From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-1.0 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_PASS autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id A720EC64EB1 for ; Thu, 6 Dec 2018 22:11:53 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 71790208E7 for ; Thu, 6 Dec 2018 22:11:53 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 71790208E7 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=redhat.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726166AbeLFWLw (ORCPT ); Thu, 6 Dec 2018 17:11:52 -0500 Received: from mx1.redhat.com ([209.132.183.28]:36850 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726035AbeLFWLv (ORCPT ); Thu, 6 Dec 2018 17:11:51 -0500 Received: from smtp.corp.redhat.com (int-mx01.intmail.prod.int.phx2.redhat.com [10.5.11.11]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id B4EFDDC8E8; Thu, 6 Dec 2018 22:11:50 +0000 (UTC) Received: from [10.36.112.16] (ovpn-112-16.ams2.redhat.com [10.36.112.16]) by smtp.corp.redhat.com (Postfix) with ESMTPS id 2D224600C4; Thu, 6 Dec 2018 22:11:42 +0000 (UTC) Subject: Re: [PATCH v8 1/7] xen/pvh: Split CONFIG_XEN_PVH into CONFIG_PVH and CONFIG_XEN_PVH To: Maran Wilson , x86@kernel.org, linux-kernel@vger.kernel.org, xen-devel@lists.xenproject.org, kvm@vger.kernel.org, jgross@suse.com Cc: tglx@linutronix.de, mingo@redhat.com, hpa@zytor.com, boris.ostrovsky@oracle.com, jpoimboe@redhat.com, kirill.shutemov@linux.intel.com, bp@suse.de, thomas.lendacky@amd.com, luto@kernel.org, dave.hansen@linux.intel.com, roger.pau@citrix.com, rkrcmar@redhat.com, rdunlap@infradead.org References: <1544076152-21637-1-git-send-email-maran.wilson@oracle.com> <1544076257-21792-1-git-send-email-maran.wilson@oracle.com> From: Paolo Bonzini Openpgp: preference=signencrypt Autocrypt: addr=pbonzini@redhat.com; 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Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.3.1 MIME-Version: 1.0 In-Reply-To: <1544076257-21792-1-git-send-email-maran.wilson@oracle.com> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 8bit X-Scanned-By: MIMEDefang 2.79 on 10.5.11.11 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.38]); Thu, 06 Dec 2018 22:11:51 +0000 (UTC) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 06/12/18 07:04, Maran Wilson wrote: > +config PVH > + bool "Support for running PVH guests" > + ---help--- > + This option enables the PVH entry point for guest virtual machines > + as specified in the x86/HVM direct boot ABI. > + IIUC this breaks "normal" bzImage boot, so we should have something like The resulting kernel will not boot with most x86 boot loaders such as GRUB or SYSLINUX. Unless you plan to start the kernel using QEMU or Xen, you probably want to say N here. and also depends on !EFI because even though in principle it would be possible to write a PVH loader for UEFI, PVH's start info does not support the EFI handover protocol. Paolo