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=-17.3 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,NICE_REPLY_A,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED,USER_AGENT_SANE_1 autolearn=unavailable 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 27920C433F5 for ; Thu, 23 Sep 2021 15:25:49 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 131E160EE5 for ; Thu, 23 Sep 2021 15:25:49 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S242004AbhIWP1S (ORCPT ); Thu, 23 Sep 2021 11:27:18 -0400 Received: from smtp-out1.suse.de ([195.135.220.28]:37602 "EHLO smtp-out1.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S241999AbhIWP1D (ORCPT ); Thu, 23 Sep 2021 11:27:03 -0400 Received: from imap2.suse-dmz.suse.de (imap2.suse-dmz.suse.de [192.168.254.74]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (P-521) server-digest SHA512) (No client certificate requested) by smtp-out1.suse.de (Postfix) with ESMTPS id 6F8A622259; Thu, 23 Sep 2021 15:25:31 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.com; s=susede1; t=1632410731; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version:content-type:content-type: in-reply-to:in-reply-to:references:references; bh=4ej12isJcowNNLOgeaywRRKDnV7BrcTMYPQN4LE2jtM=; b=nk/pt2Cd+40MLiSy77vU9N0l6Hgyxkt9XZ6YBuEUBjCL/+lRzsPQKnh24s+RsgPJX+ufyX 5Zyvx/LsIrJW5w4gLm2dTqGpP01Tt+s6VnezQ6lNtSUTk+dfhmRR+BFczXPPmUiJPz8H05 4LG0d1lTw2IBepayEdBxxf5/TQIkxXw= Received: from imap2.suse-dmz.suse.de (imap2.suse-dmz.suse.de [192.168.254.74]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (P-521) server-digest SHA512) (No client certificate requested) by imap2.suse-dmz.suse.de (Postfix) with ESMTPS id 3927313E6E; Thu, 23 Sep 2021 15:25:31 +0000 (UTC) Received: from dovecot-director2.suse.de ([192.168.254.65]) by imap2.suse-dmz.suse.de with ESMTPSA id GFygDGucTGGrDgAAMHmgww (envelope-from ); Thu, 23 Sep 2021 15:25:31 +0000 To: Jan Beulich Cc: Stefano Stabellini , lkml , "xen-devel@lists.xenproject.org" , Boris Ostrovsky References: <4efa804e-3250-227f-00c7-347581366cd4@suse.com> <5af11027-cf9d-cf78-9f48-b2ce2edd6e62@suse.com> <2ded8c58-b9c3-89dc-6883-1794d1c4126a@suse.com> <89cb2d39-2bfc-dccf-8e92-39e4e952750d@suse.com> From: Juergen Gross Subject: Re: [PATCH 7/9] xen/x86: hook up xen_banner() also for PVH Message-ID: Date: Thu, 23 Sep 2021 17:25:30 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.12.0 MIME-Version: 1.0 In-Reply-To: Content-Type: multipart/signed; micalg=pgp-sha256; protocol="application/pgp-signature"; boundary="PFXOQuIsPnpM36gnvqC8IX13s63RGmP6X" Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This is an OpenPGP/MIME signed message (RFC 4880 and 3156) --PFXOQuIsPnpM36gnvqC8IX13s63RGmP6X Content-Type: multipart/mixed; boundary="mUFqiPeflUgtMo9r5bhO1fdNfDpEYCym1"; protected-headers="v1" From: Juergen Gross To: Jan Beulich Cc: Stefano Stabellini , lkml , "xen-devel@lists.xenproject.org" , Boris Ostrovsky Message-ID: Subject: Re: [PATCH 7/9] xen/x86: hook up xen_banner() also for PVH References: <4efa804e-3250-227f-00c7-347581366cd4@suse.com> <5af11027-cf9d-cf78-9f48-b2ce2edd6e62@suse.com> <2ded8c58-b9c3-89dc-6883-1794d1c4126a@suse.com> <89cb2d39-2bfc-dccf-8e92-39e4e952750d@suse.com> In-Reply-To: --mUFqiPeflUgtMo9r5bhO1fdNfDpEYCym1 Content-Type: multipart/mixed; boundary="------------C640D5E0E67FA74A447A863B" Content-Language: en-US This is a multi-part message in MIME format. --------------C640D5E0E67FA74A447A863B Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: quoted-printable On 23.09.21 17:19, Jan Beulich wrote: > On 23.09.2021 17:15, Juergen Gross wrote: >> On 23.09.21 17:10, Jan Beulich wrote: >>> On 23.09.2021 16:59, Juergen Gross wrote: >>>> On 07.09.21 12:11, Jan Beulich wrote: >>>>> This was effectively lost while dropping PVHv1 code. Move the funct= ion >>>>> and arrange for it to be called the same way as done in PV mode. Cl= early >>>>> this then needs re-introducing the XENFEAT_mmu_pt_update_preserve_a= d >>>>> check that was recently removed, as that's a PV-only feature. >>>>> >>>>> Signed-off-by: Jan Beulich >>>>> >>>>> --- a/arch/x86/xen/enlighten.c >>>>> +++ b/arch/x86/xen/enlighten.c >>>>> @@ -261,6 +261,18 @@ int xen_vcpu_setup(int cpu) >>>>> return ((per_cpu(xen_vcpu, cpu) =3D=3D NULL) ? -ENODEV : 0); >>>>> } >>>>> =20 >>>>> +void __init xen_banner(void) >>>>> +{ >>>>> + unsigned version =3D HYPERVISOR_xen_version(XENVER_version, NULL)= ; >>>>> + struct xen_extraversion extra; >>>> >>>> Please add a blank line here. >>> >>> Oops. >>> >>>>> + HYPERVISOR_xen_version(XENVER_extraversion, &extra); >>>>> + >>>>> + pr_info("Booting paravirtualized kernel on %s\n", pv_info.name); >>>> >>>> Is this correct? I don't think the kernel needs to be paravirtualize= d >>>> with PVH (at least not to the same extend as for PV). >>> >>> What else do you suggest the message to say? Simply drop >>> "paravirtualized"? To some extent it is applicable imo, further >>> qualified by pv_info.name. And that's how it apparently was with >>> PVHv1. >> >> The string could be selected depending on CONFIG_XEN_PV. >=20 > Hmm, now I'm confused: Doesn't this setting control whether the kernel > can run in PV mode? If so, that functionality being present should have= > no effect on the functionality of the kernel when running in PVH mode. > So what you suggest would end up in misleading information imo. Hmm, yes, I mixed "paravirtualized" with "capable to run paravirtualized". So the string should depend on xen_pv_domain(). 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