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authorCornelia Huck <cornelia.huck@de.ibm.com>2013-07-15 13:36:01 +0200
committerCornelia Huck <cornelia.huck@de.ibm.com>2014-03-21 13:43:00 +0100
commit84223598778ba08041f4297fda485df83414d57e (patch)
treebd93b83a13cc5cd1f6781bf681161fb3982548c5 /Documentation
parent841b91c584b6d1e2a2cb508bd2d0236cd37e1750 (diff)
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>
Diffstat (limited to 'Documentation')
-rw-r--r--Documentation/virtual/kvm/api.txt21
1 files changed, 17 insertions, 4 deletions
diff --git a/Documentation/virtual/kvm/api.txt b/Documentation/virtual/kvm/api.txt
index faf6fe9772c7..2cb1640a90ad 100644
--- a/Documentation/virtual/kvm/api.txt
+++ b/Documentation/virtual/kvm/api.txt
@@ -586,8 +586,8 @@ struct kvm_fpu {
4.24 KVM_CREATE_IRQCHIP
-Capability: KVM_CAP_IRQCHIP
-Architectures: x86, ia64, ARM, arm64
+Capability: KVM_CAP_IRQCHIP, KVM_CAP_S390_IRQCHIP (s390)
+Architectures: x86, ia64, ARM, arm64, s390
Type: vm ioctl
Parameters: none
Returns: 0 on success, -1 on error
@@ -596,7 +596,10 @@ Creates an interrupt controller model in the kernel. On x86, creates a virtual
ioapic, a virtual PIC (two PICs, nested), and sets up future vcpus to have a
local APIC. IRQ routing for GSIs 0-15 is set to both PIC and IOAPIC; GSI 16-23
only go to the IOAPIC. On ia64, a IOSAPIC is created. On ARM/arm64, a GIC is
-created.
+created. On s390, a dummy irq routing table is created.
+
+Note that on s390 the KVM_CAP_S390_IRQCHIP vm capability needs to be enabled
+before KVM_CREATE_IRQCHIP can be used.
4.25 KVM_IRQ_LINE
@@ -1336,7 +1339,7 @@ KVM_ASSIGN_DEV_IRQ. Partial deassignment of host or guest IRQ is allowed.
4.52 KVM_SET_GSI_ROUTING
Capability: KVM_CAP_IRQ_ROUTING
-Architectures: x86 ia64
+Architectures: x86 ia64 s390
Type: vm ioctl
Parameters: struct kvm_irq_routing (in)
Returns: 0 on success, -1 on error
@@ -1359,6 +1362,7 @@ 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;
};
@@ -1366,6 +1370,7 @@ struct kvm_irq_routing_entry {
/* gsi routing entry types */
#define KVM_IRQ_ROUTING_IRQCHIP 1
#define KVM_IRQ_ROUTING_MSI 2
+#define KVM_IRQ_ROUTING_S390_ADAPTER 3
No flags are specified so far, the corresponding field must be set to zero.
@@ -1381,6 +1386,14 @@ 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;
+};
+
4.53 KVM_ASSIGN_SET_MSIX_NR