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| author | Xiao Guangrong <xiaoguangrong@cn.fujitsu.com> | 2010-07-10 17:37:56 +0800 |
|---|---|---|
| committer | Avi Kivity <avi@redhat.com> | 2010-08-02 06:40:35 +0300 |
| commit | aea924f606c309feead37ab5c43f410a08ff3826 (patch) | |
| tree | 6d409eb035985ebcec3d16b0410706d3e8fcf184 /arch | |
| parent | a6f177efaa5856e22ed0d3c1e81e65b41654d083 (diff) | |
| download | linux-3.10-aea924f606c309feead37ab5c43f410a08ff3826.tar.gz linux-3.10-aea924f606c309feead37ab5c43f410a08ff3826.tar.bz2 linux-3.10-aea924f606c309feead37ab5c43f410a08ff3826.zip | |
KVM: PIT: stop vpit before freeing irq_routing
Fix:
general protection fault: 0000 [#1] PREEMPT SMP DEBUG_PAGEALLOC
......
Call Trace:
[<ffffffffa0159bd1>] ? kvm_set_irq+0xdd/0x24b [kvm]
[<ffffffff8106ea8b>] ? trace_hardirqs_off_caller+0x1f/0x10e
[<ffffffff813ad17f>] ? sub_preempt_count+0xe/0xb6
[<ffffffff8106d273>] ? put_lock_stats+0xe/0x27
...
RIP [<ffffffffa0159c72>] kvm_set_irq+0x17e/0x24b [kvm]
This bug is triggered when guest is shutdown, is because we freed
irq_routing before pit thread stopped
Signed-off-by: Xiao Guangrong <xiaoguangrong@cn.fujitsu.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/x86/kvm/i8254.c | 3 | ||||
| -rw-r--r-- | arch/x86/kvm/x86.c | 2 |
2 files changed, 4 insertions, 1 deletions
diff --git a/arch/x86/kvm/i8254.c b/arch/x86/kvm/i8254.c index 70db4d43539..0fd6378981f 100644 --- a/arch/x86/kvm/i8254.c +++ b/arch/x86/kvm/i8254.c @@ -752,6 +752,9 @@ void kvm_free_pit(struct kvm *kvm) struct hrtimer *timer; if (kvm->arch.vpit) { + kvm_io_bus_unregister_dev(kvm, KVM_PIO_BUS, &kvm->arch.vpit->dev); + kvm_io_bus_unregister_dev(kvm, KVM_PIO_BUS, + &kvm->arch.vpit->speaker_dev); kvm_unregister_irq_mask_notifier(kvm, 0, &kvm->arch.vpit->mask_notifier); kvm_unregister_irq_ack_notifier(kvm, diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c index d51eed239b4..d721e2d81a5 100644 --- a/arch/x86/kvm/x86.c +++ b/arch/x86/kvm/x86.c @@ -5523,12 +5523,12 @@ static void kvm_free_vcpus(struct kvm *kvm) void kvm_arch_sync_events(struct kvm *kvm) { kvm_free_all_assigned_devices(kvm); + kvm_free_pit(kvm); } void kvm_arch_destroy_vm(struct kvm *kvm) { kvm_iommu_unmap_guest(kvm); - kvm_free_pit(kvm); kfree(kvm->arch.vpic); kfree(kvm->arch.vioapic); kvm_free_vcpus(kvm); |