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From: Xudong Hao <xudong.hao@intel.com>
To: avi@redhat.com
Cc: kvm@vger.kernel.org, linux-kernel@vger.kernel.org,
	takuya.yoshikawa@gmail.com, xiantao.zhang@intel.com,
	Xudong Hao <xudong.hao@intel.com>,
	Haitao Shan <haitao.shan@intel.com>
Subject: [PATCH v2 3/4] Enable EPT A/D bits if supported by turning on relevant bit in EPTP
Date: Mon, 21 May 2012 11:54:02 +0800	[thread overview]
Message-ID: <1337572443-22482-3-git-send-email-xudong.hao@intel.com> (raw)
In-Reply-To: <1337572443-22482-1-git-send-email-xudong.hao@intel.com>

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>
---
 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 f3858bf..e8003b6 100644
--- a/arch/x86/kvm/vmx.c
+++ b/arch/x86/kvm/vmx.c
@@ -3018,6 +3018,8 @@ 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;
-- 
1.5.6


  parent reply	other threads:[~2012-05-21  3:50 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2012-05-21  3:54 [PATCH v2 1/4] Add EPT A/D bits definitions Xudong Hao
2012-05-21  3:54 ` [PATCH v2 2/4] Add parameter to control A/D bits support Xudong Hao
2012-05-21  3:54 ` Xudong Hao [this message]
2012-05-21  3:54 ` [PATCH v2 4/4] Enabling Access bit when doing memory swapping Xudong Hao
2012-05-21  8:21   ` Avi Kivity

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