summaryrefslogtreecommitdiff
path: root/arch/x86/kvm/lapic.c
diff options
context:
space:
mode:
Diffstat (limited to 'arch/x86/kvm/lapic.c')
-rw-r--r--arch/x86/kvm/lapic.c40
1 files changed, 40 insertions, 0 deletions
diff --git a/arch/x86/kvm/lapic.c b/arch/x86/kvm/lapic.c
index d536d457517b..0cefba28c864 100644
--- a/arch/x86/kvm/lapic.c
+++ b/arch/x86/kvm/lapic.c
@@ -547,6 +547,46 @@ int kvm_apic_set_irq(struct kvm_vcpu *vcpu, struct kvm_lapic_irq *irq,
irq->level, irq->trig_mode, dest_map);
}
+int kvm_pv_send_ipi(struct kvm *kvm, unsigned long ipi_bitmap_low,
+ unsigned long ipi_bitmap_high, int min,
+ unsigned long icr, int op_64_bit)
+{
+ int i;
+ struct kvm_apic_map *map;
+ struct kvm_vcpu *vcpu;
+ struct kvm_lapic_irq irq = {0};
+ int cluster_size = op_64_bit ? 64 : 32;
+ int count = 0;
+
+ irq.vector = icr & APIC_VECTOR_MASK;
+ irq.delivery_mode = icr & APIC_MODE_MASK;
+ irq.level = (icr & APIC_INT_ASSERT) != 0;
+ irq.trig_mode = icr & APIC_INT_LEVELTRIG;
+
+ if (icr & APIC_DEST_MASK)
+ return -KVM_EINVAL;
+ if (icr & APIC_SHORT_MASK)
+ return -KVM_EINVAL;
+
+ rcu_read_lock();
+ map = rcu_dereference(kvm->arch.apic_map);
+
+ /* Bits above cluster_size are masked in the caller. */
+ for_each_set_bit(i, &ipi_bitmap_low, BITS_PER_LONG) {
+ vcpu = map->phys_map[min + i]->vcpu;
+ count += kvm_apic_set_irq(vcpu, &irq, NULL);
+ }
+
+ min += cluster_size;
+ for_each_set_bit(i, &ipi_bitmap_high, BITS_PER_LONG) {
+ vcpu = map->phys_map[min + i]->vcpu;
+ count += kvm_apic_set_irq(vcpu, &irq, NULL);
+ }
+
+ rcu_read_unlock();
+ return count;
+}
+
static int pv_eoi_put_user(struct kvm_vcpu *vcpu, u8 val)
{