diff options
| author | David Matlack <dmatlack@google.com> | 2016-12-16 23:30:36 +0100 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2017-01-12 14:33:17 +0100 |
| commit | cef84c302fe051744b983a92764d3fcca933415d (patch) | |
| tree | 86fc792e45f77560815fde5c000184647a5d1476 /arch/x86/kvm/lapic.c | |
| parent | jump_labels: API for flushing deferred jump label updates (diff) | |
| download | linux-cef84c302fe051744b983a92764d3fcca933415d.tar.xz linux-cef84c302fe051744b983a92764d3fcca933415d.zip | |
KVM: x86: flush pending lapic jump label updates on module unload
KVM's lapic emulation uses static_key_deferred (apic_{hw,sw}_disabled).
These are implemented with delayed_work structs which can still be
pending when the KVM module is unloaded. We've seen this cause kernel
panics when the kvm_intel module is quickly reloaded.
Use the new static_key_deferred_flush() API to flush pending updates on
module unload.
Signed-off-by: David Matlack <dmatlack@google.com>
Cc: stable@vger.kernel.org
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'arch/x86/kvm/lapic.c')
| -rw-r--r-- | arch/x86/kvm/lapic.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/arch/x86/kvm/lapic.c b/arch/x86/kvm/lapic.c index 5fe290c1b7d8..2f6ef5121a4c 100644 --- a/arch/x86/kvm/lapic.c +++ b/arch/x86/kvm/lapic.c @@ -2426,3 +2426,9 @@ void kvm_lapic_init(void) jump_label_rate_limit(&apic_hw_disabled, HZ); jump_label_rate_limit(&apic_sw_disabled, HZ); } + +void kvm_lapic_exit(void) +{ + static_key_deferred_flush(&apic_hw_disabled); + static_key_deferred_flush(&apic_sw_disabled); +} |