From patchwork Tue Jun 8 12:08:08 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Vitaly Kuznetsov X-Patchwork-Id: 12306645 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=-8.6 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS autolearn=ham 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 9D419C47082 for ; Tue, 8 Jun 2021 12:13:50 +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 50EB66124C for ; Tue, 8 Jun 2021 12:13:49 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 50EB66124C 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]:40342 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1lqac8-0004qP-FN for qemu-devel@archiver.kernel.org; Tue, 08 Jun 2021 08:13:48 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:55188) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1lqaX3-0008Bf-PI for qemu-devel@nongnu.org; Tue, 08 Jun 2021 08:08:33 -0400 Received: from us-smtp-delivery-124.mimecast.com ([170.10.133.124]:46485) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1lqaWz-0001gI-Pt for qemu-devel@nongnu.org; Tue, 08 Jun 2021 08:08:33 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1623154109; 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; bh=Hb8QAjkh5o1RzMcGP6j5yB05IFwfE+1/S3tA2ZylhPw=; b=UDZaO8ApalkKauA+UYc/MWU1wa+exL5o2XInt19gby2iyxBiCuDHOHrZK8MEc9aBRPUQy9 j/hpHz8nqqEyq2BzMzgMzX/NBLN9rxojcYMxVo5DbJxXiuMWn2lzM7w14TuG7YaxY0FNiH wFDuYkBx6nXxA3YmI98ZTNDm/Pj0It0= 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-282-0H7iZIzaPG2sbjljU6o_BA-1; Tue, 08 Jun 2021 08:08:24 -0400 X-MC-Unique: 0H7iZIzaPG2sbjljU6o_BA-1 Received: from smtp.corp.redhat.com (int-mx01.intmail.prod.int.phx2.redhat.com [10.5.11.11]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id D3D00180FD70; Tue, 8 Jun 2021 12:08:23 +0000 (UTC) Received: from vitty.brq.redhat.com (unknown [10.40.194.97]) by smtp.corp.redhat.com (Postfix) with ESMTP id AFEC018B4B; Tue, 8 Jun 2021 12:08:18 +0000 (UTC) From: Vitaly Kuznetsov To: qemu-devel@nongnu.org, Eduardo Habkost Subject: [PATCH v8 0/9] i386: KVM: expand Hyper-V features early Date: Tue, 8 Jun 2021 14:08:08 +0200 Message-Id: <20210608120817.1325125-1-vkuznets@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.11 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=vkuznets@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Received-SPF: pass client-ip=170.10.133.124; envelope-from=vkuznets@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -29 X-Spam_score: -3.0 X-Spam_bar: --- X-Spam_report: (-3.0 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.197, 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: Paolo Bonzini , Marcelo Tosatti , "Michael S. Tsirkin" , Igor Mammedov Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" 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). Vitaly Kuznetsov (9): i386: avoid hardcoding '12' as 'hyperv_vendor_id' length i386: clarify 'hv-passthrough' behavior i386: hardcode supported eVMCS version to '1' i386: make hyperv_expand_features() return bool i386: expand Hyper-V features during CPU feature expansion time i386: kill off hv_cpuid_check_and_set() i386: HV_HYPERCALL_AVAILABLE privilege bit is always needed i386: Hyper-V SynIC requires POST_MESSAGES/SIGNAL_EVENTS privileges qtest/hyperv: Introduce a simple hyper-v test MAINTAINERS | 1 + docs/hyperv.txt | 9 +- target/i386/cpu.c | 13 +- target/i386/kvm/hyperv-proto.h | 6 + target/i386/kvm/kvm-stub.c | 5 + target/i386/kvm/kvm.c | 189 +++++++++++++++------------- target/i386/kvm/kvm_i386.h | 1 + tests/qtest/hyperv-test.c | 221 +++++++++++++++++++++++++++++++++ tests/qtest/meson.build | 3 +- 9 files changed, 357 insertions(+), 91 deletions(-) create mode 100644 tests/qtest/hyperv-test.c