From patchwork Wed Sep 30 13:40:22 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Vitaly Kuznetsov X-Patchwork-Id: 1374375 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=TYeJ/Waz; 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 4C1d1q56ZRz9sSG for ; Wed, 30 Sep 2020 23:50:39 +1000 (AEST) Received: from localhost ([::1]:59704 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1kNcVB-0007HH-H4 for incoming@patchwork.ozlabs.org; Wed, 30 Sep 2020 09:50:37 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:37972) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1kNcMb-0006LT-5p for qemu-devel@nongnu.org; Wed, 30 Sep 2020 09:41:45 -0400 Received: from us-smtp-delivery-124.mimecast.com ([63.128.21.124]:30168) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_CBC_SHA1:256) (Exim 4.90_1) (envelope-from ) id 1kNcMT-0005di-BG for qemu-devel@nongnu.org; Wed, 30 Sep 2020 09:41:43 -0400 Dkim-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1601473296; 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=UpZKa7lGV2ZXbfTkflmLPamKfI5j5q26s1sGK0a6/WY=; b=TYeJ/WazOcH5ifth8D2MfiJVIJFAe4od5JA/Kmsqt9T/0bY2ueTL9t9P3DCKXycujJZOIu IFo2pHgs0AR/DDLEFMZaxPOd9+MhlVEpd2oAnyyA56qI/ubdCw5+jw8La/QbEm0cPAF3ZH TpcHet6CDLD67laW8yWHli+Zvq7ySbo= 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-272-jJiteyeqOvmiBNCv3sXPkg-1; Wed, 30 Sep 2020 09:41:34 -0400 X-MC-Unique: jJiteyeqOvmiBNCv3sXPkg-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 48AE0873157 for ; Wed, 30 Sep 2020 13:41:33 +0000 (UTC) Received: from vitty.brq.redhat.com (unknown [10.40.194.207]) by smtp.corp.redhat.com (Postfix) with ESMTP id C490760C05; Wed, 30 Sep 2020 13:41:31 +0000 (UTC) From: Vitaly Kuznetsov To: qemu-devel@nongnu.org Subject: [PATCH RFC v2 14/19] i386: move eVMCS enablement to hyperv_init_vcpu() Date: Wed, 30 Sep 2020 15:40:22 +0200 Message-Id: <20200930134027.1348021-15-vkuznets@redhat.com> In-Reply-To: <20200930134027.1348021-1-vkuznets@redhat.com> References: <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=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 = 2020/09/30 00:31:59 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+incoming=patchwork.ozlabs.org@nongnu.org Sender: "Qemu-devel" hyperv_expand_features() will be called before we create vCPU so evmcs enablement should go away. hyperv_init_vcpu() looks like the right place. Signed-off-by: Vitaly Kuznetsov --- target/i386/kvm.c | 60 +++++++++++++++++++++++++++++------------------ 1 file changed, 37 insertions(+), 23 deletions(-) diff --git a/target/i386/kvm.c b/target/i386/kvm.c index 0808355bfcfd..181e034da701 100644 --- a/target/i386/kvm.c +++ b/target/i386/kvm.c @@ -976,6 +976,7 @@ static struct kvm_cpuid2 *get_supported_hv_cpuid(CPUState *cs) { struct kvm_cpuid2 *cpuid; int max = 7; /* 0x40000000..0x40000005, 0x4000000A */ + int i; /* * When the buffer is too small, KVM_GET_SUPPORTED_HV_CPUID fails with @@ -985,6 +986,22 @@ static struct kvm_cpuid2 *get_supported_hv_cpuid(CPUState *cs) while ((cpuid = try_get_hv_cpuid(cs, max)) == NULL) { max++; } + + /* + * KVM_GET_SUPPORTED_HV_CPUID does not set EVMCS CPUID bit before + * KVM_CAP_HYPERV_ENLIGHTENED_VMCS is enabled but we want to get the + * information early, just check for the capability and set the bit + * manually. + */ + if (kvm_check_extension(cs->kvm_state, + KVM_CAP_HYPERV_ENLIGHTENED_VMCS) > 0) { + for (i = 0; i < cpuid->nent; i++) { + if (cpuid->entries[i].function == HV_CPUID_ENLIGHTMENT_INFO) { + cpuid->entries[i].eax |= HV_ENLIGHTENED_VMCS_RECOMMENDED; + } + } + } + return cpuid; } @@ -1214,24 +1231,6 @@ static int hyperv_expand_features(CPUState *cs) if (!hyperv_enabled(cpu)) return 0; - if (hyperv_feat_enabled(cpu, HYPERV_FEAT_EVMCS) || - cpu->hyperv_passthrough) { - uint16_t evmcs_version; - - r = kvm_vcpu_enable_cap(cs, KVM_CAP_HYPERV_ENLIGHTENED_VMCS, 0, - (uintptr_t)&evmcs_version); - - if (hyperv_feat_enabled(cpu, HYPERV_FEAT_EVMCS) && r) { - fprintf(stderr, "Hyper-V %s is not supported by kernel\n", - kvm_hyperv_properties[HYPERV_FEAT_EVMCS].desc); - return -ENOSYS; - } - - if (!r) { - cpu->hyperv_nested[0] = evmcs_version; - } - } - if (cpu->hyperv_passthrough) { cpu->hyperv_vendor_id[0] = hv_cpuid_get_host(cs, HV_CPUID_VENDOR_AND_MAX_FUNCTIONS, R_EBX); @@ -1468,6 +1467,21 @@ static int hyperv_init_vcpu(X86CPU *cpu) } } + if (hyperv_feat_enabled(cpu, HYPERV_FEAT_EVMCS)) { + uint16_t evmcs_version; + + ret = kvm_vcpu_enable_cap(cs, KVM_CAP_HYPERV_ENLIGHTENED_VMCS, 0, + (uintptr_t)&evmcs_version); + + if (ret < 0) { + fprintf(stderr, "Hyper-V %s is not supported by kernel\n", + kvm_hyperv_properties[HYPERV_FEAT_EVMCS].desc); + return ret; + } + + cpu->hyperv_nested[0] = evmcs_version; + } + return 0; } @@ -1532,6 +1546,11 @@ int kvm_arch_init_vcpu(CPUState *cs) } if (hyperv_enabled(cpu)) { + r = hyperv_init_vcpu(cpu); + if (r) { + return r; + } + cpuid_i = hyperv_fill_cpuids(cs, cpuid_data.entries); kvm_base = KVM_CPUID_SIGNATURE_NEXT; has_msr_hv_hypercall = true; @@ -1879,11 +1898,6 @@ int kvm_arch_init_vcpu(CPUState *cs) kvm_init_msrs(cpu); - r = hyperv_init_vcpu(cpu); - if (r) { - goto fail; - } - return 0; fail: