From: Marcelo Tosatti <mtosatti@redhat.com>
To: Xiao Guangrong <xiaoguangrong@cn.fujitsu.com>
Cc: Avi Kivity <avi@redhat.com>, LKML <linux-kernel@vger.kernel.org>,
KVM <kvm@vger.kernel.org>
Subject: Re: [PATCH 2/10] KVM: MMU: fix kvm_mmu_get_spte_hierarchy
Date: Sat, 5 Mar 2011 13:48:05 -0300 [thread overview]
Message-ID: <20110305164805.GB4607@amt.cnet> (raw)
In-Reply-To: <4D70C597.4070105@cn.fujitsu.com>
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 <xiaoguangrong@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.
next prev parent reply other threads:[~2011-03-05 17:03 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-03-04 10:56 [PATCH 1/10] KVM: MMU: fix kvm_mmu_slot_remove_write_access Xiao Guangrong
2011-03-04 10:57 ` [PATCH 2/10] KVM: MMU: fix kvm_mmu_get_spte_hierarchy Xiao Guangrong
2011-03-05 16:48 ` Marcelo Tosatti [this message]
2011-03-07 3:06 ` Xiao Guangrong
2011-03-07 8:55 ` Avi Kivity
2011-03-04 10:58 ` [PATCH 3/10] KVM: MMU: set spte accessed bit properly Xiao Guangrong
2011-03-04 10:58 ` [PATCH 4/10] KVM: fix rcu usage in init_rmode_* functions Xiao Guangrong
2011-03-04 11:43 ` Jan Kiszka
2011-03-07 2:04 ` Xiao Guangrong
2011-03-04 10:59 ` [PATCH 5/10] KVM: MMU: move mmu pages calculated out of mmu lock Xiao Guangrong
2011-03-04 11:00 ` [PATCH 6/10] KVM: MMU: don not record gfn in kvm_mmu_pte_write Xiao Guangrong
2011-03-06 12:14 ` Avi Kivity
2011-03-06 12:16 ` Avi Kivity
2011-03-07 3:16 ` Xiao Guangrong
2011-03-04 11:00 ` [PATCH 7/10] KVM: MMU: introduce a common function to get no-dirty-logged slot Xiao Guangrong
2011-03-06 12:28 ` Avi Kivity
2011-03-07 3:50 ` Xiao Guangrong
2011-03-04 11:01 ` [PATCH 8/10] KVM: MMU: cleanup page alloc and free Xiao Guangrong
2011-03-04 11:01 ` [PATCH 9/10] KVM: MMU: remove unused macros Xiao Guangrong
2011-03-04 11:02 ` [PATCH 10/10] KVM: cleanup memslot_id function Xiao Guangrong
2011-03-06 12:32 ` Avi Kivity
2011-03-06 12:34 ` [PATCH 1/10] KVM: MMU: fix kvm_mmu_slot_remove_write_access Avi Kivity
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