From: Joerg Roedel <jroedel@suse.de>
Date: Mon, 29 Feb 2016 15:04:44 +0000 (+0100)
Subject: kvm: x86: Track irq vectors in ioapic->rtc_status.dest_map
X-Git-Url: http://drtracing.org/?a=commitdiff_plain;h=9daa50076f585854f0040aa8403eac020d6f5d64;p=deliverable%2Flinux.git

kvm: x86: Track irq vectors in ioapic->rtc_status.dest_map

This allows backtracking later in case the rtc irq has been
moved to another vcpu/vector.

Signed-off-by: Joerg Roedel <jroedel@suse.de>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---

diff --git a/arch/x86/kvm/ioapic.h b/arch/x86/kvm/ioapic.h
index af729890f6f5..7d2692a49657 100644
--- a/arch/x86/kvm/ioapic.h
+++ b/arch/x86/kvm/ioapic.h
@@ -41,7 +41,14 @@ struct kvm_vcpu;
 #endif
 
 struct dest_map {
+	/* vcpu bitmap where IRQ has been sent */
 	DECLARE_BITMAP(map, KVM_MAX_VCPUS);
+
+	/*
+	 * Vector sent to a given vcpu, only valid when
+	 * the vcpu's bit in map is set
+	 */
+	u8 vectors[KVM_MAX_VCPUS];
 };
 
 
diff --git a/arch/x86/kvm/lapic.c b/arch/x86/kvm/lapic.c
index e085695e6b5a..d9ae1ce2a6a0 100644
--- a/arch/x86/kvm/lapic.c
+++ b/arch/x86/kvm/lapic.c
@@ -914,8 +914,10 @@ static int __apic_accept_irq(struct kvm_lapic *apic, int delivery_mode,
 
 		result = 1;
 
-		if (dest_map)
+		if (dest_map) {
 			__set_bit(vcpu->vcpu_id, dest_map->map);
+			dest_map->vectors[vcpu->vcpu_id] = vector;
+		}
 
 		if (apic_test_vector(vector, apic->regs + APIC_TMR) != !!trig_mode) {
 			if (trig_mode)