From nobody Thu Apr 2 19:45:32 2026 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 41028ECAAD8 for ; Wed, 21 Sep 2022 15:28:12 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231365AbiIUP2J (ORCPT ); Wed, 21 Sep 2022 11:28:09 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:33112 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231272AbiIUP1S (ORCPT ); Wed, 21 Sep 2022 11:27:18 -0400 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.129.124]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 1C5D198C8F for ; Wed, 21 Sep 2022 08:25:55 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1663773944; 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=G8g6nkZR4NZyZXQonCEiVMud1aiPVM+hfQjCyGlaQk0=; b=XLR/xS0NlhoasVBCO2YlzmQDa1DnLE6EcmakaMoXqRKr/tg7hRku9XurKUquOSlykeiQCF 3+NLmloxT4mfpQs/GQiOP5++JlwYifhA3+GDtw6rupyU2Dd71Y381MMRbWSZr3S4u3pRH0 kSxovxUvgsTSB/eLxAZxwoOTdwheGks= Received: from mimecast-mx02.redhat.com (mimecast-mx02.redhat.com [66.187.233.88]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-57-rjeSpSJcOaG34hBRSwI9CA-1; Wed, 21 Sep 2022 11:25:39 -0400 X-MC-Unique: rjeSpSJcOaG34hBRSwI9CA-1 Received: from smtp.corp.redhat.com (int-mx06.intmail.prod.int.rdu2.redhat.com [10.11.54.6]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id 43599858F17; Wed, 21 Sep 2022 15:25:38 +0000 (UTC) Received: from fedora.redhat.com (unknown [10.40.194.159]) by smtp.corp.redhat.com (Postfix) with ESMTP id D4B082166B26; Wed, 21 Sep 2022 15:25:35 +0000 (UTC) From: Vitaly Kuznetsov To: kvm@vger.kernel.org, Paolo Bonzini Cc: Sean Christopherson , Wanpeng Li , Jim Mattson , Michael Kelley , Siddharth Chandrasekaran , Yuan Yao , Maxim Levitsky , linux-hyperv@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v10 22/39] KVM: x86: Expose Hyper-V L2 TLB flush feature Date: Wed, 21 Sep 2022 17:24:19 +0200 Message-Id: <20220921152436.3673454-23-vkuznets@redhat.com> In-Reply-To: <20220921152436.3673454-1-vkuznets@redhat.com> References: <20220921152436.3673454-1-vkuznets@redhat.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Scanned-By: MIMEDefang 3.1 on 10.11.54.6 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" With both nSVM and nVMX implementations in place, KVM can now expose Hyper-V L2 TLB flush feature to userspace. Reviewed-by: Maxim Levitsky Signed-off-by: Vitaly Kuznetsov --- arch/x86/kvm/hyperv.c | 1 + 1 file changed, 1 insertion(+) diff --git a/arch/x86/kvm/hyperv.c b/arch/x86/kvm/hyperv.c index 8ae32ec87efb..1eb2e3c8b392 100644 --- a/arch/x86/kvm/hyperv.c +++ b/arch/x86/kvm/hyperv.c @@ -2764,6 +2764,7 @@ int kvm_get_hv_cpuid(struct kvm_vcpu *vcpu, struct kv= m_cpuid2 *cpuid, =20 case HYPERV_CPUID_NESTED_FEATURES: ent->eax =3D evmcs_ver; + ent->eax |=3D HV_X64_NESTED_DIRECT_FLUSH; ent->eax |=3D HV_X64_NESTED_MSR_BITMAP; ent->ebx |=3D HV_X64_NESTED_EVMCS1_PERF_GLOBAL_CTRL; break; --=20 2.37.3