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KVM: x86: deliver phys lowest-prio 

Physical mode can't address more than one APIC, but lowest-prio is
allowed, so we just reuse our paths.

SDM 10.6.2.1 Physical Destination:
  Also, for any non-broadcast IPI or I/O subsystem initiated interrupt
  with lowest priority delivery mode, software must ensure that APICs
  defined in the interrupt address are present and enabled to receive
  interrupts.

We could warn on top of that.

Signed-off-by: Radim Krčmář <rkrcmar@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Radim Krčmář 2014-11-27 20:03:11 +01:00 committed by Paolo Bonzini
parent 698f9755d9
commit 085563fb04
1 changed files with 0 additions and 2 deletions
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2
arch/x86/kvm/lapic.c
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@ -693,8 +693,6 @@ bool kvm_irq_delivery_to_apic_fast(struct kvm *kvm, struct kvm_lapic *src,
ret = true;
if (irq->dest_mode == 0) { /* physical mode */
if (irq->delivery_mode == APIC_DM_LOWEST)
goto out;
dst = &map->phys_map[irq->dest_id & 0xff];
} else {
u32 mda = irq->dest_id << (32 - map->ldr_bits);