From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933254AbdJQB5g (ORCPT ); Mon, 16 Oct 2017 21:57:36 -0400 Received: from mga06.intel.com ([134.134.136.31]:15331 "EHLO mga06.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S933047AbdJQB5d (ORCPT ); Mon, 16 Oct 2017 21:57:33 -0400 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.43,389,1503385200"; d="scan'208";a="1206548344" From: Luwei Kang To: kvm@vger.kernel.org Cc: pbonzini@redhat.com, rkrcmar@redhat.com, tglx@linutronix.de, mingo@redhat.com, hpa@zytor.com, x86@kernel.org, linux-kernel@vger.kernel.org, Chao Peng , Luwei Kang Subject: [PATCH 9/9] KVM: x86: Disable intercept for Intel processor trace MSRs Date: Mon, 16 Oct 2017 20:14:11 +0800 Message-Id: <1508156051-5024-1-git-send-email-luwei.kang@intel.com> X-Mailer: git-send-email 2.7.4 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Chao Peng Trap for Intel processor trace is none sense. Pass through to guest directly. Signed-off-by: Chao Peng Signed-off-by: Luwei Kang --- arch/x86/kvm/vmx.c | 14 ++++++++++++++ 1 file changed, 14 insertions(+) diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c index 3c9ce3e..58606ce 100644 --- a/arch/x86/kvm/vmx.c +++ b/arch/x86/kvm/vmx.c @@ -7076,6 +7076,20 @@ static __init int hardware_setup(void) if (pt_mode == PT_MODE_GUEST) pt_register_virt_ops(&pt_virt_ops); + if (pt_mode == PT_MODE_GUEST || pt_mode == PT_MODE_HOST_GUEST) { + u32 i, eax, ebx, ecx, edx; + + cpuid_count(0x14, 1, &eax, &ebx, &ecx, &edx); + vmx_disable_intercept_for_msr(MSR_IA32_RTIT_CTL, false); + vmx_disable_intercept_for_msr(MSR_IA32_RTIT_STATUS, false); + vmx_disable_intercept_for_msr(MSR_IA32_RTIT_OUTPUT_BASE, false); + vmx_disable_intercept_for_msr(MSR_IA32_RTIT_OUTPUT_MASK, false); + vmx_disable_intercept_for_msr(MSR_IA32_RTIT_CR3_MATCH, false); + for (i = 0; i < (eax & 0x7); i++) + vmx_disable_intercept_for_msr(MSR_IA32_RTIT_ADDR0_A + i, + false); + } + return alloc_kvm_area(); out: -- 1.8.3.1