Introducing kvm_arch_flush_shadow_memslot, to invalidate the translations of a single memory slot. Signed-off-by: Marcelo Tosatti <mtosatti@xxxxxxxxxx> Index: kvm/include/linux/kvm_host.h =================================================================== --- kvm.orig/include/linux/kvm_host.h +++ kvm/include/linux/kvm_host.h @@ -458,7 +458,11 @@ void kvm_arch_commit_memory_region(struc int user_alloc); bool kvm_largepages_enabled(void); void kvm_disable_largepages(void); -void kvm_arch_flush_shadow(struct kvm *kvm); +/* flush all memory translations */ +void kvm_arch_flush_shadow_all(struct kvm *kvm); +/* flush memory translations pointing to 'slot' */ +void kvm_arch_flush_shadow_memslot(struct kvm *kvm, + struct kvm_memory_slot *slot); int gfn_to_page_many_atomic(struct kvm *kvm, gfn_t gfn, struct page **pages, int nr_pages); Index: kvm/virt/kvm/kvm_main.c =================================================================== --- kvm.orig/virt/kvm/kvm_main.c +++ kvm/virt/kvm/kvm_main.c @@ -408,7 +408,7 @@ static void kvm_mmu_notifier_release(str int idx; idx = srcu_read_lock(&kvm->srcu); - kvm_arch_flush_shadow(kvm); + kvm_arch_flush_shadow_all(kvm); srcu_read_unlock(&kvm->srcu, idx); } @@ -582,7 +582,7 @@ static void kvm_destroy_vm(struct kvm *k #if defined(CONFIG_MMU_NOTIFIER) && defined(KVM_ARCH_WANT_MMU_NOTIFIER) mmu_notifier_unregister(&kvm->mmu_notifier, kvm->mm); #else - kvm_arch_flush_shadow(kvm); + kvm_arch_flush_shadow_all(kvm); #endif kvm_arch_destroy_vm(kvm); kvm_free_physmem(kvm); @@ -814,7 +814,7 @@ int __kvm_set_memory_region(struct kvm * * - gfn_to_hva (kvm_read_guest, gfn_to_pfn) * - kvm_is_visible_gfn (mmu_check_roots) */ - kvm_arch_flush_shadow(kvm); + kvm_arch_flush_shadow_memslot(kvm, slot); kfree(old_memslots); } @@ -854,7 +854,7 @@ int __kvm_set_memory_region(struct kvm * * mmio sptes. */ if (npages && old.base_gfn != mem->guest_phys_addr >> PAGE_SHIFT) - kvm_arch_flush_shadow(kvm); + kvm_arch_flush_shadow_all(kvm); kvm_free_physmem_slot(&old, &new); kfree(old_memslots); Index: kvm/arch/ia64/kvm/kvm-ia64.c =================================================================== --- kvm.orig/arch/ia64/kvm/kvm-ia64.c +++ kvm/arch/ia64/kvm/kvm-ia64.c @@ -1613,11 +1613,17 @@ void kvm_arch_commit_memory_region(struc return; } -void kvm_arch_flush_shadow(struct kvm *kvm) +void kvm_arch_flush_shadow_all(struct kvm *kvm) { kvm_flush_remote_tlbs(kvm); } +void kvm_arch_flush_shadow_memslot(struct kvm *kvm, + struct kvm_memory_slot *slot) +{ + kvm_arch_flush_shadow_all(); +} + long kvm_arch_dev_ioctl(struct file *filp, unsigned int ioctl, unsigned long arg) { Index: kvm/arch/powerpc/kvm/powerpc.c =================================================================== --- kvm.orig/arch/powerpc/kvm/powerpc.c +++ kvm/arch/powerpc/kvm/powerpc.c @@ -334,8 +334,12 @@ void kvm_arch_commit_memory_region(struc kvmppc_core_commit_memory_region(kvm, mem); } +void kvm_arch_flush_shadow_all(struct kvm *kvm) +{ +} -void kvm_arch_flush_shadow(struct kvm *kvm) +void kvm_arch_flush_shadow_memslot(struct kvm *kvm, + struct kvm_memory_slot *slot) { } Index: kvm/arch/s390/kvm/kvm-s390.c =================================================================== --- kvm.orig/arch/s390/kvm/kvm-s390.c +++ kvm/arch/s390/kvm/kvm-s390.c @@ -969,7 +969,12 @@ void kvm_arch_commit_memory_region(struc return; } -void kvm_arch_flush_shadow(struct kvm *kvm) +void kvm_arch_flush_shadow_all(struct kvm *kvm) +{ +} + +void kvm_arch_flush_shadow_memslot(struct kvm *kvm, + struct kvm_memory_slot *slot) { } Index: kvm/arch/x86/kvm/x86.c =================================================================== --- kvm.orig/arch/x86/kvm/x86.c +++ kvm/arch/x86/kvm/x86.c @@ -6457,12 +6457,18 @@ void kvm_arch_commit_memory_region(struc spin_unlock(&kvm->mmu_lock); } -void kvm_arch_flush_shadow(struct kvm *kvm) +void kvm_arch_flush_shadow_all(struct kvm *kvm) { kvm_mmu_zap_all(kvm); kvm_reload_remote_mmus(kvm); } +void kvm_arch_flush_shadow_memslot(struct kvm *kvm, + struct kvm_memory_slot *slot) +{ + kvm_arch_flush_shadow_all(kvm); +} + int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu) { return (vcpu->arch.mp_state == KVM_MP_STATE_RUNNABLE && -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html