[PATCH 06/10] KVM: nVMX: Release shadow vmcs

[Abel Gordon]

Unmap vmcs12 and release the corresponding shadow vmcs 

Signed-off-by: Abel Gordon <ab...@il.ibm.com>
---
 arch/x86/kvm/vmx.c |   20 ++++++++++++--------
 1 file changed, 12 insertions(+), 8 deletions(-)

--- .before/arch/x86/kvm/vmx.c  2013-04-17 19:58:32.000000000 +0300
+++ .after/arch/x86/kvm/vmx.c   2013-04-17 19:58:32.000000000 +0300
@@ -5592,6 +5592,12 @@ static int nested_vmx_check_permission(s
        return 1;
 }
 
+static inline void nested_release_vmcs12(struct vcpu_vmx *vmx)
+{
+       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.
@@ -5602,8 +5608,9 @@ 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);
+               if (enable_shadow_vmcs)
+                       free_vmcs(vmx->nested.current_shadow_vmcs);
                vmx->nested.current_vmptr = -1ull;
                vmx->nested.current_vmcs12 = NULL;
        }
@@ -5747,8 +5754,7 @@ 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;
        }
@@ -6030,10 +6036,8 @@ 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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