From: Marcelo Tosatti <mtosatti@xxxxxxxxxx>
Required by EPT misconfiguration handler.
Signed-off-by: Marcelo Tosatti <mtosatti@xxxxxxxxxx>
Signed-off-by: Avi Kivity <avi@xxxxxxxxxx>
---
arch/x86/kvm/mmu.c | 18 ++++++++++++++++++
arch/x86/kvm/mmu.h | 2 ++
2 files changed, 20 insertions(+), 0 deletions(-)
diff --git a/arch/x86/kvm/mmu.c b/arch/x86/kvm/mmu.c
index e18f65b..12974de 100644
--- a/arch/x86/kvm/mmu.c
+++ b/arch/x86/kvm/mmu.c
@@ -3038,6 +3038,24 @@ out:
return r;
}
+int kvm_mmu_get_spte_hierarchy(struct kvm_vcpu *vcpu, u64 addr, u64 sptes[4])
+{
+ struct kvm_shadow_walk_iterator iterator;
+ int nr_sptes = 0;
+
+ spin_lock(&vcpu->kvm->mmu_lock);
+ for_each_shadow_entry(vcpu, addr, iterator) {
+ sptes[iterator.level-1] = *iterator.sptep;
+ nr_sptes++;
+ if (!is_shadow_present_pte(*iterator.sptep))
+ break;
+ }
+ spin_unlock(&vcpu->kvm->mmu_lock);
+
+ return nr_sptes;
+}
+EXPORT_SYMBOL_GPL(kvm_mmu_get_spte_hierarchy);
+
#ifdef AUDIT
static const char *audit_msg;
diff --git a/arch/x86/kvm/mmu.h b/arch/x86/kvm/mmu.h
index 016bf71..61a1b38 100644
--- a/arch/x86/kvm/mmu.h
+++ b/arch/x86/kvm/mmu.h
@@ -37,6 +37,8 @@
#define PT32_ROOT_LEVEL 2
#define PT32E_ROOT_LEVEL 3
+int kvm_mmu_get_spte_hierarchy(struct kvm_vcpu *vcpu, u64 addr, u64 sptes[4]);
+
static inline void kvm_mmu_free_some_pages(struct kvm_vcpu *vcpu)
{
if (unlikely(vcpu->kvm->arch.n_free_mmu_pages < KVM_MIN_FREE_MMU_PAGES))
--
1.6.3.3
--
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