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KVM: MMU: update 'root_hpa' out of loop in PAE shadow path

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The value of 'vcpu->arch.mmu.pae_root' is not modified, so we can update
'root_hpa' out of the loop.

Signed-off-by: Xiao Guangrong <xiaoguangrong@cn.fujitsu.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
This commit is contained in:
Xiao Guangrong
2010-09-27 18:02:12 +08:00
committed by Avi Kivity
parent 7129eecac1
commit 6292757fb0
1 changed files with 2 additions and 2 deletions
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4
arch/x86/kvm/mmu.c
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@@ -2393,8 +2393,8 @@ static int mmu_alloc_direct_roots(struct kvm_vcpu *vcpu)
++sp->root_count; ++sp->root_count;
spin_unlock(&vcpu->kvm->mmu_lock); spin_unlock(&vcpu->kvm->mmu_lock);
vcpu->arch.mmu.pae_root[i] = root | PT_PRESENT_MASK; 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 } else
BUG(); BUG();
@@ -2466,8 +2466,8 @@ static int mmu_alloc_shadow_roots(struct kvm_vcpu *vcpu)
spin_unlock(&vcpu->kvm->mmu_lock); spin_unlock(&vcpu->kvm->mmu_lock);
vcpu->arch.mmu.pae_root[i] = root | pm_mask; 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 * If we shadow a 32 bit page table with a long mode page