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=-0.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS autolearn=no 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 4B285C7618B for ; Fri, 26 Jul 2019 12:46:43 +0000 (UTC) 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 mail.kernel.org (Postfix) with ESMTPS id 207F82238C for ; Fri, 26 Jul 2019 12:46:43 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 207F82238C Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=redhat.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Received: from localhost ([::1]:39630 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.86_2) (envelope-from ) id 1hqzcQ-0000OC-53 for qemu-devel@archiver.kernel.org; Fri, 26 Jul 2019 08:46:42 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:50918) by lists.gnu.org with esmtp (Exim 4.86_2) (envelope-from ) id 1hqzcF-0008R7-2w for qemu-devel@nongnu.org; Fri, 26 Jul 2019 08:46:31 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1hqzcE-0007ZW-1Q for qemu-devel@nongnu.org; Fri, 26 Jul 2019 08:46:30 -0400 Received: from mx1.redhat.com ([209.132.183.28]:35758) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1hqzcD-0007Uv-RE for qemu-devel@nongnu.org; Fri, 26 Jul 2019 08:46:29 -0400 Received: from smtp.corp.redhat.com (int-mx06.intmail.prod.int.phx2.redhat.com [10.5.11.16]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 8B3913082B44; Fri, 26 Jul 2019 12:46:27 +0000 (UTC) Received: from localhost (unknown [10.43.2.182]) by smtp.corp.redhat.com (Postfix) with ESMTP id 90BEA36FB; Fri, 26 Jul 2019 12:46:17 +0000 (UTC) Date: Fri, 26 Jul 2019 14:46:15 +0200 From: Igor Mammedov To: "Michael S. Tsirkin" Message-ID: <20190726144615.6ed811de@redhat.com> In-Reply-To: <20190725133500-mutt-send-email-mst@kernel.org> References: <87pnlymm47.fsf@redhat.com> <20190725080556-mutt-send-email-mst@kernel.org> <87muh2mazh.fsf@redhat.com> <20190725104721-mutt-send-email-mst@kernel.org> <20190725110114-mutt-send-email-mst@kernel.org> <20190725133500-mutt-send-email-mst@kernel.org> MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit X-Scanned-By: MIMEDefang 2.79 on 10.5.11.16 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.45]); Fri, 26 Jul 2019 12:46:27 +0000 (UTC) X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 209.132.183.28 Subject: Re: [Qemu-devel] [PATCH v3 0/4] Introduce the microvm machine type X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Peter Maydell , Eduardo Habkost , Sergio Lopez , Maran Wilson , Stefan Hajnoczi , QEMU Developers , Gerd Hoffmann , Paolo Bonzini , Richard Henderson , Stefano Garzarella Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" On Thu, 25 Jul 2019 13:38:48 -0400 "Michael S. Tsirkin" wrote: > On Thu, Jul 25, 2019 at 05:39:39PM +0200, Paolo Bonzini wrote: > > On 25/07/19 17:01, Michael S. Tsirkin wrote: > > >> It would be educational to try to enable ACPI core but disable all > > >> optional features. > > > > A lot of them are select'ed so it's not easy. > > > > > Trying with ACPI_REDUCED_HARDWARE_ONLY would also be educational. > > > > That's what the NEMU guys experimented with. It's not supported by our > > DSDT since it uses ACPI GPE, > > Well there are two GPE blocks in FADT. We could just switch to > these if necesary I think. if it's simplistic vm we could build dedicated DSDT (or whole set of tables) for it and use reduced profile like arm-virt machine does (just a newer version of FADT with need flags set). That probably would cut acpi cost on QEMU side. > > and the reduction in code size is small > > (about 15000 lines of code in ACPICA, perhaps 100k if you're lucky?). > > > > Paolo > > Well ACPI is 150k loc I think, right? > > linux]$ wc -l `find drivers/acpi/ -name '*.c' `|tail -1 > 145926 total > > So 100k wouldn't be too shabby. >