From patchwork Fri Oct 9 12:18:19 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Vitaly Kuznetsov X-Patchwork-Id: 1379146 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=nongnu.org (client-ip=209.51.188.17; helo=lists.gnu.org; envelope-from=qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org; receiver=) Authentication-Results: ozlabs.org; dmarc=fail (p=none dis=none) header.from=redhat.com Authentication-Results: ozlabs.org; dkim=fail reason="signature verification failed" (1024-bit key; unprotected) header.d=redhat.com header.i=@redhat.com header.a=rsa-sha256 header.s=mimecast20190719 header.b=VJiML/iB; dkim-atps=neutral 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 ozlabs.org (Postfix) with ESMTPS id 4C76kx6TsJz9sSn for ; Fri, 9 Oct 2020 23:26:49 +1100 (AEDT) Received: from localhost ([::1]:55240 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1kQrTu-0006o6-EG for incoming@patchwork.ozlabs.org; Fri, 09 Oct 2020 08:26:47 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:38278) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1kQrMJ-00085r-0p for qemu-devel@nongnu.org; Fri, 09 Oct 2020 08:18:51 -0400 Received: from us-smtp-delivery-124.mimecast.com ([63.128.21.124]:52817) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_CBC_SHA1:256) (Exim 4.90_1) (envelope-from ) id 1kQrMG-0007tB-QZ for qemu-devel@nongnu.org; Fri, 09 Oct 2020 08:18:50 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1602245927; 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=r2dy6VyzVqM/+uH8zQ00z+zsZiVOxWZqCNJ5Gg+oQlE=; b=VJiML/iBHouW618AeaWD7BTuHAcQsqSJPhwX5vUIUV+exlbYzkE7NA7pynEcKtPAaKsQ/0 4YXkFLqe6bfzUw5q34UrijfEtF9drOKip/WiBTqpxPzhxwASJxTUoCZTdUmDlVNUJWjJvJ Doo9LQmuaBlvfINCIXELT/8aJKuluE0= 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-418-HJlqJZiZNySdFl2VOS-WFQ-1; Fri, 09 Oct 2020 08:18:46 -0400 X-MC-Unique: HJlqJZiZNySdFl2VOS-WFQ-1 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 mimecast-mx01.redhat.com (Postfix) with ESMTPS id 24204805F0B for ; Fri, 9 Oct 2020 12:18:45 +0000 (UTC) Received: from vitty.brq.redhat.com (unknown [10.40.195.207]) by smtp.corp.redhat.com (Postfix) with ESMTP id 3EDE95C1BB; Fri, 9 Oct 2020 12:18:43 +0000 (UTC) From: Vitaly Kuznetsov To: qemu-devel@nongnu.org Subject: [PATCH RFC v3 00/23] i386: KVM: expand Hyper-V features early Date: Fri, 9 Oct 2020 14:18:19 +0200 Message-Id: <20201009121842.1938010-1-vkuznets@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.16 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=63.128.21.124; envelope-from=vkuznets@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-detected-operating-system: by eggs.gnu.org: First seen = 2020/10/09 02:34:40 X-ACL-Warn: Detected OS = Linux 2.2.x-3.x [generic] [fuzzy] 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_H5=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 , Eduardo Habkost , "Dr. David Alan Gilbert" Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: "Qemu-devel" Another week another RFC. KVM patches are still in flight, so RFC again. Changes since RFCv2: - Rebase. - Split "i386: drop FEAT_HYPERV feature leaves" into several patches and re-shuffle patches to minimize the code churn and make it easier to review. [Eduardo] - Added "i386: provide simple 'hyperv=on' option to x86 machine types" on top. This pairs with https://lore.kernel.org/kvm/20200929150944.1235688-1-vkuznets@redhat.com/T/#t 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). In addition, add a simple 'hyperv=on' option to x86 machine types which enables (and requires from KVM) all currently supported Hyper-V enlightenments. Unlike 'hv_passthrough' mode, this is going to be migratable. Vitaly Kuznetsov (23): WIP: update linux/headers i386: fill in FEAT_HYPERV_EDX from edx instead of eax i386: drop x86_cpu_get_supported_feature_word() forward declaration i386: move hyperv_vendor_id initialization to x86_cpu_realizefn() i386: move hyperv_interface_id initialization to x86_cpu_realizefn() i386: move hyperv_version_id initialization to x86_cpu_realizefn() i386: move hyperv_limits initialization to x86_cpu_realizefn() i386: keep hyperv_vendor string up-to-date i386: invert hyperv_spinlock_attempts setting logic with hv_passthrough i386: always fill Hyper-V CPUID feature leaves from X86CPU data i386: stop using env->features[] for filling Hyper-V CPUIDs i386: introduce hyperv_feature_supported() i386: introduce hv_cpuid_get_host() i386: drop FEAT_HYPERV feature leaves i386: introduce hv_cpuid_cache i386: split hyperv_handle_properties() into hyperv_expand_features()/hyperv_fill_cpuids() i386: move eVMCS enablement to hyperv_init_vcpu() i386: switch hyperv_expand_features() to using error_setg() i386: adjust the expected KVM_GET_SUPPORTED_HV_CPUID array size i386: prefer system KVM_GET_SUPPORTED_HV_CPUID ioctl over vCPU's one i386: use global kvm_state in hyperv_enabled() check i386: expand Hyper-V features during CPU feature expansion time i386: provide simple 'hyperv=on' option to x86 machine types docs/hyperv.txt | 8 + hw/i386/x86.c | 30 ++ include/hw/i386/x86.h | 7 + linux-headers/asm-x86/kvm.h | 20 ++ linux-headers/linux/kvm.h | 27 +- target/i386/cpu.c | 149 ++++------ target/i386/cpu.h | 12 +- target/i386/kvm-stub.c | 5 + target/i386/kvm.c | 526 ++++++++++++++++++++---------------- target/i386/kvm_i386.h | 1 + 10 files changed, 457 insertions(+), 328 deletions(-)