Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S967229Ab2EPBEt (ORCPT ); Tue, 15 May 2012 21:04:49 -0400 Received: from mga11.intel.com ([192.55.52.93]:43032 "EHLO mga11.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S967209Ab2EPBEr (ORCPT ); Tue, 15 May 2012 21:04:47 -0400 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="4.71,315,1320652800"; d="scan'208";a="166845075" Date: Wed, 16 May 2012 09:08:18 +0800 From: Xudong Hao To: avi@redhat.com Cc: kvm@vger.kernel.org, linux-kernel@vger.kernel.org, haitao.shan@intel.com, xiantao.zhang@intel.com, xudong.hao@intel.com Subject: [PATCH 2/4] Add parameter to control A/D bits support Message-ID: <20120516010818.GC14256@hp-xd.sh.intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.5.19 (2009-01-05) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1787 Lines: 56 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 d2bd719..811a61e 100644 --- a/arch/x86/kvm/vmx.c +++ b/arch/x86/kvm/vmx.c @@ -64,6 +64,9 @@ static bool __read_mostly enable_unrestricted_guest = 1; module_param_named(unrestricted_guest, enable_unrestricted_guest, bool, S_IRUGO); +static int __read_mostly enable_ept_ad_bits = 1; +module_param_named(ept_ad_bits, 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); @@ -779,6 +782,11 @@ 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; @@ -2611,8 +2619,12 @@ 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; -- 1.7.1 -- 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/