KVM: s390: irq routing for adapter interrupts.

Introduce a new interrupt class for s390 adapter interrupts and enable
irqfds for s390.

This is depending on a new s390 specific vm capability, KVM_CAP_S390_IRQCHIP,
that needs to be enabled by userspace.

Acked-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>

1 files changed, 9 insertions, 0 deletions

diff --git a/include/linux/kvm_host.h b/include/linux/kvm_host.h
index 9816b68b085f..da7510b4c6ad 100644
--- a/include/linux/kvm_host.h
+++ b/include/linux/kvm_host.h
@@ -297,6 +297,14 @@ static inline unsigned long kvm_dirty_bitmap_bytes(struct kvm_memory_slot *memsl
         return ALIGN(memslot->npages, BITS_PER_LONG) / 8;
 }
 
+struct kvm_s390_adapter_int {
+        u64 ind_addr;
+        u64 summary_addr;
+        u64 ind_offset;
+        u32 summary_offset;
+        u32 adapter_id;
+};
+
 struct kvm_kernel_irq_routing_entry {
         u32 gsi;
         u32 type;
@@ -309,6 +317,7 @@ struct kvm_kernel_irq_routing_entry {
                         unsigned pin;
                 } irqchip;
                 struct msi_msg msi;
+                struct kvm_s390_adapter_int adapter;
         };
         struct hlist_node link;
 };