APIC ID should be set to the initial APIC ID when enabling LAPIC. This only matters if the guest changes APIC ID. No sane OS does that.
Signed-off-by: Radim Krčmář <[email protected]> --- arch/x86/kvm/lapic.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/arch/x86/kvm/lapic.c b/arch/x86/kvm/lapic.c index 41089dbeeafc..0fce77fdbe91 100644 --- a/arch/x86/kvm/lapic.c +++ b/arch/x86/kvm/lapic.c @@ -1720,9 +1720,10 @@ void kvm_lapic_set_base(struct kvm_vcpu *vcpu, u64 value) /* update jump label if enable bit changes */ if ((old_value ^ value) & MSR_IA32_APICBASE_ENABLE) { - if (value & MSR_IA32_APICBASE_ENABLE) + if (value & MSR_IA32_APICBASE_ENABLE) { + kvm_apic_set_xapic_id(apic, vcpu->vcpu_id); static_key_slow_dec_deferred(&apic_hw_disabled); - else + } else static_key_slow_inc(&apic_hw_disabled.key); recalculate_apic_map(vcpu->kvm); } -- 2.9.0
