/**
* kvm_arch_set_irq_inatomic: fast-path for irqfd injection
- *
- * Currently only direct MSI injection is supported.
*/
int kvm_arch_set_irq_inatomic(struct kvm_kernel_irq_routing_entry *e,
struct kvm *kvm, int irq_source_id, int level,
bool line_status)
{
- if (e->type == KVM_IRQ_ROUTING_MSI && vgic_has_its(kvm) && level) {
+ if (!level)
+ return -EWOULDBLOCK;
+
+ switch (e->type) {
+ case KVM_IRQ_ROUTING_MSI: {
struct kvm_msi msi;
+ if (!vgic_has_its(kvm))
+ break;
+
kvm_populate_msi(e, &msi);
- if (!vgic_its_inject_cached_translation(kvm, &msi))
- return 0;
+ return vgic_its_inject_cached_translation(kvm, &msi);
+ }
+
+ case KVM_IRQ_ROUTING_IRQCHIP:
+ /*
+ * Injecting SPIs is always possible in atomic context
+ * as long as the damn vgic is initialized.
+ */
+ if (unlikely(!vgic_initialized(kvm)))
+ break;
+ return vgic_irqfd_set_irq(e, kvm, irq_source_id, 1, line_status);
}
return -EWOULDBLOCK;
db = (u64)msi->address_hi << 32 | msi->address_lo;
irq = vgic_its_check_cache(kvm, db, msi->devid, msi->data);
-
if (!irq)
- return -1;
+ return -EWOULDBLOCK;
raw_spin_lock_irqsave(&irq->irq_lock, flags);
irq->pending_latch = true;