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[23.128.96.18]) by mx.google.com with ESMTP id gu14si4162392ejb.589.2020.07.01.09.36.17; Wed, 01 Jul 2020 09:36:40 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18; Authentication-Results: mx.google.com; dkim=pass header.i=@gmail.com header.s=20161025 header.b=UIQesNKy; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=QUARANTINE dis=NONE) header.from=gmail.com Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1732362AbgGAQeI (ORCPT + 99 others); Wed, 1 Jul 2020 12:34:08 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:42148 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1732255AbgGAQeI (ORCPT ); Wed, 1 Jul 2020 12:34:08 -0400 Received: from mail-io1-xd44.google.com (mail-io1-xd44.google.com [IPv6:2607:f8b0:4864:20::d44]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id EAB11C08C5C1 for ; Wed, 1 Jul 2020 09:34:07 -0700 (PDT) Received: by mail-io1-xd44.google.com with SMTP id q8so25689392iow.7 for ; Wed, 01 Jul 2020 09:34:07 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=MoybjELZfC8f+lXSCtoUVME2X9MJfIpV+bdz3fRbLPs=; b=UIQesNKyPGHb0LsgKEkEqKC04ivhJDSLff+nAYrcTcn1rxfacGjyvsw8a6MHdkh2OU dysTn5Deu/gEZ6sPLxswsTnoXY8MNBef2h7eQigzrb8i+UA/fScu+ZhchmeakIiuK9y5 lWUtPL1yADHz4EeusxKEafPF/8hJSssq923JNp/E/Yybr3deh+6cYHVsW2lzeTghXLxX ZgGXH5e5fXYPugjAkgWJ89Ps8b7S5pw8vRtOtrJAGP85BydIP5Dfzu/BNSxI6BNFh6FS ooCn2W2QvCgGubrpoe1aQ4cWXJ8lpknkPZs0MDAdOLmDkjGjoTOM3guUedfZID0WQTLx JHOg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=MoybjELZfC8f+lXSCtoUVME2X9MJfIpV+bdz3fRbLPs=; b=Iz2NVSLZE6SFjgdj7dDklkcrvPS8pNKajM74XCQpvUvhzEUks/0u/GozrZCjzJZnKK 1ukbVuVLI+O2W7nBoy5cIuy09lgzA6IEWNT7F6N7E600YIcjr/KrP8ZIYVkbYOfO2Rg6 gEY0WykafABSxTzPW9ZZGEfaxq06ADJXXZ+Cc0QfAPu+/6UkThau5Mf3J8CDtsqiEUS0 diU7NBtayIx8/tS6pAUc8tOsPuP2VIWQbwZxj8/xjLyMmPnTK8rNCxE69Dq6zE8avg0y ZtNOZDbBSa3uShaFIPnYuKcK9Wq795kgHSA0jKU80RegHgfXcBPKJ3vL03Rs+KCRoxw6 SGuw== X-Gm-Message-State: AOAM533mfje18ljVJqmEBUSvzH7bWe1RoHsurdwkLhDMs/dYiYEehcdX L71UlLnI7wDlsaewF+x4EJZl/QnW7St3rE6oow== X-Received: by 2002:a02:3501:: with SMTP id k1mr28948520jaa.133.1593621247338; Wed, 01 Jul 2020 09:34:07 -0700 (PDT) MIME-Version: 1.0 References: <20200701110650.16172-1-jgross@suse.com> <20200701110650.16172-2-jgross@suse.com> In-Reply-To: <20200701110650.16172-2-jgross@suse.com> From: Brian Gerst Date: Wed, 1 Jul 2020 12:33:56 -0400 Message-ID: Subject: Re: [PATCH v2 1/4] x86/xen: remove 32-bit Xen PV guest support To: Juergen Gross Cc: xen-devel , "the arch/x86 maintainers" , Linux Kernel Mailing List , Andy Lutomirski , Thomas Gleixner , Ingo Molnar , Borislav Petkov , "H. Peter Anvin" , Boris Ostrovsky , Stefano Stabellini Content-Type: text/plain; charset="UTF-8" Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, Jul 1, 2020 at 7:08 AM Juergen Gross 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