Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756384Ab2EUDu7 (ORCPT ); Sun, 20 May 2012 23:50:59 -0400 Received: from mga02.intel.com ([134.134.136.20]:5457 "EHLO mga02.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753642Ab2EUDuS (ORCPT ); Sun, 20 May 2012 23:50:18 -0400 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="4.67,352,1309762800"; d="scan'208";a="142675159" From: Xudong Hao To: avi@redhat.com Cc: kvm@vger.kernel.org, linux-kernel@vger.kernel.org, takuya.yoshikawa@gmail.com, xiantao.zhang@intel.com, Xudong Hao , Haitao Shan Subject: [PATCH v2 2/4] Add parameter to control A/D bits support Date: Mon, 21 May 2012 11:54:01 +0800 Message-Id: <1337572443-22482-2-git-send-email-xudong.hao@intel.com> X-Mailer: git-send-email 1.5.6 In-Reply-To: <1337572443-22482-1-git-send-email-xudong.hao@intel.com> References: <1337572443-22482-1-git-send-email-xudong.hao@intel.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1740 Lines: 55 Add kernel parameter to control A/D bits support, it's on by default. Signed-off-by: Haitao Shan Signed-off-by: Xudong Hao --- arch/x86/kvm/vmx.c | 12 ++++++++++++ 1 files changed, 12 insertions(+), 0 deletions(-) diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c index 3062ea9..f3858bf 100644 --- a/arch/x86/kvm/vmx.c +++ b/arch/x86/kvm/vmx.c @@ -71,6 +71,9 @@ static bool __read_mostly enable_unrestricted_guest = 1; module_param_named(unrestricted_guest, enable_unrestricted_guest, bool, S_IRUGO); +static bool __read_mostly enable_ept_ad_bits = 1; +module_param_named(eptad, enable_ept_ad_bits, bool, S_IRUGO); + static bool __read_mostly emulate_invalid_guest_state = 0; module_param(emulate_invalid_guest_state, bool, S_IRUGO); @@ -786,6 +789,11 @@ static inline bool cpu_has_vmx_ept_4levels(void) return vmx_capability.ept & VMX_EPT_PAGE_WALK_4_BIT; } +static inline bool cpu_has_vmx_ept_ad_bits(void) +{ + return vmx_capability.ept & VMX_EPT_AD_BIT; +} + static inline bool cpu_has_vmx_invept_individual_addr(void) { return vmx_capability.ept & VMX_EPT_EXTENT_INDIVIDUAL_BIT; @@ -2624,8 +2632,12 @@ static __init int hardware_setup(void) !cpu_has_vmx_ept_4levels()) { enable_ept = 0; enable_unrestricted_guest = 0; + enable_ept_ad_bits = 0; } + if (!cpu_has_vmx_ept_ad_bits()) + enable_ept_ad_bits = 0; + if (!cpu_has_vmx_unrestricted_guest()) enable_unrestricted_guest = 0; -- 1.5.6 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/