[PATCH][v2 2/3] KVM: Clean up duplicate assignment

[Sheng Yang <sheng@linux.intel.com>]

mmu.free() already set root_hpa to INVALID_PAGE, no need to do it again in the
destory_kvm_mmu().

kvm_x86_ops->set_cr4() and set_efer() already assign cr4/efer to
vcpu->arch.cr4/efer, no need to do it again later.

Signed-off-by: Sheng Yang <sheng@linux.intel.com>
---
 arch/x86/kvm/mmu.c |    5 ++---
 arch/x86/kvm/x86.c |    4 +---
 2 files changed, 3 insertions(+), 6 deletions(-)

diff --git a/arch/x86/kvm/mmu.c b/arch/x86/kvm/mmu.c
index 95bee9d..5412185 100644
--- a/arch/x86/kvm/mmu.c
+++ b/arch/x86/kvm/mmu.c
@@ -2450,10 +2450,9 @@ static int init_kvm_mmu(struct kvm_vcpu *vcpu)
 static void destroy_kvm_mmu(struct kvm_vcpu *vcpu)
 {
 	ASSERT(vcpu);
-	if (VALID_PAGE(vcpu->arch.mmu.root_hpa)) {
+	if (VALID_PAGE(vcpu->arch.mmu.root_hpa))
+		/* mmu.free() should set root_hpa = INVALID_PAGE */
 		vcpu->arch.mmu.free(vcpu);
-		vcpu->arch.mmu.root_hpa = INVALID_PAGE;
-	}
 }
 
 int kvm_mmu_reset_context(struct kvm_vcpu *vcpu)
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index 2cae460..764f89b 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -486,7 +486,7 @@ int __kvm_set_cr4(struct kvm_vcpu *vcpu, unsigned long cr4)
 		return 1;
 
 	kvm_x86_ops->set_cr4(vcpu, cr4);
-	vcpu->arch.cr4 = cr4;
+
 	kvm_mmu_reset_context(vcpu);
 
 	return 0;
@@ -720,8 +720,6 @@ static int set_efer(struct kvm_vcpu *vcpu, u64 efer)
 
 	kvm_x86_ops->set_efer(vcpu, efer);
 
-	vcpu->arch.efer = efer;
-
 	vcpu->arch.mmu.base_role.nxe = (efer & EFER_NX) && !tdp_enabled;
 	kvm_mmu_reset_context(vcpu);
 
-- 
1.7.0.1