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From: Wanpeng Li <kernellwp@gmail.com>
To: linux-kernel@vger.kernel.org, kvm@vger.kernel.org
Cc: "Paolo Bonzini" <pbonzini@redhat.com>,
	"Radim Krčmář" <rkrcmar@redhat.com>,
	"Wanpeng Li" <wanpeng.li@hotmail.com>
Subject: [PATCH v2 2/2] KVM: VMX: Don't enable EPT A/D feature if EPT feature is disabled
Date: Thu, 11 May 2017 02:58:56 -0700	[thread overview]
Message-ID: <1494496736-9178-2-git-send-email-wanpeng.li@hotmail.com> (raw)
In-Reply-To: <1494496736-9178-1-git-send-email-wanpeng.li@hotmail.com>

From: Wanpeng Li <wanpeng.li@hotmail.com>

We can observe eptad kvm_intel module parameter is still Y 
even if ept is disabled which is weird. This patch will 
not enable EPT A/D feature if EPT feature is disabled.

Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Radim Krčmář <rkrcmar@redhat.com>
Signed-off-by: Wanpeng Li <wanpeng.li@hotmail.com>
---
 arch/x86/kvm/vmx.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c
index c6f4ad4..04c16ea 100644
--- a/arch/x86/kvm/vmx.c
+++ b/arch/x86/kvm/vmx.c
@@ -6504,7 +6504,7 @@ static __init int hardware_setup(void)
 		enable_ept_ad_bits = 0;
 	}
 
-	if (!cpu_has_vmx_ept_ad_bits())
+	if (!cpu_has_vmx_ept_ad_bits() || !enable_ept)
 		enable_ept_ad_bits = 0;
 
 	if (!cpu_has_vmx_unrestricted_guest())
-- 
2.7.4

      reply	other threads:[~2017-05-11  9:59 UTC|newest]

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-05-11  9:58 [PATCH v2 1/2] KVM: x86: Fix load damaged SSEx MXCSR register Wanpeng Li
2017-05-11  9:58 ` Wanpeng Li [this message]

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