From patchwork Fri Sep 4 14:54:09 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Vitaly Kuznetsov X-Patchwork-Id: 11757669 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 C1566138E for ; Fri, 4 Sep 2020 14:57:41 +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 9F18520722 for ; Fri, 4 Sep 2020 14:57:41 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 9F18520722 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]:44380 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1kED9o-0004kg-QS for patchwork-qemu-devel@patchwork.kernel.org; Fri, 04 Sep 2020 10:57:40 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:41106) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1kED7x-0000Lj-VF for qemu-devel@nongnu.org; Fri, 04 Sep 2020 10:55:45 -0400 Received: from us-smtp-2.mimecast.com ([205.139.110.61]:47366 helo=us-smtp-delivery-1.mimecast.com) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_CBC_SHA1:256) (Exim 4.90_1) (envelope-from ) id 1kED7v-0007Ck-Lt for qemu-devel@nongnu.org; Fri, 04 Sep 2020 10:55:45 -0400 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-166-lr_HHQjuNdin4uU3t31ekg-1; Fri, 04 Sep 2020 10:54:34 -0400 X-MC-Unique: lr_HHQjuNdin4uU3t31ekg-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 1F03018BA28C for ; Fri, 4 Sep 2020 14:54:34 +0000 (UTC) Received: from vitty.brq.redhat.com (unknown [10.40.194.104]) by smtp.corp.redhat.com (Postfix) with ESMTP id DC6D47E416; Fri, 4 Sep 2020 14:54:32 +0000 (UTC) From: Vitaly Kuznetsov To: qemu-devel@nongnu.org Subject: [PATCH RFC 00/22] i386: KVM: expand Hyper-V features early Date: Fri, 4 Sep 2020 16:54:09 +0200 Message-Id: <20200904145431.196885-1-vkuznets@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.11 X-Mimecast-Spam-Score: 0.001 X-Mimecast-Originator: redhat.com Received-SPF: pass client-ip=205.139.110.61; envelope-from=vkuznets@redhat.com; helo=us-smtp-delivery-1.mimecast.com X-detected-operating-system: by eggs.gnu.org: First seen = 2020/09/04 01:57:11 X-ACL-Warn: Detected OS = Linux 2.2.x-3.x [generic] [fuzzy] X-Spam_score_int: -18 X-Spam_score: -1.9 X-Spam_bar: - X-Spam_report: (-1.9 / 5.0 requ) BAYES_00=-1.9, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H3=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" This pairs with https://lore.kernel.org/kvm/20200807083946.377654-1-vkuznets@redhat.com/ and as KVM part is not yet 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 (22): WIP: update linux/headers 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: fill in FEAT_HYPERV_EDX from edx instead of eax i386: invert hyperv_spinlock_attempts setting logic with hv_passthrough i386: add reserved FEAT_HYPERV_ECX CPUID leaf i386: add reserved FEAT_HV_RECOMM_ECX/FEAT_HV_RECOMM_EDX CPUID leaves i386: add reserved FEAT_HV_NESTED_EBX/ECX/EDX CPUID leaves i386: always fill Hyper-V CPUID feature leaves from X86CPU data 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: make hyperv_expand_features() return void 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: prepare hyperv_expand_features() to be called at CPU feature expansion time i386: use global kvm_state in hyperv_enabled() check i386: record if Hyper-V features were already expanded i386: expand Hyper-V features early include/standard-headers/drm/drm_fourcc.h | 140 +++++++ include/standard-headers/linux/ethtool.h | 87 +++++ .../linux/input-event-codes.h | 3 +- linux-headers/asm-generic/unistd.h | 6 +- linux-headers/asm-mips/unistd_n32.h | 1 + linux-headers/asm-mips/unistd_n64.h | 1 + linux-headers/asm-mips/unistd_o32.h | 1 + linux-headers/asm-powerpc/kvm.h | 5 + linux-headers/asm-powerpc/mman.h | 2 +- linux-headers/asm-powerpc/unistd_32.h | 1 + linux-headers/asm-powerpc/unistd_64.h | 1 + linux-headers/asm-s390/kvm.h | 7 +- linux-headers/asm-s390/unistd_32.h | 1 + linux-headers/asm-s390/unistd_64.h | 1 + linux-headers/asm-x86/unistd_32.h | 1 + linux-headers/asm-x86/unistd_64.h | 1 + linux-headers/asm-x86/unistd_x32.h | 1 + linux-headers/linux/kvm.h | 7 +- linux-headers/linux/vfio.h | 2 +- target/i386/cpu.c | 78 +++- target/i386/cpu.h | 13 +- target/i386/kvm.c | 347 ++++++++++++------ target/i386/kvm_i386.h | 7 + 23 files changed, 579 insertions(+), 135 deletions(-)