Commit 085563fb authored Nov 27, 2014 by Radim Krčmář Committed by Paolo Bonzini Dec 04, 2014

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>

parent 698f9755

arch/x86/kvm/lapic.c

+0 −2

Original line number	Diff line number	Diff line
		@@ -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);