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 86D74C07E85 for ; Fri, 7 Dec 2018 06:02:20 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 4BEDD20882 for ; Fri, 7 Dec 2018 06:02:20 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 4BEDD20882 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=suse.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 S1726044AbeLGGCT (ORCPT ); Fri, 7 Dec 2018 01:02:19 -0500 Received: from mx2.suse.de ([195.135.220.15]:53828 "EHLO mx1.suse.de" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1725939AbeLGGCS (ORCPT ); Fri, 7 Dec 2018 01:02:18 -0500 X-Virus-Scanned: by amavisd-new at test-mx.suse.de Received: from relay1.suse.de (unknown [195.135.220.254]) by mx1.suse.de (Postfix) with ESMTP id 63E6FAF41; Fri, 7 Dec 2018 06:02:16 +0000 (UTC) Subject: Re: [PATCH v8 1/7] xen/pvh: Split CONFIG_XEN_PVH into CONFIG_PVH and CONFIG_XEN_PVH To: Paolo Bonzini , Maran Wilson , x86@kernel.org, linux-kernel@vger.kernel.org, xen-devel@lists.xenproject.org, kvm@vger.kernel.org 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: Juergen Gross Openpgp: preference=signencrypt Autocrypt: addr=jgross@suse.com; 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Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.3.0 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8 Content-Language: de-DE Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 06/12/2018 23:11, Paolo Bonzini wrote: > 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. The resulting kernel should be able to be booted either in PVH mode via the PVH entry point or the "normal" way via the still existing old entry point(s). It is an _additional_ way to boot the kernel, not an exclusive alternative. Juergen