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, 11 insertions, 0 deletions

diff --git a/include/uapi/linux/kvm.h b/include/uapi/linux/kvm.h
index 46ea1b470c76..a8f4ee5d2e82 100644
--- a/include/uapi/linux/kvm.h
+++ b/include/uapi/linux/kvm.h
@@ -742,6 +742,7 @@ struct kvm_ppc_smmu_info {
 #define KVM_CAP_HYPERV_TIME 96
 #define KVM_CAP_IOAPIC_POLARITY_IGNORED 97
 #define KVM_CAP_ENABLE_CAP_VM 98
+#define KVM_CAP_S390_IRQCHIP 99
 
 #ifdef KVM_CAP_IRQ_ROUTING
 
@@ -757,9 +758,18 @@ struct kvm_irq_routing_msi {
         __u32 pad;
 };
 
+struct kvm_irq_routing_s390_adapter {
+        __u64 ind_addr;
+        __u64 summary_addr;
+        __u64 ind_offset;
+        __u32 summary_offset;
+        __u32 adapter_id;
+};
+
 /* gsi routing entry types */
 #define KVM_IRQ_ROUTING_IRQCHIP 1
 #define KVM_IRQ_ROUTING_MSI 2
+#define KVM_IRQ_ROUTING_S390_ADAPTER 3
 
 struct kvm_irq_routing_entry {
         __u32 gsi;
@@ -769,6 +779,7 @@ struct kvm_irq_routing_entry {
         union {
                 struct kvm_irq_routing_irqchip irqchip;
                 struct kvm_irq_routing_msi msi;
+                struct kvm_irq_routing_s390_adapter adapter;
                 __u32 pad[8];
         } u;
 };