[PATCH 07/11] KVM: nVMX: Release shadow vmcs

["Abel Gordon" <abelg@xxxxxxxxxx>]

Unmap vmcs12 and release the corresponding shadow vmcs 

Signed-off-by: Abel Gordon <abelg@xxxxxxxxxx>
---
 arch/x86/kvm/vmx.c |   23 +++++++++++++++--------
 1 file changed, 15 insertions(+), 8 deletions(-)

--- .before/arch/x86/kvm/vmx.c	2013-03-10 18:00:55.000000000 +0200
+++ .after/arch/x86/kvm/vmx.c	2013-03-10 18:00:55.000000000 +0200
@@ -5484,6 +5484,17 @@ static int nested_vmx_check_permission(s
 	return 1;
 }
 
+static inline void nested_release_vmcs12(struct vcpu_vmx *vmx)
+{
+	if (enable_shadow_vmcs) {
+		if (vmx->nested.current_vmcs12 != NULL) {
+			free_vmcs(vmx->nested.current_shadow_vmcs);
+		}
+	}
+	kunmap(vmx->nested.current_vmcs12_page);
+	nested_release_page(vmx->nested.current_vmcs12_page);
+}
+
 /*
  * Free whatever needs to be freed from vmx->nested when L1 goes down, or
  * just stops using VMX.
@@ -5494,8 +5505,7 @@ static void free_nested(struct vcpu_vmx 
 		return;
 	vmx->nested.vmxon = false;
 	if (vmx->nested.current_vmptr != -1ull) {
-		kunmap(vmx->nested.current_vmcs12_page);
-		nested_release_page(vmx->nested.current_vmcs12_page);
+		nested_release_vmcs12(vmx);
 		vmx->nested.current_vmptr = -1ull;
 		vmx->nested.current_vmcs12 = NULL;
 	}
@@ -5640,8 +5650,7 @@ static int handle_vmclear(struct kvm_vcp
 	}
 
 	if (vmptr == vmx->nested.current_vmptr) {
-		kunmap(vmx->nested.current_vmcs12_page);
-		nested_release_page(vmx->nested.current_vmcs12_page);
+		nested_release_vmcs12(vmx);
 		vmx->nested.current_vmptr = -1ull;
 		vmx->nested.current_vmcs12 = NULL;
 	}
@@ -5930,10 +5939,8 @@ static int handle_vmptrld(struct kvm_vcp
 			skip_emulated_instruction(vcpu);
 			return 1;
 		}
-		if (vmx->nested.current_vmptr != -1ull) {
-			kunmap(vmx->nested.current_vmcs12_page);
-			nested_release_page(vmx->nested.current_vmcs12_page);
-		}
+		if (vmx->nested.current_vmptr != -1ull)
+			nested_release_vmcs12(vmx);
 
 		vmx->nested.current_vmptr = vmptr;
 		vmx->nested.current_vmcs12 = new_vmcs12;

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