From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752988AbaESGvi (ORCPT ); Mon, 19 May 2014 02:51:38 -0400 Received: from mailgw12.technion.ac.il ([132.68.225.12]:15682 "EHLO mailgw12.technion.ac.il" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752913AbaESGvg (ORCPT ); Mon, 19 May 2014 02:51:36 -0400 X-IronPort-Anti-Spam-Filtered: true X-IronPort-Anti-Spam-Result: As8BALaoeVOERCABjGdsb2JhbABZwHCHQoEOFg4BAQEnPIMlgVGIQctnhVgXjWxkHYQqBIoPph+Baw X-IPAS-Result: As8BALaoeVOERCABjGdsb2JhbABZwHCHQoEOFg4BAQEnPIMlgVGIQctnhVgXjWxkHYQqBIoPph+Baw X-IronPort-AV: E=Sophos;i="4.98,865,1392156000"; d="scan'208";a="106954717" From: Nadav Amit To: pbonzini@redhat.com Cc: gleb@kernel.org, tglx@linutronix.de, mingo@redhat.com, hpa@zytor.com, x86@kernel.org, kvm@vger.kernel.org, linux-kernel@vger.kernel.org, Nadav Amit Subject: [PATCH] KVM: vmx: DR7 masking on task switch emulation is wrong Date: Mon, 19 May 2014 09:50:50 +0300 Message-Id: <1400482250-16631-1-git-send-email-namit@cs.technion.ac.il> X-Mailer: git-send-email 1.9.1 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org The DR7 masking which is done on task switch emulation should be in hex format (clearing the local breakpoints enable bits 0,2,4 and 6). Signed-off-by: Nadav Amit --- arch/x86/kvm/vmx.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c index 138ceff..286d510 100644 --- a/arch/x86/kvm/vmx.c +++ b/arch/x86/kvm/vmx.c @@ -5439,7 +5439,7 @@ static int handle_task_switch(struct kvm_vcpu *vcpu) } /* clear all local breakpoint enable flags */ - vmcs_writel(GUEST_DR7, vmcs_readl(GUEST_DR7) & ~55); + vmcs_writel(GUEST_DR7, vmcs_readl(GUEST_DR7) & ~0x55); /* * TODO: What about debug traps on tss switch? -- 1.9.1