On Fri, Mar 04, 2011 at 06:57:27PM +0800, Xiao Guangrong wrote:
> Don not walk to the next level if spte is mapping to the large page
>
> Signed-off-by: Xiao Guangrong <xiaoguangr...@cn.fujitsu.com>
> ---
> arch/x86/kvm/mmu.c | 3 ++-
> 1 files changed, 2 insertions(+), 1 deletions(-)
>
> diff --git a/arch/x86/kvm/mmu.c b/arch/x86/kvm/mmu.c
> index b9bf016..10e0982 100644
> --- a/arch/x86/kvm/mmu.c
> +++ b/arch/x86/kvm/mmu.c
> @@ -3819,7 +3819,8 @@ int kvm_mmu_get_spte_hierarchy(struct kvm_vcpu *vcpu,
> u64 addr, u64 sptes[4])
> for_each_shadow_entry(vcpu, addr, iterator) {
> sptes[iterator.level-1] = *iterator.sptep;
> nr_sptes++;
> - if (!is_shadow_present_pte(*iterator.sptep))
> + if (!is_shadow_present_pte(*iterator.sptep) ||
> + is_last_spte(*iterator.sptep, iterator.level))
> break;
> }
> spin_unlock(&vcpu->kvm->mmu_lock);
shadow_walk_okay covers that case.
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