Commit fa834e91 authored Nov 27, 2014 by Radim Krčmář Committed by Paolo Bonzini Dec 04, 2014

KVM: x86: fix APIC physical destination wrapping



x2apic allows destinations > 0xff and we don't want them delivered to
lower APICs.  They are correctly handled by doing nothing.

Signed-off-by: Radim Krčmář <rkrcmar@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

parent 085563fb

arch/x86/kvm/lapic.c

+4 −1

Original line number	Diff line number	Diff line
		@@ -693,7 +693,10 @@ bool kvm_irq_delivery_to_apic_fast(struct kvm kvm, struct kvm_lapic src,
		ret = true;

		if (irq->dest_mode == 0) { /* physical mode */
		dst = &map->phys_map[irq->dest_id & 0xff];
		if (irq->dest_id >= ARRAY_SIZE(map->phys_map))
		goto out;

		dst = &map->phys_map[irq->dest_id];
		} else {
		u32 mda = irq->dest_id << (32 - map->ldr_bits);