[PATCH 3/4] Enable EPT A/D bits if supported by turning onrelevant bit in EPTP

[Xudong Hao]

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

Signed-off-by: Haitao Shan <haitao.shan@xxxxxxxxx>
Signed-off-by: Xudong Hao <xudong.hao@xxxxxxxxx>
---
 arch/x86/kvm/vmx.c |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)

diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c
index 811a61e..89151a9 100644
--- a/arch/x86/kvm/vmx.c
+++ b/arch/x86/kvm/vmx.c
@@ -3005,6 +3005,8 @@ 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;
--
1.7.1

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