KVM: Introduce kvm_vcpu_is_bsp() function.

Use it instead of open code "vcpu_id zero is BSP" assumption.

Signed-off-by: Gleb Natapov <gleb@redhat.com>
Signed-off-by: Avi Kivity <avi@redhat.com>

2 files changed, 5 insertions, 1 deletions

diff --git a/virt/kvm/ioapic.c b/virt/kvm/ioapic.c
index 2a5667173995..0532fa68f5d1 100644
--- a/virt/kvm/ioapic.c
+++ b/virt/kvm/ioapic.c
@@ -164,7 +164,9 @@ static int ioapic_deliver(struct kvm_ioapic *ioapic, int irq)
         /* Always delivery PIT interrupt to vcpu 0 */
         if (irq == 0) {
                 irqe.dest_mode = 0; /* Physical mode. */
-                irqe.dest_id = ioapic->kvm->vcpus[0]->vcpu_id;
+                /* need to read apic_id from apic regiest since
+                 * it can be rewritten */
+                irqe.dest_id = ioapic->kvm->bsp_vcpu->vcpu_id;
         }
 #endif
         return kvm_irq_delivery_to_apic(ioapic->kvm, NULL, &irqe);
diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c
index 0d481b282448..0d54edecbc70 100644
--- a/virt/kvm/kvm_main.c
+++ b/virt/kvm/kvm_main.c
@@ -1747,6 +1747,8 @@ static int kvm_vm_ioctl_create_vcpu(struct kvm *kvm, int n)
                 goto vcpu_destroy;
         }
         kvm->vcpus[n] = vcpu;
+        if (n == 0)
+                kvm->bsp_vcpu = vcpu;
         mutex_unlock(&kvm->lock);
 
         /* Now it's all set up, let userspace reach it */