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| author |   Radim Krčmář <rkrcmar@redhat.com> | 2015-10-30 15:48:20 +0100 |
|---|---|---|
| committer |   Paolo Bonzini <pbonzini@redhat.com> | 2015-11-04 16:24:34 +0100 |
| commit | 0669a51015c58b1f036030743a0c0781eb63867f (patch) | |
| tree | 335bbe1aa81071f50d05c9af247abad44fad72c0 /arch/x86/kvm | |
| parent | drivers/hv: share Hyper-V SynIC constants with userspace (diff) | |
| download | linux-dev-0669a51015c58b1f036030743a0c0781eb63867f.tar.xz linux-dev-0669a51015c58b1f036030743a0c0781eb63867f.zip | |
KVM: x86: zero apic_arb_prio on reset
BSP doesn't get INIT so its apic_arb_prio isn't zeroed after reboot.
BSP won't get lowest priority interrupts until other VCPUs get enough
interrupts to match their pre-reboot apic_arb_prio.
That behavior doesn't fit into KVM's round-robin-like interpretation of
lowest priority delivery ... userspace should KVM_SET_LAPIC on reset, so
just zero apic_arb_prio there.
Reported-by: Yuki Shibuya <shibuya.yk@ncos.nec.co.jp>
Signed-off-by: Radim Krčmář <rkrcmar@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'arch/x86/kvm')
| -rw-r--r-- | arch/x86/kvm/lapic.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/x86/kvm/lapic.c b/arch/x86/kvm/lapic.c index 168b8759bd73..ecd4ea1d28a8 100644 --- a/arch/x86/kvm/lapic.c +++ b/arch/x86/kvm/lapic.c @@ -1918,6 +1918,8 @@ void kvm_apic_post_state_restore(struct kvm_vcpu *vcpu, kvm_make_request(KVM_REQ_EVENT, vcpu); if (ioapic_in_kernel(vcpu->kvm)) kvm_rtc_eoi_tracking_restore_one(vcpu); + + vcpu->arch.apic_arb_prio = 0; } void __kvm_migrate_apic_timer(struct kvm_vcpu *vcpu) |