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 Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id DD85BC7EE2C for ; Mon, 15 May 2023 17:46:54 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1pycH4-0006QC-Nf; Mon, 15 May 2023 13:46:18 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1pycH3-0006Pw-DR for qemu-devel@nongnu.org; Mon, 15 May 2023 13:46:17 -0400 Received: from us-smtp-delivery-124.mimecast.com ([170.10.133.124]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1pycH1-00076b-81 for qemu-devel@nongnu.org; Mon, 15 May 2023 13:46:16 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1684172773; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=/Qibu7BpovhZATYhi3t1ZHYhDdTEDgQYz2uCmeZqdPo=; b=M6RefVbsgelsXuJGjEHxxLyHvbULymL5ZLA2CMHC+6PTqvUyklLW1RBNcIZjQQK9UlPnR4 eO3J9Iexl0RQ3vjoNe9Y0YEKdsHERWD8AtuDT6d6w1sbqrrZbQeDZKSNxtuLKUVMcHr4FJ LkARqpxCETgOYkbswF/GtyIvffC+MtQ= Received: from mail-wm1-f72.google.com (mail-wm1-f72.google.com [209.85.128.72]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-664-wRxtr8WyOYKjFY5J9SBvDg-1; Mon, 15 May 2023 13:46:11 -0400 X-MC-Unique: wRxtr8WyOYKjFY5J9SBvDg-1 Received: by mail-wm1-f72.google.com with SMTP id 5b1f17b1804b1-3f348182ffcso78560825e9.3 for ; Mon, 15 May 2023 10:46:10 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1684172769; x=1686764769; h=in-reply-to:content-transfer-encoding:content-disposition :mime-version:references:message-id:subject:cc:to:from:date :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=/Qibu7BpovhZATYhi3t1ZHYhDdTEDgQYz2uCmeZqdPo=; b=ZHq7YlKbaTSzosvtNCdOMlwRf9xp8nYTZHsG0CNDBQ4MSlYmUGMvbs5ofJaaOCwUCt GDDKoVOI2859Aj1MDPeRe3X5W4wjOcLtlHXx/0m0M8tbLCHXjiKNHkAW86pIkh+JfVRa +MnwVkV4pOIu2CYkuhm28g64Rva4ZkK8MsIgPhH18kAwJFjvUo+XLqxIZWVAHoNtteHW Pqt5Mo/dvI9FWrzh3YXXxMbf/bTNE5dk/UpM32oX9ypYw6o7KCoPiLmpKvEIRIkNg1wn qlHHQDIT1xO+NUcUFWgzPhPIln5HNcJhlx8iLGHopNUYhBZYuZ9+LdQ5UuTFF2475Xok d8wA== X-Gm-Message-State: AC+VfDwqw0j7y+RHow4KQHcnYAhuV3C4TeygQD3HI6p622pWlk/2yeuR l17ZYRo3MgBSxtibuuZJoYrFJ995DEmsghWPmr+3xTETwiCf0sl/DMzkV0DpxQGd5uUwudCVfui XYKIHppLDXCR04D4= X-Received: by 2002:a5d:6442:0:b0:306:32be:f0fe with SMTP id d2-20020a5d6442000000b0030632bef0femr22161183wrw.67.1684172769439; Mon, 15 May 2023 10:46:09 -0700 (PDT) X-Google-Smtp-Source: ACHHUZ58Abpbqkp9oQL+XNp2ohGErROjlIICuPgmTkrOE8DUsbhIHtFzgJaxvg7yP8HtbMtwUoZPpA== X-Received: by 2002:a5d:6442:0:b0:306:32be:f0fe with SMTP id d2-20020a5d6442000000b0030632bef0femr22161173wrw.67.1684172769076; Mon, 15 May 2023 10:46:09 -0700 (PDT) Received: from redhat.com ([2.52.26.5]) by smtp.gmail.com with ESMTPSA id a13-20020adff7cd000000b0030632833e74sm471804wrq.11.2023.05.15.10.46.07 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 15 May 2023 10:46:08 -0700 (PDT) Date: Mon, 15 May 2023 13:46:05 -0400 From: "Michael S. Tsirkin" To: Warner Losh Cc: Michael Tokarev , QEMU Developers , Markus Armbruster Subject: Re: missing boot rom: is it really a fatal error? Message-ID: <20230515134512-mutt-send-email-mst@kernel.org> References: <20230508062407-mutt-send-email-mst@kernel.org> <5492f69f-021d-cf25-5a92-8310255fddca@msgid.tls.msk.ru> <20230508074529-mutt-send-email-mst@kernel.org> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: Received-SPF: pass client-ip=170.10.133.124; envelope-from=mst@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.001, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H2=-0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org On Mon, May 15, 2023 at 10:02:43AM -0600, Warner Losh wrote: > > > On Mon, May 8, 2023 at 5:48 AM Michael S. Tsirkin wrote: > > On Mon, May 08, 2023 at 01:42:04PM +0300, Michael Tokarev wrote: > > 08.05.2023 13:28, Michael S. Tsirkin wrote: > > > On Sun, May 07, 2023 at 08:56:23PM +0300, Michael Tokarev wrote: > > .. > > > > > > I'm about to revert that old change on debian, to make it just a > warning instead > > > > of an error (the code is different now, but the same principle > applies), - because > > > > I dislike dependencies which are useless 99.9% of the time and are > trivial to > > > > install when actually needed. > > .. > > > I advise against it. > > > If you boot guest on a system with boot rom not installed you will not > > > be able to migrate to a system with boot rom installed. > > > why not? because we don't know how big to make the rom BAR. > > > And users will not discover until much much later after they have > > > painted themselves into a corner. > > > > Yes, I know about the migration. Actually there's an old bug report open > > against debian qemu package, - the context is similar to the old bios128 > > vs bios256 thing in qemu upstream, - boot roms might change in size too. > > > > In this context though, the talk is not about migration at all. The > missing > > dep is in Xen HVM qemu package, a xen-only build of qemu-system-i386. And > > this one fails to start unless the boot roms are provided. It is not even > > capable of migration to begin with :) > > > > Thank you for the reminder, - very useful. > > > > /mjt > > I guess we decided we'd rather not handle reports from users about net > boot not working. It's true most users don't need net boot but then > that's true for most qemu functionality - 99% of users > probably need 1% of the functionality. It's just a different 1% for each > user... > > > Yea, but to every user, their 1% is the most important thing ever... > Or so it seems some days :) > > Warner Yep. So I do not think we will be reverting this change in QEMU. -- MST