linux-kernel - Re: [PATCH] x86/paravirt: merge activate_mm and dup

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Message-ID: <12462e10-ae39-b198-b159-9c621eb5119d@oracle.com>
Date:   Thu, 12 Jan 2023 14:44:07 -0500
From:   Boris Ostrovsky <boris.ostrovsky@...cle.com>
To:     Juergen Gross <jgross@...e.com>, linux-kernel@...r.kernel.org,
        x86@...nel.org, virtualization@...ts.linux-foundation.org
Cc:     Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>,
        Dave Hansen <dave.hansen@...ux.intel.com>,
        "H. Peter Anvin" <hpa@...or.com>,
        "Srivatsa S. Bhat (VMware)" <srivatsa@...il.mit.edu>,
        Alexey Makhalov <amakhalov@...are.com>,
        VMware PV-Drivers Reviewers <pv-drivers@...are.com>,
        xen-devel@...ts.xenproject.org
Subject: Re: [PATCH] x86/paravirt: merge activate_mm and dup_mmap callbacks


On 1/12/23 10:21 AM, Juergen Gross wrote:
> The two paravirt callbacks .mmu.activate_mm and .mmu.dup_mmap are
> sharing the same implementations in all cases: for Xen PV guests they
> are pinning the PGD of the new mm_struct, and for all other cases
> they are a NOP.
>
> So merge them to a common callback .mmu.enter_mmap (in contrast to the
> corresponding already existing .mmu.exit_mmap).
>
> As the first parameter of the old callbacks isn't used, drop it from
> the replacement one.
>
> Signed-off-by: Juergen Gross <jgross@...e.com>


Reviewed-by: Boris Ostrovsky <boris.ostrovsky@...cle.com>