From nobody Fri Dec 19 22:02:04 2025 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 5CC10C433EF for ; Mon, 13 Jun 2022 18:01:24 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S244372AbiFMSBB (ORCPT ); Mon, 13 Jun 2022 14:01:01 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:33468 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S243563AbiFMR4l (ORCPT ); Mon, 13 Jun 2022 13:56:41 -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 ESMTP id 1C0F03DDC3 for ; Mon, 13 Jun 2022 06:40:34 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1655127633; 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=1atB4aLHp9k/0fb1IkZVw+pPj3AHQaOMlcAKUXDRjqQ=; b=g7TVAEKCgfgeI7jipcm/8pDHK3EIu3RVTTsqQQlVhNXqeqxdaEg8LqeruJW4h5f2JruxsB X4sMzWrCzYcBMw/mNg4Wrpu0TPETop/IDC4HjnXxVrL793zvOszn5cM0/hyh1noGKpTvmH kt+nK7rrTdaVyHjL8+T9h5QIG21Nseo= 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-459-wzePD1ZdOVGY3AJXw-c6AA-1; Mon, 13 Jun 2022 09:40:30 -0400 X-MC-Unique: wzePD1ZdOVGY3AJXw-c6AA-1 Received: from smtp.corp.redhat.com (int-mx09.intmail.prod.int.rdu2.redhat.com [10.11.54.9]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id 8C8F2101E9B6; Mon, 13 Jun 2022 13:40:29 +0000 (UTC) Received: from fedora.redhat.com (unknown [10.40.194.60]) by smtp.corp.redhat.com (Postfix) with ESMTP id 27334492CA2; Mon, 13 Jun 2022 13:40:27 +0000 (UTC) From: Vitaly Kuznetsov To: kvm@vger.kernel.org, Paolo Bonzini Cc: Sean Christopherson , Maxim Levitsky , Wanpeng Li , Jim Mattson , Michael Kelley , Siddharth Chandrasekaran , Yuan Yao , linux-hyperv@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v7 23/39] KVM: x86: Expose Hyper-V L2 TLB flush feature Date: Mon, 13 Jun 2022 15:39:06 +0200 Message-Id: <20220613133922.2875594-24-vkuznets@redhat.com> In-Reply-To: <20220613133922.2875594-1-vkuznets@redhat.com> References: <20220613133922.2875594-1-vkuznets@redhat.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Scanned-By: MIMEDefang 2.85 on 10.11.54.9 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 edb042413bb4..ca10de0cbbf2 100644 --- a/arch/x86/kvm/hyperv.c +++ b/arch/x86/kvm/hyperv.c @@ -2776,6 +2776,7 @@ 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; =20 break; --=20 2.35.3