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=-0.6 required=3.0 tests=DKIM_INVALID,DKIM_SIGNED, 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 2DD48C2D0F4 for ; Wed, 8 Apr 2020 20:48:39 +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 E6BFC20771 for ; Wed, 8 Apr 2020 20:48:38 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (1024-bit key) header.d=yandex-team.ru header.i=@yandex-team.ru header.b="h/tbGv4M" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org E6BFC20771 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=yandex-team.ru Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Received: from localhost ([::1]:40438 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1jMHck-000831-2z for qemu-devel@archiver.kernel.org; Wed, 08 Apr 2020 16:48:38 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:41997) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1jMHc0-0007dw-5D for qemu-devel@nongnu.org; Wed, 08 Apr 2020 16:47:56 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1jMHbw-0003YQ-Cg for qemu-devel@nongnu.org; Wed, 08 Apr 2020 16:47:49 -0400 Received: from forwardcorp1p.mail.yandex.net ([77.88.29.217]:41018) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1jMHbv-0003Uu-JR for qemu-devel@nongnu.org; Wed, 08 Apr 2020 16:47:48 -0400 Received: from mxbackcorp1j.mail.yandex.net (mxbackcorp1j.mail.yandex.net [IPv6:2a02:6b8:0:1619::162]) by forwardcorp1p.mail.yandex.net (Yandex) with ESMTP id 71CEB2E158F; Wed, 8 Apr 2020 23:47:44 +0300 (MSK) Received: from vla1-81430ab5870b.qloud-c.yandex.net (vla1-81430ab5870b.qloud-c.yandex.net [2a02:6b8:c0d:35a1:0:640:8143:ab5]) by mxbackcorp1j.mail.yandex.net (mxbackcorp/Yandex) with ESMTP id 5J1CIixtZz-lhMmwwQx; Wed, 08 Apr 2020 23:47:44 +0300 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=yandex-team.ru; s=default; t=1586378864; bh=p8zs0OXbWCYkFsM3uJGn+I7Ln3YzK2mSg0sscPUkOL0=; h=In-Reply-To:Message-ID:Subject:To:From:References:Date:Cc; b=h/tbGv4Ma6hoKyzwAmD+TRdNAF0Fv7R+qVGGg9YlRRShjSvhZQ2fxB34xHfBm5O6X +p3LWZuhSDgV97ED+N2cqwdC5WeDcajeAdtGmWDVtWcoCbq6NMICDJKENweTkKRUFy ebpTqt/7ojvCL9kDbZ3KJTu1nq9FFVvc5h+Nvgh0= Authentication-Results: mxbackcorp1j.mail.yandex.net; dkim=pass header.i=@yandex-team.ru Received: from unknown (unknown [2a02:6b8:b080:8210::1:b]) by vla1-81430ab5870b.qloud-c.yandex.net (smtpcorp/Yandex) with ESMTPSA id jogaq5afqf-lhW4QIbw; Wed, 08 Apr 2020 23:47:43 +0300 (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits)) (Client certificate not present) Date: Wed, 8 Apr 2020 23:47:42 +0300 From: Roman Kagan To: Jon Doron Subject: Re: [PATCH v1 5/5] i386: Hyper-V VMBus ACPI DSDT entry Message-ID: <20200408204742.GA709224@rvkaganb> Mail-Followup-To: Roman Kagan , Jon Doron , "Maciej S. Szmigiero" , QEMU , Evgeny Yakovlev , ehabkost@redhat.com, Paolo Bonzini , Vitaly Kuznetsov , Liran Alon References: <76017793-735b-4bb5-0e69-ecded78af54d@maciej.szmigiero.name> <9b9c42d3-af9e-25e9-210e-c58ee5975941@maciej.szmigiero.name> <472544e7-498a-4e28-06e9-83c102d6436b@maciej.szmigiero.name> <20200406073246.GA7707@rvkaganb> <20200407185608.GA178651@rvkaganb> <8c278ea8-81c5-7458-8979-c319470440d7@maciej.szmigiero.name> <20200408041639.GA7606@jondnuc> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20200408041639.GA7606@jondnuc> X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] [fuzzy] X-Received-From: 77.88.29.217 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: "Maciej S. Szmigiero" , Evgeny Yakovlev , ehabkost@redhat.com, QEMU , Liran Alon , Paolo Bonzini , Vitaly Kuznetsov Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" On Wed, Apr 08, 2020 at 07:16:39AM +0300, Jon Doron wrote: > On 07/04/2020, Maciej S. Szmigiero wrote: > > On 07.04.2020 20:56, Roman Kagan wrote: > > > On Mon, Apr 06, 2020 at 11:20:39AM +0300, Jon Doron wrote: > > > > Well I want it to be merged in :-) > > > > > > Hmm I'm curious why, it has little to offer over virtio. > > > > > > Anyway the series you've posted seems to be based on a fairly old > > > version. > > > > > > The one in openvz repo is more recent. It's still in need for > > > improvement, too, but should be testable at least. > > Well I have implemented the hyperv synthetic kernel debugger interface, but > on Windows 10 it requires to have a working VMBus (it's not really using it, > but without a function vmbus that will answer to the initiate contact then > the kdnet will simply be stuck in a loop. I see, thanks, I've never heard of this before. > With the synthetic kernel debugger interface you can debug older OS (Win7 up > to latest Win10). The benefit is that its much faster than all other > interfaces. I guess you compare it to debugging via serial port. I wonder where the difference comes from? I thought the transport didn't require any significant throughput, and latency-wise the (emulated) serial port was just as good as any other. Am I missing something? Thanks, Roman. > In addition to that Michael Kelley from Microsoft has informed us that > Microsoft might be dropped the synthetic kernel debugger interface sometime > in the future, and it seems like the new mode is simply to use hvnet device > for the communication (which is again much faster). > > Cheers, > -- Jon. > > > > Isn't the one at > > https://src.openvz.org/projects/UP/repos/qemu/commits?until=refs%2Fheads%2Fvmbus > > the latest one? > > > > It seems to be last changed in October 2019 - is there a > > later one? > > > > > Thanks, > > > Roman. > > > > Thanks, > > Maciej