From nobody Tue Nov 18 10:37:44 2025 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; dkim=fail; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=fail(p=none dis=none) header.from=redhat.com ARC-Seal: i=1; a=rsa-sha256; t=1610032937; cv=none; d=zohomail.com; s=zohoarc; b=H8fiM1goyz29odjc+Z+5XSb92zDjYDJ786O/kQVu8OfqGemtfPGc+qmoXPHkZGwr43b6iQEVZLlWTQp1ZT55z855NRg8uCXW1pc9f4t9qMiAbu4bb/EsSfhKL5hnXUsvePbmah35LSFYptGqkijCNuhSur9LyyXbIf90aeWRfFA= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1610032937; h=Content-Type:Content-Transfer-Encoding:Cc:Date:From:In-Reply-To:List-Subscribe:List-Post:List-Id:List-Archive:List-Help:List-Unsubscribe:MIME-Version:Message-ID:References:Sender:Subject:To; bh=9NU3i8B9LkIoL2CfvPNYWccdarbgzFm4TG0pt27rBs8=; b=P8nQifYTDlgOd5vdOCKYIP+PQYHUeGQHH+/a9Oib3Gjc5r0pMYh3nN8lzG17v+IFCtKVSk18V8rpE4qOcYxvW/M5bYmewT94ro4f60h2ivWERhYhJnXxyBxb813Ud2tn1lf+PTuy7u4paLvUjiYIQnRfdrP3Wi7nLLbx6PBwT8o= ARC-Authentication-Results: i=1; mx.zohomail.com; dkim=fail; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=fail header.from= (p=none dis=none) header.from= Return-Path: Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 1610032937137253.82436331985843; Thu, 7 Jan 2021 07:22:17 -0800 (PST) Received: from localhost ([::1]:59330 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1kxX7A-0000Kv-5J for importer@patchew.org; Thu, 07 Jan 2021 10:22:16 -0500 Received: from eggs.gnu.org ([2001:470:142:3::10]:39370) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1kxX06-000069-0s for qemu-devel@nongnu.org; Thu, 07 Jan 2021 10:14:59 -0500 Received: from us-smtp-delivery-124.mimecast.com ([216.205.24.124]:50665) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_CBC_SHA1:256) (Exim 4.90_1) (envelope-from ) id 1kxX03-0006Re-6z for qemu-devel@nongnu.org; Thu, 07 Jan 2021 10:14:57 -0500 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-525-SwrK_P18MdqfACj974lfrQ-1; Thu, 07 Jan 2021 10:14:53 -0500 Received: from smtp.corp.redhat.com (int-mx05.intmail.prod.int.phx2.redhat.com [10.5.11.15]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 12347107ACE3 for ; Thu, 7 Jan 2021 15:14:52 +0000 (UTC) Received: from vitty.brq.redhat.com (unknown [10.40.195.131]) by smtp.corp.redhat.com (Postfix) with ESMTP id 5C62E5B6AF; Thu, 7 Jan 2021 15:14:50 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1610032494; 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: in-reply-to:in-reply-to:references:references; bh=9NU3i8B9LkIoL2CfvPNYWccdarbgzFm4TG0pt27rBs8=; b=HkoNM183busWauisdAwQw7uBDokYLJwq3PD5q9ugheOl3G4liPTnbUbptswvqf/ciziOwz vcmwd9+rXMQy5+853B93oXHIJQ/gFv7dcxnvdCHxSzK/48FDXoxpTupn5ssSRgNE+2CxMh F2bd4/7ytlE9aWUNfFXwGdYDnRM+QvY= X-MC-Unique: SwrK_P18MdqfACj974lfrQ-1 From: Vitaly Kuznetsov To: qemu-devel@nongnu.org Subject: [PATCH v3 18/19] i386: provide simple 'hv-default=on' option Date: Thu, 7 Jan 2021 16:14:49 +0100 Message-Id: <20210107151449.541062-1-vkuznets@redhat.com> In-Reply-To: <20210107150640.539239-1-vkuznets@redhat.com> References: <20210107150640.539239-1-vkuznets@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.15 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 Content-Transfer-Encoding: quoted-printable Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=216.205.24.124; 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=-0.246, 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_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 , Igor Mammedov Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: fail (Header signature does not verify) Content-Type: text/plain; charset="utf-8" Enabling Hyper-V emulation for a Windows VM is a tiring experience as it requires listing all currently supported enlightenments ("hv-*" CPU features) explicitly. We do have 'hv-passthrough' mode enabling everything but it can't be used in production as it prevents migration. Introduce a simple 'hv-default=3Don' CPU flag enabling all currently suppor= ted Hyper-V enlightenments. Later, when new enlightenments get implemented, compat_props mechanism will be used to disable them for legacy machine type= s, this will keep 'hv-default=3Don' configurations migratable. Signed-off-by: Vitaly Kuznetsov --- docs/hyperv.txt | 16 +++++++++++++--- target/i386/cpu.c | 38 ++++++++++++++++++++++++++++++++++++++ target/i386/cpu.h | 5 +++++ 3 files changed, 56 insertions(+), 3 deletions(-) diff --git a/docs/hyperv.txt b/docs/hyperv.txt index 5df00da54fc4..a54c066cab09 100644 --- a/docs/hyperv.txt +++ b/docs/hyperv.txt @@ -17,10 +17,20 @@ compatible hypervisor and use Hyper-V specific features. =20 2. Setup =3D=3D=3D=3D=3D=3D=3D=3D=3D -No Hyper-V enlightenments are enabled by default by either KVM or QEMU. In -QEMU, individual enlightenments can be enabled through CPU flags, e.g: +All currently supported Hyper-V enlightenments can be enabled by specifying +'hv-default=3Don' CPU flag: =20 - qemu-system-x86_64 --enable-kvm --cpu host,hv_relaxed,hv_vpindex,hv_time= , ... + qemu-system-x86_64 --enable-kvm --cpu host,hv-default ... + +Alternatively, it is possible to do fine-grained enablement through CPU fl= ags, +e.g: + + qemu-system-x86_64 --enable-kvm --cpu host,hv-relaxed,hv-vpindex,hv-time= ... + +It is also possible to disable individual enlightenments from the default = list, +this can be used for debugging purposes: + + qemu-system-x86_64 --enable-kvm --cpu host,hv-default=3Don,hv-evmcs=3Dof= f ... =20 Sometimes there are dependencies between enlightenments, QEMU is supposed = to check that the supplied configuration is sane. diff --git a/target/i386/cpu.c b/target/i386/cpu.c index 48007a876e32..99338de00f78 100644 --- a/target/i386/cpu.c +++ b/target/i386/cpu.c @@ -4552,6 +4552,24 @@ static void x86_cpuid_set_tsc_freq(Object *obj, Visi= tor *v, const char *name, cpu->env.tsc_khz =3D cpu->env.user_tsc_khz =3D value / 1000; } =20 +static bool x86_hv_default_get(Object *obj, Error **errp) +{ + X86CPU *cpu =3D X86_CPU(obj); + + return cpu->hyperv_default; +} + +static void x86_hv_default_set(Object *obj, bool value, Error **errp) +{ + X86CPU *cpu =3D X86_CPU(obj); + + cpu->hyperv_default =3D value; + + if (value) { + cpu->hyperv_features |=3D cpu->hyperv_default_features; + } +} + /* Generic getter for "feature-words" and "filtered-features" properties */ static void x86_cpu_get_feature_words(Object *obj, Visitor *v, const char *name, void *opaque, @@ -6955,10 +6973,26 @@ static void x86_cpu_initfn(Object *obj) object_property_add_alias(obj, "pause_filter", obj, "pause-filter"); object_property_add_alias(obj, "sse4_1", obj, "sse4.1"); object_property_add_alias(obj, "sse4_2", obj, "sse4.2"); + object_property_add_alias(obj, "hv_default", obj, "hv-default"); =20 if (xcc->model) { x86_cpu_load_model(cpu, xcc->model); } + + /* Hyper-V features enabled with 'hv-default=3Don' */ + cpu->hyperv_default_features =3D BIT(HYPERV_FEAT_RELAXED) | + BIT(HYPERV_FEAT_VAPIC) | BIT(HYPERV_FEAT_TIME) | + BIT(HYPERV_FEAT_CRASH) | BIT(HYPERV_FEAT_RESET) | + BIT(HYPERV_FEAT_VPINDEX) | BIT(HYPERV_FEAT_RUNTIME) | + BIT(HYPERV_FEAT_SYNIC) | BIT(HYPERV_FEAT_STIMER) | + BIT(HYPERV_FEAT_FREQUENCIES) | BIT(HYPERV_FEAT_REENLIGHTENMENT) | + BIT(HYPERV_FEAT_TLBFLUSH) | BIT(HYPERV_FEAT_IPI) | + BIT(HYPERV_FEAT_STIMER_DIRECT); + + /* Enlightened VMCS is only available on Intel/VMX */ + if (kvm_hv_evmcs_available()) { + cpu->hyperv_default_features |=3D BIT(HYPERV_FEAT_EVMCS); + } } =20 static int64_t x86_cpu_get_arch_id(CPUState *cs) @@ -7285,6 +7319,10 @@ static void x86_cpu_common_class_init(ObjectClass *o= c, void *data) x86_cpu_get_crash_info_qom, NULL, NULL, NULL= ); #endif =20 + object_class_property_add_bool(oc, "hv-default", + x86_hv_default_get, + x86_hv_default_set); + for (w =3D 0; w < FEATURE_WORDS; w++) { int bitnr; for (bitnr =3D 0; bitnr < 64; bitnr++) { diff --git a/target/i386/cpu.h b/target/i386/cpu.h index 6220cb2cabb9..8a484becb6b9 100644 --- a/target/i386/cpu.h +++ b/target/i386/cpu.h @@ -1657,6 +1657,11 @@ struct X86CPU { bool hyperv_synic_kvm_only; uint64_t hyperv_features; bool hyperv_passthrough; + + /* 'hv-default' enablement */ + uint64_t hyperv_default_features; + bool hyperv_default; + OnOffAuto hyperv_no_nonarch_cs; uint32_t hyperv_vendor_id[3]; uint32_t hyperv_interface_id[4]; --=20 2.29.2