From: Xudong Hao <xudong.hao@intel.com>
Date: Mon, 28 May 2012 11:33:36 +0000 (+0800)
Subject: KVM: VMX: Enable EPT A/D bits if supported by turning on relevant bit in EPTP
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=b38f99347871d7fc49e6367395dce0d757f6ab8d;p=linux-beck.git

KVM: VMX: Enable EPT A/D bits if supported by turning on relevant bit in EPTP

In EPT page structure entry, Enable EPT A/D bits if processor supported.

Signed-off-by: Haitao Shan <haitao.shan@intel.com>
Signed-off-by: Xudong Hao <xudong.hao@intel.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
---

diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c
index 18590e003bd2..d392e5427ca0 100644
--- a/arch/x86/kvm/vmx.c
+++ b/arch/x86/kvm/vmx.c
@@ -3039,6 +3039,8 @@ static u64 construct_eptp(unsigned long root_hpa)
 	/* TODO write the value reading from MSR */
 	eptp = VMX_EPT_DEFAULT_MT |
 		VMX_EPT_DEFAULT_GAW << VMX_EPT_GAW_EPTP_SHIFT;
+	if (enable_ept_ad_bits)
+		eptp |= VMX_EPT_AD_ENABLE_BIT;
 	eptp |= (root_hpa & PAGE_MASK);
 
 	return eptp;