linux-kernel - [PATCH 40/43] KVM: VMX: Zero ept module parameter if ept is not present

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Message-Id: <1242638585-18470-41-git-send-email-avi@redhat.com>
Date:	Mon, 18 May 2009 12:23:02 +0300
From:	Avi Kivity <avi@...hat.com>
To:	linux-kernel@...r.kernel.org
Cc:	kvm@...r.kernel.org
Subject: [PATCH 40/43] KVM: VMX: Zero ept module parameter if ept is not present

Allows reading back hardware capability.

Signed-off-by: Avi Kivity <avi@...hat.com>
---
 arch/x86/kvm/vmx.c |    5 ++++-
 1 files changed, 4 insertions(+), 1 deletions(-)

diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c
index 9b97c8e..2f65120 100644
--- a/arch/x86/kvm/vmx.c
+++ b/arch/x86/kvm/vmx.c
@@ -265,7 +265,7 @@ static inline int cpu_has_vmx_ept(void)
 
 static inline int vm_need_ept(void)
 {
-	return (cpu_has_vmx_ept() && enable_ept);
+	return enable_ept;
 }
 
 static inline int vm_need_virtualize_apic_accesses(struct kvm *kvm)
@@ -1205,6 +1205,9 @@ static __init int setup_vmcs_config(struct vmcs_config *vmcs_conf)
 	if (!cpu_has_vmx_vpid())
 		enable_vpid = 0;
 
+	if (!cpu_has_vmx_ept())
+		enable_ept = 0;
+
 	min = 0;
 #ifdef CONFIG_X86_64
 	min |= VM_EXIT_HOST_ADDR_SPACE_SIZE;
-- 
1.6.0.6

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