From patchwork Wed Sep 30 13:40:08 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Vitaly Kuznetsov X-Patchwork-Id: 11809139 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id B8D94618 for ; Wed, 30 Sep 2020 13:43:24 +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 82157206B7 for ; Wed, 30 Sep 2020 13:43:24 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="VWKu34v1" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 82157206B7 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+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Received: from localhost ([::1]:39880 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1kNcOB-0007Qu-FX for patchwork-qemu-devel@patchwork.kernel.org; Wed, 30 Sep 2020 09:43:23 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:37352) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1kNcLU-0005eM-Qg for qemu-devel@nongnu.org; Wed, 30 Sep 2020 09:40:38 -0400 Received: from us-smtp-delivery-124.mimecast.com ([216.205.24.124]:58258) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_CBC_SHA1:256) (Exim 4.90_1) (envelope-from ) id 1kNcLR-0005Wy-Kq for qemu-devel@nongnu.org; Wed, 30 Sep 2020 09:40:36 -0400 Dkim-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1601473232; 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=7b9/7kKgzXwO6Jy62Yqx3GOG8AJCeQNcvRA3j+i46u4=; b=VWKu34v1XzPj803RQaER6pQb8Bv/2LO1745fP+DbkLOLXBDqmZUgqPjtEFuqaoZ/HdxSvp /JcGWeSwtBSZXsz6qp1lyFg1RhqHXp+8FHjr4TYHWI8tbeCvIuly4mLn9AGKx21GIt1pKb cIVBv65DNW1F3Hb8WyuoD6mOzTEHzHs= 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-533-FSkGhxQVMMa5zgt2c9-YBA-1; Wed, 30 Sep 2020 09:40:30 -0400 X-MC-Unique: FSkGhxQVMMa5zgt2c9-YBA-1 Received: from smtp.corp.redhat.com (int-mx02.intmail.prod.int.phx2.redhat.com [10.5.11.12]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 7E39EADF00 for ; Wed, 30 Sep 2020 13:40:29 +0000 (UTC) Received: from vitty.brq.redhat.com (unknown [10.40.194.207]) by smtp.corp.redhat.com (Postfix) with ESMTP id 4AE5A619B5; Wed, 30 Sep 2020 13:40:28 +0000 (UTC) From: Vitaly Kuznetsov To: qemu-devel@nongnu.org Subject: [PATCH RFC v2 00/19] i386: KVM: expand Hyper-V features early Date: Wed, 30 Sep 2020 15:40:08 +0200 Message-Id: <20200930134027.1348021-1-vkuznets@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.12 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=216.205.24.124; envelope-from=vkuznets@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-detected-operating-system: by eggs.gnu.org: First seen = 2020/09/30 00:26:33 X-ACL-Warn: Detected OS = Linux 2.2.x-3.x [generic] [fuzzy] X-Spam_score_int: -25 X-Spam_score: -2.6 X-Spam_bar: -- X-Spam_report: (-2.6 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.469, 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 Errors-To: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: "Qemu-devel" Changes since RFCv1: - Took a slightly differenet approach, instead of adding all missing Hyper-V feature leaves to feature_word_info[] remove the existing ones from there. The logic for handling them is very different and some of these leaves are not actually 'feature leaves'. See "i386: drop FEAT_HYPERV feature leaves" for details. - x86_cpu_hyperv_realize introduced [Eduardo]. - Rebased to the latest master. This pairs with https://lore.kernel.org/kvm/20200929150944.1235688-1-vkuznets@redhat.com/T/#t and as KVM part is not yet fully accepted, sending this as RFC. 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 (19): 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: introduce hv_cpuid_cache i386: drop FEAT_HYPERV feature leaves 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 linux-headers/asm-x86/kvm.h | 20 ++ linux-headers/linux/kvm.h | 27 +- target/i386/cpu.c | 135 +++------ target/i386/cpu.h | 12 +- target/i386/kvm-stub.c | 5 + target/i386/kvm.c | 526 ++++++++++++++++++++---------------- target/i386/kvm_i386.h | 1 + 7 files changed, 398 insertions(+), 328 deletions(-)