From patchwork Fri Mar 7 11:42:49 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Paolo Bonzini X-Patchwork-Id: 3790011 Return-Path: X-Original-To: patchwork-kvm@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.19.201]) by patchwork1.web.kernel.org (Postfix) with ESMTP id B30EB9F369 for ; Fri, 7 Mar 2014 11:44:25 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id E158F201DC for ; Fri, 7 Mar 2014 11:44:24 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 1B77A201D5 for ; Fri, 7 Mar 2014 11:44:24 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752862AbaCGLoE (ORCPT ); Fri, 7 Mar 2014 06:44:04 -0500 Received: from mail-ee0-f46.google.com ([74.125.83.46]:47389 "EHLO mail-ee0-f46.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752618AbaCGLnM (ORCPT ); Fri, 7 Mar 2014 06:43:12 -0500 Received: by mail-ee0-f46.google.com with SMTP id t10so1645465eei.5 for ; Fri, 07 Mar 2014 03:43:11 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=sender:from:to:cc:subject:date:message-id:in-reply-to:references; bh=caXONCFNJt3HGS17k3W3sjnxUQ8ynyYIHgDEj4N+iD0=; b=OzIODJtOXZK4OGRqrvRR4/KmtbhfyHILdr06w1gQ5eRJ7ln8r3tlAHOuAAj4uh2YUW wCPHiqo12PB0dr5B6uYGLd/bRs9AT3yAcNA9KsJVdDCUeof2TPCpHCXt8cyCTlQ8LQ0B Dipu4yDFrXk+XJjWqfnxmapNw53ux5BW7wfL6LLkW75fifK5bNkEyDJFHp9uWtQQi5Sr KzrNRihEsEjdm6QJkqGVF8zL//ZDsMFH4j8Gb9i4JfpOJzTooie4hi9ta9u4GtRb7Ghb reYqtFNV43fi/YDIL+wMr1Ac5GFPc03JrPBLQHsOjc93J+j8aDk1Ozm5DVUjzJqrBEIQ hVJA== X-Received: by 10.15.23.194 with SMTP id h42mr18342416eeu.32.1394192591838; Fri, 07 Mar 2014 03:43:11 -0800 (PST) Received: from playground.com (net-37-117-154-249.cust.vodafonedsl.it. [37.117.154.249]) by mx.google.com with ESMTPSA id f45sm5662067eeg.5.2014.03.07.03.43.09 for (version=TLSv1.2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Fri, 07 Mar 2014 03:43:11 -0800 (PST) From: Paolo Bonzini To: linux-kernel@vger.kernel.org Cc: kvm@vger.kernel.org, alex.williamson@redhat.com, mtosatti@redhat.com, gleb@kernel.org, jan.kiszka@siemens.com Subject: [PATCH 5/7] KVM: nVMX: Allow nested guests to run with dirty debug registers Date: Fri, 7 Mar 2014 12:42:49 +0100 Message-Id: <1394192571-11056-6-git-send-email-pbonzini@redhat.com> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: <1394192571-11056-1-git-send-email-pbonzini@redhat.com> References: <1394192571-11056-1-git-send-email-pbonzini@redhat.com> Sender: kvm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org X-Spam-Status: No, score=-6.8 required=5.0 tests=BAYES_00,DKIM_SIGNED, RCVD_IN_DNSWL_HI,T_DKIM_INVALID,T_RP_MATCHES_RCVD,UNPARSEABLE_RELAY autolearn=ham version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP When preparing the VMCS02, the CPU-based execution controls is computed by vmx_exec_control. Turn off DR access exits there, too, if the KVM_DEBUGREG_WONT_EXIT bit is set in switch_db_regs. Signed-off-by: Paolo Bonzini --- arch/x86/kvm/vmx.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c index e377522408b1..73ced6efc93e 100644 --- a/arch/x86/kvm/vmx.c +++ b/arch/x86/kvm/vmx.c @@ -4234,6 +4234,10 @@ static u32 vmx_pin_based_exec_ctrl(struct vcpu_vmx *vmx) static u32 vmx_exec_control(struct vcpu_vmx *vmx) { u32 exec_control = vmcs_config.cpu_based_exec_ctrl; + + if (vmx->vcpu.arch.switch_db_regs & KVM_DEBUGREG_WONT_EXIT) + exec_control &= ~CPU_BASED_MOV_DR_EXITING; + if (!vm_need_tpr_shadow(vmx->vcpu.kvm)) { exec_control &= ~CPU_BASED_TPR_SHADOW; #ifdef CONFIG_X86_64