diff options
| author | Xiao Guangrong <xiaoguangrong@cn.fujitsu.com> | 2011-05-15 23:28:29 +0800 |
|---|---|---|
| committer | Avi Kivity <avi@redhat.com> | 2011-07-12 11:45:07 +0300 |
| commit | bcdd9a93c57571652c887cb522176db741893581 (patch) | |
| tree | a9d7521a43062db39644e0e4b45f6844de7ff63a | |
| parent | 38e3b2b28c5f8fe7914172f4ba631ef4552824d6 (diff) | |
KVM: MMU: cleanup for dropping parent pte
Introduce drop_parent_pte to remove the rmap of parent pte and
clear parent pte
Signed-off-by: Xiao Guangrong <xiaoguangrong@cn.fujitsu.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
| -rw-r--r-- | arch/x86/kvm/mmu.c | 21 |
1 files changed, 12 insertions, 9 deletions
diff --git a/arch/x86/kvm/mmu.c b/arch/x86/kvm/mmu.c index 71eddc4c9810..15afa1e1eaf9 100644 --- a/arch/x86/kvm/mmu.c +++ b/arch/x86/kvm/mmu.c @@ -1084,6 +1084,13 @@ static void mmu_page_remove_parent_pte(struct kvm_mmu_page *sp, pte_list_remove(parent_pte, &sp->parent_ptes); } +static void drop_parent_pte(struct kvm_mmu_page *sp, + u64 *parent_pte) +{ + mmu_page_remove_parent_pte(sp, parent_pte); + __set_spte(parent_pte, shadow_trap_nonpresent_pte); +} + static struct kvm_mmu_page *kvm_mmu_alloc_page(struct kvm_vcpu *vcpu, u64 *parent_pte, int direct) { @@ -1560,8 +1567,7 @@ static void validate_direct_spte(struct kvm_vcpu *vcpu, u64 *sptep, if (child->role.access == direct_access) return; - mmu_page_remove_parent_pte(child, sptep); - __set_spte(sptep, shadow_trap_nonpresent_pte); + drop_parent_pte(child, sptep); kvm_flush_remote_tlbs(vcpu->kvm); } } @@ -1578,7 +1584,7 @@ static void mmu_page_zap_pte(struct kvm *kvm, struct kvm_mmu_page *sp, drop_spte(kvm, spte, shadow_trap_nonpresent_pte); else { child = page_header(pte & PT64_BASE_ADDR_MASK); - mmu_page_remove_parent_pte(child, spte); + drop_parent_pte(child, spte); } } __set_spte(spte, shadow_trap_nonpresent_pte); @@ -1613,10 +1619,8 @@ static void kvm_mmu_unlink_parents(struct kvm *kvm, struct kvm_mmu_page *sp) { u64 *parent_pte; - while ((parent_pte = pte_list_next(&sp->parent_ptes, NULL))) { - kvm_mmu_put_page(sp, parent_pte); - __set_spte(parent_pte, shadow_trap_nonpresent_pte); - } + while ((parent_pte = pte_list_next(&sp->parent_ptes, NULL))) + drop_parent_pte(sp, parent_pte); } static int mmu_zap_unsync_children(struct kvm *kvm, @@ -2046,8 +2050,7 @@ static void mmu_set_spte(struct kvm_vcpu *vcpu, u64 *sptep, u64 pte = *sptep; child = page_header(pte & PT64_BASE_ADDR_MASK); - mmu_page_remove_parent_pte(child, sptep); - __set_spte(sptep, shadow_trap_nonpresent_pte); + drop_parent_pte(child, sptep); kvm_flush_remote_tlbs(vcpu->kvm); } else if (pfn != spte_to_pfn(*sptep)) { pgprintk("hfn old %llx new %llx\n", |