From patchwork Thu Apr 7 15:56:33 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Vitaly Kuznetsov X-Patchwork-Id: 12805459 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 B0B0EC43217 for ; Thu, 7 Apr 2022 15:57:50 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1345407AbiDGP7t (ORCPT ); Thu, 7 Apr 2022 11:59:49 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:47342 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1345400AbiDGP7m (ORCPT ); Thu, 7 Apr 2022 11:59:42 -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 78698D5E8E for ; Thu, 7 Apr 2022 08:57:36 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1649347055; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=i8SPoAicWERrx3mqG+g3WmO5taECtYPYr+UXD+7FONE=; b=geEx8bq+FaarS/1SwtiCZ+i+BubLUzmWJwe9/CW1Kyi0ZLDwHOh5QecgOKR1dcNPhF2XuS M5JEVp9Nb5jdJ+fsx1DR8YESh06faXls0Sn6xnKniN84ilIXSUIBya6jjq8uVFmxr0q6/B iGlX1QHTloG/3yY1B1ZM93XvIPuRB8Y= 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-397-ahDIiYXJPTKQPpwBPSLkvw-1; Thu, 07 Apr 2022 11:57:31 -0400 X-MC-Unique: ahDIiYXJPTKQPpwBPSLkvw-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 6A333811E90; Thu, 7 Apr 2022 15:57:30 +0000 (UTC) Received: from fedora.redhat.com (unknown [10.40.192.50]) by smtp.corp.redhat.com (Postfix) with ESMTP id BE8D454AC84; Thu, 7 Apr 2022 15:57:28 +0000 (UTC) From: Vitaly Kuznetsov To: kvm@vger.kernel.org, Paolo Bonzini Cc: Sean Christopherson , Wanpeng Li , Jim Mattson , Michael Kelley , Siddharth Chandrasekaran , linux-kernel@vger.kernel.org Subject: [PATCH v2 19/31] KVM: x86: Expose Hyper-V Direct TLB flush feature Date: Thu, 7 Apr 2022 17:56:33 +0200 Message-Id: <20220407155645.940890-20-vkuznets@redhat.com> In-Reply-To: <20220407155645.940890-1-vkuznets@redhat.com> References: <20220407155645.940890-1-vkuznets@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.85 on 10.11.54.9 Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org With both nSVM and nVMX implementations in place, KVM can export Hyper-V Direct TLB flush feature to userspace. 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 f08cf295d750..7758ed3dc811 100644 --- a/arch/x86/kvm/hyperv.c +++ b/arch/x86/kvm/hyperv.c @@ -2801,6 +2801,7 @@ int kvm_get_hv_cpuid(struct kvm_vcpu *vcpu, struct kvm_cpuid2 *cpuid, case HYPERV_CPUID_NESTED_FEATURES: ent->eax = evmcs_ver; + ent->eax |= HV_X64_NESTED_DIRECT_FLUSH; ent->eax |= HV_X64_NESTED_MSR_BITMAP; break;