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=-3.5 required=3.0 tests=BAYES_00,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 0B07AC07E95 for ; Wed, 7 Jul 2021 14:02:09 +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 AB85B61C92 for ; Wed, 7 Jul 2021 14:02:08 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org AB85B61C92 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]:53186 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1m187r-0005ii-UB for qemu-devel@archiver.kernel.org; Wed, 07 Jul 2021 10:02:07 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:48940) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1m186B-00039X-4h for qemu-devel@nongnu.org; Wed, 07 Jul 2021 10:00:23 -0400 Received: from us-smtp-delivery-124.mimecast.com ([216.205.24.124]:32020) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1m1868-0007ak-NG for qemu-devel@nongnu.org; Wed, 07 Jul 2021 10:00:22 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1625666418; 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: in-reply-to:in-reply-to:references:references; bh=zEtz2ybv6tyNSdIo46+izCll5hiP571eoSA8Ty2MDcY=; b=K9jIBkZVXWdSIC1Hc1Uap6FQfh+VWoYwAnnvfZf5uxoIUQjsM3g6x6Gy1og37t6LiHPxN8 hxrLvwzNu8a+UBlbnc1EAKQSPl4d2T86NVXKimLNKYsx/JUNUAgG10C77p3aTPj3TFvNjb XpquOv8uu814VDMxTq8W33QWIPvoUQc= Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-199-ypfTNVUuMimua7NhH8G6pw-1; Wed, 07 Jul 2021 10:00:17 -0400 X-MC-Unique: ypfTNVUuMimua7NhH8G6pw-1 Received: from smtp.corp.redhat.com (int-mx08.intmail.prod.int.phx2.redhat.com [10.5.11.23]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 389CA362FD; Wed, 7 Jul 2021 14:00:16 +0000 (UTC) Received: from localhost (ovpn-113-79.rdu2.redhat.com [10.10.113.79]) by smtp.corp.redhat.com (Postfix) with ESMTP id 2C2D319C45; Wed, 7 Jul 2021 14:00:12 +0000 (UTC) Date: Wed, 7 Jul 2021 10:00:11 -0400 From: Eduardo Habkost To: Vitaly Kuznetsov Subject: Re: [PATCH v8 0/9] i386: KVM: expand Hyper-V features early Message-ID: <20210707140011.rnk3ixqrvnftcy5p@habkost.net> References: <20210608120817.1325125-1-vkuznets@redhat.com> MIME-Version: 1.0 In-Reply-To: <20210608120817.1325125-1-vkuznets@redhat.com> X-Scanned-By: MIMEDefang 2.84 on 10.5.11.23 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=ehabkost@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Received-SPF: pass client-ip=216.205.24.124; envelope-from=ehabkost@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -41 X-Spam_score: -4.2 X-Spam_bar: ---- X-Spam_report: (-4.2 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-1.439, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_LOW=-0.7, RCVD_IN_MSPIKE_H4=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action 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: "Michael S. Tsirkin" , Marcelo Tosatti , qemu-devel@nongnu.org, Igor Mammedov , Paolo Bonzini Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" On Tue, Jun 08, 2021 at 02:08:08PM +0200, Vitaly Kuznetsov wrote: > Changes since v7: > - Make eVMCS version check future proof [Eduardo] > - Collect R-b tags [Eduardo] > - Drop 'if (!strcmp(arch, "i386") || !strcmp(arch, "x86_64"))' check from qtest > [Eduardo] > - s/priviliges/privileges/ [Eric] > > The last two functional patches are inspired by 'Fine-grained access check > to Hyper-V hypercalls and MSRs' work for KVM: > https://lore.kernel.org/kvm/20210521095204.2161214-1-vkuznets@redhat.com/ > > Original description: > > Upper layer tools like libvirt want to figure out which Hyper-V features are > supported by the underlying stack (QEMU/KVM) but currently they are unable to > do so. We have a nice 'hv_passthrough' CPU flag supported by QEMU but it has > no effect on e.g. QMP's > > query-cpu-model-expansion type=full model={"name":"host","props":{"hv-passthrough":true}} > > command as we parse Hyper-V features after creating KVM vCPUs and not at > feature expansion time. To support the use-case we first need to make > KVM_GET_SUPPORTED_HV_CPUID ioctl a system-wide ioctl as the existing > vCPU version can't be used that early. This is what KVM part does. With > that done, we can make early Hyper-V feature expansion (this series). I'm finally queueing this (please ignore my reply to v7). Thanks, and sorry for the delay! -- Eduardo