From mboxrd@z Thu Jan 1 00:00:00 1970 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 E868CC433EF for ; Wed, 11 May 2022 11:34:24 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S240207AbiEKLeW (ORCPT ); Wed, 11 May 2022 07:34:22 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:36480 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S239193AbiEKLeN (ORCPT ); Wed, 11 May 2022 07:34:13 -0400 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.133.124]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id E6F2363BC9 for ; Wed, 11 May 2022 04:34:11 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1652268851; 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=mdeNvQnnRKq3lrGA3PKNhx7zg1/AlenjiqX4C5ajWH8=; b=cL2xDAc+xowVyeofo3+TSX0YQYg1i0QlLyt3MOi/Mm4K5SsP9BtXwgxm2nXlgpU/WBWp2H FRwS18FT3h376RYgt2zhyTrDsnb2za0+XuS8E0QgmYX6uLUFqfdvAYAJAhZm3qyIxKQ3Qg tpTnzkodZSxWknAGBs7dYLJhw/t7xs4= Received: from mimecast-mx02.redhat.com (mx3-rdu2.redhat.com [66.187.233.73]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-582-YH3jB-eAMvW9f57drIZoQg-1; Wed, 11 May 2022 07:34:07 -0400 X-MC-Unique: YH3jB-eAMvW9f57drIZoQg-1 Received: from smtp.corp.redhat.com (int-mx03.intmail.prod.int.rdu2.redhat.com [10.11.54.3]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id 6F37C1C01B28; Wed, 11 May 2022 11:34:07 +0000 (UTC) Received: from starship (unknown [10.40.192.26]) by smtp.corp.redhat.com (Postfix) with ESMTP id D126D1121314; Wed, 11 May 2022 11:34:03 +0000 (UTC) Message-ID: <5f10e72e7be843c629c5de4be93fad6ac091c285.camel@redhat.com> Subject: Re: [PATCH v3 22/34] KVM: x86: Expose Hyper-V L2 TLB flush feature From: Maxim Levitsky To: Vitaly Kuznetsov , kvm@vger.kernel.org, Paolo Bonzini Cc: Sean Christopherson , Wanpeng Li , Jim Mattson , Michael Kelley , Siddharth Chandrasekaran , linux-hyperv@vger.kernel.org, linux-kernel@vger.kernel.org Date: Wed, 11 May 2022 14:34:02 +0300 In-Reply-To: <20220414132013.1588929-23-vkuznets@redhat.com> References: <20220414132013.1588929-1-vkuznets@redhat.com> <20220414132013.1588929-23-vkuznets@redhat.com> Content-Type: text/plain; charset="UTF-8" User-Agent: Evolution 3.36.5 (3.36.5-2.fc32) MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Scanned-By: MIMEDefang 2.78 on 10.11.54.3 Precedence: bulk List-ID: X-Mailing-List: linux-hyperv@vger.kernel.org On Thu, 2022-04-14 at 15:20 +0200, Vitaly Kuznetsov wrote: > With both nSVM and nVMX implementations in place, KVM can now expose > Hyper-V L2 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 68a0df4e3f66..1d6927538bc7 100644 > --- a/arch/x86/kvm/hyperv.c > +++ b/arch/x86/kvm/hyperv.c > @@ -2826,6 +2826,7 @@ 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; Reviewed-by: Maxim Levitsky Best regards, Maxim Levitsky