Merge branch 'work.get_user_pages_fast' of git://git.kernel.org/pub/scm/linux/kernel...

[linux-2.6-block.git] / virt / kvm / kvm_main.c

diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c
index ae4985bc8a8aec1f8b5ac850fda5b36c5cc55a2a..d6b9370806f8ca7540de30ff7cc092f842bc1006 100644 (file)
--- a/virt/kvm/kvm_main.c
+++ b/virt/kvm/kvm_main.c
@@ -135,6 +135,11 @@ static void kvm_uevent_notify_change(unsigned int type, struct kvm *kvm);
 static unsigned long long kvm_createvm_count;
 static unsigned long long kvm_active_vms;
 
+__weak void kvm_arch_mmu_notifier_invalidate_range(struct kvm *kvm,
+               unsigned long start, unsigned long end)
+{
+}
+
 bool kvm_is_reserved_pfn(kvm_pfn_t pfn)
 {
        if (pfn_valid(pfn))
@@ -360,6 +365,9 @@ static void kvm_mmu_notifier_invalidate_range_start(struct mmu_notifier *mn,
                kvm_flush_remote_tlbs(kvm);
 
        spin_unlock(&kvm->mmu_lock);
+
+       kvm_arch_mmu_notifier_invalidate_range(kvm, start, end);
+
        srcu_read_unlock(&kvm->srcu, idx);
 }
 
@@ -2046,6 +2054,29 @@ void kvm_vcpu_mark_page_dirty(struct kvm_vcpu *vcpu, gfn_t gfn)
 }
 EXPORT_SYMBOL_GPL(kvm_vcpu_mark_page_dirty);
 
+void kvm_sigset_activate(struct kvm_vcpu *vcpu)
+{
+       if (!vcpu->sigset_active)
+               return;
+
+       /*
+        * This does a lockless modification of ->real_blocked, which is fine
+        * because, only current can change ->real_blocked and all readers of
+        * ->real_blocked don't care as long ->real_blocked is always a subset
+        * of ->blocked.
+        */
+       sigprocmask(SIG_SETMASK, &vcpu->sigset, &current->real_blocked);
+}
+
+void kvm_sigset_deactivate(struct kvm_vcpu *vcpu)
+{
+       if (!vcpu->sigset_active)
+               return;
+
+       sigprocmask(SIG_SETMASK, &current->real_blocked, NULL);
+       sigemptyset(&current->real_blocked);
+}
+
 static void grow_halt_poll_ns(struct kvm_vcpu *vcpu)
 {
        unsigned int old, val, grow;