r.kernel.org, linux-mips@...r.kernel.org,
        linux-parisc@...r.kernel.org, linux-arch@...r.kernel.org,
        Shuah Khan <shuah@...nel.org>, Christian Brauner <brauner@...nel.org>,
        linux-kselftest@...r.kernel.org,
        Sidhartha Kumar <sidhartha.kumar@...cle.com>
Subject: Re: [RFC PATCH 1/4] mm: pagewalk: add the ability to install PTEs

On Fri, Oct 11, 2024 at 08:11:28PM +0200, Jann Horn wrote:
> On Fri, Sep 27, 2024 at 2:51 PM Lorenzo Stoakes
> <lorenzo.stoakes@...cle.com> wrote:
> > Rather than add yet another implementation, we extend the generic pagewalk
> > logic to enable the installation of page table entries by adding a new
> > install_pte() callback in mm_walk_ops. If this is specified, then upon
> > encountering a missing page table entry, we allocate and install a new one
> > and continue the traversal.
> [...]
> >
> > Signed-off-by: Lorenzo Stoakes <lorenzo.stoakes@...cle.com>
>
> Reviewed-by: Jann Horn <jannh@...gle.com>

Thanks!