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| author |   Marcelo Tosatti <mtosatti@redhat.com> | 2009-06-11 12:07:42 -0300 |
|---|---|---|
| committer |   Avi Kivity <avi@redhat.com> | 2009-09-10 08:32:56 +0300 |
| commit | 94d8b056a20bac4f9905d6dafcf7b7005207684a (patch) | |
| tree | 8ab6678b7c9e8372a314f88a0b61572c19a3b992 /arch | |
| parent | KVM: MMU: make for_each_shadow_entry aware of largepages (diff) | |
| download | linux-dev-94d8b056a20bac4f9905d6dafcf7b7005207684a.tar.xz linux-dev-94d8b056a20bac4f9905d6dafcf7b7005207684a.zip | |
KVM: MMU: add kvm_mmu_get_spte_hierarchy helper
Required by EPT misconfiguration handler.
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/x86/kvm/mmu.c | 18 | ||||
| -rw-r--r-- | 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 e18f65bf2de7..12974de88aa5 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 016bf7183e9f..61a1b3884b49 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)) |