linux-kernel - Re: [PATCH v2 1/4] x86/xen: remove 32-bit Xen PV guest support

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Message-ID: <CAMzpN2iuwv=05vpxeP6eyVqEH9_093gDtDV3QAXYQ2QrucznBQ@mail.gmail.com>
Date:   Wed, 1 Jul 2020 12:33:56 -0400
From:   Brian Gerst <brgerst@...il.com>
To:     Juergen Gross <jgross@...e.com>
Cc:     xen-devel <xen-devel@...ts.xenproject.org>,
        "the arch/x86 maintainers" <x86@...nel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Andy Lutomirski <luto@...nel.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>,
        "H. Peter Anvin" <hpa@...or.com>,
        Boris Ostrovsky <boris.ostrovsky@...cle.com>,
        Stefano Stabellini <sstabellini@...nel.org>
Subject: Re: [PATCH v2 1/4] x86/xen: remove 32-bit Xen PV guest support

On Wed, Jul 1, 2020 at 7:08 AM Juergen Gross <jgross@...e.com> wrote:
>
> Xen is requiring 64-bit machines today and since Xen 4.14 it can be
> built without 32-bit PV guest support. There is no need to carry the
> burden of 32-bit PV guest support in the kernel any longer, as new
> guests can be either HVM or PVH, or they can use a 64 bit kernel.
>
> Remove the 32-bit Xen PV support from the kernel.

If you send a v3, it would be better to split the move of the 64-bit
code into xen-asm.S into a separate patch.

--
Brian Gerst