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Subject[PATCH 1/7] KVM: MMU: update 'root_hpa' out of loop in PAE shadow path
The value of 'vcpu->arch.mmu.pae_root' is not modified, so we can update 'root_hpa'
out of the loop

Xiao Guangrong <xiaoguangrong@cn.fujitsu.com>
---
arch/x86/kvm/mmu.c | 4 ++--
1 files changed, 2 insertions(+), 2 deletions(-)
diff --git a/arch/x86/kvm/mmu.c b/arch/x86/kvm/mmu.c
index c94c432..3630046 100644
--- a/arch/x86/kvm/mmu.c
+++ b/arch/x86/kvm/mmu.c
@@ -2393,8 +2393,8 @@ static int mmu_alloc_direct_roots(struct kvm_vcpu *vcpu)
++sp->root_count;
spin_unlock(&vcpu->kvm->mmu_lock);
vcpu->arch.mmu.pae_root[i] = root | PT_PRESENT_MASK;
- vcpu->arch.mmu.root_hpa = __pa(vcpu->arch.mmu.pae_root);
}
+ vcpu->arch.mmu.root_hpa = __pa(vcpu->arch.mmu.pae_root);
} else
BUG();

@@ -2466,8 +2466,8 @@ static int mmu_alloc_shadow_roots(struct kvm_vcpu *vcpu)
spin_unlock(&vcpu->kvm->mmu_lock);

vcpu->arch.mmu.pae_root[i] = root | pm_mask;
- vcpu->arch.mmu.root_hpa = __pa(vcpu->arch.mmu.pae_root);
}
+ vcpu->arch.mmu.root_hpa = __pa(vcpu->arch.mmu.pae_root);

/*
* If we shadow a 32 bit page table with a long mode page
--
1.7.0.4

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