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authorSheng Yang <sheng@linux.intel.com>2009-01-05 21:03:02 -0500
committerAvi Kivity <avi@redhat.com>2009-02-14 19:47:36 -0500
commitad8ba2cd44d4d39fb3fe55d5dcc565b19fc3a7fb (patch)
tree74dfd501fc541b7d55eecec7b9469f1db8225507
parent85db06e514422ae429b5f85742d8111b70bd56f3 (diff)
KVM: Add kvm_arch_sync_events to sync with asynchronize events
kvm_arch_sync_events is introduced to quiet down all other events may happen contemporary with VM destroy process, like IRQ handler and work struct for assigned device. For kvm_arch_sync_events is called at the very beginning of kvm_destroy_vm(), so the state of KVM here is legal and can provide a environment to quiet down other events. Signed-off-by: Sheng Yang <sheng@linux.intel.com> Signed-off-by: Avi Kivity <avi@redhat.com>
-rw-r--r--arch/ia64/kvm/kvm-ia64.c4
-rw-r--r--arch/powerpc/kvm/powerpc.c4
-rw-r--r--arch/s390/kvm/kvm-s390.c4
-rw-r--r--arch/x86/kvm/x86.c4
-rw-r--r--include/linux/kvm_host.h1
-rw-r--r--virt/kvm/kvm_main.c1
6 files changed, 18 insertions, 0 deletions
diff --git a/arch/ia64/kvm/kvm-ia64.c b/arch/ia64/kvm/kvm-ia64.c
index 4e586f6110aa..28f982045f29 100644
--- a/arch/ia64/kvm/kvm-ia64.c
+++ b/arch/ia64/kvm/kvm-ia64.c
@@ -1337,6 +1337,10 @@ static void kvm_release_vm_pages(struct kvm *kvm)
1337 } 1337 }
1338} 1338}
1339 1339
1340void kvm_arch_sync_events(struct kvm *kvm)
1341{
1342}
1343
1340void kvm_arch_destroy_vm(struct kvm *kvm) 1344void kvm_arch_destroy_vm(struct kvm *kvm)
1341{ 1345{
1342 kvm_iommu_unmap_guest(kvm); 1346 kvm_iommu_unmap_guest(kvm);
diff --git a/arch/powerpc/kvm/powerpc.c b/arch/powerpc/kvm/powerpc.c
index 2822c8ccfaaf..5f81256287f5 100644
--- a/arch/powerpc/kvm/powerpc.c
+++ b/arch/powerpc/kvm/powerpc.c
@@ -125,6 +125,10 @@ static void kvmppc_free_vcpus(struct kvm *kvm)
125 } 125 }
126} 126}
127 127
128void kvm_arch_sync_events(struct kvm *kvm)
129{
130}
131
128void kvm_arch_destroy_vm(struct kvm *kvm) 132void kvm_arch_destroy_vm(struct kvm *kvm)
129{ 133{
130 kvmppc_free_vcpus(kvm); 134 kvmppc_free_vcpus(kvm);
diff --git a/arch/s390/kvm/kvm-s390.c b/arch/s390/kvm/kvm-s390.c
index be8497186b96..0d33893e1e89 100644
--- a/arch/s390/kvm/kvm-s390.c
+++ b/arch/s390/kvm/kvm-s390.c
@@ -212,6 +212,10 @@ static void kvm_free_vcpus(struct kvm *kvm)
212 } 212 }
213} 213}
214 214
215void kvm_arch_sync_events(struct kvm *kvm)
216{
217}
218
215void kvm_arch_destroy_vm(struct kvm *kvm) 219void kvm_arch_destroy_vm(struct kvm *kvm)
216{ 220{
217 kvm_free_vcpus(kvm); 221 kvm_free_vcpus(kvm);
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index cc17546a2406..b0fc079f1bee 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -4127,6 +4127,10 @@ static void kvm_free_vcpus(struct kvm *kvm)
4127 4127
4128} 4128}
4129 4129
4130void kvm_arch_sync_events(struct kvm *kvm)
4131{
4132}
4133
4130void kvm_arch_destroy_vm(struct kvm *kvm) 4134void kvm_arch_destroy_vm(struct kvm *kvm)
4131{ 4135{
4132 kvm_free_all_assigned_devices(kvm); 4136 kvm_free_all_assigned_devices(kvm);
diff --git a/include/linux/kvm_host.h b/include/linux/kvm_host.h
index ec49d0be7f52..bf6f703642fc 100644
--- a/include/linux/kvm_host.h
+++ b/include/linux/kvm_host.h
@@ -285,6 +285,7 @@ void kvm_free_physmem(struct kvm *kvm);
285struct kvm *kvm_arch_create_vm(void); 285struct kvm *kvm_arch_create_vm(void);
286void kvm_arch_destroy_vm(struct kvm *kvm); 286void kvm_arch_destroy_vm(struct kvm *kvm);
287void kvm_free_all_assigned_devices(struct kvm *kvm); 287void kvm_free_all_assigned_devices(struct kvm *kvm);
288void kvm_arch_sync_events(struct kvm *kvm);
288 289
289int kvm_cpu_get_interrupt(struct kvm_vcpu *v); 290int kvm_cpu_get_interrupt(struct kvm_vcpu *v);
290int kvm_cpu_has_interrupt(struct kvm_vcpu *v); 291int kvm_cpu_has_interrupt(struct kvm_vcpu *v);
diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c
index 0b6f2f71271f..68e3f1ec1674 100644
--- a/virt/kvm/kvm_main.c
+++ b/virt/kvm/kvm_main.c
@@ -891,6 +891,7 @@ static void kvm_destroy_vm(struct kvm *kvm)
891{ 891{
892 struct mm_struct *mm = kvm->mm; 892 struct mm_struct *mm = kvm->mm;
893 893
894 kvm_arch_sync_events(kvm);
894 spin_lock(&kvm_lock); 895 spin_lock(&kvm_lock);
895 list_del(&kvm->vm_list); 896 list_del(&kvm->vm_list);
896 spin_unlock(&kvm_lock); 897 spin_unlock(&kvm_lock);