From patchwork Wed Feb 10 16:40:21 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Vitaly Kuznetsov X-Patchwork-Id: 12081231 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=-16.3 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER,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 23DE3C433E0 for ; Wed, 10 Feb 2021 16:53:56 +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 6E96964DF6 for ; Wed, 10 Feb 2021 16:53:55 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 6E96964DF6 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]:39988 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1l9skT-0003Ba-1d for qemu-devel@archiver.kernel.org; Wed, 10 Feb 2021 11:53:53 -0500 Received: from eggs.gnu.org ([2001:470:142:3::10]:42258) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1l9sYB-00078i-1q for qemu-devel@nongnu.org; Wed, 10 Feb 2021 11:41:11 -0500 Received: from us-smtp-delivery-124.mimecast.com ([216.205.24.124]:42378) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_CBC_SHA1:256) (Exim 4.90_1) (envelope-from ) id 1l9sY2-0008Pu-LR for qemu-devel@nongnu.org; Wed, 10 Feb 2021 11:41:10 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1612975262; 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=roL0mRNB/R5YIewqpjZmy8mF5yT80a4hlFQadesvpIA=; b=UNipAC/Q6/AFs+77YPj+urYRun/p7tOd6bbmMWDVuSfnEO0zpKClH9RwSL7j70sMlbcnGt J0dKBGHeE78wXZNOmwxVZ/jkve9NmDWDo2ROZ2uPf7QGf7QwdTN7Xn9JvM71Mo975X5QrU mkxOrCL7ULK9EL1yA+1ykr9DwekdXHQ= 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-557-BrO7pBqLNomXjLIsxQ1HYQ-1; Wed, 10 Feb 2021 11:41:00 -0500 X-MC-Unique: BrO7pBqLNomXjLIsxQ1HYQ-1 Received: from smtp.corp.redhat.com (int-mx04.intmail.prod.int.phx2.redhat.com [10.5.11.14]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 761B3107ACE8 for ; Wed, 10 Feb 2021 16:40:59 +0000 (UTC) Received: from vitty.brq.redhat.com (unknown [10.40.195.108]) by smtp.corp.redhat.com (Postfix) with ESMTP id C7C835D9D0; Wed, 10 Feb 2021 16:40:57 +0000 (UTC) From: Vitaly Kuznetsov To: qemu-devel@nongnu.org, Eduardo Habkost Subject: [PATCH v4 09/21] i386: split hyperv_handle_properties() into hyperv_expand_features()/hyperv_fill_cpuids() Date: Wed, 10 Feb 2021 17:40:21 +0100 Message-Id: <20210210164033.607612-10-vkuznets@redhat.com> In-Reply-To: <20210210164033.607612-1-vkuznets@redhat.com> References: <20210210164033.607612-1-vkuznets@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.14 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-Spam_score_int: -33 X-Spam_score: -3.4 X-Spam_bar: --- X-Spam_report: (-3.4 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.568, 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 , Igor Mammedov Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" The intention is to call hyperv_expand_features() early, before vCPUs are created and use the acquired data later when we set guest visible CPUID data. Signed-off-by: Vitaly Kuznetsov --- target/i386/kvm/kvm.c | 34 ++++++++++++++++++++++++---------- 1 file changed, 24 insertions(+), 10 deletions(-) diff --git a/target/i386/kvm/kvm.c b/target/i386/kvm/kvm.c index bcc5709ec467..893c9c515fbb 100644 --- a/target/i386/kvm/kvm.c +++ b/target/i386/kvm/kvm.c @@ -1185,16 +1185,15 @@ static uint32_t hv_build_cpuid_leaf(CPUState *cs, uint32_t func, int reg) } /* - * Fill in Hyper-V CPUIDs. Returns the number of entries filled in cpuid_ent in - * case of success, errno < 0 in case of failure and 0 when no Hyper-V - * extentions are enabled. + * Expand Hyper-V CPU features. In partucular, check that all the requested + * features are supported by the host and the sanity of the configuration + * (that all the required dependencies are included). Also, this takes care + * of 'hv_passthrough' mode and fills the environment with all supported + * Hyper-V features. */ -static int hyperv_handle_properties(CPUState *cs, - struct kvm_cpuid_entry2 *cpuid_ent) +static int hyperv_expand_features(CPUState *cs) { X86CPU *cpu = X86_CPU(cs); - struct kvm_cpuid_entry2 *c; - uint32_t cpuid_i = 0; int r; if (!hyperv_enabled(cpu)) @@ -1292,6 +1291,19 @@ static int hyperv_handle_properties(CPUState *cs, return -ENOSYS; } + return 0; +} + +/* + * Fill in Hyper-V CPUIDs. Returns the number of entries filled in cpuid_ent. + */ +static int hyperv_fill_cpuids(CPUState *cs, + struct kvm_cpuid_entry2 *cpuid_ent) +{ + X86CPU *cpu = X86_CPU(cs); + struct kvm_cpuid_entry2 *c; + uint32_t cpuid_i = 0; + c = &cpuid_ent[cpuid_i++]; c->function = HV_CPUID_VENDOR_AND_MAX_FUNCTIONS; c->eax = hyperv_feat_enabled(cpu, HYPERV_FEAT_EVMCS) ? @@ -1499,11 +1511,13 @@ int kvm_arch_init_vcpu(CPUState *cs) env->apic_bus_freq = KVM_APIC_BUS_FREQUENCY; /* Paravirtualization CPUIDs */ - r = hyperv_handle_properties(cs, cpuid_data.entries); + r = hyperv_expand_features(cs); if (r < 0) { return r; - } else if (r > 0) { - cpuid_i = r; + } + + if (hyperv_enabled(cpu)) { + cpuid_i = hyperv_fill_cpuids(cs, cpuid_data.entries); kvm_base = KVM_CPUID_SIGNATURE_NEXT; has_msr_hv_hypercall = true; }