From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752895AbaCGLoF (ORCPT ); Fri, 7 Mar 2014 06:44:05 -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 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: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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 -- 1.8.3.1