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| author | Christian Borntraeger <borntraeger@de.ibm.com> | 2008-11-26 14:50:27 +0100 |
|---|---|---|
| committer | Avi Kivity <avi@redhat.com> | 2008-12-31 16:55:03 +0200 |
| commit | d329c035e754156ffabcb64ff75d05bb8e2ddbf5 (patch) | |
| tree | 4417fc296c719f23e952076873cdb91a4c3c757d /arch/s390 | |
| parent | 6b7ad61ffb9ca110add6f7fb36cc8a4dd89696a4 (diff) | |
| download | linux-d329c035e754156ffabcb64ff75d05bb8e2ddbf5.tar.gz linux-d329c035e754156ffabcb64ff75d05bb8e2ddbf5.tar.bz2 linux-d329c035e754156ffabcb64ff75d05bb8e2ddbf5.zip | |
KVM: s390: Fix refcounting and allow module unload
Currently it is impossible to unload the kvm module on s390.
This patch fixes kvm_arch_destroy_vm to release all cpus.
This make it possible to unload the module.
In addition we stop messing with the module refcount in arch code.
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Acked-by: Carsten Otte <cotte@de.ibm.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
Diffstat (limited to 'arch/s390')
| -rw-r--r-- | arch/s390/kvm/kvm-s390.c | 35 |
1 files changed, 21 insertions, 14 deletions
diff --git a/arch/s390/kvm/kvm-s390.c b/arch/s390/kvm/kvm-s390.c index 8b00eb2ddf57..3db9e5d45a67 100644 --- a/arch/s390/kvm/kvm-s390.c +++ b/arch/s390/kvm/kvm-s390.c @@ -185,8 +185,6 @@ struct kvm *kvm_arch_create_vm(void) debug_register_view(kvm->arch.dbf, &debug_sprintf_view); VM_EVENT(kvm, 3, "%s", "vm created"); - try_module_get(THIS_MODULE); - return kvm; out_nodbf: free_page((unsigned long)(kvm->arch.sca)); @@ -196,13 +194,32 @@ out_nokvm: return ERR_PTR(rc); } +void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu) +{ + VCPU_EVENT(vcpu, 3, "%s", "free cpu"); + free_page((unsigned long)(vcpu->arch.sie_block)); + kfree(vcpu); +} + +static void kvm_free_vcpus(struct kvm *kvm) +{ + unsigned int i; + + for (i = 0; i < KVM_MAX_VCPUS; ++i) { + if (kvm->vcpus[i]) { + kvm_arch_vcpu_destroy(kvm->vcpus[i]); + kvm->vcpus[i] = NULL; + } + } +} + void kvm_arch_destroy_vm(struct kvm *kvm) { - debug_unregister(kvm->arch.dbf); + kvm_free_vcpus(kvm); kvm_free_physmem(kvm); free_page((unsigned long)(kvm->arch.sca)); + debug_unregister(kvm->arch.dbf); kfree(kvm); - module_put(THIS_MODULE); } /* Section: vcpu related */ @@ -308,8 +325,6 @@ struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, VM_EVENT(kvm, 3, "create cpu %d at %p, sie block at %p", id, vcpu, vcpu->arch.sie_block); - try_module_get(THIS_MODULE); - return vcpu; out_free_cpu: kfree(vcpu); @@ -317,14 +332,6 @@ out_nomem: return ERR_PTR(rc); } -void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu) -{ - VCPU_EVENT(vcpu, 3, "%s", "destroy cpu"); - free_page((unsigned long)(vcpu->arch.sie_block)); - kfree(vcpu); - module_put(THIS_MODULE); -} - int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu) { /* kvm common code refers to this, but never calls it */ |