KVM: VMX: Fix undefined beaviour of EPT after reload kvm-intel.ko

From bcbe1b5c4c6098f122accba4f00f6617baf807f7 Mon Sep 17 00:00:00 2001
From: Sheng Yang <[email protected]>
Date: Wed, 16 Jul 2008 09:25:40 +0800
Subject: [PATCH] KVM: VMX: Fix undefined beaviour of EPT after reload kvm-intel.ko

As well as move set base/mask ptes to vmx_init().

---
 arch/x86/kvm/vmx.c |   20 ++++++++++----------
 1 files changed, 10 insertions(+), 10 deletions(-)

index d47c3f8..baddb6e 100644
@@ -3108,15 +3108,6 @@ static struct kvm_vcpu *vmx_create_vcpu(struct 

kvm *kvm, unsigned int id)
return ERR_PTR(-ENOMEM);

allocate_vpid(vmx);
- if (id == 0 && vm_need_ept()) {
- kvm_mmu_set_base_ptes(VMX_EPT_READABLE_MASK |
- VMX_EPT_WRITABLE_MASK |
- VMX_EPT_DEFAULT_MT << VMX_EPT_MT_EPTE_SHIFT);
- kvm_mmu_set_mask_ptes(0ull, VMX_EPT_FAKE_ACCESSED_MASK,
- VMX_EPT_FAKE_DIRTY_MASK, 0ull,
- VMX_EPT_EXECUTABLE_MASK);
- kvm_enable_tdp();
- }

err = kvm_vcpu_init(&vmx->vcpu, kvm, id); if (err)
@@ -3294,8 +3285,17 @@ static int __init vmx_init(void)
vmx_disable_intercept_for_msr(vmx_msr_bitmap,
MSR_IA32_SYSENTER_ESP);
vmx_disable_intercept_for_msr(vmx_msr_bitmap,
MSR_IA32_SYSENTER_EIP);

- if (vm_need_ept())
+ if (vm_need_ept()) {
bypass_guest_pf = 0;
+ kvm_mmu_set_base_ptes(VMX_EPT_READABLE_MASK |
+ VMX_EPT_WRITABLE_MASK |
+ VMX_EPT_DEFAULT_MT << VMX_EPT_MT_EPTE_SHIFT);
+ kvm_mmu_set_mask_ptes(0ull, VMX_EPT_FAKE_ACCESSED_MASK,
+ VMX_EPT_FAKE_DIRTY_MASK, 0ull,
+ VMX_EPT_EXECUTABLE_MASK);
+ kvm_enable_tdp();
+ } else
+ kvm_disable_tdp();

if (bypass_guest_pf)
kvm_mmu_set_nonpresent_ptes(~0xffeull, 0ull);
--
1.5.6

From bcbe1b5c4c6098f122accba4f00f6617baf807f7 Mon Sep 17 00:00:00 2001
From: Sheng Yang <[email protected]>
Date: Wed, 16 Jul 2008 09:25:40 +0800
Subject: [PATCH] KVM: VMX: Fix undefined beaviour of EPT after reload kvm-intel.ko

As well as move set base/mask ptes to vmx_init().

---
 arch/x86/kvm/vmx.c |   20 ++++++++++----------
 1 files changed, 10 insertions(+), 10 deletions(-)

index d47c3f8..baddb6e 100644
@@ -3108,15 +3108,6 @@ static struct kvm_vcpu *vmx_create_vcpu(struct kvm *kvm, unsigned int id)
 		return ERR_PTR(-ENOMEM);
 
 	allocate_vpid(vmx);
-	if (id == 0 && vm_need_ept()) {
-		kvm_mmu_set_base_ptes(VMX_EPT_READABLE_MASK |
-			VMX_EPT_WRITABLE_MASK |
-			VMX_EPT_DEFAULT_MT << VMX_EPT_MT_EPTE_SHIFT);
-		kvm_mmu_set_mask_ptes(0ull, VMX_EPT_FAKE_ACCESSED_MASK,
-				VMX_EPT_FAKE_DIRTY_MASK, 0ull,
-				VMX_EPT_EXECUTABLE_MASK);
-		kvm_enable_tdp();
-	}
 
 	err = kvm_vcpu_init(&vmx->vcpu, kvm, id);
 	if (err)

@@ -3294,8 +3285,17 @@ static int __init vmx_init(void)
 	vmx_disable_intercept_for_msr(vmx_msr_bitmap, MSR_IA32_SYSENTER_ESP);
 	vmx_disable_intercept_for_msr(vmx_msr_bitmap, MSR_IA32_SYSENTER_EIP);
 
-	if (vm_need_ept())
+	if (vm_need_ept()) {
 		bypass_guest_pf = 0;
+		kvm_mmu_set_base_ptes(VMX_EPT_READABLE_MASK |
+			VMX_EPT_WRITABLE_MASK |
+			VMX_EPT_DEFAULT_MT << VMX_EPT_MT_EPTE_SHIFT);
+		kvm_mmu_set_mask_ptes(0ull, VMX_EPT_FAKE_ACCESSED_MASK,
+				VMX_EPT_FAKE_DIRTY_MASK, 0ull,
+				VMX_EPT_EXECUTABLE_MASK);
+		kvm_enable_tdp();
+	} else
+		kvm_disable_tdp();
 
 	if (bypass_guest_pf)
 		kvm_mmu_set_nonpresent_ptes(~0xffeull, 0ull);

1.5.6