From patchwork Tue Jul 12 22:18:52 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Bandan Das X-Patchwork-Id: 9226359 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id A4882608A1 for ; Tue, 12 Jul 2016 22:21:48 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 9299727F9A for ; Tue, 12 Jul 2016 22:21:48 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 876BF27FA2; Tue, 12 Jul 2016 22:21:48 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.9 required=2.0 tests=BAYES_00,RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 44AD427DCE for ; Tue, 12 Jul 2016 22:21:48 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752393AbcGLWUF (ORCPT ); Tue, 12 Jul 2016 18:20:05 -0400 Received: from mx1.redhat.com ([209.132.183.28]:39934 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1752381AbcGLWUE (ORCPT ); Tue, 12 Jul 2016 18:20:04 -0400 Received: from int-mx09.intmail.prod.int.phx2.redhat.com (int-mx09.intmail.prod.int.phx2.redhat.com [10.5.11.22]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 6DFE9329C; Tue, 12 Jul 2016 22:19:23 +0000 (UTC) Received: from gigantic.usersys.redhat.com (dhcp-17-169.bos.redhat.com [10.18.17.169]) by int-mx09.intmail.prod.int.phx2.redhat.com (8.14.4/8.14.4) with ESMTP id u6CMJI2b027271; Tue, 12 Jul 2016 18:19:22 -0400 From: Bandan Das To: kvm@vger.kernel.org Cc: pbonzini@redhat.com, guangrong.xiao@linux.intel.com, kernellwp@gmail.com, linux-kernel@vger.kernel.org Subject: [PATCH v2 5/5] vmx: advertise support for ept execute only Date: Tue, 12 Jul 2016 18:18:52 -0400 Message-Id: <1468361932-16580-6-git-send-email-bsd@redhat.com> In-Reply-To: <1468361932-16580-1-git-send-email-bsd@redhat.com> References: <1468361932-16580-1-git-send-email-bsd@redhat.com> X-Scanned-By: MIMEDefang 2.68 on 10.5.11.22 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.29]); Tue, 12 Jul 2016 22:19:23 +0000 (UTC) Sender: kvm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP MMU now knows about execute only mappings, so advertise the feature to L1 hypervisors Signed-off-by: Bandan Das --- arch/x86/kvm/vmx.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c index f73b5dc..2c49355f 100644 --- a/arch/x86/kvm/vmx.c +++ b/arch/x86/kvm/vmx.c @@ -2717,6 +2717,9 @@ static void nested_vmx_setup_ctls_msrs(struct vcpu_vmx *vmx) vmx->nested.nested_vmx_ept_caps = VMX_EPT_PAGE_WALK_4_BIT | VMX_EPTP_WB_BIT | VMX_EPT_2MB_PAGE_BIT | VMX_EPT_INVEPT_BIT; + if (cpu_has_vmx_ept_execute_only()) + vmx->nested.nested_vmx_ept_caps |= + VMX_EPT_EXECUTE_ONLY_BIT; vmx->nested.nested_vmx_ept_caps &= vmx_capability.ept; /* * For nested guests, we don't do anything specific